QUESTION 1

A national project is being instituted to monitor the inception of osteoporosis in the elderly using gamma ray transmission technique. Derive an equation which will give the minimum detectable fractional change in osteoporotic bone. Assuming for simplicity a monoenergetic beam of incident photons

QUESTION 2

A sample of 90Ic (T1/2 =6h) is assayed to you an activity of 9mci. It is administered by intravenous injection to a patient suspected of having carcinoma of the lungs 49 hour later. What is the activity in Bq as that time.


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