Chapter 8: Quality Control of Fluoroscopic Equipment
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Q1) A photocathode is a device that emits
A)light photons.
B)x-ray photons.
C)electrons.
D)all of the above.
Q2) The input phosphor of an image intensifier tube converts a(n) _____ image into a(n) _____ image.
A)x-ray; light
B)light; electron
C)electron; light
D)x-ray; electron
Q3) In standard broadcast television, one image frame consists of
A)one television field.
B)two television fields.
C)262.5 scan lines.
D)17 ms.
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Chapter 11: Mammographic Quality Standards
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Q1) The B + F value determined from sensitometric testing of mammographic film processors must not vary by more than ____ from the initial control value.
A)±0.01%
B)±0.03%
C)±0.05%
D)±0.10%
Q2) The recommended maximum tolerance of kVp variance for mammographic x-ray generators is A)1%.
B)2%.
C)5%.
D)10%.
Q3) The maximum allowable dose per exposure for mammographic images is ____ rad.
A)0.1
B)0.2
C)0.3
D)0.5
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Chapter 12: Quality Control in Computed Tomography
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Q1) The laser light field and radiation field should coincide to within ____ mm.
A)0.5
B)1.0
C)2.0
D)5.0
Q2) For ACR CT accreditation, the Water CT Number and Standard Deviation (Noise) should be evaluated by the CT technologist
A)quarterly.
B)monthly.
C)weekly.
D)daily.
Q3) The minimum distance between two objects that allows them to be seen as separate and distinct would define what CT imaging parameter?
A)Low-contrast resolution
B)Uniformity
C)High-contrast resolution
D)Image noise
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Chapter 13: Quality Control for Magnetic Resonance
Imaging Equipment
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Q1) What is the resonant frequency in a unit with a 1.0-T magnet and a gyromagnetic ratio of 42.57 MHz/T?
A)12.77 MHz
B)21.29 MHz
C)42.57 MHz
D)63.86 MHz
Q2) A change in the strength of the main magnetic field can be caused by
A)cryogen boiloff.
B)external ferromagnetic materials.
C)shim coil failure.
D)all of the above.
Q3) What is the maximum luminance for soft-copy display devices as suggested by the ACR?
A)Less than 1.2 nit
B)Greater than 50 nit
C)Greater than 90 nit
D)Less than 150 nit
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Page 15
Chapter 14: Ultrasound Equipment Quality Assurance
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Q1) A measurement comparing the actual separation between two reflectors placed at different positions along the beam axis with the separation indicated on the calipers is a test of
A)axial resolution.
B)ultrasound wavelength.
C)vertical distance measurement accuracy.
D)horizontal distance measurement accuracy.
Q2) Suppose that the maximum depth of visualization using a 3.5-MHz transducer is 14.2 cm.On the previous two tests, 3 months and 6 months earlier, it was 14.4 and 14.1 cm, respectively.These variations should be interpreted as
A)just barely tolerable performance.
B)normal variations inherent in the machine.
C)excessive variations, indicating that the machine requires immediate service.
D)normal variations inherent in the measurement process.
Q3) Maximum depth of visualization is often limited by A)noise at high gain.
B)poor axial resolution.
C)too low a power setting.
D)too low a transducer frequency.
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Page 16
Chapter 15: Quality Assurance in Nuclear Medicine
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Q1) The dose equivalent limit per year for the hands of a nuclear medicine technologist is
A)0.5 rem (5 mSv).
B)5 rem (50 mSv).
C)30 rem (300 mSv).
D)50 rem (500 mSv).
Q2) Photopeak evaluation of the gamma camera should be performed at least A)daily.
B)weekly.
C)quarterly.
D)semi-annually.
Q3) The ability to produce a linear image with straight lines corresponding to the same straight lines of a bar pattern is known as A)photopeaking.
B)field uniformity.
C)spatial resolution.
D)spatial linearity.
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