Intro to CT review

Front

Which generation of CT scanners introduced a fan-shaped beam, where the detector array and the tube rotate around the patient to obtain information?

Back

3rd

Front

Which generation of scanners has stationary detectors located around the entire gantry and the tube rotates around the patient to obtain the image?

Back

4th

Front

What type of CT detector is most efficient because it can receive x-rays coming in from various angles?

Back

Solid State Crystal/ Scintillation

Front

Radiographic tomography was invented in ____, and CT was invented in ____.

Back

1921; 1971

Front

Name the collimator that stops scatter radiation from reaching the CT detector.

Back

post- patient

Front

How can the fulcrum be adjusted for tomography?

Back

Up and down from the level of the table

Front

What is the HU of water?

Back

0 Hounsfield Units

Front

The HU of air is ____, and the HU of compact bone is ____.

Back

-1,000; 1,000

Front

What term describes the center of the HU values and defines the area of interest for that particular scan?

Back

window level

Front

What type of resolution is described as being able to distinguish between structures with similar densities?

Back

contrast