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Chapter 38 questions with complete solutions
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Chapter 38 questions with complete solutions
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Chapter 38What overall technique change is necessary when transitioning from a static image to a tomographic
image of the same anatomy? - correct answer ✔✔double
Constant- potential generators (CPG) of a mobile unit allow the radiographer to make what adjustment
to technique when compared to a 3-phase, 6-pulse generator? - correct answer ✔✔8 kVp less
Which of the following tomographic settings would be appropriate for a IVU (pylogram) study? - correct
answer ✔✔20-degree linear tomography
Increasing the X-ray tube current (mA) is the best way to reduce quantum mottle and improve the
quality of the fluoroscopic image. True or False? - correct answer ✔✔True
The distance transversed by the X-ray tube during an exposure is called: - correct answer ✔✔slice?
Which of the following is a typical "ripple effect" for a CPG mobile unit? - correct answer ✔✔<1%
What type of timer is typically used on a mobile radiography unit? - correct answer ✔✔mAs timer
In order to demonstrate a joint space radiographically, the most important relationship to maintain is
keeping the CR perpendicular to the IR. True or False? - correct answer ✔✔False
Which portion of the output screen on an image intensifier has the greatest brightness? - correct answer
✔✔center
A tomographic exposure should be how long? - correct answer ✔✔3-5 seconds
In fluoroscopy, the fall-off of brightness at the periphery of the image is called? - correct answer
✔✔vignetting
, An insufficient amount of X-rays at the input phosphor will increase the amount of: - correct answer
✔✔noise
The mA setting commonly utilized during conventional fluoroscopy is: - correct answer ✔✔1 - 5 mA
Which of the following electrical devices within the image intensifier change the level of brightness to
compensate for part thickness and tissue type? - correct answer ✔✔automatic stabilization control
automatic brightness control
When performing a fluoroscopic procedure utilizing an II, proper collimation will reduce: - correct
answer ✔✔noise
Which are distinct advantages of the CCD for fluoroscopy? - correct answer ✔✔higher DQE
small size
flat shape
greater dynamic range
CCDs functions most similar to which of the following? - correct answer ✔✔phosphor of a CR PSP plate
When using the magnification mode in fluoroscopy using an II, which of the following will increase? -
correct answer ✔✔patient exposure
resolution
What is a common size for fluoroscopic CCDs? - correct answer ✔✔1 inch
Because the table is a source of scatter radiation, a ______________ table is commonly used for
dedicated surgical tables that utilize fluoroscopy to decrease dose to the patient and those in the room
during the procedure. - correct answer ✔✔carbon fiber
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