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Radiology, Vol 149, 545-548, Copyright © 1983 by Radiological Society of North America

ARTICLES

Gray scale of ultrasound instruments: evaluation using a test object

C Kimme-Smith, J Winter, A Norman, W King 3d, RY Chu, M Pincu and D Rimkus

B-mode scans of castor oil in a wedge-shaped container provide gray level maps. The relation between the gray levels and the amounts of absorbing medium can be used to measure the effects of electronic gain, transducer characteristics, and the overall gray level performance of different ultrasound systems. We report results from four units and ten transducers for varying scanning depths.




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Copyright © 1983 by the Radiological Society of North America.