6TH GENERATION CT SCANNER

"Helical/Spiral Computed Tomography"

6TH Gen CT Scanner is also referred to as?

slip ring connection technology

Helical scanners were made possible by advances in ?

Slip rings consist of brushes that fit into grooves that permit the current and voltage to the x-ray tube to be supplied while the tube is in continuous rotation around the gantry.

What is Slip Ring?

TRUE

Slip Ring (?) This permits scanning of the entire body in a helical pattern without stopping the tube.

continuous helical scan of the patient is acquired

When the patient table is moved slowly during the x-ray exposure while the tube is in continuous rotation, data comprising a ?

misnomer

The term “spiral" is a ?

Spiral (definition)

A __________is a circular motion with a decreasing or increasing diameter.

helix form

The actual scanning motion has a set circular diameter, which is a?.

spiral motion

The data is acquired in a helical, not ?

much shorter total scan time

The primary advantage of the Helical scanning is a________________ (30-40 seconds for the entire abdomen.

This in turn permits the use of less contrast media.

motion artifacts

Another advantage is that for many patients the entire examination can be completed in one breath hold, eliminating overlaps and missed areas due to variations in the amount of air in the lungs between scan sections

This also reduces the possibility of ?