mri
mri — noun
1. a medical procedure that uses a strong magnet and radio waves to produce detaile
a medical procedure that uses a strong magnet and radio waves to produce detailed images of a person's internal organs and soft tissues, all without surgery or radiation
Dr. Kian told Emma to get an MRI as her knee had hurt for weeks.
have / need an MRI to investigate a symptom
The patient lay still inside the MRI machine for thirty minutes while the scan ran.
MRI machine — the device used to perform the scan
Unlike an X-ray, an MRI shows muscles, tendons, and other soft tissues in great detail.
After the accident, Sade's doctors ordered an MRI to check for damage to her spine.
Tariq's MRI results showed that his shoulder injury was healing well after the treatment.
- magnetic resonance imaging
the full, formal term that MRI abbreviates; used in official medical writing
- nuclear magnetic resonance imaging
the older, longer technical name; rarely used today in patient settings
用法筆記
Though the core meaning is uncountable (the technology itself), speakers often use 'an MRI' to refer to a single scan procedure — for example, 'have an MRI' or 'need an MRI' treat the abbreviation as a countable noun meaning 'an MRI scan'.