150-water is a radioactive variation of regular water, in which some usual oxygen atoms are replaced by positron-emitting 150. This liquid is used in positron emission tomography. The half-life of 150 is 122 seconds. Consider a patient who received a sample of 150-water with an activity of 1.2 mCi. Determine the activity of the sample in the patient's body after 18 minutes has passed, if no 150-water has left the patient's body in this time. Ο Α. 2.2 HCi Ο Β. 2.6 HCi OC. 2.2 mCi O D. 1.1 mCi

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150-water is a radioactive variation of regular water, in which some usual oxygen atoms are replaced by positron-emitting
150. This liquid is used in positron emission tomography. The half-life of 150 is 122 seconds. Consider a patient who
received a sample of 150-water with an activity of 1.2 mCi. Determine the activity of the sample in the patient's body
after 18 minutes has passed, if no 150-water has left the patient's body in this time.
OA. 2.2 μCi
OB. 2.6 μCi
OC. 2.2 mCi
OD. 1.1 mCi
Transcribed Image Text:150-water is a radioactive variation of regular water, in which some usual oxygen atoms are replaced by positron-emitting 150. This liquid is used in positron emission tomography. The half-life of 150 is 122 seconds. Consider a patient who received a sample of 150-water with an activity of 1.2 mCi. Determine the activity of the sample in the patient's body after 18 minutes has passed, if no 150-water has left the patient's body in this time. OA. 2.2 μCi OB. 2.6 μCi OC. 2.2 mCi OD. 1.1 mCi
The radioactive isotope of rubidium 82Rb is widely used in myocardial perfusion imaging. 82Rb has a very short half-
life (1.27 minutes), so it is produced from its parent nucleus 825r at the medical facilities. The settings for the production of
82Rb are known as strontium-rubidium generators. The half-life of 825r is 25.36 days, so 825r should be supplied to
medical facilities on a monthly base. The initial activity of 825r in the generator was 2.8 MBq. Determine the activity of
strontium in the generator after 20 days of usage.
OA. 34 µCi
B. 15.6 µCi
OC. 43.8 µCi
OD. 1.62 µCi
Transcribed Image Text:The radioactive isotope of rubidium 82Rb is widely used in myocardial perfusion imaging. 82Rb has a very short half- life (1.27 minutes), so it is produced from its parent nucleus 825r at the medical facilities. The settings for the production of 82Rb are known as strontium-rubidium generators. The half-life of 825r is 25.36 days, so 825r should be supplied to medical facilities on a monthly base. The initial activity of 825r in the generator was 2.8 MBq. Determine the activity of strontium in the generator after 20 days of usage. OA. 34 µCi B. 15.6 µCi OC. 43.8 µCi OD. 1.62 µCi
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