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

Calculate the pitch for a MDCT scan with the following parameters: 128 slice MDCT, 1.25 mm slice thickness, table movement of 80 mm per rotation.

The principal disadvantage of a larger CT image matrix is….

What are pixels in a digital image representing the information contained in a volume of tissue in the patient are referred to as? 

Which of the following describes the beam that diverges from the x-ray tube to the outer edges of the detectors on a multi-detector CT scanner?