| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 378150000 | Variable | 53 |
| 20080260103 | X-RAY IMAGING APPARATUS - When a tabletop is rolling, an aperture specifying unit calculates an aperture of diaphragm blades such that a radiation field is to be R′ based on a rolling angle, where R′ is a radiation field having the same radiation area of X-rays after tabletop rolling as a radiation area before the tabletop rolling. The aperture specifying unit instructs a beam-limit control unit to take the calculated aperture of the diaphragm blades in an X-ray beam limiting device. Then, the beam-limit control unit controls the aperture of the diaphragm blades such that the radiation field is to be R′. | 10-23-2008 |
| 20080285718 | X-RAY DIAPHRAGM - A diaphragm system for an x-ray apparatus for scanning an object is provided. The diaphragm system includes a diaphragm support arranged within a radiation path of an x-ray beam. The diaphragm support includes at least two different individual diaphragms. The at least two different individual diaphragms may be controlled as a function of a definable radiation intensity and/or the size of a surface of the object to be irradiated and can be introduced into the radiation path. | 11-20-2008 |
| 20090010395 | ADJUSTABLE APERTURE COLLIMATOR - A collimator including an inner border whose inner perimeter defines an aperture, an outer border positioned outwards of the inner border, an enclosure being defined and bounded between the inner and outer borders, the enclosure being sufficiently filled with a radiopaque pliable material so as to block a predefined amount of radiation from passing through the enclosure, while allowing radiation to pass through the aperture, and at least one actuator attached to at least one point of the inner border operable to deform the inner border so as to modify a shape of the aperture. | 01-08-2009 |
| 20090074147 | APPARATUS FOR SHIELDING X-RAYS AND X-RAY DEVICE INCORPORATING SAID APPARATUS - An X-ray shielding apparatus ( | 03-19-2009 |
| 20090129552 | X-RAY OPTIC WITH VARYING FOCAL POINTS - An x-ray optical device delivers an x-ray beam with variable convergence. The convergence or the divergence of the x-ray beams varies over different parts of the reflector. The device may include an adjustable aperture to further select the convergence or divergence. The adjustable aperture selects the convergence angle by selectively occluding a portion of the x-ray beams. | 05-21-2009 |
| 20090196401 | Machine vision system - A fluorescing marker is used in order to mark (for example) a leaf of a multi-leaf collimator and/or the reference points within the field of view. The markers are illuminated with light tuned to cause the markers to fluoresce at a wavelength different to that of the illuminating light. The fluorescence is then detected by a camera. This method allows the image to be captured by the camera with increased contrast. Accordingly, the present invention provides a multi-leaf collimator for a radiotherapeutic apparatus, comprising at least one leaf having a fluorescent marker. The fluorescent marker will usually emit light of a wavelength longer than the incident light, allowing suitable filters to be provided in order to distinguish the light emitted by the markers. A suitable material for use in the fluorescent markers is ruby. The present invention also provides a radiotherapeutic apparatus comprising a multi-leaf collimator as defined above, and a camera arranged to view the fluorescent markers. A source of illumination for the fluorescent markers is ideally monochromatic, or nearly so. The camera can have a filter arranged to substantially prevent light of the wavelength emitted by the source of illumination from entering the camera, thereby improving the contrast of the image. The radiotherapeutic apparatus can also comprise a source of illumination that is optically co-located with a radiation source, to allow the radiation field that will be emitted to be checked visually by an operator. The co-located source is preferably substantially monochromatic, emitting substantially no light at the wavelength of the fluorescent markers. A filter can then be placed over an output of the radiotherapeutic apparatus, for blocking light of the wavelength of the fluorescent markers and thereby enhancing the contrast of the image that is taken of the fluorescent markers. | 08-06-2009 |
| 20090207975 | Multi-leaf collimator - A multi-leaf collimator for use in a radiotherapeutic apparatus comprises a plurality of elongate narrow leaves arranged side-by side and supported in a frame, the frame having upper and lower formations for guiding each leaf into which extend ridges on the upper and lower edges of the leaves, thereby to allow the leaves to move in a longitudinal direction, the upper and lower formations being aligned so that the sides of the leaves when fitted are at a non-zero angle to the beam direction, the upper and lower ridges being located on the upper and lower edges of the leaves so that a line joining their centres is at a non-zero angle to the sides of the leaf, tilted relative to the sides in a sense opposite to that of the beam. An outer face of the upper and/or lower ridges can be aligned with a side face of the leaf, for ease of manufacture. A radiotherapeutic apparatus is also disclosed, comprising a source of radiation and a multi-leaf collimator for shaping the radiation emitted by the source, the multi-leaf collimator being as set out above. | 08-20-2009 |
