Ramer · Alavi Nuclear Medicine Technology

13 Thyroid, Parathyroid,and Salivary Gland Scintigraphy1) A technologist is performing a thyroid uptake with123 I sodium iodide. The capsule is counted before beingadministered to the patient, and 850,192 cpm areobtained. Six hours after swallowing the capsule, thecounts from the patient’s neck are 116, 239 and fromthe thigh, 34,982. Background for the uptake probe is239 cpm, and the six hour decay factor for 123 I is 0.730.What is the 6 hour uptake?a. 7.0%b. 9.5%c. 13.1%d. 18.7%2) Is the uptake value determined in question 1 a normalvalue?a. yesb. no3) What will the effect be if a technologist places the uptakeprobe over the proximal thigh when counting backgroundin the patient?a. the background will be falsely elevatedb. the background will be falsely decreasedc. the calculated uptake will decreased. a and ce. b and c