OrthoSpine
OrthoSpine: local posterior-spine surface capture and review-support measurements
OrthoSpine helps trained professionals and supervised research operators capture a posterior trunk surface from behind the subject using iPhone/iPad camera, ARKit, LiDAR where available, and spine-focused skeleton guidance. The app is designed for local-first capture, transparent review, and exportable surface records.
OrthoSpine is an iOS-only professional/research support app for posterior spine surface capture, local mesh export, and scoliosis-related measurement suggestions.
How to use
1. Open the app and read the consent/privacy/terms screen.
2. Accept only if you have permission to scan the person and you will manage local/exported files responsibly.
3. Press Start AR.
4. Stand behind the patient/subject with the back centered.
5. Wait for the white skeleton/spine rig where possible.
6. Press Collect. Red spheres should appear along left/right paraspinal rails.
7. Press Overlay. Red spheres disappear and a smoothed colored mesh appears.
8. Press AI or Scoliosis measurement suite to populate surface/scaffold measurements.
9. Open OSAI-R / dOSAI if you need the proposed refined static or paired bending model.
10. Export USDZ or report only when authorized.
Measurements
Scoliosis measurements include AIdiff, AIvoldiff, AIbasesardiff, AIglobal, Projected Cobb angle, OSAI-R, OSAI-R confidence, optional dOSAI rows and a surface suggestion. Spine posture measurements include head/neck, trunk, pelvis, cervical spine angle, thoracic spine angle, lumbar spine angle, spine lateral deviation, gravity tilt/balance, and spine–gravity index.
Privacy
The current app processes camera/AR/LiDAR/body-pose data locally by default. It does not include an account, advertising SDK, tracking SDK, third-party analytics SDK, or server upload flow. Local exports remain under user control.
Limitations
Projected Cobb angle is a surface-derived support estimate from posterior surface asymmetry. OSAI-R and dOSAI are proposed research-support models and require validation before clinical thresholds or treatment rules are claimed. It is not a radiographic Cobb measurement. The app does not treat, prescribe, replace imaging, replace clinical examination, replace a doctor/specialist, or make autonomous clinical decisions.
Contact
info@orthopractis.com
What the app does:
OrthoSpine guides the operator through launch consent, AR start, skeleton/spine alignment, left/right paraspinal rail collection, red capture-sphere confirmation, smoothed mesh overlay, local preview, report generation, and USDZ/STL/PLY/XYZ export. The app uses collapsible liquid-crystal panels so the AR camera remains visible while measurements and tools stay organized.
Measurement sections:
The app organizes measurements into scrollable groups. The scoliosis and spine workspace includes AIdiff, AIvoldiff, AIbasesardiff, AIglobal, Projected Cobb surface estimate, surface suggestion/review range, cervical angle, thoracic angle, lumbar angle, lateral spine deviation, spine stability, and posture-balance references. Additional posture sections include pelvis, hip, knee, ankle, leg-length support values, and alignment references.
Gravity and balance tools:
Gravity support measurements add context for review. Gravity medial-lateral tilt, combined gravity tilt, gravity balance, and spine-gravity index compare device orientation and captured spine/surface references. These values are not autonomous clinical conclusions; they are support measurements for qualified review.
Privacy summary:
The current build is local-first. It does not include user accounts, advertising SDKs, tracking SDKs, third-party analytics SDKs, or automatic server upload. Camera/AR/LiDAR data, skeleton/spine processing, mesh creation, measurement calculation, preview, and export are controlled by the operator on the device. Exported files are the responsibility of the operator or institution that chooses to save, share, transfer, or archive them.
Professional-use notice:
OrthoSpine does not provide treatment, prescribe care, replace radiographs, replace clinical examination, replace an M.D. or specialist, or make autonomous clinical decisions. Outputs are support measurements, review ranges, surface estimates, and suggestions requiring qualified professional review.
Contact:
For support, privacy, and documentation questions, contact info@orthopractis.com.
Privacy: https://www.orthopractis.com/privacy
Terms of Use: https://www.orthopractis.com/terms-of-use
OrthoSpine is a local-first posterior-spine surface capture and review-support measurement app for trained healthcare professionals, researchers, educators, and supervised operators. It helps the operator capture the posterior trunk surface from behind the subject using iPhone/iPad camera, ARKit, LiDAR where available, and spine-focused skeleton guidance. The app is designed for structured review workflows in clinics, research settings, education, and supervised screening-style documentation where local surface capture, mesh export, and transparent measurement records are required.
