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Medical ImagingGenerated accuracy model review: 2026-05-06
CT Effective Dose accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- E (mSv) = DLP * k-factor
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- DLP (Dose Length Product): 500 mGy*cm
- Body Region: Chest (0.014)
Expected outputs
- Effective Dose: 7 mSv
- Chest X-Ray Equivalent: ~70 CXRs
Known limitations
- This tool provides an estimate based on standard adult k-factors. Patient size, scanner geometry, and tube voltage significantly affect actual absorption. Not for clinical chart recording.
Assumptions
- The conversion uses standard adult k-factors and does not account for pediatric scaling or SSDE.
- Effective dose is a population-level risk estimate rather than a direct absorbed-organ dose for one patient.
- Scanner model, protocol design, tube current modulation, and patient size can materially change the real exposure context.
Unit handling
- DLP (Dose Length Product) accepts values in mGy*cm.
- Body Region accepts one of the configured options.
- Effective Dose is displayed in mSv.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current ct-dose-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for CT Effective Dose.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.