February 2026 (2026-02): Delivered a critical bug fix in OHIF/Viewers for RTSTRUCT contour rendering on multi-frame DICOM images when IPP is absent. Updated conditional logic to count frames and render contours on the correct slice, improving accuracy and reliability for multi-frame datasets. This fix enhances clinical confidence in visualization and reduces manual verification effort.

Month 2025-12 – cornerstonejs/cornerstone3D: Stability and reliability enhancements for MPR rendering with crosshair interactions. Implemented a targeted bug fix to prevent a maximum call stack error during measurement jumps when the crosshair is enabled and added a parameter to suppress events during view orientation changes. These changes improve rendering stability, reduce crashes, and enhance user workflow in measurement scenarios.

Month: 2025-10 — Focused on improving ROI measurement fidelity and API modularity in cornerstone3D. Key features delivered include exporting imageSliceSyncCallback via the synchronizers export to enable easier integration and modularity. Major bug fixed: planar freehand ROI perimeter calculation corrected by using gl-matrix vec3.dist and updating related open cached stats and perimeter calculation logic to ensure accurate scaling. Overall impact: increased accuracy of ROI metrics, more reliable measurements, and a cleaner API surface that supports broader integration and downstream analytics. Technologies/skills demonstrated: JavaScript/TypeScript, GL-Matrix usage, API design and refactoring, cross-module collaboration.

In July 2025, OHIF/Viewers focused on strengthening image navigation fidelity, resilience for SEG/RTSTRUCT workflows, and test coverage, delivering three key capabilities with measurable business value. The team improved data presentation accuracy in 2D MPR views, enhanced user experience during missing data scenarios, and stabilized orientation-related behavior across the viewer with updated tests.

March 2025 – OHIF/Viewers: Targeted 2D MPR navigation bug fix and supporting utility; improved measurement switching correctness and viewport selection across multiple viewports. This work reduces navigation errors and enhances measurement reliability, supporting faster, more accurate clinical workflows.

February 2025: OHIF/Viewers - Implemented a targeted fix to robustly handle measurement label customization for arrow-annotated measurements. By adding a getTextCallback check in the active tool options, measurement label auto-completion now behaves correctly for measurements following arrow annotations, eliminating incorrect labels and improving reliability of the measurement workflow. This change addresses issue #4739 and was implemented as a small, low-risk patch with clear commit history.

January 2025: OHIF/Viewers improvements focused on context menu reliability and visibility. By combining two commits, this work tightened accessibility for annotations and prevented clipping of context menus near viewport edges, leading to a smoother annotation workflow and better UX.