Image processing device and x-ray ct device
An image processing device and image technology, applied in image data processing, image analysis, medical image and other directions, can solve the problem of reducing detection accuracy and so on
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no. 1 Embodiment approach
[0039] figure 1 It is a diagram showing the configuration of the X-ray CT apparatus 100 according to the first embodiment. Such as figure 1 As shown, the X-ray CT apparatus 100 has: a gantry apparatus 10, a bed apparatus 20, and a console apparatus 30 (also referred to as “image processing apparatus”). In addition, the structure of the X-ray CT apparatus 100 is not limited to the structure of the following embodiment.
[0040] The gantry device 10 irradiates the subject P with X-rays to collect projection data. The gantry device 10 includes a gantry control unit 11 , an X-ray generator 12 , an X-ray detector 13 , a data collection unit 14 , and a rotary frame 15 .
[0041] The gantry control unit 11 controls the operation of the X-ray generator 12 and the rotary gantry 15 under the control of the scan control unit 33 described later. The gantry control unit 11 includes a high voltage generating unit 11a, a collimator adjusting unit 11b, and a gantry driving unit 11c. The ...
no. 2 Embodiment approach
[0087] The X-ray CT apparatus 100 according to the second embodiment determines a reference frame from a frame group, and starts detection of a heart boundary from the reference frame, as in the above-described embodiment. Here, in the first embodiment, an example was described in which a frame corresponding to a predetermined reconstruction center phase is specified as a reference frame using incidental information attached to each frame, but the embodiment is not limited to this. The X-ray CT apparatus 100 according to the second embodiment analyzes each frame (or sinogram data) to calculate the amount of cardiac activity covering a plurality of cardiac beat phases, and specifies a frame in which the amount of cardiac activity is relatively small based on the calculation result. , so as to determine the base frame.
[0088] Image 6 It is a figure which shows the structure of the system control part 38 which concerns on 2nd Embodiment. Such as Image 6 As shown, in the se...
no. 3 Embodiment approach
[0104] The X-ray CT apparatus 100 according to the third embodiment specifies a reference frame from a frame group, and starts detection of a heart boundary from the reference frame, as in the above-described embodiment. Here, in the above-mentioned embodiment, an example in which a predetermined reconstruction center phase is used as the reconstruction center phase used when reconstructing each frame is described, but the embodiment is not limited thereto. In the third embodiment, the reconstruction center phase itself is specified by analyzing the sinogram data.
[0105] Figure 12 It is a diagram showing the configuration of the image reconstruction unit 36 according to the third embodiment. Such as Figure 12 As shown, in the third embodiment, the image reconstruction unit 36 further includes a reconstruction center phase determination unit 36a. For example, the reconstruction center phase determination unit 36a analyzes the sinogram data stored in the raw data stor...
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