> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spine.altician.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Version history and release notes

## v0.4.0

### CT Scan Support

* Open CT DICOM files alongside MRI with the same workflow
* Automatic bone mesh generation with adjustable threshold
* Metal detection — automatically separate implants and metallic objects
* Window/Level presets for bone, soft tissue, and more

### Annotation & Measurement Tools

* **Arrow** — draw entry path arrows, synced across main and scouter viewports
* **Midline** — define the midline plane from two viewports
* **Skin Detection** — automatic skin entry point detection along arrows
* **S-M Distance** — measure surface distance from skin entry to midline
* **Virtual C-arm** — simulated fluoroscopy view with pointer/arrow overlay

### Endoscope Enhancements

* Place endoscope using arrows for precise entry positioning
* Improved bone removal with faster, more accurate updates
* Better camera controls and roll alignment with midline

### Other Improvements

* Hull geometry improvements for better surface distance accuracy
* NIfTI conversion and dataset download utilities

***

## v0.3.0

*Initial release*

* 3D volume rendering with VTK.js
* DICOM file loading with drag-and-drop
* AI segmentation via Spine Helper
* Virtual endoscope with drilling and deformation
* Scouter dual-view mode
* Export slices as MP4, WebP, PNG, JPG
* Screen recording with anonymization
* Camera presets (SAG, COR, AX, Lt.OBL, Rt.OBL)
* Clip plane with adaptive mode
* Pointer and Ruler tools
* Demo mode with Spider MRI dataset