The workflow starts with a required launch consent, privacy, terms, and professional-use disclaimer before AR or camera capture begins. After consent, the operator starts AR, centers the subject's back, waits for the live white skeleton/spine rig, and collects PlaceMesh-derived left/right paraspinal rail points. Red capture spheres show the collected surface points. The Overlay action converts those points into a smoothed colored posterior surface mesh, hides the red spheres, and prepares the same repaired mesh for local preview, measurement review, report generation, and USDZ/STL/PLY/XYZ export.
OrthoSpine includes a dedicated scoliosis and spine measurement workspace. Surface asymmetry support measurements include AIdiff, AIvoldiff, AIbasesardiff, AIglobal, Projected Cobb surface estimate, and a surface suggestion/review range. Spine posture measurements include cervical, thoracic, and lumbar angle estimates, lateral spine deviation, spine balance, and spine stability support values. The extended measurement catalog also includes pelvis and lower-limb reference measurements such as pelvic tilt, pelvic obliquity, pelvic rotation, hip/knee/ankle alignment references, leg-length difference support values, and related posture review fields.
Gravity and balance support tools provide additional review context. These include gravity medial-lateral tilt, gravity combined tilt, gravity balance, and a spine-gravity index that compares the captured surface/spine corridor with device-orientation and body-alignment references. These values are presented as support measurements and review ranges, not as autonomous clinical conclusions. The goal is to help organize a local, repeatable capture and measurement record that a qualified professional can review alongside clinical examination and any required imaging.
The interface uses scrollable liquid-crystal style panels, collapsible dropdown groups, a transparent workflow assistant, capture controls, measurement calculators, local file preview, and export/report tools. The user can expand only the needed section, keep the AR view visible, and run capture, overlay, measurement, export, and report steps from the main workflow.
Processing is local-first in the current build. OrthoSpine does not include user accounts, advertising SDKs, tracking SDKs, third-party analytics SDKs, or automatic server upload. Camera, AR, LiDAR, skeleton/spine recognition, mesh creation, measurement calculations, report creation, and exports are controlled on the device by the operator. Exported files remain under the responsibility of the operator or institution that chooses to save, share, archive, or transfer them.
OrthoSpine does not provide treatment, prescribe care, replace radiographs, replace clinical examination, replace an M.D. or specialist, or make autonomous clinical decisions. Outputs are support measurements, review ranges, surface estimates, and suggestions that require qualified professional review.
Step-by-step operator workflow
Consent: read the launch consent, privacy, terms and responsibility notice. Continue only with permission and professional supervision.
Prepare scene: ensure good lighting, remove unnecessary reflective objects, and keep the subject/patient still with the posterior trunk visible.
Start AR: press Start AR and wait for the camera view to stabilize.
Position: stand behind the subject/patient and center the spine area in the camera view.
White rig: when available, use the white skeleton/spine rig as a guide; if not stable, continue with assisted posterior-spine capture only after pressing Collect.
Collect: press Collect. Red spheres should appear evenly along left/right paraspinal rails.
Inspect points: repeat Collect if the surface is sparse. Use reset only when starting over.
Overlay: press Overlay. The red spheres are hidden and one smoothed colored mesh appears on the captured surface.
Measurements: press AI, Projected Cobb, or Scoliosis Measurements to populate support rows.
Export: export USDZ/STL/PLY/XYZ/report only if authorized.
OrthoSpine
Limitations
The result depends on posterior surface quality, patient/subject positioning, rail balance, clothing, soft-tissue contour, body habitus, lighting, depth quality, mesh smoothing, and operator technique.
Projected Cobb is a surface-derived estimate and should not be presented as radiographic Cobb.
All outputs require professional review before any clinical or research interpretation.
hat is measured in Orthospine App execpt
scoliosis and surface-asymmetry support measurements:
- AIdiff: point-to-point left/right posterior-surface difference support value.
- AIvoldiff: left/right surface-volume difference support value.
- AIbasesardiff: base-area/surface-area difference support value.
- AIglobal: weighted global surface-asymmetry support value.
- Projected Cobb surface estimate: surface-derived estimate intended for review support only.
- Surface suggestion/review range: plain-language review category requiring qualified professional interpretation.
Spine posture measurements:
- Cervical spine angle estimate.
- Thoracic spine angle estimate.
- Lumbar spine angle estimate.
- Lateral spine deviation.
- Spine stability support value.
- Spine balance references.
Gravity and balance references:
- Gravity medial-lateral tilt.
- Gravity combined tilt.
- Gravity balance.
- Spine-gravity index.
- Device-orientation support values used as review context.
Pelvis and lower-limb reference measurements:
- Pelvic tilt.
- Pelvic obliquity.
- Pelvic rotation.
- Hip/knee/ankle alignment references.
- Leg-length difference support values.
- Related posture and surface-review fields.