| 20100008472 | LAMELLA COLLIMATOR AND BEAM THERAPY APPLIANCE - A lamella collimator, in particular for a beam therapy appliance, is provided. The lamella collimator has a plurality of lamellae, which can be moved by a motor or motors in a movement direction in order to preset a countour of a beam path on an X-ray beam. Each lamella has a position measurement apparatus with a movable measurement element, which is attached directly to the respective lamella. | 01-14-2010 |
| 20100054420 | ADJUSTING DEVICE FOR BARRIER BLADE OF SCATTERED X-RAY - An adjusting device for a barrier blade includes a barrier blade for limiting scattered X-ray of a tube and a base plate for mounting the barrier blade. The adjusting device also includes a barrier blade support and a drive unit, wherein said barrier blade support includes a sliding post; said barrier blade support is fixedly connected to the barrier blade and mounts the barrier blade in the opening of the base plate; and the drive unit controls and changes the path of the sliding post to cause the sliding post to drive the barrier blade support to make rectilinear movement on the base plate, thereby driving the barrier blade thereon to make rectilinear movement in the opening of the base plate. This adjusting device for a barrier blade of scattered X-ray has advantages of simple structure, small space, high reliability, and low cost. | 03-04-2010 |
| 20100111261 | ADD-ON-X-RAY-COLLIMATOR FOR NON-SYMMETRICAL BEAM COLLIMATION - It is described a device ( | 05-06-2010 |
| 20100278310 | MULTI-LEAF COLLIMATOR WITH ROTATORY ELECTROMECHANICAL MOTOR AND OPERATING METHOD - Multi-leaf collimators have a guide frame ( | 11-04-2010 |
| 20100296631 | FILTERING OF A SOURCE OF PULSED RADIATION - A source of pulsed radiation is coupled to a positionable filter. The positionable filter includes an element that produces an indication of a position of the filter. The source is configured to receive the indication of the position of the filter, and to regulate emission of a pulse of radiation based on the indication. A device includes an area including a material that alters a parameter of a beam of radiation that interacts with the material. The device is configured to move relative to a source of pulsed radiation. An element provides a signal to the source of pulsed radiation that indicates a position of the area relative to the source. The signal causes the source to trigger emission of a pulse at a time such that the emitted pulse is incident upon a portion of the area. | 11-25-2010 |
| 20120148028 | LINKAGE MECHANISM, A COLLIMATOR, AND AN X-RAY MACHINE - A linkage mechanism of a scattered ray inhibition apparatus and a radiation field control apparatus is provided. The linkage mechanism includes a first timing belt, a second timing belt, and a transmission mechanism between the first timing belt and the second timing belt, wherein the scattered ray inhibition apparatus is mounted on the first timing belt, the radiation field control apparatus is mounted on the second timing belt, the transmission ratio of the transmission mechanism is equal to the ratio of the moving speed of the scattered ray inhibition apparatus to the moving speed of the radiation field control apparatus. | 06-14-2012 |
| 20120155615 | METHOD AND DEVICE FOR ADJUSTING A COLLIMATOR RADIATION FIELD IN AN X-RAY IMAGING SYSTEM - A method and device for adjusting a collimator radiation field and an X-ray imaging system including the device are disclosed. | 06-21-2012 |
| 20120183126 | COLLIMATOR AND CONTROL METHOD THEREOF - A collimator for adjusting the shape of a region irradiated by radiation and a control method thereof. The collimator includes a plurality of irises to adjust the shape of the irradiation region, a light source outputting light to display the irradiation region, a reflective mirror to adjust a path of light radiated from the light source toward the irradiation region, and an image output unit outputting to the irradiation region a visible image representing the shape of a target object for radiography or a mark indicating the center of the radiation region. | 07-19-2012 |
| 20120250828 | CONTROL APPARATUS AND CONTROL METHOD - A control apparatus for controlling an X-ray irradiation area, in which an acquisition circuit acquires information relating to an effective area of a sensor, and a control circuit controls the X-ray irradiation area based on the information relating to the effective area. | 10-04-2012 |
