2. The half-value layer of 140 keV y-ray of Tc-99m is approximately 0.03 cm of lead. Calculate linear attenuation coefficient of the lead for 140 keV photons and the lead needed to reduce exposure of point source of radiation by 70%.

2. The half-value layer of 140 keV y-ray of Tc-99m is approximately 0.03 cm of lead. Calculate linear attenuation coefficient of the lead for 140 keV photons and the lead needed to reduce exposure of point source of radiation by 70%.

Principles Of Radiographic Imaging: An Art And A Science

6th Edition

ISBN:9781337711067

Author:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Publisher:Richard R. Carlton, Arlene M. Adler, Vesna Balac

Chapter40: Nuclear Medicine And Molecular Imaging

Section: Chapter Questions

Problem 3RQ

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2. The half-value layer of 140 keV y-ray of Tc-99m is approximately 0.03 cm of lead. Calculate
linear attenuation coefficient of the lead for 140 keV photons and the lead needed to reduce
exposure of point source of radiation by 70%.

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