CAMRT Practice Exam 1 Questions & Answers
You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part should you expect to x-ray? - ACCURATE ANSWER-Feet
What formula is used to calculate mAs when SID has been altered? - ACCURATE ANSWER-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? - ACCURATE ANSWER-Photoelectric
What is an advantage of CT over conventional radiography? - ACCURATE ANSWER-
Improved soft tissue differentiation
Absorbed dose. Which is the most radiosensitive portion of the cell cycle? - ACCURATE
ANSWER-Mitosis
Millie is a tech. What is the maximum annual permissible whole body dose that can be registered on her OSL? - ACCURATE ANSWER-20mSv
What is the term used to describe breaks in chromosomes? - ACCURATE ANSWER-
Aberrations
In digital imaging, what is the relationship between the matrix and spatial resolution? - ACCURATE ANSWER-Direct
What OID is required to optimize the air gap technique? - ACCURATE ANSWER-10-
15cm 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? - ACCURATE ANSWER-*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? - ACCURATE ANSWER-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? - ACCURATE ANSWER-
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? - ACCURATE ANSWER-
Lateral decub with AP horizontal beam
What should be included in an image looking for ulcerative colitis? - ACCURATE ANSWER-Rectosigmoid area
T2/3 is at what level? - ACCURATE ANSWER-Sternal notch
In an indirect capture digital unit, what is the function of the scintillation phosphor coating on a photodiode? - ACCURATE ANSWER-Cesium iodide is used to convert x-
rays to light
What is the relationship between the kV and half value layer? - ACCURATE ANSWER-
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 -Long bones to include both jts
You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part should you expect to x-ray? - ACCURATE ANSWER-Feet
What formula is used to calculate mAs when SID has been altered? - ACCURATE ANSWER-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? - ACCURATE ANSWER-Photoelectric
What is an advantage of CT over conventional radiography? - ACCURATE ANSWER-
Improved soft tissue differentiation
Absorbed dose. Which is the most radiosensitive portion of the cell cycle? - ACCURATE
ANSWER-Mitosis
Millie is a tech. What is the maximum annual permissible whole body dose that can be registered on her OSL? - ACCURATE ANSWER-20mSv
What is the term used to describe breaks in chromosomes? - ACCURATE ANSWER-
Aberrations
In digital imaging, what is the relationship between the matrix and spatial resolution? - ACCURATE ANSWER-Direct
What OID is required to optimize the air gap technique? - ACCURATE ANSWER-10-
15cm 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? - ACCURATE ANSWER-*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? - ACCURATE ANSWER-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? - ACCURATE ANSWER-
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? - ACCURATE ANSWER-
Lateral decub with AP horizontal beam
What should be included in an image looking for ulcerative colitis? - ACCURATE ANSWER-Rectosigmoid area
T2/3 is at what level? - ACCURATE ANSWER-Sternal notch
In an indirect capture digital unit, what is the function of the scintillation phosphor coating on a photodiode? - ACCURATE ANSWER-Cesium iodide is used to convert x-
rays to light
What is the relationship between the kV and half value layer? - ACCURATE ANSWER-
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 -Long bones to include both jts
