DR flat panel detector working principle
The flat panel detector is a complex and expensive device, which plays a decisive role in image quality. Familiarity with detector performance specifications can help improve image quality and reduce X-ray radiation dose.
Digital radiography (DR) is a new technology developed for radiography in 1990. With its faster imaging speed, easier operation, higher image resolution and other significant advantages, it has become the leading direction in digital radiography and is recognized by clinical and imaging experts worldwide.
The core technology of DR is the flat panel detector. The flat panel detector is a complex and expensive device that plays a decisive role in imaging quality. Familiarity with detector performance indicators will help us improve image quality and reduce X-ray radiation dose
Flat panel detectors consist of a housing (protective layer), a fluorescence layer, a circuit board and a heat sink. The fluorescence layer is divided into CSI and GDS (GDOS0). The CSI phosphor layer shows a clearer image, while the GDS phosphor screen is more sensitive.
According to the semiconductor material, it can be divided into amorphous selenium flat panel detector and amorphous silicon flat panel detector. Amorphous selenium flat panel detectors have high sensitivity and are usually used for dynamic panels.
According to the classification of image software, there can be medical software, animal software and industrial software.
When using flat panel detectors, it should be noted that the most suitable temperature for flat panel working environment is 5° to 35°. In case of use in tropical areas, cooling control should be applied. Also, attention should be paid to the etching effect. The theoretical lifetime of the flat panel detector is 3 years. Long-term use of flat panel detectors can produce artifacts that cannot be eliminated due to the etching effect, thus affecting image quality.
