CT Scan Milligram: Not a Recognized Radiology Term
CT milligram (mg) is not a valid medical or radiology term. Milligram is a unit of mass (1/1000 gram), not an imaging parameter.
What CT Scans Actually Measure
- Hounsfield Units (HU): Quantitative scale of radiodensity (water = 0 HU, air = -1000 HU, bone ≈ +1000 HU).
- Dose metrics: CTDIvol (mGy), DLP (mGy·cm) – measure radiation dose, not image units.
- Contrast concentration: mg iodine/mL – but this is a property of the contrast agent, not the scan itself.
If you encountered "CT milligram" in a report or order, it is likely a misunderstanding or typo. Clarify with the radiology department.
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