Study 3 Diagnostic Imaging with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
What should be checked before an imaging examination?
Verify the patient’s identity, requested examination, symptoms, and ability to follow instructions; ask about possible pregnancy, allergies or prior contrast reactions, kidney disease, medications, and prior imaging.
How do bone, air, and soft tissue typically appear on an X-ray?
Bone generally appears white or light gray, air appears dark, and soft tissues appear in shades of gray.
What radiation-safety principle guides routine X-ray use?
X-rays use ionizing radiation, so the clinical team weighs the expected benefit against exposure and uses appropriate imaging protocols.
What should be reported before CT with intravenous iodinated contrast?
Before intravenous iodinated contrast, report prior contrast reactions, kidney disease, and relevant conditions or medications. The care team decides whether kidney-function assessment or other precautions are needed.
Should a patient independently stop metformin before CT contrast?
Do not stop metformin independently. Follow individualized instructions from the clinician or imaging team and local protocol.
Which brief sensations can occur during iodinated contrast injection?
A brief warm or flushed feeling, metallic taste, or urge to urinate can occur during iodinated contrast injection and usually passes quickly.
What may pain and swelling at a CT contrast IV site indicate?
Pain or swelling at the IV site after contrast injection may indicate contrast extravasation and should be reported.
What does MRI use instead of ionizing radiation?
MRI uses magnetic fields and radio waves, not ionizing radiation.
What must happen if a patient reports an unknown-model implant before MRI?
The MRI team must identify and verify the exact device and its conditions for scanning before the patient enters the scanner area.
Does an abnormal MRI signal establish a diagnosis by itself?
Abnormal MRI signal can indicate many different processes. It must be interpreted in context rather than treated as a diagnosis by itself.
What kind of waves does ultrasound use, and does it use ionizing radiation?
Ultrasound uses sound waves and does not use ionizing radiation.
Why should ultrasound preparation instructions be confirmed for each examination?
Preparation depends on the body area: some abdominal exams require fasting, while some pelvic exams require a full bladder. Confirm the specific instructions.
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