| 20130136239 | APPARATUS & METHODS FOR COLLIMATION OF X-RAYS - Apparatus and methods for collimation of x-ray beams. According to various embodiments, an x-ray apparatus may comprise a first rotatable disk comprising a first plurality of angled slots and a first shutter comprising a first plurality of protruding members. At least one of the first plurality of protruding members may be positioned within a first angled slot of the first plurality of angled slots, and at least one of the first plurality of protruding members may be positioned within a second angled slot of the first plurality of angled slots. The first shutter may at least partially define an x-ray collimation aperture, and the apparatus may be configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the x-ray collimation aperture. | 05-30-2013 |
| 20130142313 | Contour Collimator Having a Liquid Impermeable to X-Rays - A contour collimator and a method for setting a contour of a radiation path of an x-ray are provided. A liquid impermeable to the x-ray forms the contour. | 06-06-2013 |
| 20130188779 | DEVICES, APPARATUS AND METHODS FOR ANALYZING, AFFECTING AND/OR TREATING ONE OR MORE ANATOMICAL STRUCTURES - Exemplary embodiments of an apparatus and a system for generating at least one radiation are provided. For example, an exemplary system can include at least one radiation source arrangement configured to generate the at least one radiation, is translatable on at least one track, and is pivotable about at least two axes; a tracking assembly configured to track an internal movement of a target tissue within a living structure and provide tracking information to facilitate directing the radiation(s) generated by the radiation source arrangement(s) at the target tissue; and a collimator assembly configured to move in a curved path so as to shape and direct the at least one radiation generated by the radiation source arrangement(s). | 07-25-2013 |
| 20130251109 | BEAM LIGHTING UNIT FOR RADIOGRAPHIC APPARATUS - Method for limiting an X-ray beam, wherein the X-ray beam is limited by a limiting unit comprising a couple of blades approaching each other or moving away from each other to adjust the width of a space between the blades the two blades being driven by an actuator ( | 09-26-2013 |
| 20130272504 | X-Ray Dose Reduction by Controlled Shutter Speed - A fast moving X-Ray shutter has four independently controlled blades defining a Region of Interest (ROI). The ROI area receives the normal X-Ray dose and is exposed at the machine's X-ray pulse frame rate. The ROI can be automatically controlled based on image contents using computer vision techniques. Periodically the shutter blades retract at a controlled speed, exposing the area outside the ROI to a lower, non-uniform, exposure. The non-uniformity in this background exposure is dynamically corrected by a look-up table. The displayed image is a seamless combination of the ROI image and the corrected background image. The displayed image has slightly lower resolution outside the ROI but better resolution (as compared to standard fluoroscopy practices) in the ROI because of reduced scattering. | 10-17-2013 |
| 20130294582 | X-RAY IMAGING APPARATUS - An X-ray imaging apparatus is provided with a multi X-ray source and a collimator in which a plurality of slits for X-rays to pass through are two-dimensionally formed, the size and position of the slits being adjustable. A control unit, as a first control mode, controls the size and position of the slits to move an examination region in parallel, when an X-ray source is changed to a different X-ray source, such that the examination directions are parallel before and after the change. Also, the control unit, as a second control mode, controls the size and position of the slits to rotate the examination direction, when an X-ray source is changed to a different X-ray source, such that the center of the examination regions is the same before and after the change. | 11-07-2013 |
| 20140254768 | MULTI-LEAF COLLIMATORS - The leaves of a multi-leaf collimator can be driven more easily and hence more quickly if they are supported on a ball-race instead of in a sliding groove. A recirculating path is preferred, in which the rolling elements of the ball-race support the leaf over part of their path and then return to a start of the path. In addition, the rolling elements could be driven by a drive screw in order to drive the leaf. | 09-11-2014 |
| 20140270091 | ROTATING DRUM COLLIMATOR - Exemplary embodiments of the present invention are directed to a rotating drum collimator for collimating an energy beam to produce a scanning beam that includes a drum having a substantially cylindrical sidewall with a first helical groove and a second helical groove formed in the cylindrical side wall, and a motor operatively connected to the drum, and configured to cause rotation of the drum about a longitudinal axis of the drum. Each of the first helical groove and the second helical groove comprises a first end portion, a middle portion and a second end portion, and a width of the first end portion and the second end portion of each of the first helical groove and the second helical groove is greater than the middle portion of each of the first helical groove and the second helical groove. | 09-18-2014 |
