Regarding quality assurance in radiography: a. The tube kV is tested

1.	Regarding quality assurance in radiography: a. The tube kV is tested using a dosimeter b. Tube output is assessed with an ionization chamber or a solid-state detector c. For a given mAs, the output of the tube should be constant over the entire voltage range d. Tube filtration is assessed by measuring the half-value layer (HVL) e. Light beam diaphragm alignment should be checked yearly.
Answer» a. False. It is tested using a digital kV meter. b. True. c. False. In the range of 60–120 kV, tube output is proportional to the square of the peak kV (kVp² ). For lower kV (e.g. in mammography), output is proportional to kVp³ . d. True. e. False. It is usually tested every 1–2 months.

Regarding quality assurance in radiography: a. The tube kV is tested using a dosimeter b. Tube output is assessed with an ionization chamber or a solid-state detector c. For a given mAs, the output of the tube should be constant over the entire voltage range d. Tube filtration is assessed by measuring the half-value layer (HVL) e. Light beam diaphragm alignment should be checked yearly.

Answer»

a. False. It is tested using a digital kV meter.

b. True.

c. False. In the range of 60–120 kV, tube output is proportional to the square of the peak kV (kVp² ). For lower kV (e.g. in mammography), output is proportional to kVp³ .

d. True.

e. False. It is usually tested every 1–2 months.

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