what does dr mean

DR refers to a new technology that directly performs digital X-ray photography under computer control. It uses amorphous silicon flat-panel detectors to convert the Series of image post-processing.

The DR system mainly consists of X-ray generating device, direct conversion flat panel detector, system controller, image monitor, image processing workstation, etc.

Due to the use of digital technology, DR can perform various image post-processing according to clinical needs, such as automatic image processing technology, edge enhancement and clear technology, zoom roaming, image splicing, area of ​​interest window width and window level adjustment, and distance , area, density measurement and other rich functions.

In addition, due to the wide dynamic range of DR technology, high X-ray quantum detection efficiency (DQE), and wide exposure latitude, good images can be obtained even if the exposure conditions are slightly poor. The emergence of DR breaks the concept of traditional X-ray images and realizes the coveted transformation from analog X-ray images to digital X-ray images. Compared with CR (Computed Radiography) system, it has greater advantages.

DR Features

(1) DQE, the detection efficiency can reach 74%, the DQE of ordinary screen combined X-ray photos is 30%.

(2) The DR imaging speed is fast, the acquisition time is less than 10ms, and the imaging time is only 3 seconds. The diagnostic radiologist can observe the image on the screen immediately. It can be transferred to the post-processing workstation in a few seconds for reading and issuing a diagnostic report. It takes about 5-10 minutes for conventional chest DR photos to be examined and issued with a diagnostic report.

(3) DR has high spatial resolution and low noise rate. Amorphous silicon is directly converted into electrical signals after being exposed to X-rays, which can avoid other imaging methods such as ordinary screen combination photos, CR, etc. The sharpness of the image is reduced due to scattering after light irradiates the phosphorous material, so a high-definition image can be obtained. And can obtain high-performance MTF curve.

(4) Digital images can be post-processed. Image post-processing is the biggest feature of digital images. As long as the original data is retained, the images can be processed in a targeted manner according to diagnostic needs and through software functions to improve the diagnostic rate. The processing content includes window technology, parameter measurement, feature extraction, image recognition, two-dimensional or three-dimensional reconstruction, grayscale transformation, and data compression. These are all important manifestations of applications in the field of high-tech medical imaging.

(5) DR has low radiation dose. Anteroposterior chest photos (adults) of a certain type of DR, using photo conditions of 125KV, 320MA, 0.3MAS, and a distance of 4500px, the X-ray dose is only 0.20 roentgens, which is only 1 of the X-ray dose of ordinary screen X-ray photos /53.3 (the X-ray dose of an ordinary screen X-ray chest anteroposterior radiograph is: 10.67 roentgens), which is 1/10 of the X-ray dose of a CR photo, that is, the X-ray dose received by a screen X-ray chest X-ray is equivalent to The total number of X-ray doses of 53.3 DR photos, so the X-ray dose received by DR photos is much lower than the radiation standard set by CEC. Reduce the adverse effects of X-ray exposure on the human body. Especially when children and adults of childbearing age who are more sensitive to X-rays need X-ray examinations. DR photos are your best choice.

(6) The direct conversion technology of DR makes network work simple and efficient, paving the way for full digitalization and film-free medical imaging.

(7) Effective solution It provides image archiving, management and transmission, uses CD burning to save image data, and can provide photo printing services to subjects at any time to prevent photo loss and duplication of photos, and high-definition DR photos are mutually recognized photos by major hospitals in the region. Imaging, there is no need to go to higher-level hospitals for repeated examinations, reducing the cost of repeated examinations.

In short, DR brings us high DQE, large latitude, low exposure dose, high-resolution images, fast X-ray conversion efficiency, and reduces the labor load of radiology technicians. . In the future, with the rapid development of computer technology, microelectronics technology and other information technologies, it will surely provide a broader space for the development of medical imaging and continuously improve the diagnostic level of medical imaging morphology.

The above is the detailed content of what does dr mean. For more information, please follow other related articles on the PHP Chinese website!