Scanner Components and Function

This section describes the major components of a magnetic resonance scanner. The main magnet creates the static field that aligns hydrogen protons. Gradient coils provide spatial encoding and determine slice selection and resolution. Radiofrequency transmitters and receivers generate and detect the magnetic resonance signal. The patient table supports positioning and movement. Each component influences image formation, spatial resolution, temporal resolution, and artifact profile.

Pulse Sequence Concepts

This section provides accessible explanations of common pulse sequences. Spin echo sequences provide robust contrast and reduce susceptibility artifacts. Gradient echo sequences offer faster imaging and support dynamic studies. Inversion recovery sequences provide strong tissue contrast and support fat suppression. Echo planar imaging enables rapid acquisition for diffusion and functional imaging. Sequence parameters influence contrast, signal to noise ratio, and artifact behavior.

Daily Checks and Basic QC

This section provides a practical checklist for daily and weekly magnetic resonance checks. Daily checks include visual inspection of coils, cables, and the patient table. Weekly checks include phantom imaging to verify uniformity, signal to noise ratio, and geometric accuracy. Staff should record results, note anomalies, and escalate concerns. Consistent checks support safe operation and maintain diagnostic quality.