Performance evaluation of image-intensifier tubes.

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Abstract
A series of image quality measurements were obtained over 2 yr for 8 image-intensifier tube fluoroscopic units used in clinical practice. The measurements were in agreement with a radiologist''s opinion of the image quality for each tube. Some systems did not change significantly over the 2 yr period, while others deteriorated from acceptable to unacceptable image quality during this time. For this reason, measurements should be obtained for all diagnostic fluoroscopic equipment at least semiannually to monitor image quality and remedy any changes before diagnostic accuracy is severely affected.

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