CAMRT Prep Exam Questions WITH ALL CORRECT ANSWER

CAMRT Prep Exam Questions WITH
ALL CORRECT ANSWERS
The exposure from an x-ray tube operated at 70kV @ 200mAs is 400mR @ 90cm.
What will be the exposure at 180cm? - ANSWER- i2 = i1 x d1^2/d2^2
i2 = 400 x 90^2/180^2
i2 = 400 x 8100/32400
i2 = 400 x 0.25
i2 = 100mR
OR
I1/I2=((d2)/(d1))^2
I1=12 ((d2))/(d1)))^2
I1= 400mR ((90)/(180))^2
I1= 400 (1/2)^2
I1= 400(1/4)
I1 = 100mR
What does ERCP stand for and why is it done? - ANSWER- Endoscopic Retrograde
Cholangiopancreatography
- it is done to diagnose biliary and pancreatic pathologic conditions
SC35 light field and x-ray field alignment must not exceed _____% - ANSWER- 2
What is orthostatic hypotension? - ANSWER- Low blood pressure due to standing
upright
Germicide vs. Disinfectant? - ANSWER- A germicide is a solution that destroys
microorganisms; a disinfectant is any substance that inhibits the growth of bacteria.
A disinfectant is a type of germicide.
Lauenstein vs. X-table? - ANSWER- Lauenstein: lesser trochanter is in profile medially
and the femoral neck superimposes the greater trochanter
X-table: the femoral neck is demonstrated without overlap from the greater trochanter. A
small amount of the lesser trochanter is visible on the posterior surface of the femur.
What does pneumbra effect? - ANSWER- Recorded detail
What is the line focus principle? - ANSWER- Through angling the target, the effective
area of the target is made much smaller than the actual area of the electron interaction
The pedicles sit too far posterior on the vertebral bodies for an oblique l-spine, so
therefore the patient is _________ rotated - ANSWER- Over
What is the purpose and position of a CVP line? - ANSWER- It is used for measuring
central venous pressure as well as allowing nutrients and fluids to be administered. The
best location for this line is in the brachiocephalic vein at the junction of the SVC, or
actually within the SVC itself.
What is the purpose and position of a Swan-Ganz catheter? - ANSWER- Measure
wedge pressure, central venous pressure, systolic, diastolic, and mean pressure;
withdraw blood samples; give fluid or inject drugs.
It is located in the right or left pulmonary artery.
3 layers of meninges - ANSWER- Dura mater, Arachnoid mater, Pia mater
What is the pixel value for a detector of 18? - ANSWER- 2^18 = 262,144
The pixel value formula is 2^x, where x is the number given
Which vessel ascends through the cervical transverse foramina? - ANSWER- Vertebral
Artery
What 3 vessels provide oxygenated blood to the heart? - ANSWER- The left and right
coronary arteries, and the circumflex artery
What is the Seldinger technique? - ANSWER- The method used to safely introduce a
catheter and guide wire into a blood vessel
Which mammography view requires the pectoral muscle on the posterior edge of the
breast, retromammary tissue, and the nipple in profile? - ANSWER- Craniocaudal View
What is normal blood pressure? - ANSWER- 110-120mmHg systolic/60-80mmHg
diastolic
If the SID is 40", the SOD is 38", and the OID is 2"; what is the magnification factor? -
ANSWER- M=SID/SOD
M=40/38
M=1.05
What kV is used in mammo? - ANSWER- Approximately 25-30kV
What is the centering for an abdominal aortography exam? - ANSWER- Perpendicular
to the level of L2
What is the injection site for a cerebral angiogram? - ANSWER- Either direct
percutaneous method of the common carotid, or catheterization of the femoral artery
What procedure is done in radiology to relive the symptoms of atherosclerosis? -
ANSWER- Angioplasty; vascular stenting; thrombolysis
What angle is used for an AP simoid image? - ANSWER- 35 degrees cephalad
The cervical spine is being examined on a supine patient. The patient is in RPO position
with the CR angled 15-20 degrees cephalad. What is best demonstrated? - ANSWERThe left intervertebral foramina and pedicles
What is ACE? - ANSWER- Anterior Rim, Closed Obturator Foramen, External Rotation
(the ilioischial columns are demonstrated)
What is POI? - ANSWER- Posterior Rim, Open Obturator Foramen, Internal Rotation
(the iliopubic columns are demonstrated)
What vertebral level do the kidneys sit at? - ANSWER- Between T11-L3
What does TIPS stand for and what is its purpose? - ANSWER- Transjugular
Intrahepatic Portosystemic Shunt.
The purpose is to decrease portal hypertension and the associated variceal bleeding by
allowing the portal venous circulatio