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Professional Medical Equipment Supplier - Yuesen Med Professional Medical Equipment Supplier - Yuesen Med

Hot Products

YSX500D 50kW DR system set up and put into service in Cambodia.

YSENMED YSX500D 50kW digital x-ray system has been successfully set up and put into service in a hospital in Cambodia.

YSX056-PE serving as a vehicle-mounted x-ray in the Philippines

YSX056-PE 5.6kW portable x-ray unit has been adapted to fit on a truck, to provide mobile x-ray examination service for remote communities in the Philippines.

X Ray Machine  To  Zimbabwe

x ray machine, 50KW x ray machine

Microscope To Malawi

Achromatic objectives: 4X、10X、40X(S), 100X(S、Oil) Wide field eyepiece: WF10X(WF16X for option) Eyepiece head: Sliding binocular head inclined at 45° Stage: Double layer mechanical stage size 140X140mm, moving range 75X45mm Focusing: Coaxial coarse and

Flat panel detector

Views : 936
Author : Monica Liang
Update time : 2015-11-13 08:00:00

Flat panel detectors are a class of solid-state medical x-ray imaging devices similar in principle to the image sensors used in digital radiography and video, but due to the impracticability of focusing x-rays, the sensors are hundreds of times larger than those used in digital cameras.

X-rays pass through the subject being imaged and strike a scintillator layer of gadolinium oxysulfide or cesium iodide which converts the x-rays into light. Directly behind the scintillator layer is an amorphous silicon-on glass detector array manufactured using a process very similar to that used to make LCD televisions and computer monitors. Like an TFT-LCD display, millions of roughly 0.1 mm pixels each containing a thin-film transistor form a grid patterned in amorphous silicon on the glass substrate. Unlike an LCD, but similar to a digital camera's image sensor chip, each pixel also contains a photodiode which generates an electrical signal in proportion to the light produced by the portion of scintillator layer in front of the pixel. The signals from the photodiodes are amplified and encoded by additional electronics positioned at the edges or behind the sensor array in order to produce an accurate and sensitive digital representation of the x-ray image.

Flat-panel detectors are more sensitive, faster and cheaper than film. Their sensitivity allows a lower dose of radiation for a given picture quality than film. They are lighter, far more durable, smaller in volume, more accurate, and have much less image distortion than image intensification detectors and can also be produced in larger sizes.

 

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