Medical Terminology
Decode clinical language one meaningful piece at a time.
Lesson 9 of 12
Diagnostic tests and imaging
Test names describe methods used by qualified clinicians to collect information; the name alone does not reveal a result. Imaging may show anatomy, while electrical studies measure aspects of function. A massage therapist may encounter these terms in a client's history or referral. Record what the client reports accurately, avoid interpreting results, and refer medical questions to the ordering provider.
Key points
- X-ray uses ionizing radiation to create images, especially useful for many bone assessments.
- CT combines x-ray measurements into cross-sectional images; protocols vary.
- MRI uses magnetic fields and radiofrequency signals rather than x-rays.
- Ultrasound uses sound waves to create real-time images of selected tissues.
- EMG evaluates electrical activity associated with muscles; nerve-conduction studies assess signal transmission in nerves.
- A CBC is a blood test that counts and describes blood-cell components.
- Only the qualified provider interprets results in the full clinical picture.
Key terms
- X-ray
- Imaging method using x-rays.
- CT
- Computed tomography; cross-sectional x-ray imaging.
- MRI
- Magnetic resonance imaging using magnetic fields and radiofrequency.
- Ultrasound
- Imaging using high-frequency sound waves.
- EMG
- Electromyography, a study of muscle-related electrical activity.
- Nerve-conduction study
- Test measuring electrical signal transmission along nerves.
- CBC
- Complete blood count.
Memory tip
Separate the test's method from what its result means.
Clinical note
MRI safety screening is important because the scanner uses a powerful magnetic field.
Unit checkpoint
Lock it in: match the terms, then test yourself.