CAMRT Practice Exam 1 2025
Questions and Answers
You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part
should you expect to x-ray? - ✔✔Feet
What formula is used to calculate mAs when SID has been altered? - ✔✔Old mAs/new
mAs = old SID squared/new SID squared
When doing single contrast barium enemas, what is the predominant type of electron
interaction occurring in the patient? - ✔✔Photoelectric
What is an advantage of CT over conventional radiography? - ✔✔Improved soft tissue
differentiation
Absorbed dose. Which is the most radiosensitive portion of the cell cycle? - ✔✔Mitosis
Millie is a tech. What is the maximum annual permissible whole body dose that can be
registered on her OSL? - ✔✔20mSv
What is the term used to describe breaks in chromosomes? - ✔✔Aberrations
In digital imaging, what is the relationship between the matrix and spatial resolution? -
✔✔Direct
What OID is required to optimize the air gap technique? - ✔✔10-15cm
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
, When reviewing previous images from a patient having a barium meal study, which
exam would it be most important to bring to the attention of the radiologist? - ✔✔*a.
Barium enema done 2 days ago
b. IVP done earlier that day
c. Endoscopy without biopsy done 1hr ago
d. CT chest booked immediately following
100cm SID changes to 120cm SID, original mAs was 5mAs. What is the new mAs? -
✔✔7.2
Need to do a femur series on a 17 year old female. When asked if she could be pregnant
she says "I don't know i might be". What do you do? - ✔✔Determine if pt is in the 10-
day period after onset of menstruation
An elderly woman unable to lay on her back or stand needs lumbar spine x-rays.
Besides a routine lateral, what view should you consider? - ✔✔Lateral decub with AP
horizontal beam
What should be included in an image looking for ulcerative colitis? - ✔✔Rectosigmoid
area
T2/3 is at what level? - ✔✔Sternal notch
In an indirect capture digital unit, what is the function of the scintillation phosphor
coating on a photodiode? - ✔✔Cesium iodide is used to convert x-rays to light
What is the relationship between the kV and half value layer? - ✔✔As kV increases, the
HVL decreases
T or F to indicate when you would choose to increase the SID from the dept standard
-Upright abdomen on a large pt
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
Questions and Answers
You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part
should you expect to x-ray? - ✔✔Feet
What formula is used to calculate mAs when SID has been altered? - ✔✔Old mAs/new
mAs = old SID squared/new SID squared
When doing single contrast barium enemas, what is the predominant type of electron
interaction occurring in the patient? - ✔✔Photoelectric
What is an advantage of CT over conventional radiography? - ✔✔Improved soft tissue
differentiation
Absorbed dose. Which is the most radiosensitive portion of the cell cycle? - ✔✔Mitosis
Millie is a tech. What is the maximum annual permissible whole body dose that can be
registered on her OSL? - ✔✔20mSv
What is the term used to describe breaks in chromosomes? - ✔✔Aberrations
In digital imaging, what is the relationship between the matrix and spatial resolution? -
✔✔Direct
What OID is required to optimize the air gap technique? - ✔✔10-15cm
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
, When reviewing previous images from a patient having a barium meal study, which
exam would it be most important to bring to the attention of the radiologist? - ✔✔*a.
Barium enema done 2 days ago
b. IVP done earlier that day
c. Endoscopy without biopsy done 1hr ago
d. CT chest booked immediately following
100cm SID changes to 120cm SID, original mAs was 5mAs. What is the new mAs? -
✔✔7.2
Need to do a femur series on a 17 year old female. When asked if she could be pregnant
she says "I don't know i might be". What do you do? - ✔✔Determine if pt is in the 10-
day period after onset of menstruation
An elderly woman unable to lay on her back or stand needs lumbar spine x-rays.
Besides a routine lateral, what view should you consider? - ✔✔Lateral decub with AP
horizontal beam
What should be included in an image looking for ulcerative colitis? - ✔✔Rectosigmoid
area
T2/3 is at what level? - ✔✔Sternal notch
In an indirect capture digital unit, what is the function of the scintillation phosphor
coating on a photodiode? - ✔✔Cesium iodide is used to convert x-rays to light
What is the relationship between the kV and half value layer? - ✔✔As kV increases, the
HVL decreases
T or F to indicate when you would choose to increase the SID from the dept standard
-Upright abdomen on a large pt
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
