Which of the following adjustments will shorten scan time in an MR pulse sequence?

The selected option effectively shortens scan time in an MR pulse sequence through several key adjustments.

Decreasing the repetition time (TR) reduces the time between successive pulse sequences, allowing multiple scans to be completed more quickly. By enabling half-fourier imaging, which acquires only a portion of k-space data, the overall scan time is also significantly reduced while still maintaining image quality—this can be particularly advantageous in clinical settings where time efficiency is critical. Additionally, increasing the parallel imaging factor allows for faster data acquisition by using multiple coils to collect data simultaneously, further shortening the total scan time.

These adjustments are commonly employed in MRI to optimize scan protocols for different clinical requirements, and understanding their impacts is crucial for improving workflow and patient comfort during imaging procedures.