Exam 16: Computed Tomography

This CT scanner took approximately 30 seconds to produce a single image.

The DAS receives an electrical signal from the detector-photodiode.

Today's CT scanner has a detector array with a certain number of rows (4,16,64,etc. ),each with approximately _____________ detectors.

Slices of anatomy that go from head to foot are:

This artifact is specific to third-generation scanners.

The image data is the:

The beam-hardening artifact can be reduced by:

Using a larger matrix or thinner slice will reduce the:

The individual credited with inventing the CT scanner is:

Determining the CT numbers that will be visible in the image is:

Based on the Hounsfield scale,the CT number of bone is approximately:

The Z axis for CT scanning goes from:

An image with a WW of 600 and a WL of -300 produces an image that displays pixels with CT numbers ranging from:

The DAS will:

The number of CT numbers visible in the CT image is determined by the:

A pitch of 2 indicates that with each rotation of the tube:

EBCT scanners are the only scanners that are fast enough to image the heart.

The transmission value for a single detector is a:

The device that absorbs the radiation and produces an electrical signal is the:

This is the most common reconstruction algorithm used in CT.