Question

If a phase resolution (Sharpness part of matrix) of 256 is desired, how many times does the TR period (time from the initial 90 pulse to the next 90 pulse) have to be repeated

A) 256
B) 128
C) 64
D) 32

Answer 1

In MRI imaging, if a phase resolution of 256 is required, the TR period must be repeated 256 times, with each repetition corresponding to one phase encoding step to create the complete image.

Step-by-step explanation:

The student's question pertains to magnetic resonance imaging (MRI), which is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. When discussing the phase resolution in MRI, it is about the detail of the image in the phase encoding direction. The phase resolution, which is sometimes specified as part of the matrix size, indicates how many phase encoding steps are needed. If a phase resolution of 256 is desired, then the TR period must be repeated 256 times. Each TR period corresponds to one phase encoding step, and since the desired phase resolution is 256, you need 256 repetitions to build the complete image.