The CT dose metric obtained by multiplying the volume CT dose index (CTDIvol) by the total scan length is called:
- A CTDIw
- B Dose length product (DLP) ✓
- C Dose area product (DAP)
- D Organ dose
Correct answer: B. Dose length product (DLP)
Explanation
DLP equals CTDIvol multiplied by scan length in centimetres and represents the total radiation output for the entire acquisition, displayed in mGy.cm. Multiplying DLP by a body-region specific conversion coefficient (k-factor) estimates the effective dose in mSv. CTDIw is the weighted average of peripheral and central CTDI measurements for a single slice, while DAP applies to fluoroscopy units, not CT scanners.
Reference: Radiologic Science for Technologists (Bushong), 12th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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