RAD 131 EXAM QUESTIONS & ANSWERS 2024/2025
Fluoroscopy was developed so that radiologists could view ___ images - ANSWERSdynamic
What is the brightness gain of a fluoroscopic image if an image intensification tube has an input phosphor diameter of 24 cm, and output phosphor diameter of 3 cm...
Fluoroscopy was developed so that radiologists could view ___ images - ANSWERSdynamic
What is the brightness gain of a fluoroscopic image if an image intensification tube has an input
phosphor diameter of 24 cm, and output phosphor diameter of 3 cm, and flux gain of 120 -
ANSWERS7680
Variable kVp chart..... If a 6 cm body part is performed at 65kVp @ 6 mAs, what kVp should be used for a
9 cm body part? - ANSWERS71
Fixed kVp chart.... (6cm conversion rule)
If a 17 cm body part is performed at 8o kVp @ 30 mAs, what mAs should be used for 20 cm body part? -
ANSWERS45
What is the milliamperage used during fluoroscopy? - ANSWERSapprox 5 mA
The image intensifier Improved fluoroscopy by increasing image ___ - ANSWERSbrightness
The ability of the eye to detect differences in brightness level is termed ______ - ANSWERScontrast
perception
X-rays that exit the patient and enter the image intensifier first interacts with the ___ - ANSWERSinput
phosphor
The output phosphor of the image intensifier is composed of ___ - ANSWERSzinc cadmium sulfide
The input phosphor converts __ to ___ - ANSWERSx-rays, light
,The ____ in the image intensifier emits electrons when stimulated by light photons -
ANSWERSphotocathode
Electrons hit the ___ after exiting the anode - ANSWERSoutput phosphor
The kinetic energy of photoelectrons in the image intensifier is greatly increased by the ___ -
ANSWERSpotential difference across the tube
Electrons hit the ____ after exiting the anode - ANSWERSoutput phosphor
Fixed kVp ...
If a 17 cm body part is performed at 80 kVp @ 30 mAs, what should be used for a 11 cm body part? -
ANSWERS15
Fixed kVp ...
If a 17 cm body part is performed at 80 kVp @ 70 mAs, what and the same body part of a different
thickness required 35. mAs, what is the thickness of the second body part in cm (highest number of
thickness) - ANSWERS11
What technique chart would be best selection for extremity exams? - ANSWERSvariable kVp
What technique chart would be best suited for Abdomen exam to maintain proper subject contrast -
ANSWERSvariable mAs
Fixed kVp chart...
if a 6 cm body part is performed at 62 kVp @ 6 mAs, what mAs should be used for a 12 cm body part? -
ANSWERS12
Fixed kVp chart...
If a 6 cm body part is performed at 62 kVp @ 6 mAs what mAs should be used for 9 cm body part? -
ANSWERS9
, The ___ is the product of the magnification gain and the flux gain - ANSWERSbrightness gain
Light produced at the output prophase of the image intensifier has been increased ___ times in intensity
- ANSWERS50-75
The ____ is the product of the magnification gain and the flux gain - ANSWERSbrightness gain
The photocathode of the image intensification tube will convert: - ANSWERSvisible light into electrons
The image on the output phosphor of the intensifier tube is - ANSWERS- brighter than the input
phosphor
The fluoro image is brightened and reduced in size by means of: - ANSWERSimage intesifier
What correctly indicates different forms of energy, in progression, that make up the fluoro image as
produced by image intensifier ? - ANSWERSx-ray photons, light photons, electrons, light photons
If an image intensifier tube produces a minification gain of 81 and a flux gain of 50, what is the
brightness gain produced by the image - ANSWERS4050
In fluoro, an image distributor (beam splitter) is used to: - ANSWERSallow both recording and viewing of
the fluoro image at one tiem
The input phosphor of a modern image intensifier is made of: - ANSWERScesium iodide
The crystal utilized in fluoro screen is : - ANSWERScesium iodide
A grainy, mottled appearance in the image of an intensifier tube caused by too few photons striking the
input phosphor - ANSWERSquantum mottle
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Bensuda. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
