In CBCT technology, the speed with which individual images are acquired is called:

 # In CBCT technology, the speed with which individual images are acquired is called:

A. Running rate

B. Frame rate

C. Projection rate

D. Image rate

The correct answer is B. Frame rate.

The number of images constituting the projection data throughout the scan is determined by the detector frame rate (number of images acquired per second), the completeness of the trajectory arc (180 to 360 degrees), and the rotation speed of the source and detector. The number of basis images making up a single scan set may be fixed or variable. Higher frame rates have both desirable and undesirable effects. Higher frame rates increase the signal-to-noise ratio, producing images with less noise and reducing metallic artifacts. However, a higher frame rate is associated with a longer scan time and higher patient dose. In addition, more data are obtained, and primary reconstruction time is increased.

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