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3自动增益控制电路(AGC电路) 在X线影象增强器电视中观察的是人体不同部位的影象,由于人体各个部位的密度是不同,因而显示出来的病灶对比度也不同。x线剂量自动控制器,国外称x线影象亮度稳定器(X-Ray Image Brightness Stabilizer)即IBS。它是在透照人体不同部位时,能自动调整辐射剂量,以保证X线影象增强器输出图象的亮度稳定不变。为此,在X线影象增强器电视中需要加-AGC电路,自动调整显示的对比度,以便使观察具有最良好的效果。
3 Automatic gain control circuit (AGC circuit) in the X-ray image intensifier TV is observed in different parts of the human body images, due to the density of various parts of the body is different, which shows the lesion contrast is also different. X-ray dose automatic controller, said abroad X-ray image brightness stabilizer (X-Ray Image Brightness Stabilizer) IBS. It is in different parts of the human body when transposed, it can automatically adjust the radiation dose to ensure that the X-ray image intensifier output brightness of the image stable. To this end, in the X-ray image intensifier TV need to add-AGC circuit, automatically adjust the display contrast, so that the observation has the best results.