PathCal

Overview

A daily monitor calibration tool for pathologists performing digital sign-out.

Problem

• Digital pathology sign-out requires monitors that accurately render subtle tissue differences, but most labs lack a quick, standardized daily QC check
• Existing solutions require hardware colorimeters or vendor-specific software installs

Solution

Two modes: a 1-minute Daily Check wizard (4 pass/fail tests with remediation guidance) and an Advanced Tools page with DICOM GSDF grayscale ramps, CIEDE2000-calibrated color discrimination patches, Landolt-C sharpness patterns, luminance uniformity fields, and an SMPTE test pattern.

Details

• 18-step grayscale ramp at uniform CIELAB lightness intervals (TG18-LN approximation)
• Low-contrast detection at 3 ΔE00 and 1 ΔE00 thresholds
• Stain-specific color patches for H&E, DAB, PAS, Trichrome, and other common histological stains
• Printable daily QC checklist
• Single HTML files with inline CSS and JS