Advantages Disadvantages Flat-panel DR (amorphous silicon) 1, high conversion efficiency; 2, wide dynamic range; 3, high spatial resolution; 4, environmental adaptability; 5, the same image effect, the radiation dose is small High-grade imported flat-panel detector procurement costs and maintenance costs are high Flat-panel DR (amorphous selenium) 1, high conversion efficiency; 2, wide dynamic range; 3, spatial resolution; 4, sharpness is good 1, Selenium layer is sensitive to temperature, limited use conditions, poor environmental adaptability, high rate of bad boards, easy to use late artifacts; 2, slow imaging speed, unstable imaging quality CCD DR 1, mature technology, image quality is more than enough for routine clinical diagnosis, procurement and maintenance costs are low, the use of precision components combined with the structure of a variety of functional units can be dismantled individually for maintenance, which can significantly reduce the cost of maintenance; 2, low investment 1, obese patients and thicker parts of the shooting effect is not as good as the flat plate Suspended DR 1, high degree of intelligence, flat plate balloon flexible activities, the appearance of the atmosphere; 2, can achieve a full range of shooting, to achieve high-level clinical applications 1, the complex configuration of components, the need to install the groove steel skyrail, the installation of the high environmental requirements; 2, the suspension arm motors, travel switches, high failure rate, the high cost of post-maintenance Column DR 1, compact structure, simple operation, vertical and horizontal position switching with electric power, small space requirements, easy to install, few mechanical failures; 2, cost-effective, practicality and stability 1, some positions are limited to shoot