Advanced Imaging Study Guide 1

Question 1

List factors that affect image quality in CT

Answer 1

Spatial Resolution, Contrast Resolution, Temporal Resolution, Noise, Artifacts

Question 2

CT is able to differentiate between tissues with similar densities compared to conventional radiography because of improved

Answer 2

Contrast Resolution

Question 3

Which imaging examination is usually preformed immediately after a Myelogram?

Answer 3

CT

Question 4

The position of the patient’s head during myelography to prevent contrast from passing into cerebral ventricles is

Answer 4

Acute Extension

Question 5

The most common reporting method of dose reporting on the present CT scanners is

Answer 5

Dose-Length Product

Question 6

The midpoint or center of the number of densities being viewed in a selected window on CT is the

Answer 6

Window Level

Question 7

CT scanning permitting data that can easily be reformatted to produce multiplanes (coronal and sagittal)is accomplished by

Answer 7

Helical Scanning

Question 8

Where is the contrast medium injected for a myelogram?

Answer 8

L2-L3, L3-L4

Question 9

List the methods/names of the 3D reconstruction techniques used in CT

Answer 9

Maximum intensity projection, Shaded surface display, Volume Rendering

Question 10

The reference material for CT is,_______ and is related to the ____________ of the tissue.

Answer 10

Water, Linear attenuation coefficient

Question 11

List the names of post-processing techniques used in CT

Answer 11

MIP, SSD, VR

Question 12

Window width in CT controls

Answer 12

Grey Scale

Question 13

The attenuation of a specific tissue relative to water is called the

Answer 13

CT number/ Hounsfield Unit

Question 14

Dose in CT considered to be dependent on patient

Answer 14

Size

Question 15

The measured x-ray transmission values in CT are called

Answer 15

Raw Data