fix: correct typo in PerceptualLoss MedicalNet warning message (Fixes #8923)

[rtmalikian]

Fixes #8923

Problem

In monai/losses/perceptual.py line 115, the warning message for MedicalNet channel_wise has a typo:

"MedicalNet networks supp, ort channel-wise loss. Consider setting channel_wise=True."

The word "support" is broken by a stray comma and space: supp, ort → support.

Solution

Correct the typo to: "MedicalNet networks support channel-wise loss. Consider setting channel_wise=True."

Verification

$ python3 -c "import ast; ast.parse(open('monai/losses/perceptual.py').read()); print('Syntax OK')"
Syntax OK

The fix changes only the warning message string — no logic or behavior is affected.

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About the Author: Raphael Malikian — Clinical AI Solutions Architect. I specialise in building and fixing AI/ML systems for healthcare, including vector databases, RAG pipelines, and clinical NLP. If you need help with your project or think I can add value to your organisation, feel free to reach out — I'd love to connect.

📧 rtmalikian@gmail.com
🔗 GitHub: https://github.com/rtmalikian
🔗 LinkedIn: http://www.linkedin.com/in/raphael-t-malikian-mbbs-bsc-hons-71075436a

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Disclosure: This code was developed with assistance from mimo-2.5-pro (Xiaomi) via Hermes Agent (Nous Research). All changes were reviewed, tested against the actual codebase, and verified for correctness.

Changelog

Date	Change	Author
2026-06-18	Initial fix: correct typo in PerceptualLoss MedicalNet warning	rtmalikian
2026-06-18	Added DCO sign-off to commit	rtmalikian
2026-06-18	Updated PR documentation with changelog	rtmalikian

Files Changed

• monai/losses/perceptual.py — Fixed typo "supp, ort" → "support" in MedicalNet channel_wise warning message

Verification

• ✅ Warning message now reads correctly: "MedicalNet networks support channel-wise loss."
• ✅ DCO sign-off present on all commits

[coderabbitai]

📝 Walkthrough

Walkthrough

One-character typo fix in a warning string inside monai/losses/perceptual.py. The corrected message is emitted when validating MedicalNet configuration related to channel-wise loss support. No logic, control flow, or public API changed.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title clearly and specifically describes the main change: correcting a typo in the PerceptualLoss MedicalNet warning message.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description check	✅ Passed	The pull request description comprehensively covers all required sections: problem statement, solution, verification, and includes changelog. However, the template's 'Types of changes' checklist is not completed.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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