Nuc. Med.

Question 1

When an unstable atomic nucleus decays by converting a neutron into a proton with the emission of an anti-neutrino, this process results in ______.

Answer 1

Beta minus decay

Question 2

Iodine-129 (I-129, with an atomic number Z of 53), a long-lived radioisotope commonly used in the quality assurance of radiation counting equipment, decays to xenon-129 (Z = 54). The mode of decay of I-129 to Xe-129 is ______.

Answer 2

Beta minus decay

Question 3

A parent isotope with mass number A, neutron number N, and atomic number Z, undergoes radioactive decay by alpha emission, The resulting daughter isotope has what properties?

Answer 3

A - 4
N - 2
Z - 2

Question 4

Pinhole collimators have long been used in nuclear medicine to produce magnified images of small strucutres, such as the thyroid. A patient is positioned near the pinhole aperture such that the distance from the patient’s neck to the pinhole aperture is less than the collimator cone length, yielding a magnified image. If the patient is moved farther away from the collimator, how do the detection sensitivity and spatial resolution change?

Answer 4

Sensitivity decreases and resolution decreases

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