What is the inspection of cr exposure in digital photography?

The CR system uses an imaging plate (imaging plate; IP) as a carrier, X-ray exposure and information reading are used to form digital or plane images. Current CR systems can provide the same resolution as screen film photography. CR system realizes the digitization of conventional X-ray photography information, and directly converts the analog information of conventional X-ray photography into digital information. It can improve the resolution and display ability of images and break through the inherent limitations of conventional X-ray photography technology. Computer technology can be used to realize various image post-processing functions and increase the level of displayed information; It can reduce the radiation dose of X-ray photography and reduce radiation damage; The digitized information obtained by CR system can be transmitted to the lower image archiving and communication system. PACS) to realize telemedicine.

2.DRDR is a TV system based on X-ray, which makes the analog video signal directly enter the computer for storage, analysis and preservation after sampling and A/D conversion. X-ray digital images have high spatial resolution and large dynamic range. Objects with contrast lower than 1% and diameter greater than 2MM can be observed in their images. The surface X-ray dose measured on the patient is only110 compared with conventional photography. Quantum detection rate (detection quantum efficiency; ; DQE) can reach more than 60%. X-ray information can be processed by computer after it is digitized. By improving image details, reducing image noise, gray scale, contrast adjustment, image enlargement, digital subtraction and so on. , displaying the feature information that can't be seen in the unprocessed image. With the help of artificial intelligence and other technologies, images can be quantitatively analyzed and feature extracted, and computer-aided diagnosis can be carried out.

Digital X-ray photography includes drum mode and direct digital photography (direct digital photography; DDR), Charge Coupled Devices (Charge Coupled Devices; CCD) camera array mode and other modes. Digital images have high resolution, good clarity and clear details. The radiation dose is small, and the exposure latitude is large. Various images can be post-processed according to clinical needs. Radiology department can be filmless, and departments and hospitals are networked to facilitate teaching and consultation.