CAMRT Practice Exam 1
You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part should you expect to x-ray? - (correct answer) Feet
What formula is used to calculate mAs when SID has been altered? - (correct answer) Old mAs/new mAs = old SID squared/new SID squared...
You receive a req on a 1yr old who is Dx with Talipes equinovarus. What body part should you expect to
x-ray? - (correct answer) Feet
What formula is used to calculate mAs when SID has been altered? - (correct 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? - (correct answer) Photoelectric
What is an advantage of CT over conventional radiography? - (correct answer) Improved soft tissue
differentiation
Absorbed dose. Which is the most radiosensitive portion of the cell cycle? - (correct answer) Mitosis
Millie is a tech. What is the maximum annual permissible whole body dose that can be registered on her
OSL? - (correct answer) 20mSv
What is the term used to describe breaks in chromosomes? - (correct answer) Aberrations
In digital imaging, what is the relationship between the matrix and spatial resolution? - (correct answer)
Direct
What OID is required to optimize the air gap technique? - (correct 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? - (correct 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? - (correct 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? - (correct 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? - (correct answer) Lateral decub with AP horizontal beam
What should be included in an image looking for ulcerative colitis? - (correct answer) Rectosigmoid area
T2/3 is at what level? - (correct answer) Sternal notch
In an indirect capture digital unit, what is the function of the scintillation phosphor coating on a
photodiode? - (correct answer) Cesium iodide is used to convert x-rays to light
What is the relationship between the kV and half value layer? - (correct 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
-Coned view of odontoid - (correct answer) T, T, F
On which apparatus would a stationary grid be acceptable? - (correct answer) a. Cystoscopy table
b. Angio unit
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