9.2 Imaging and Radiology Terms
Key Takeaways
- Imaging terms often combine a body-part root with -graphy, -gram, -scope, or a modality abbreviation.
- Radiography, CT, MRI, ultrasound, fluoroscopy, angiography, mammography, and densitometry describe different ways of visualizing anatomy or function.
- Contrast, views, laterality, and body position can change how an imaging order should be read.
- Do not confuse the image, the procedure, the specialty, and the report.
Imaging and Radiology Terms
Imaging terminology is built around the method used to create a picture and the body area being examined. The root radi/o means radiation or x-rays in many terms, but imaging is broader than x-ray. Ultrasound uses high-frequency sound waves. MRI uses magnetic fields and radiofrequency signals. CT uses x-rays processed by a computer to create cross-sectional images. Fluoroscopy uses real-time x-ray imaging. Angiography focuses on blood vessels. If a question gives you an imaging order, decode the body part, the modality, and any instructions such as contrast, view, side, or position.
Modality Map
| Term | Meaning | Key distinction |
|---|---|---|
| radiography | process of making x-ray images | Procedure or technique |
| radiograph | image produced by x-ray | The picture, not the act of taking it |
| radiology | specialty using imaging for diagnosis and procedures | Department or field |
| CT | computed tomography | Cross-sectional x-ray based imaging |
| MRI | magnetic resonance imaging | Uses magnetic field, not ionizing x-ray radiation |
| ultrasound or sonography | imaging with sound waves | Common in obstetric, abdominal, vascular, and soft tissue imaging |
| fluoroscopy | live or moving x-ray imaging | Often used during procedures or contrast studies |
| mammography | breast imaging | Root mamm/o means breast |
| densitometry | measurement of density | Often used for bone density testing |
The suffix -graphy means the process of recording or imaging. A -gram is the record or image. Angiography is imaging of blood vessels; an angiogram is the resulting image or study. Mammography is the imaging process for the breast; a mammogram is the image or exam result in common use. Sonography is ultrasound imaging; a sonogram is the image produced. This procedure-versus-record distinction is a classic terminology test point.
Contrast and View Language
| Phrase | Meaning | Safety note |
|---|---|---|
| with contrast | Contrast material is used to improve visualization | Requires screening and correct protocol |
| without contrast | No contrast material is used | Not the same as non-diagnostic |
| with and without contrast | Images are obtained before and after contrast | Longer protocol than either alone |
| AP view | anterior-posterior view | Beam direction term |
| PA view | posterior-anterior view | Common chest x-ray view |
| lateral view | side view | Often paired with AP or PA |
| bilateral | both sides | Not the same as unilateral |
| right or left | laterality | Wrong side is a patient-safety issue |
Medical terminology does not require you to decide whether contrast is clinically appropriate, but you should understand the word. Contrast is material used to make structures easier to see. It may be given by mouth, vein, rectum, or another route depending on the study. A chart may also say noncontrast, meaning without contrast. The exam-prep danger is to miss the small words. CT abdomen with contrast is not the same wording as CT abdomen without contrast. Right knee x-ray is not the same as left knee x-ray.
Body-Part Imaging Roots
| Root | Meaning | Example |
|---|---|---|
| angi/o | vessel | angiography |
| arteri/o | artery | arteriogram |
| ven/o, phleb/o | vein | venography, phlebography |
| cholecyst/o | gallbladder | cholecystography |
| mamm/o, mast/o | breast | mammography, mastectomy |
| myel/o | spinal cord or bone marrow depending context | myelogram |
| oste/o | bone | bone scan, osteography in word-building contexts |
| hysterosalping/o | uterus and fallopian tubes | hysterosalpingography |
Report Terms
Imaging reports often include indication, technique, findings, impression, comparison, and recommendation. Indication explains why the study was ordered. Technique explains how the study was performed. Findings describe what was seen. Impression summarizes the key interpretation. Comparison references prior studies. Recommendation may suggest follow-up. In a terminology question, these section names are as important as the modality because they tell you whether the sentence is the reason, method, observation, or conclusion.
Sound-alike distinctions matter. Radiograph is an image; radiography is the process; radiology is the specialty. Myelogram may involve the spinal canal context, while myel/o can also mean bone marrow in other terms, so context controls meaning. Angioplasty is repair or widening of a vessel, not imaging by itself; angiography is vessel imaging. Fluoroscopy is live x-ray imaging, not a fluorescent light exam. Safe decoding means naming both the modality and the body target before choosing an answer.
Which term most specifically means the image or record produced by x-ray imaging?
What does angiography mean in medical terminology?
Why does laterality matter in an imaging order?