Exam 28: Computed Tomography

The pixel size is reduced when the _______ size is increased and the _____________ size is fixed.

The new development in the fourth-generation CT scanner is the ________________.

Each sweep of the source-detector around the body during CT is called a __________.

The concentration of scintillation detectors affects the ___________ of the CT image.

The first generation of computed tomography used ______ detector(s).

The degree of spatial resolution in any CT imaging system is limited to the size of the ___________.

The reduction in ____________ was the principal advantage of the second-generation CT scanners.

The CT scanner must be calibrated so that ____________ is at CT number zero.

The patient dose in CT is determined by the ________________ collimator.

The principal drawback of the first-generation CT scanner was the _______________.

Filtered back projection in CT refers to ___________________.

Each CT projection is ______________________.

Many CT x-ray tubes have the capacity for millions of _________ with each exam.

The time from the end of CT imaging to image appearance is called the ______ time.

Each CT projection records variations in _________________________.

What is the principal disadvantage of third-generation CT scanners?

A high variation in pixel values in a homogeneous phantom is a measure of ________.

Image noise in CT scanning depends on _______________________.

The cross-sectional anatomy is translated into ___________ during CT reconstruction.

CT scanners operate on ________________ voltage generation.