Diagnostic tool, in brief

MRI

This imaging technique uses strong magnetic fields to create detailed pictures of organs and tissues, often preferred for its lack of radiation.

This clue is a straightforward abbreviation. "Diagnostic tool" refers to medical imaging equipment, and "in brief" signals that the answer is a shortened form—here, MRI stands for Magnetic Resonance Imaging. It’s a common shorthand in crosswords, so solvers recognize it quickly without needing deeper wordplay.