Compared with conventional computed tomography scanners, slip-ring scanners offer the following advantage(s):I. removal of cable wraparoundII. elimination of start-stop actionIII. continuous rotation of x-ray tube and minimal interscan delays

Select the proper sequence of CT numbers (HUs) for the following tissues, from lowest HU to the highest HU:

Streak artifacts arising from the dense petrous bones is a result of _____

Which of the following controls the contrast of the computed tomography image?

What shape of beam was utilized in first-generation CT?

The midpoint of the range of computed tomography or houndsfield numbers is called the:

The window width and window level settings for a given examination of the abdomen are 700 and 100 respectively. Which of the following is true?

The purpose of collimation in computed tomography is:I. to protect the patientII. to ensure a constant beam width at the detectorIII. to reduce scatter radiation

A ______ window width indicates that there is a relatively long gray scale.

The purpose of the imaging system is to:I. produce x raysII. shape and filter the x rayIII. detect and measure the radiation passing through the cross-section