Exam 11: Single-Slice Spiralhelical Computed Tomography: Physical Principles and Instrumentation

What term describes how thick a section is imaged and to what extent details within the section contribute to the signal?

The time it takes to accomplish steps 1, 3, and 4 in the scanning sequence for a conventional computed tomography scanner is called the:

Even with slip-ring technology, long high-tension cables are needed for data transfer.

New capabilities created as a result of the creation of spiral/helical computed tomography include: I. real-time computed tomography fluoroscopy II. computed tomography angiography III. computed tomography endoscopy

The first step in volume scanning is analog to digital conversion.

What is the ideal pitch in spiral/helical computed tomography?

What year was the first computed tomography scanner able to perform volume data acquisition introduced?

Which of the following are reasons that patient dose is less in single-slice spiral/helical computed tomography compared with conventional computed tomography? I. tube currents are set to lower values II. spiral/helical computed tomography largely eliminates the need to retake single scans III. spiral/helical computed tomography can use a pitch of less than 1

Comparison studies have shown that the dose in conventional computed tomography is about equal to that of spiral/helical computed tomography.

All of the following affect noise in spiral/helical computed tomography except: