Magnetic Resonance Imaging (MRI) Practice Test

What technique is used to reduce MRI scan time utilizing an array coil?

1. Turbo imaging

2. Parallel imaging

3. 3D reconstruction

4. Gradient echo sequencing

The correct answer is: Parallel imaging

The technique that effectively reduces MRI scan time by utilizing an array coil is parallel imaging. This method takes advantage of the multiple sensitivity profiles provided by an array of coils positioned around the patient. By collecting data from these coils simultaneously, parallel imaging enables quicker imaging by undersampling the data acquired, which reduces the overall scan time. The mathematical algorithms used in parallel imaging reconstruct full images from this undersampled data while minimizing artifacts that could arise from the faster acquisition. Using parallel imaging not only speeds up the scanning process but also helps in reducing motion artifacts, as patients often have difficulty remaining completely still for long periods. Thus, this technique is particularly beneficial in clinical settings, improving patient comfort and workflow efficiency.