The FPD C-arm System acts as the surgeon’s eye and is the device used for imaging during surgery. They are widely used in interventional radiology for minimally invasive surgery to guide doctors in accurate positioning during surgery. Due to its low dose and small footprint, it can be flexibly used in orthopedics, surgery, gynecology and other departments in hospitals.
The mobile C-arm can be divided into a flat C-arm and FPD C-arm System according to different imaging systems. So, what is the difference between the two?
In principle, the FPD C-arm System is composed of a reinforcing tube, a tube container, a power supply, an optical system and a bracket. X-rays pass through the human body, form an X-ray image on the input screen of the intensifier tube, and become visible light on the input screen. This visible light passes through the photocathode connected to the input screen, and photoelectrons are emitted from the photocathode. Under the action of the electronic lens formed by the anode, a reduced electronic image is formed on the output fluorescent screen after focusing acceleration. The electronic image is converted into a visible light image through the output screen, and the light image on the output screen is sent to the TV CCD by the optical system, and the image can be displayed on the monitor. .
The flat C-arm is composed of an amorphous silicon layer with a photodiode function as a scintillation layer, and a thin film transistor TFT arranged in an array element manner. X-rays pass through the human body, and the scintillator layer converts the X-ray photons into visible light, and then the amorphous silicon photoelectric layer converts them into electrical signals. Then the scanning controller reads the electrical signals and converts them into digital signals. The digital signal information is displayed on the monitor. show.
Compared with the FPD C-arm System, the flat C-arm has obvious advantages: the image is more stable and clear, the field of view is better, and the software algorithm is more advanced. Compared with the shadow-increasing C-arm, the imaging principle of the flat C-arm avoids the loss in signal conversion, improves the utilization rate of X-rays, greatly improves the imaging speed, and takes less time to obtain the required image information. The dose and radiation time are also reduced.
With the further development of related technologies of flat-panel detectors, the current mobile C-arm is gradually being upgraded from an image intensifier to a digital X-ray flat-panel detector, breaking the limitations of traditional image intensification imaging distortion, signal loss and service life. Lower dose, larger effective imaging area, and higher imaging quality. The dynamic flat C-arm will become the standard equipment for clinical application of minimally invasive interventional fluoroscopic imaging in orthopaedics and pain, making medical diagnosis more accurate