CT Basics 2.0 | Module 2: Principles, Parameters and Display Test

Using a wider display field of view results in: A) reduced noise. B) improved spatial resolution. C) anatomy appearing larger. D) increased patient dose.

A) reduced noise.

The number of detectors the scanner uses to collect data for a particular scan is determined by the: A) scan field of view. B) display field of view. C) pitch. D) slice thickness.

A) scan field of view.

The largest piece of the CT device is called: A) the gantry. B) the processor. C) the housing. D) the ring.

A) the gantry.

The first generation CT scan pattern was called _______ acquisition. A) translate and rotate B) step-and-shoot C) helical D) linear

A) translate and rotate

Which component of the CT gantry supplies electrical power to the x-ray tube and transfers the signals from the detectors to the computer? A) Generator B) Slip rings C) Photomultiplier D) Data acquisition system

B) Slip rings

An increase in pitch also results in increased: A) patient dose. B) scan speed. C) image quality. D) scan length.

B) scan speed.

The depth of a voxel is determined by the: A) field of view. B) slice thickness. C) matrix size. D) pixel size.

B) slice thickness.

When considering detector efficiency, the measure of how consistently the detectors respond is called: A) capture efficiency. B) absorption efficiency. C) stability. D) response time.

C) stability.

The range of CT numbers displayed in the reconstructed image is controlled by: A) subject contrast. B) inherent contrast. C) window width. D) window level.

C) window width.

Which of the following is false regarding conventional axial scanning compared to helical scanning? A) Axial scanning requires more contrast media. B) Axial scanning has greater potential for misalignment between scans. C) Axial scanning is more sensitive to patient motion. D) Axial scanning results in poorer image quality.

D) Axial scanning results in poorer image quality.