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USAHS Imaging – Questions With Accurate Solutions
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USAHS Imaging – Questions With Accurate Solutions
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USAHS Imaging – Questions With Accurate SolutionsWhen something is ______________ it appears to be black because the X-rays
are able to pass through with little resistance. ✔️Ans - Radiolucent
When something is ___________ it appears to be white/light grey because the
X-rays are blocked. ✔️Ans - Radiodense
When something is _____________ it appears white because no X-rays can pass
through. Examples include metals/ injected dyes. ✔️Ans - Radio-opaque
What is more radio-dense cortical bone or cancellous bone? ✔️Ans -
Cortical
What is more radio-dense bone or muscle? ✔️Ans - Bone
What is more radio-dense muscle or fat? ✔️Ans - Muscle
What is more radio-dense water or fat? ✔️Ans - Water
Short exposure time and low milliamperes on an X-ray _______________
radiodensity. ✔️Ans - Increase
Standard distances from the X-ray tube for the best quality are ____ inches
for skeletal and ____ inches for the chest. ✔️Ans - 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. ✔️Ans - CT
______ does not use radiation. This is the superior method for soft tissue
detail and certain bone pathologies. ✔️Ans - MRI
How does MRI produce images? ✔️Ans - 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. ✔️Ans - Early
, T2 imaging signal is caught ______ emphasizing fluid. ✔️Ans - Late
In a T1 MRI the ______ is bright ✔️Ans - 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?
✔️Ans - If they cortex of the bone is bright it is a CT scan
What is the difference between T1 and T2 weighted images? ✔️Ans -
Time to echo (TE) and time to repetition (TR)
On an MRI cortical bone has a very _____ signal T1 & T2. ✔️Ans - Low
On an MRI red bone marrow has an ____________ signal on T1. ✔️Ans -
Intermediate
On an MRI yellow bone marrow has a _________ signal intensity on T1.
✔️Ans - High
On an MRI bone marrow comes out _______ on T2. ✔️Ans - Dark
On an MRI muscles have an ___________ signal intensity on both T1 and T2;
slightly darker on T2. ✔️Ans - Intermediate
On an MRI tendons/ligs/menisci will have a ______ signal on T1 and T2 if
healthy. ✔️Ans - Low
On an MRI cartilage has an ___________ signal on T1 and T2. ✔️Ans -
Intermediate
A T1 weighted image is made by employing a short TE and TR, fat releases
energy _______ than water therefore fat appears white. ✔️Ans - Faster
In both T1 and T2 dense structures such as cortical bones, tendons, and
ligaments appear _________. ✔️Ans - Dark
In regards to ultrasound, hyperechoic tissues appear _______ than
surrounding tissues. ✔️Ans - Brighter
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