Computed Tomography for Technologists 2nd Edition Exam Newest With complete solution Updated 
Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT
examination?
A. Topogram
B. Scout
C. Scanogram
D. Spiral - D. Spiral
The ability of a system to differentiate, on the image, objects with similar densities is
known as:
A. High contrast resolution
B. Low contrast resolution
C. Spatial resolution
D. Temporal resolution - B. Low contrast resolution
Each two dimensional square of data that make up the CT image is called a:
A. Pixel
B. Voxel
C. Matrix
D. Fragment - A. Pixel
How many pixels are contained in a 1,024 matrix image? A. 1,024
B. 2,048
C. 262,144
D. 1,048,576 - D. 1,048,576
Beam attenuation can be defined as:
A. The phenomenon by which artifacts result when lower energy photons are
preferentially absorbed, leaving only higher-intensity photons to strike the detector array.
B. Xray energy that is produced from bombarding a substance with fast moving
electrons.
C. The ability of the detector to capture transmitted photons and change them to
electronic signals.
D. The phenomenon by which an xray beam passing through a structure is decreased in
intensity or amount because of absorption and interaction with matter. - D. The
phenomenon by which an xray beam passing through a structure is decreased in
intensity or amount because of absorption and interaction with matter.
Which of the following is a low attenuation structure:
A. Iodine filled aorta
B. Rib
C. Trachea
D. Calcified arteries - C. Trachea