| 20150294748 | Variable Angle Collimator - A system for producing a controllable beam of radiation is controllable electronically, and includes no parts that must move relative to one another while in operation to form the beam. The direction and cross-section of the beam may be controlled electronically by controlling an electron beam. Various embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the aperture material thickness without requiring movement of the aperture or physical components that create the aperture. Some embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the beam angle. | 10-15-2015 |
| 20160015335 | X-RAY CT APPARATUS - There is provided an X-ray CT apparatus including: an X-ray source; a wedge which is disposed between the X-ray source and a subject and in which a shield blocking apart of an X ray is formed; a wedge driving unit for moving position of the wedge; and a system control unit controlling the wedge driving unit during a scan execution period to control the position of the wedge. | 01-21-2016 |
| 378151000 | Automatic | 5 |
| 20080317212 | X-RAY RADIATION DIAPHRAGM AND CONTROL METHOD THEREFOR, AND CT DEVICE EMBODYING SAME - A collimator device has at least one masking device that is adjustable between two end positions for collimation of a beam fan in an x-ray CT device, wherein the x-ray fan is schematically not masked in a first end position. The x-ray beam is more than half-masked in a second end position of the masking device. In a method for operation of such a collimator device as well as an x-ray CT device for examination of a subject having an x-ray source, a collimator device, and a control device for regulation of the aperture width of the masking device, an x-ray detector is arranged opposite the x-ray source and the collimator device and that detects the x-rays modified due to the intervening examination subject; and an image construction device reconstructs an image of the examination subject therefrom. | 12-25-2008 |
| 20090060144 | AUTOMATED X-RAY OPTIC ALIGNMENT WITH FOUR-SECTOR SENSOR - A system for x-ray optical alignment. The system includes an x-ray source, an optic, a collimation element, and alignment sensors. The x-ray source generates an x-ray beam that is directed by the optic at a sample. The collimation element is located between the optic and the sample to define the profile of the x-ray beam. The sensors receive the x-ray beam from the optic and generated signal indicative of the system alignment. The sensors may be located on a surface of the collimation element facing the optic. The inner edge of the sensors may be located at equal intervals radially about the collimation element and may form an aperture having a symmetric shape. | 03-05-2009 |
| 20090080619 | MULTILEAF COLLIMATOR - A multileaf collimator includes a first leaf block group including plural leaf blocks, a second leaf block group including plural leaf blocks arranged in the same direction as the first leaf block group and disposed opposite the leaf blocks of the first leaf block group, plural magnetic layers located on the respective leaf blocks of the first and second leaf block groups so as to be positioned on faces of the leaf blocks along a moving direction of the leaf blocks, plural magnetic sensors mounted on the respective leaf blocks and varying output signals when the respective leaf blocks are moved in an oncoming direction or a departing direction, and a control device controlling drive mechanisms according to the output signals delivered by the respective magnetic sensors so that spacing between the leaf blocks of the first and second leaf blocks is adjusted into a target configuration. | 03-26-2009 |
| 20130003936 | Adjustable-Jaw Collimator - An adjustable collimator for shaping a beam of particles, such as for purposes of inspecting contents of a container. The adjustable collimator has an obscuring element substantially opaque to passage of the particles in a propagation direction that is radial with respect to the axis of rotation of a ring of apertures. A gap in the obscuring element may be characterized by a length taken along a long dimension and a jaw spacing taken along narrow dimension, and at least one of the length of the gap and the jaw spacing is subject to adjustment, either manual or automatic. The adjustable collimator may be disposed either inside or outside the ring of apertures, and, in some embodiments, the jaw spacing may be a function of distance along the long dimension relative to an edge of the gap. | 01-03-2013 |
| 20150313568 | RADIATION CONTROL AND MINIMIZATION SYSTEM AND METHOD USING COLLIMATION/FILTERING - A radiation control system and method are provided in which radiation delivered to a patient and/or the operator of the equipment is minimized. The radiation control system may be used in a large variety of applications including applications in which radiation source is used to inspect an object, such as, for example, medical imaging, diagnosis and therapy, in manufacturing operation using radiation, in airports scanning systems, in different security setups, and in nuclear reactors automation and process control. The radiation control system and method may also be used with 3D imaging. | 11-05-2015 |
| 378152000 | With linear leaf motion | 18 |
