As field of view is reduced with tighter collimation,
1. image will become brighter
2. image will not become brighter
3. image quality will be improved
4. image quality will be reduced
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2 and 3
The intensity of the x-ray beam at the tabletop of a fluoroscope should not exceed
______ of operating tube current at a setting of 80 kVp
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, 2.2 rads/min for each mA
When AERC is used, the useful beam exposure rate shall be measured with a
phantom equivalent to ____ inches of lucite or _____ inches of water to simulate a patient
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7-7*7/8 inches of Lucite; 9 inches of water
A (low, high) SNR will result in a loss of contrast resolution
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low
Fluoroscopic exposures should be "on" and then "off" as compared to a "continuous
on" time as doubling the exposure time will (increase, double, or triple) radiation dose
to the patient and operator.
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double
Conventional (older) fluoroscopy uses __________ or night vision while image intensified
fluoroscopy uses ___________ or daylight vision.
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scotopic; photopic
(T/F) DAP and KAP assesses the absorbed dose risk of an exam compared with the
area irradiated.
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False, only DAP does this
Resolution with cesium iodide tubes is __ lp/mm
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4 lp/mm
Pulsed fluoroscopy uses short bursts of radiation (<5 msec or less) to significantly
(increase, reduce) exposure to the patient and personnel in the x-ray room.
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Reduce
The cumulative manual-reset timer may not exceed _______ minutes
1. image will become brighter
2. image will not become brighter
3. image quality will be improved
4. image quality will be reduced
Give this one a try later!
2 and 3
The intensity of the x-ray beam at the tabletop of a fluoroscope should not exceed
______ of operating tube current at a setting of 80 kVp
Give this one a try later!
, 2.2 rads/min for each mA
When AERC is used, the useful beam exposure rate shall be measured with a
phantom equivalent to ____ inches of lucite or _____ inches of water to simulate a patient
Give this one a try later!
7-7*7/8 inches of Lucite; 9 inches of water
A (low, high) SNR will result in a loss of contrast resolution
Give this one a try later!
low
Fluoroscopic exposures should be "on" and then "off" as compared to a "continuous
on" time as doubling the exposure time will (increase, double, or triple) radiation dose
to the patient and operator.
Give this one a try later!
double
Conventional (older) fluoroscopy uses __________ or night vision while image intensified
fluoroscopy uses ___________ or daylight vision.
, Give this one a try later!
scotopic; photopic
(T/F) DAP and KAP assesses the absorbed dose risk of an exam compared with the
area irradiated.
Give this one a try later!
False, only DAP does this
Resolution with cesium iodide tubes is __ lp/mm
Give this one a try later!
4 lp/mm
Pulsed fluoroscopy uses short bursts of radiation (<5 msec or less) to significantly
(increase, reduce) exposure to the patient and personnel in the x-ray room.
Give this one a try later!
Reduce
The cumulative manual-reset timer may not exceed _______ minutes
