USAHS imaging Exam Questions and Answers 100% Pass

USAHS imaging Exam Questions and Answers 100% Pass When something is ______________ it appears to be black because the X-rays are able to pass through with little resistance. - Answer- Radiolucent When something is ___________ it appears to be white/light grey because the X-rays are blocked. - Answer- Radiodense When something is _____________ it appears white because no X-rays can pass through. Examples include metals/ injected dyes. - Answer- Radio-opaque What is more radio-dense cortical bone or cancellous bone? - Answer- Cortical What is more radio-dense bone or muscle? - Answer- Bone What is more radio-dense muscle or fat? - Answer- Muscle What is more radio-dense water or fat? - Answer- Water Short exposure time and low milliamperes on an X-ray _______________ radiodensity. - Answer- Increase Standard distances from the X-ray tube for the best quality are ____ inches for skeletal and ____ inches for the chest. - Answer- 40, 72 ______ is the modality of choice for viewing bone, the best for evaluating loose bodies and subtle/complex fractures. Also the best for the evaluation of spinal degeneration. - Answer- CT ______ does not use radiation. This is the superior method for soft tissue detail and certain bone pathologies. - Answer- MRI How does MRI produce images? - Answer- From the emission of energy from the protons in the body (NOT from the absorption of X-rays) T1 imaging signal is caught ______ emphasizing fat. - Answer- Early T2 imaging signal is caught ______ emphasizing fluid. - Answer- Late In a T1 MRI the ______ is bright - Answer- Fat (in T2 the fluid is bright) How can you use the cortex of a bone to determine if it is a CT scan or MRI? - Answer- If they cortex of the bone is bright it is a CT scan What is the difference between T1 and T2 weighted images? - Answer- Time to echo (TE) and time to repetition (TR) On an MRI cortical bone has a very _____ signal T1 & T2. - Answer- Low On an MRI red bone marrow has an ____________ signal on T1. - Answer- Intermediate On an MRI yellow bone marrow has a _________ signal intensity on T1. - Answer- High On an MRI bone marrow comes out _______ on T2. - Answer- Dark On an MRI muscles have an ___________ signal intensity on both T1 and T2; slightly darker on T2. - Answer- Intermediate On an MRI tendons/ligs/menisci will have a ______ signal on T1 and T2 if healthy. - Answer- Low On an MRI cartilage has an ___________ signal on T1 and T2. - Answer- Interm