| 20080267356 | MULTI-LEAF COLLIMATOR WITH LEAVES FORMED OF DIFFERENT MATERIALS - A multi-leaf collimator includes a number of independently adjustable leaves. Adjacent leaves overlap to prevent an incident beam of radiation from passing through a gap between them. The overlapping portions of the leaves are made of a first material, while the non-overlapping portions of the leaves are made of a second, different material. | 10-30-2008 |
| 20080285719 | Leaf sequencing - Systems and methods of controlling the leaves of an aperture in radiation treatment are disclosed. In some embodiments, these systems and methods allow the delivery of different radiation fluences to different parts of a treatment volume in a single rotation of the aperture around the treatment volume. In some embodiments, different radiation fluences are achieved by radiating different parts of the treatment volume from opposing positions of the aperture around the treatment volume. In some embodiments, different radiation fluences are achieved by assigning different leaf pairs to radiate different parts of the treatment volume. | 11-20-2008 |
| 20080292058 | Device for Limiting Field on Which Radiation is Irradiated - An irradiation field limiting device includes a plurality of aperture leaves arranged in a thickness direction, a flexible linear member secured to a thick portion of the aperture leaf, a driver section which drives the linear member a specific amount, and the like. One end of the linear member is secured to an aperture leaf through a connection section tangentially to the outer arc of the aperture leaf, and the other end is connected with a slider provided in a driver section. The slider is connected with a driving source through a connection portion and moves along an axial direction of a drive shaft inserted into a base accompanying rotation of the drive shaft. A load accompanying the movement of the slider is directly transmitted to the linear member, and the aperture leaf is driven a specific amount due to the load. | 11-27-2008 |
| 20080298553 | Particle-Beam Treatment System - Provision is made for a particle-beam treatment system in which, even during particle-beam irradiation, the shape of a multileaf collimator is monitored. The particle-beam treatment system, in which multi-layer conformal irradiation is performed while the setting of the shape of the multileaf collimator in an irradiation head is changed during particle-beam irradiation, is provided with an optical shape-monitoring unit mounted attachably and detachably in the snout portion at the downstream side of the multileaf collimator, the optical shape-monitoring unit having a shape-monitoring mirror, opposing the multileaf collimator, for monitoring the shape of the multileaf collimator; a video camera for shooting the multileaf-collimator shape reflected by the shape-monitoring mirror; and an image monitor for displaying an image of the video camera that shoots the shape of the multileaf collimator. | 12-04-2008 |
| 20090041199 | Multileaf collimator and radiation therapy device - The invention relates to a multileaf collimator having a plurality of leaves mounted displaceably in an adjusting direction for establishing a contour of a beam path. Each displaceably mounted leaf is assigned at least one linear drive having at least one piezoelectric actuator for displacing the leaf in the adjusting direction. Because the piezoelectric actuator can be driven precisely, an improved radiation therapy can be achieved, particularly in the case of a radiation therapy device having a multileaf collimator of said kind, owing to precise establishing of the contour. | 02-12-2009 |
| 20090041200 | Radiation therapy imaging and delivery utilizing coordinated motion of jaws, gantry, and couch - A method of delivering a radiation therapy treatment plan to a treatment area of a patient. The treatment plan is delivered using a radiation therapy system including a moveable support for supporting a patient, and a gantry moveable relative to the support. The gantry supports a radiation source, a set of jaws having a jaw width and a multi-leaf collimator for modulating the radiation during delivery of the treatment plan. The support is moved during delivery of the treatment plan to the treatment area, and the width of the jaws is dynamically adjusted during delivery of the treatment plan to the treatment area. | 02-12-2009 |
| 20090074148 | Collimator for Defining a Beam of High-Energy Rays - The invention relates to a collimator ( | 03-19-2009 |
| 20090262901 | Multi-leaf collimators - A multi-leaf collimator for a radiotherapy apparatus comprises at least one array of laterally-spaced elongate leaves, each leaf being driven by an associated motor connected to the leaf via a drive means so as to extend or retract the leaf in its longitudinal direction, the drive means comprising a sub-frame on which at least a subset of the motors are mounted, the sub-frame being mounted at a location spaced from the leaf array in a direction transverse to the lateral and longitudinal directions, and including a plurality of leadscrews disposed longitudinally, each being driven by a motor and being operatively connected to a leaf thereby to drive that leaf. | 10-22-2009 |
| 20100034357 | COLLIMATOR - A collimator ( | 02-11-2010 |
