v0.2.0: Automatic level detection + Multi-level analysis + automatic dural sac

[0.2.0] - 2026-06-25

Added

• Automatic lumbar level detection via TotalSpineSeg: labels intervertebral discs (L1-L2 … L5-S) and the L3 vertebral body, then maps them onto the axial series with gap detection for levels not covered by the axial volume.
• Automatic dural sac segmentation: cross-sectional area is computed by resampling the TotalSpineSeg canal mask onto each axial slice in world space, replacing the previous manual polygon ROI.
• Multi-level analysis ("Analyze All Levels"): paraspinal muscle metrics + dural sac CSA at every detected level in a single run. Levels falling in axial gaps are analyzed from the nearest slice and flagged with the offset distance.
• Canal narrowing flags: neutral comparison of dural sac CSA against published thresholds (absolute <75, relative <100, early <130 mm²), with a caveat at L5-S where the thresholds are less reliable. Reported as a research aid for the radiologist, not a diagnosis.
• L3-based sarcopenia in the multi-level workflow, with a nearest-slice fallback when the L3 vertebral body falls in an axial gap. PMI is reported only at L3; other levels report muscle CSA / fat fraction.
• Multi-level PDF and Excel reports: per-level table, muscle detail, sarcopenia summary, stenosis flags, and disclaimers. The existing report buttons produce the multi-level report when a multi-level analysis has been run.
• GUI: "Detect Levels" panel with a clickable level list (jumps to the corresponding axial slice), sagittal level overlay with labels, axial canal overlay, and "Analyze All Levels" action.
• TotalSpineSeg MPS (Apple Silicon GPU) support patch under patches/.

Changed

• Dural sac CSA is now automatic; the manual ROI panel ("Draw ROI" / "Clear") has been removed.
• Analyze now also overlays the segmented dural sac and reports its CSA automatically.
• Sarcopenia notes and batch messages translated to English for consistency.

Fixed

• Axial canal overlay was rendered at the wrong location due to (1) stale TotalSpineSeg output files from prior runs and (2) a basename match that incorrectly paired sagittal_s2 with sagittal_s201. The output directory is now cleared before each run and the canal NIfTI is matched by exact stem.
• Sagittal level overlay vertical positioning corrected (consistent cranial→caudal mapping in both directions).

Notes

• Research use only. Stenosis thresholds are from the literature and have not been validated against a local cohort. Supine MRI may underestimate canal narrowing relative to axial-loaded/standing imaging.

SpinoSarc v0.1.1

First public release of SpinoSarc.

Features

• DICOM ingestion (Siemens, Philips, GE — including JPEG Lossless)
• Automated paraspinal muscle segmentation (8 classes) via MuscleMap backbone
• Quantitative metrics: CSA, fat fraction, TPA, PMI
• Manual dural sac CSA via polygon ROI
• Single-page PDF and Excel report export
• Bilingual UI (English/Turkish)
• Fully offline operation

Installation

1. Download SpinoSarc-0.1.0.dmg below
2. Open the DMG and drag SpinoSarc.app to Applications
3. First launch: right-click → Open → Open (to bypass Gatekeeper)

System requirements

• macOS 11.0+ (Apple Silicon: M1/M2/M3/M4)
• ~2 GB free disk space

⚠️ Research use only

Not for clinical decision-making. See DISCLAIMER.md.