Magnetic Resonance Imaging (MRI) Practice Test

What is the purpose of a calibration scan in parallel imaging?

1. To enhance image resolution

2. To assess patient safety

3. To determine optimal imaging parameters

4. To map out image artifacts

The correct answer is: To determine optimal imaging parameters

The purpose of a calibration scan in parallel imaging is to determine optimal imaging parameters. In parallel imaging techniques, multiple receivers acquire data simultaneously, which requires accurate calibration to ensure that the images generated are of high quality and accurately represent the tissues being imaged. This calibration process is crucial to achieving the desired signal-to-noise ratio and optimizing the reconstruction algorithms used in parallel imaging. Through calibration scans, characteristics of the coils and the specific imaging environment are assessed to fine-tune the imaging process. This enables the MRI system to effectively combine data from different coils, which can lead to reduced scan times and improved image quality. In relation to other options, while enhancing image resolution and mapping out image artifacts are important aspects of MRI performance, they are not the primary purpose of a calibration scan. Assessing patient safety is a critical consideration during MRI procedures but does not specifically relate to the purpose of calibration in the context of parallel imaging techniques.