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.
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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
Which of the following statements is true?
A. Single energy CT scanners and dual energy scanners use the same X-ray source but single energy CT scanners are set with a low energy source, whereas dual energy scanners are set with a high energy source
B. Single energy CT scanners differ from dual energy scanners by using different settings for the X-ray source.
C. Dual energy CT scanners run with an X-Ray tube potential set to double the energy set with single energy CT scanners.
What was the main advantage of using cone-beam spiral CT scanners in comparison to fan beam scanners?
Allow three-dimensional projection techniques as well as the development of reconstruction techniques operating in three dimensions.
B. The time taken to complete the scan was increased.
C. The elimination of the lateral movement of the tube-detector
What is an average dose received by an adult patient undergoing one CT scan?
A. 50-100 of the radiation dose unit of measurement.
B. 2–5 of the radiation dose unit of measurement.
C. 500-1000 of the radiation dose unit of measurement.
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