题目内容

How does technetium-99m decay?

A. Electron capture
B. Isomeric transformation
C. Alpha decay

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Molybdenum-99 is used as the parent radioisotope for which generator?

A. a) Gallium-68
B. b) Technetium-99m
C. c) Fluorine-18

Using a cyclotron, what radioisotope is produced from irradiating oxygen-18 water with protons?

A. a) Fluorine-18
B. b) Nitrogen-13
C. c) Carbon-11

Each element is defined by its Atomic Number (Z) and Mass Number (A). The Mass Number is:

A. a) The element’s number of protons.
B. b) The element’s number of neutrons.
C. c) The sum of the element’s number of protons and neutrons.

The second imaging examination revealed left pleural effusion. The doctor draws the fluid and performs a cytopathological examination. One day later, the patient's symptoms of dyspnea suddenly worsened and accompanied by pain during breathing. Which of the following checks is most useful:

A. Chest MRI
B. Lung SPECT
C. Abdominal ultrasound
D. CT pulmonary artery imaging

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