Key Questions - Imaging Techniques

What is the principle behind MRI?
What is aliasing?
What is the optimal Doppler angle?
Define anechoic
What is attenuation?
What is the primary difference between ultrasound imaging and other imaging?
How are MRAs and MRVs created?
On T2-weighted imaging, which tissues are high signal (i.e., bright?
On T1-weighted imaging, which tissues are low-signal (i.e., dark)
On T1-weighted imaging, which tissues are high signal (i.e., bright)
How is signal intensity related to TR and TE in a spin-echo sequence?
What happens to the signal intensity when the TE is increased?
What happens to the signal intensity when the TR is increased?
Which organ is the most radiosensitive?
What is the rationale for DEXA study?
For CT, what is meant by the level?
For CT, what is meant by the window?
Holding all else fixed, how will increased patient thickness affect the number of x-rays detected by the receptor in radiography?
For a given tube voltage and current, name five factors that affect the patient's dose in radiography.
How is the in-plane pixel size (d) related to the FOV and the digital matrix size (N)?
What factors should one consider concerning the risk to the fetus from a CT of the maternal chest or abdomen?
Do multiple short exposures have the same effect as a single dose over the same total exposure time?
How does the amount of radiation change as you move away from the x-ray source?
List five ways of reducing secondary radiation.
List five ways of reducing primary radiation.