| 20100061519 | SHUTTER MECHANISM FOR COLLIMATING X-RAYS - A shutter mechanism for collimating x-rays has two parallel drive shafts and two parallel guide shafts orthogonal to the drive shafts to define a rectangular aperture. Two flexible bands moving around a generally rectangular path about the aperture independently control the positions of each set of shutters. Two cams on the drive shafts control the positions of the flexible bands and shutters. A pair of transverse shutters made of an x-ray opaque material are held in sliding engagement between the drive shafts. One end of each transverse shutter is attached to the first flexible band adjacent to the drive shafts. Similarly, a pair of longitudinal shutters are held in sliding engagement between the drive shafts. One end of each longitudinal shutter is attached to the second flexible band adjacent to the guide shafts. | 03-11-2010 |
| 20110026683 | Multi-leaf collimators - A multi-leaf collimator for a radiotherapy apparatus comprises at least one array of laterally-spaced elongate leaves, each leaf being driven by an associated motor connected to the leaf via a drive means so as to extend or retract the leaf in its longitudinal direction, the drive means comprising a sub-frame on which at least a subset of the motors are mounted, the sub-frame being mounted at a location spaced from the leaf array in a direction transverse to the lateral and longitudinal directions, and including a plurality of threaded drives disposed longitudinally, each being driven by a motor and being operatively connected to a leaf thereby to drive that leaf. | 02-03-2011 |
| 20110293071 | METHOD FOR CALCULATING HEAD SCATTER PHASE SPACE FOR RADIATION TREATMENT USING A MULTI-LEAF COLLIMATOR WITH DYNAMIC JAWS - A method is proposed for accurate and efficient modeling of head scatter phase space for treatments with dynamic jaws. Specifically, the method enables the efficient calculation of the head scatter phase space in case of a dynamic treatment where jaws and MLC leaves move during the delivery. In one embodiment, the invention can be used to calculate the head scatter contribution during final dose calculation of dynamic treatments. This novel method also enables an accurate calculation of the head scatter contribution from optimal fluence and from jaw positions without having to calculate the leaf sequence. In this embodiment, the invention can be used in optimization of large field IMRT treatments. | 12-01-2011 |
| 20130294583 | X-Ray Collimator - An X-ray collimator for controlling an X-ray radiation field, having a lower base member, a pair of regulating members, a pair of surrounding members having substantially U-shaped forms in planar view, N columnar members surrounded by the pair of surrounding members (where N is 4, 6, or 8), a guiding member, a pair of moving members moving parallel to the opposed surfaces of the regulating members, an upper base member, a first motor for horizontally moving the pair of moving members, and a second motor for moving the columnar members. The first motor is driven to horizontally move the pair of moving members over the same distance in opposite directions. The second motor is configured to move one of the columnar members along an internal surface of the surrounding member surrounding the columnar member, thereby moving the other N−1 columnar members sequentially. | 11-07-2013 |
| 20140010355 | POSITION SENSORING METHOD AND SYSTEM FOR A MULTI-LEAF COLLIMATOR - A multi-leaf collimator for radiation therapy in which the position of the leaves are determined by measuring a magnetic field allows to determine the leaf position with enhanced precision, and is at the same time robust to perturbations or disturbances. The magnetic sensor may comprise a magnetic encoder that varies in a predefined pattern along a lengthwise direction of the magnetic element, in particular according to a step function. | 01-09-2014 |
| 20140112453 | MULTI LEVEL MULTILEAF COLLIMATORS - A multilevel MLC includes a first set and a second set of a plurality of pairs of beam blocking leaves arranged adjacent one another. Leaves of each pair in the first set are disposed in an opposed relationship and longitudinally movable relative to each other in a first direction. Leaves of each pair in the second set are disposed in an opposed relationship and longitudinally movable relative to each other in a second direction generally parallel to the first direction. The first and second sets of pairs of leaves are disposed in different planes. | 04-24-2014 |
| 20140146949 | COLLIMATOR AND CT SYSTEM COMPRISING THE SAME - A CT collimator comprising: a first gate and a second gate arranged in parallel on a slide rail, the first gate being fixed to a support rack of the CT collimator via elastic members; an electromagnet system arranged on one of the first gate and the second gate; and a metal plate arranged on the other side of the one of the first gate and the second gate relative to the electromagnet system, one end of the metal plate being fixed on the other of the first gate and the second gate and the other end of the metal plate extending to below the electromagnet system, wherein the electromagnet system is configured to engage the first gate and the second gate via the metal plate when the electromagnet system is triggered. | 05-29-2014 |
