Exam 17: Computed Tomography

The actual anatomy being imaged for the CT study is determined by the

The individual credited with inventing the CT scanner is

A tissue that attenuates fewer x-rays than water has a CT number

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

Also known as low contrast resolution, this quality determines the system's ability to distinguish between very similar tissues

Using a larger matrix or thinner slice will reduce the

This is calculated by knowing the dimensions of the pixel and the slice thickness

A CT image typically has a ________________ matrix

This is the most common reconstruction algorithm used in CT.

Which of the following measures mean absorbed dose in the scanned object volume, adjusted for weighted index and pitch in MSCT?

The midpoint of the range of CT numbers to be displayed in the image is the

A tissue that attenuates more x-rays than water has a CT number

The dose notification and alert system is designed to optimize dose and terminates the x-ray exposure if values become too high.

CT examinations currently account for approximately ________ of the U.S. population's radiation exposure resulting from medical procedures

This refers to all the settings that must be determined for a CT imaging study

Which of the following is correct concerning shielding in CT?

Also known as high-contrast resolution, this quality determines the system's ability to distinguish between very different tissue types as they get closer together.

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

The WL should be set

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