Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 4, Problem 4.31P

(a)

To determine

The specific power of 90Sr in W/MBq .

(b)

To determine

The specific power of 90Sr in W/kg .

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The intensity of radiation at 10 ft was 200 R/hr. If the technologist moved to 5 ft from the source of radiation, what would the exposure be? O a. 400 R/hr Ob. 800 R/hr Oc. 100 R/hr Od, 50 R/hr
250 mA and .2 sec creates a good radiograph of a lateral thoracic spine withappropriate exposure to the IR. The technologist wants to modify this technique to give the patient time to breathe during the exposure. If the time is changed to 2 seconds, what new mA will maintain exposure?
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