Radiographic apparatus and radiographic system
A photographic device and radiation technology, applied in imaging devices, radiological diagnostic instruments, radiation/particle processing, etc., can solve the problems of deteriorating phase contrast image quality, reducing the contrast of intensity changes, and blurring of radiographic images, etc., to achieve suppression Phase contrast image quality degradation, suppression of relative positional deviation, effects of suppression of degradation
Inactive Publication Date: 2012-07-11
FUJIFILM CORP
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Problems solved by technology
However, it is very difficult to correct the moiré fringes whose spatial frequency varies corresponding to the relative deviation of the X-ray focus from each grating
As a result, the quality of the phase contrast image is degraded
[0012] Also, as in JP-A-2008-200359, when the holding structure is cantilevered in the in-plane direction perpendicular to the gravitational direction via the buffer material, the first grating and the second grating are easily inclined with respect to the grating surface determined by design, And it may be easy to deviate the relative position of each of the first grating and the second grating from the X-ray focal point
In particular, this deviation is significant at the free end, thus degrading the quality of the phase contrast image
[0013] In addition, when the first grating deviates from the focal point in the arrangement direction (x direction) of the grating slits, the radiographic image formed by the radiation passing through the first grating becomes blurred at the position where the radiation is incident on the second grating
Therefore, the contrast of the intensity variation detected in the radiographic image detector is reduced, thereby deteriorating the quality of the phase contrast image
Method used
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[0066] figure 1 One example of the configuration of a radiographic system for illustrating an exemplary embodiment of the present invention is shown, and figure 2 yes figure 1 Control block diagram of the radiographic system.
[0067] The X-ray imaging system 10 is an X-ray diagnostic apparatus that performs imaging on a subject (patient) H while the patient is standing, and includes: an X-ray source 11 that irradiates the subject H; a guide housing 16 that has The contact member that contacts the subject H and supports the subject H; the imaging unit 12, which is opposite to the X-ray source 11, the subject H is placed between the X-ray source 11 and the imaging unit, and the imaging unit 12 detects the The ray source 11 penetrates the X-rays of the subject H, and thus generates image data; and the console 13 (refer to figure 2 ), which controls the exposure operation of the X-ray source 11 and the imaging operation of the imaging unit 12 based on operator operations, ca...
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The present invention provides a RADIOGRAPHIC APPARATUS AND RADIOGRAPHIC SYSTEM. The radiographic apparatus includes a guide housing, a first grating unit, a radiological image detector and a grating pattern unit. The guide housing houses a first grating unit, the grating pattern unit, and a radiological image detector and supports a subject to which radiation is irradiated. The grating pattern unit includes a periodic form having a period and masks a radiological image formed by the radiation having passed through the first grating. The radiological image detector detects a masked radiological image which is formed by masking the radiological image by the grating pattern unit. The first grating unit and the grating pattern unit are supported by the guide housing with a buffer material being interposed between the first grating unit and the grating pattern unit and an inner wall of the guide housing.
Description
technical field [0001] The present invention relates to a radiographic apparatus and a radiographic system capable of phase imaging a subject by using radiation such as X-rays. Background technique [0002] Since X-rays are attenuated depending on the atomic number of elements constituting a substance and the density and thickness of the material, it can be used as a probe for seeing through the inside of an object to be diagnosed. Imaging using X-rays is widely used in fields such as medical diagnosis and non-destructive testing. [0003] In a general X-ray imaging system, an object to be diagnosed is disposed between an X-ray source that emits X-rays and an X-ray image detection detector that detects X-rays, and a transmission image of the object to be diagnosed is captured. In this case, the X-rays emitted from the X-ray source to the X-ray image detector are attenuated depending on the differences in material properties (such as atomic number, density, and thickness) pr...
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IPC IPC(8): A61B6/00
CPCG21K2207/005A61B6/484A61B6/4021A61B6/4291G21K1/025
Inventor 村越大笹尾正典
Owner FUJIFILM CORP