The significance of medical doctor

Digital radiography, direct digital radiography system.

DR consists of detector, image processor and image display. X-ray signals transmitted through human body are detected and obtained, and digital images are directly formed. Digital image data is transmitted to the computer, displayed on the display, and can also be post-processed. At present, the main DR detectors are amorphous silicon detector and amorphous selenium detector, and there is little difference between the two detectors in obtaining images. There are also multi-wire proportional chamber detectors, which are air detectors. And a CCD detector. Amorphous silicon detector and amorphous selenium detector are both called flat panel detectors.

1. Read the film directly through a professional monitor without developing the film, which greatly saves the film cost (except for patients with special needs);

2. After 2. DR upgrade can avoid all kinds of troubles such as taking the wrong film. If the wrong film is taken or the patient's body moves and the picture effect is poor, the doctor can quickly see the affected results and shoot again.

3. The display of bone structure, articular cartilage and soft tissue is superior to the traditional X-ray imaging, and the mineral salt content can also be quantitatively analyzed; Easy to display mediastinal structures such as blood vessels and trachea; The detection rate of nodular lesions is higher than that of traditional X-ray images. It is superior to traditional X-ray images in observing calcium-containing diseases such as intestinal pneumatosis, pneumoperitoneum and calculus. Tomography is superior to X-ray tomography. Gastrointestinal double contrast radiography is superior to traditional X-ray radiography in displaying gastric cells, tiny lesions and intestinal mucosal folds.

4. the imaging process of DR the imaging process of dr is a digital imaging process. X-ray detector converts and digitizes X-ray energy passing through human body. The whole X-ray imaging process includes X-ray collection, conversion, quantification, transmission, processing and display, which is a digital information processing process. Digital photography mode has changed the basis of image information formation. The carrier of X-ray signal is no longer a screen/film system, but a variety of X-ray detectors. X-ray detectors digitally collect, convert, store, process and display the X-ray intensity distribution representing human body information through different signal acquisition principles.