Advantages and disadvantages of CCD-DR

First, Dr can be roughly divided into two types of flat DR and CCD-DR (of course there are other types such as multi-wire proportional chamber detector, ignored here ).

Compared with flat-panel DR, CCD-DR has many advantages:

1. mature technology, the whole machine is cheap, and the cost-effectiveness is significantly higher than that of flat-panel dr. With the same charging standard, the duration of hospital recovery investment is significantly shortened. I think this is the biggest advantage of CCD-DR;
2. The working environment (temperature, humidity, etc.) is much wider than the flat Dr;
3. the failure rate is far lower than that of the flat panel DR, and the working stability of the whole machine is higher than that of the flat panel Dr;
4. If a fault occurs out of the warranty period, the risk of the hospital's heavy maintenance costs will be much lower than that of the flat Dr: the CCD detector can be split and repaired, and the corresponding parts can be replaced; the flat-panel Dr is likely to have to be replaced easily.
5. The final image quality, the gap between the CCD-DR and the flat-panel Dr is very small. It is more than enough to satisfy the radiology examination. Some types of flat-panel Dr devices are not stable, and the quality of work is often difficult to meet the requirements. CCD-DR generally does not have this situation.

CCD-DR also has its shortcomings:

1. The use of optical conversion systems during imaging causes geometric distortion of images and can only be repaired by optical components and later software. Although the last image we see is a non-distorted image, but the intermediate conversion to repair, the pixel loss is a lot;
2. The X-ray dose is significantly higher than that of flat-panel dr. In particular, when taking pictures of limbs and other images that require high resolution, the X-ray dose is almost the same as normal film photography. Minimizing X-ray dose is one of the Developmental Directions of imaging devices, and it is clear that CCD-DR is not doing well in this area.