CAMRT Prep Exam Questions WITH ALL CORRECT ANSWERS

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 Portosystemi