| 20150124938 | Multi-leaf collimators - A multi-leaf collimator for a radiotherapy apparatus comprises at least one array of laterally-spaced elongate leaves, each leaf being driven by an associated motor connected to the leaf via a drive means so as to extend or retract the leaf in its longitudinal direction, the drive means comprising a sub-frame on which at least a subset of the motors are mounted, the sub-frame being mounted at a location spaced from the leaf array in a direction transverse to the lateral and longitudinal directions, and including a plurality of threaded drives disposed longitudinally, each being driven by a motor and being operatively connected to a leaf thereby to drive that leaf. | 05-07-2015 |
| 20160071623 | CONTOUR COLLIMATOR FOR RADIOTHERAPY - The invention relates to a contour collimator for radiotherapy, comprising a plurality of plate-shaped diaphragm elements provided in a guiding block and movably arranged with respect to one another to form a contour diaphragm for a radiation beam emitted by a radiation source towards the collimator, and at least one drive for moving the diaphragm elements, wherein a drive of its own is associated with each diaphragm element, the drives of a group of diaphragm elements are arranged substantially adjacent to one another, and the drive is a linear motor, wherein each linear motor comprises a linearly movable rod directly fixed to the associated diaphragm element. The invention facilitates a design of a contour collimator with a shape being as compact as possible, and wherein both precise and stable adjustability of the diaphragm elements is achieved without a backlash. In this way improvements to contour collimators are provided. | 03-10-2016 |
| 378153000 | With pivotal leaf motion | 4 |
| 20110038466 | SLIT MECHANISM APPARATUS AND X-RAY COMPUTED TOMOGRAPHY APPARATUS - According to one embodiment, a slit mechanism apparatus includes, two slit plates configured to adjust a thickness of X-rays, two slit link bars which are pivotally supported on two ends of each of the two slit plates to interlock the two slit plates, two shafts on which the two slit link bars are respectively mounted to rotate the two slit link bars, two shutter plates configured to block/pass the X-rays, and two shutter link bars which are pivotally supported on two ends of each of the two shutter plates to interlock the two shutter plates and are mounted on the two shafts together with the two slit link bars. | 02-17-2011 |
| 20150055759 | RADIATION BEAM COLLIMATION SYSTEM AND METHOD - The invention provides a method for collimating a radiation beam, the method comprising subjecting the beam to a collimator that yaws and pitches, either separately or simultaneously relative to the incident angle of the beam. Also provided is a system for collimating radiation beams, the system comprising a collimator body, and a stage for pitching and yawing the body. A feature of the invention is that a single, compact mask body defines one or a plurality of collimators having no moving surfaces relative to each other, whereby the entire mask body is moved about a point in space to provide various collimator opening dimensions to oncoming radiation beams. | 02-26-2015 |
| 20150374315 | IMAGING SYSTEM AND METHOD - The present invention is related to system and method for capturing dental images, for example, an aiming and positioning device for capturing dental images of a patient's teeth using a collimator. The system includes an image receptor holding device with an elongated arm adapted to receive and couple the receptor holder to a collimation structure. The elongated arm extends between the collimator and the receptor holder with one end coupling to the rear portion of the receptor holder and another end coupling to the collimator, and aligns the receptor with the collimator opening in an unobstructed manner. A biting portion or surface is present on the elongated arm adjacent to the receptor holder such that when the receptor is positioned behind the teeth on which the images are being taken, the biting surface is gripped by the teeth of the patient. | 12-31-2015 |
| 20160038105 | IMAGING SYSTEM AND METHOD - The present invention is related to system and method for capturing dental images, for example, an aiming and positioning device for capturing dental images of a patient's teeth using a collimator. The system includes an image receptor holding device with an elongated arm adapted to receive and couple the receptor holder to a collimation structure. The elongated arm extends between the collimator and the receptor holder with one end coupling to the rear portion of the receptor holder and another end coupling to the collimator, and aligns the receptor with the collimator opening in an unobstructed manner. A biting portion or surface is present on the elongated arm adjacent to the receptor holder such that when the receptor is positioned behind the teeth on which the images are being taken, the biting surface is gripped by the teeth of the patient. | 02-11-2016 |
