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Medical ImagingGenerated accuracy model review: 2026-05-06
Radiographic Magnification 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
- MF = SID / SOD. True Size = Image Size / MF.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- SID (Source-Image Dist): 100 cm
- SOD (Source-Object Dist): 80 cm
- Measured Image Size: 5 cm
Expected outputs
- Magnification Factor: 1.25
- True Object Size: 4 cm
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- The calculation assumes straight projection geometry and does not account for marker-based calibration or positioning distortion.
- True-size estimates are only as good as the entered distances and image measurement.
- For implant templating or high-stakes sizing, marker-based calibration and local workflow standards are usually preferred.
Unit handling
- SID (Source-Image Dist) accepts values in cm.
- SOD (Source-Object Dist) accepts values in cm.
- Measured Image Size accepts values in cm.
- True Object Size is displayed in cm.
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 magnification-factor-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Radiographic Magnification.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.