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RADT 1085 Fluoroscopy Exam Questions and Answers All Correct

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RADT 1085 Fluoroscopy Exam Questions and Answers All Correct What is vertical resolution? - Answer Number of scan lines that can fit onto screen The horizontal resolution is determined by ______ - Answer the bandpass What is bandpass? - Answer The number of times per sec electron beam ...

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  • September 11, 2024
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  • 2024/2025
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RADT 1085 Fluoroscopy Exam Questions
and Answers All Correct
What is vertical resolution? - Answer ✔ Number of scan lines that can fit onto screen

The horizontal resolution is determined by ______ - Answer ✔ the bandpass

What is bandpass? - Answer ✔ The number of times per sec electron beam can be
modulated

Bandpass is measured in what? - Answer ✔ Hz

A higher bandpass = (increased/decreased) horizontal resolution? - Answer ✔
Increased

Fluoroscopic monitors have a ______ MHz bandpass - Answer ✔ 4.5 MHz

What is the weakest link in the fluoroscopic chain? - Answer ✔ TV monitor

The II itself has a lp/mm of... - Answer ✔ 4-6

The TV monitor has a lp/mm of... - Answer ✔ 2

How many lines per frame for standard U.S. video? - Answer ✔ 525

A photospot camera displays ____ frame(s) at a time with ____ frames/second -
Answer ✔ 1 frame at a time with 12 frames/sec

The photospot camera receives signal from what? - Answer ✔ II output phosphor

Cinefluoroscopy has a _____ pt. dose than even a cassette loaded spot film - Answer ✔
higher

A smaller fluoroscopic film = what? - Answer ✔ larger film format (more images)

A larger film format results in better _____ but increased _______ - Answer ✔ Better
image quality but increased pt. dose

Film rates (?) - Answer ✔ 7.5, 15, 30, 60 fps

, 4 things that result in higher pt. dose (image recording) - Answer ✔ Higher film rates,
smaller FOV, smaller film size, and increased mag

luminescence - Answer ✔ Emission of light in response to outside stimuli

Fluorescence - Answer ✔ Visible light emitted ONLY while phosphor is energized

Phosphorescence - Answer ✔ Phosohor continues to emit light AFTER stimulation

3 negative outcomes that phosphorescence produces in fluoro: - Answer ✔ Afterglow,
image lag, and screen lag

Pulsed progressive fluoroscopy - Answer ✔ No continuous activation of tube - visible
borders on monitor (useful beam does not extend outside II)

Source-skin distance (SSD) - Answer ✔ -Reduces pt entrance skin exposure (ESE)
-15" for fixed fluoroscopes
-12" for mobile

HVL - Answer ✔ 3-4 mm Al equivalent

Cumulative timer - Answer ✔ -Audible alarm reset after 5 min
-Beam on time must be documented

Bucky slot shield must be at least _____ lead equivalent - Answer ✔ 0.25mm

The Bucky slot shield protects occupational workers @ ______ level - Answer ✔
gonadal

Spot film device protective curtain - Answer ✔ -Protects from scatter
-at least 0.25 mm lead

Occupation workers should stand on what side of C arm? - Answer ✔ II side

Space cone of C arm (?) - Answer ✔ 12"

The II housing has a lead equivalency of... - Answer ✔ 2mm

Fluoroscopy ESE rate - Answer ✔ 10 R/min @ 12" SSD
(100 mGy/min)

Cine ESE rate - Answer ✔ 20 R/min @ 12" SSD
(200 mGy/min)

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