ISSN 0303-5212
 
2026, Vol: 51, Issue: 2
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Original Research 


Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing

May Zeki Saddik.


Abstract
Objective: To evaluate the dosimetric effectiveness of Volumetric Modulated Arc Therapy (VMAT) in head and neck cancer (HNC) patients, specifically focusing on optimizing tumor coverage while sparing critical organs at risk (OAR), such as the cochlea, to minimize functional toxicity.
Methodology: This retrospective study analyzed VMAT plans for nine male HNC patients (aged 50–60). Treatment plans were generated using the Monaco system with the Monte Carlo algorithm. Target coverage and OAR dose constraints (cochlea, optic chiasm, and larynx) were evaluated using dose-volume histograms.
Results: VMAT demonstrated high-quality planning, achieving excellent target coverage (98.79%±1.13). Doses to critical structures remained within clinical tolerances: mean cochlear dose <45 Gy, maximum optic chiasm dose <54 Gy, and mean laryngeal dose <50 Gy.
Conclusion: VMAT effectively delivers optimal HNC tumor coverage while strictly sparing adjacent critical structures, potentially reducing treatment-related sensory and functional complications.

Key words: Cochlear sparing, head and neck cancer, organs at risk, radiotherapy planning, Volumetric Modulated Arc Therapy.


 
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Pubmed Style

May Zeki Saddik. Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. RMJ. 2026; 51(2): 365-368. doi:10.5455/rmj.20260128072448

Web Style

May Zeki Saddik. Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. https://www.rmj.org.pk/?mno=308341 [Access: May 26, 2026]. doi:10.5455/rmj.20260128072448

AMA (American Medical Association) Style

May Zeki Saddik. Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. RMJ. 2026; 51(2): 365-368. doi:10.5455/rmj.20260128072448


Vancouver/ICMJE Style

May Zeki Saddik. Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. RMJ. (2026), [cited May 26, 2026]; 51(2): 365-368. doi:10.5455/rmj.20260128072448


Harvard Style

May Zeki Saddik (2026) Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. RMJ, 51 (2), 365-368. doi:10.5455/rmj.20260128072448


Turabian Style

May Zeki Saddik. 2026. Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. Rawal Medical Journal, 51 (2), 365-368. doi:10.5455/rmj.20260128072448


Chicago Style

May Zeki Saddik. "Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing." Rawal Medical Journal 51 (2026), 365-368. doi:10.5455/rmj.20260128072448


MLA (The Modern Language Association) Style

May Zeki Saddik. "Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing." Rawal Medical Journal 51.2 (2026), 365-368. Print. doi:10.5455/rmj.20260128072448


APA (American Psychological Association) Style

May Zeki Saddik (2026) Refining organs at risk protection in head and neck radiotherapy: Volumetric Modulated Arc Therapy efficacy in cochlea and adjacent structures sparing. Rawal Medical Journal, 51 (2), 365-368. doi:10.5455/rmj.20260128072448


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