Ch. 10 Magnetic Resonance Imaging Hardware

This precision of patient couch is obtained with specialty gears and electronic registers. Each revolution of the smallest drive gear corresponds to a _______________movement of the couch.

Reducing slice thickness ________________the spatial resolution by reducing partial volume effects.

Increasing ______________lengthens the scan time. however, with longer _________________, more slices per scan are possible with multislice pulse sequence techniques

Shim coils were positioned to make the Bo field__________.

The rings of resistive magnet. These rings each contain a coil of wire conducting a large electrical current, approximately_____________________

For computing FFT. A floating-point operation, such as a real multiplication, is referred to as a ___________.

_____________________are switched on and off rapidly. This current switching results in the conductors heating and expanding, and these cause the thumping sound.

There are three secondary magnetic coils, and they are dependent on each other.

Usually the shim coils were at room temperature, abut in advanced MRI systems, they were in the cryostate.

The gantry of a superconducting MRI system can be considered to have three subassemblies, which one of the following is NOT one the subassemblies.

The massive size is due principally to the requirement of maintaining the primary magnetic coils at

Which of the following types does not have shimm coil built in the gantry?

In the gantry structure, nearest to the patient is the _______

The patient couch should be able to accept patients who weigh up ___________at near floor level

Which one of the following primary magnet assembly is visible?