Question

Increasing PI reduction factor will do what to DWI susceptibility artifacts?

1) Increase the artifacts
2) Decrease the artifacts
3) Have no effect on the artifacts
4) Cannot be determined

Answer 1

Increasing the PI reduction factor decreases DWI susceptibility artifacts by shortening scan time and speeding up the gradient echo readout, with a trade-off of potentially reducing SNR. Water quality typically decreases with use due to contamination.

Step-by-step explanation:

When the Parallel Imaging Reduction (PI reduction) factor is increased, it has the effect of decreasing Diffusion Weighted Imaging (DWI) susceptibility artifacts. By increasing the PI reduction factor, the scan time is shortened and the gradient echo readout is made faster, which reduces the opportunity for susceptibility artifacts to form. However, it is important to note that increasing the PI reduction factor can reduce signal-to-noise ratio (SNR), so there is a trade-off that must be carefully managed in clinical practice.

Water quality is typically decreased when we use water because contaminants from various sources may be introduced during the use. This is especially the case in industrial or agricultural applications, where water may become tainted with chemicals, waste products, or other pollutants.