Patent application number | Description | Published |
20090147916 | REAL-TIME DOSE RECONSTRUCTION USING DYNAMIC SIMULATION AND IMAGE GUIDED ADAPTIVE RADIOTHERAPY - A radiation therapy treatment method comprises imaging a subject and simulating four-dimensional aspects of radiotherapy. A treatment plan based on the simulation is generated to permit real-time, three-dimensional dose reconstruction at the time of treatment. The simulation and treatment plan are used during treatment fractions to achieve real-time image guidance. | 06-11-2009 |
20090149735 | INTEGRATED EXTERNAL BEAM RADIOTHERAPY AND MRI SYSTEM - A radiation therapy system comprises a radiation source generating a beam of radiation and a magnetic resonance imaging apparatus. An interface acts between the radiation source and the MRI apparatus that permits irradiation to be performed simultaneously with imaging. The MRI apparatus and radiation source are coupled such that the system can be used in a rotation mode whereby the radiation source can irradiate a subject from basically any angle without reducing MRI image quality. | 06-11-2009 |
20110175694 | MAGNETIC ASSEMBLY AND METHOD FOR DEFINING A MAGNETIC FIELD FOR AN IMAGING VOLUME - Disclosed herein is a magnet assembly that includes at least two magnets arranged in a fixed spaced relationship with one another thereby to define a space between the magnets that encompasses an imaging volume. Each of the magnets produces a variety of magnetic field strengths across inward-facing surfaces thereof that, in combination, produce an acceptably homogeneous magnetic field in the imaging volume. Also disclosed is a method of defining a magnetic field for an imaging volume. The method comprises generating an initial model of a magnet assembly; estimating a magnetic field for the imaging volume based on the model; calculating deviation between the estimated magnetic field and a target magnetic field for the imaging volume; and updating the model to reduce the deviation by modifying the magnet assembly to produce a variety of magnetic field strengths that, in combination, produce substantially the target magnetic field in the imaging volume. | 07-21-2011 |
20110218420 | RADIATION THERAPY SYSTEM - A radiation therapy System comprises a magnetic resonance imaging (MRI) apparatus and a linear accelerator capable of generating a beam of radiation. The linear accelerator is immersed in and oriented with respect to the MRI magnetic field to expose the linear accelerator to magnetic force that directs particles therein along a central axis thereof. | 09-08-2011 |
20120069962 | REAL-TIME DOSE RECONSTRUCTION USING DYNAMIC SIMULATION AND IMAGE GUIDED ADAPTIVE RADIOTHERAPY - A radiation therapy treatment method comprises imaging a subject and simulating four-dimensional aspects of radiotherapy. A treatment plan based on the simulation is generated to permit real-time, three-dimensional dose reconstruction at the time of treatment. The simulation and treatment plan are used during treatment fractions to achieve real-time image guidance. | 03-22-2012 |
20120150016 | IMAGE GUIDED RADIATION THERAPY SYSTEM AND SHIELDED RADIO FREQUENCY DETECTOR COIL FOR USE THEREIN - A radiation therapy system includes a radiation source capable of generating a beam of radiation; a magnetic resonance imaging (MRI) apparatus comprising at least one radiofrequency detector coil; and an electrically grounded dielectric material between the radiation source and the radiofrequency detector coil for shielding the at least one radiofrequency detector coil from the beam of radiation. Also disclosed is a radiofrequency detector coil for a magnetic resonance imaging (MRI) apparatus sheathed at least in part by a dielectric material that is adapted to be electrically grounded. | 06-14-2012 |
20150080704 | REDUCING ARTEFACTS IN MRI IMAGE DATA - A computer-implemented method is provided for reducing artefacts in an MRI image as a result of radiation induced current in collector coils of an MRI apparatus. The method comprises the following steps. Selecting a plurality of pixels in a k-space image prior to generation of the MRI image. Analysing each of the plurality of selected pixels to determine whether a pixel intensity is greater than a predefined global threshold. For each pixel having pixel intensity greater than the predefined global threshold, determining whether the pixel lies within a signal region of the k-space image or outside of the signal region of the k-space image. For each pixel that lies outside of the signal region, modifying the pixel intensity to be similar to a background pixel intensity, thereby creating a modified k-space image. Generating the MRI image based on the modified k-space image. A non-transitory computer readable medium and a radiation therapy system configured to implement the method are also provided. | 03-19-2015 |
20150251020 | RADIATION THERAPY SYSTEM - A radiation therapy System comprises a magnetic resonance imaging (MRI) apparatus and a linear accelerator capable of generating a beam of radiation. The linear accelerator is immersed in and oriented with respect to the MRI magnetic field to expose the linear accelerator to magnetic force that directs particles therein along a central axis thereof. | 09-10-2015 |