# AI auto-contouring and adaptive planning

Source: https://onco.cc/technologies/auto-contouring-ai/  
OnCo record `auto-contouring-ai` (Technology). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Software that draws organs and tumours on scans automatically, saving hours per patient and making daily plan adaptation practical.

## Summary

Deep-learning segmentation of organs at risk and targets (Limbus AI, MIM Software, TheraPanacea, Siemens AI-Rad Companion Organs RT, Varian Ethos and Elekta's ADMIRE, MVision, Carina) is now routine in radiotherapy departments and FDA-cleared for dozens of structures. Target-volume contouring remains physician-reviewed. Online adaptive radiotherapy (Ethos, Unity) depends on it to re-plan in minutes.

## Fields

- Kind: Technology
- Status: established
- Last checked: 2026-09-08
- Tags: supporting
- Principle: Convolutional and transformer networks trained on expert contours segment CT/MR; outputs are edited and approved by clinicians.
- Strengths: Consistency across planners; Enables adaptive workflows
- Limitations: Target delineation still needs experts; Domain shift across scanners and protocols; Liability and QA frameworks evolving

## Sources

- Cardenas et al., Advances in auto-segmentation (Seminars in Radiation Oncology 2019): https://doi.org/10.1016/j.semradonc.2019.02.001

## Connected records

- fronts: [AI & Computation](https://onco.cc/fronts/ai-computation/), [Radiation Therapy](https://onco.cc/fronts/radiation/)
- technologies: [Adaptive radiotherapy (online replanning)](https://onco.cc/technologies/adaptive-radiotherapy/), [AI compute and model platforms for oncology](https://onco.cc/technologies/ai-compute-platforms/), [IMRT / IGRT (modern external beam)](https://onco.cc/technologies/imrt-igrt/), [Knowledge-based and automated treatment planning](https://onco.cc/technologies/knowledge-based-planning/), [MR-guided adaptive radiotherapy](https://onco.cc/technologies/mr-linac/), [Radiotherapy treatment planning and QA software](https://onco.cc/technologies/treatment-planning-systems/), [Ring-gantry linacs (Halcyon, Ethos)](https://onco.cc/technologies/ring-gantry-linac/)
- companies: [Limbus AI](https://onco.cc/companies/limbus-ai/), [MIM Software (GE HealthCare)](https://onco.cc/companies/mim-software/), [MVision AI](https://onco.cc/companies/mvision-ai/), [RaySearch Laboratories](https://onco.cc/companies/raysearch/), [Siemens Healthineers](https://onco.cc/companies/siemens-healthineers/), [TheraPanacea](https://onco.cc/companies/therapanacea/), [Varian (Siemens Healthineers)](https://onco.cc/companies/varian/)
- key papers: [Advances in Auto-Segmentation](https://onco.cc/key-papers/paper-cardenas-semin-radiat-oncol/)
- terms: [IMRT / IGRT / VMAT (modern external beam radiotherapy)](https://onco.cc/terms/imrt-term/)
- roadmaps: [AI in oncology roadmap: pattern readers → foundation models → agents in the workflow](https://onco.cc/roadmaps/ai-oncology-roadmap/), [Radiotherapy roadmap: X-rays → shaped beams → fewer fractions, particles and FLASH](https://onco.cc/roadmaps/radiation-roadmap/)

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