Medical ImagingGenerated accuracy model review: 2026-05-06

CT Pitch 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

**Pitch = Table Feed per Rotation / Total Beam Width** Total Beam Width = Number of Slices × Slice Thickness (e.g., 64 × 0.625mm = 40mm).

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

Table Feed / Rotation: 30 mm
Total Beam Width: 40 mm

Expected outputs

Pitch: 0.75
Scan Type: Overlapping (Detail)

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 a standard helical CT definition of table feed per rotation divided by total beam width.
Dose and image-quality implications are directionally useful but simplified; modern scanner behavior also depends on modulation, reconstruction, and cardiac gating.
This tool is best used for protocol understanding, not as the sole basis for changing a clinical technique.

Unit handling

Table Feed / Rotation accepts values in mm.
Total Beam Width accepts values in mm.

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-pitch-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for CT Pitch.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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