Patent application number | Description | Published |
20150030222 | METHOD AND SYSTEM FOR DATA COMPRESSION - A method and a system for data compression are provided. The method may include: obtaining scanning data to be compressed; compressing the scanning data using a first compression method and a second compression method to obtain a first compressed data and a second compressed data respectively, where a compression ratio of the first compressed data is lower than a compression ratio of the second compressed data; and determining whether the compression ratio of the first compressed data meets a predetermined compression ratio requirement, if yes, determining the first compressed data as a compression result data corresponding to the scanning data, if no, determining the second compressed data as a compression result data corresponding to the scanning data. Scanning data compressed by the method or the system can meet target compression requirements. | 01-29-2015 |
20150085984 | SCANNING METHOD AND DEVICE WITH REDUCED SCANNING DOSAGE - A scanning method and device are provided. The method includes: determining values for a first scanning dosage and a second scanning dosage used in a scanning process based on a trigger condition which varies regularly and attenuation fluctuations of an object to be scanned, wherein the first scanning dosage is higher than the second scanning dosage, and at least one of the first scanning dosage and the second scanning dosage has an inconstant value; and scanning a target position with the determined values. In the present disclosure, a scanning dosage may be reduced and different image noises may be kept consistent. | 03-26-2015 |
20150094575 | METHOD AND DEVICE FOR TRACKING CONTRAST MEDIUM - A method and a device for tracking a contrast medium by scanning are provided. The method includes: obtaining a relationship between a contrast medium concentration and time according to concentration values of the contrast medium obtained by previous scannings; predicting a time interval from a current time point to a time point when a target concentration value reaches according to the relationship between the contrast medium concentration and time; and starting a routine examination at the end of the time interval. In the present disclosure, a routine examination may be performed in time. | 04-02-2015 |
20160058400 | METHOD AND APPARATUS FOR CONTROLLING SHAPE FILTER IN CT SCANNING DEVICE - The disclosure includes: judging whether a center line of an object to be scanned is deviated from a rotation axis of a gantry of a CT scanning device; determining a first distance by which the center line of the object to be scanned is deviated from the rotation axis in a case that the center line of the object to be scanned is deviated from the rotation axis; determining according to the first distance a second distance by which the shape filter is to be translated in each projection angle; and controlling the shape filter to make it translate by the second distance in each corresponding projection angle. | 03-03-2016 |
20160058405 | DOSE BASED X-RAY SCANNING - A method and device for X-ray scanning based on dose, comprising: receiving an X-ray dose for scanning set for a region of a subject to be scanned, selecting a scanning and reconstructing technology combination according to said pre-set X-ray dose for scanning wherein the demanded X-ray dose of the selected scanning and reconstructing technology combination satisfies said pre-set X-ray dose for scanning, and scanning said region and implementing a reconstruction accordingly with the selected scanning and reconstructing technology combination to obtain a resultant scanning image. | 03-03-2016 |
20160063686 | DOSE MODULATED X-RAY SCANNING - A method and a device for dose modulated X-ray scanning, comprising: setting a target image quality standard for a scanning region, determining a reference data level for the scanning region, calculating a theoretical X-ray scanning dose for the scanning region according to the target image quality standard and the reference data level, calculating the X-ray attenuation difference between each data level corresponding to the scanning region and the reference data level according to the theoretical X-ray scanning dose, determining any one of the data levels corresponding to the scanning region, which X-ray attenuation difference with the reference data level is higher than a threshold as a target to be de-noised, and performing a noise reduction for the target to be de-noised. | 03-03-2016 |
20160110893 | CORRECTING A CT SCAN IMAGE - A method for correcting a CT scan image is provided. A target image including a target region to be corrected is extracted from an original CT scan image. A target projection range corresponding to the target region is obtained by orthographically projecting the target image, and target projection data within the target projection range is corrected. Noise of the corrected target projection data is adjusted to generate noise-adjusted target projection data to improve noise consistency between target region and the rest of the CT scan image. A corrected CT scan image is reconstructed based on the noise-adjusted target projection data. | 04-21-2016 |
20160135777 | MODULATING X-RAY RADIATION DOSE IN CT SCAN - A method for modulating x-ray radiation dose in CT scan is disclosed. The method may include: acquiring x-ray attenuation information of each Z position within a planned scanning sequence for a scan region of a subject from data of a finished scanning sequence for the subject; and then, based on the acquired x-ray attenuation information, performing dose modulation with respect to the XY scanning profile at each Z position within the planned scanning sequence. The finished scanning sequence can be an axial and/or helical scanning sequence for a scan region wholly or partially same as the scan region and has been performed earlier. The Z position may include a position in Z direction extending from head to foot of the subject or conversely. The XY scanning profile may include a scanning profile of the subject which is vertical to Z direction. | 05-19-2016 |