Exam 29: Computed Tomography

Dose in CT is considered to be:

Contrast is adjusted by windowing, changing window width and window level. Window level determines the:

The advantages of multislice helical CT (MSHCT) include: 1)multiphase studies. 2)isotropic viewing. 3)longer anatomic coverage.

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

All of the following are methods of 3D reconstruction techniques in CT except:

An array of numbers arranged in a grid of rows and columns is called a:

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

Contrast is adjusted by windowing, changing window width and window level. Window width determines the:

Fourth-generation CT scanners use the following configuration:

The reference material for CT is _____ and is related to the _____ of the tissue.

Oral contrast for CT should be mixed so it is:

The CT system's ability to freeze any motion of a scanned object is termed:

Factors that affect image quality in CT consist of: 1)spatial resolution. 2)noise. 3)contrast media.

The most significant geometric factor that contributes to spatial resolution is:

The measured x-ray transmission values are called:

CT detectors are most commonly _____ detectors.