Dosimetric Comparison of Automated Noncoplanar VMAT (HyperArc) Versus CyberKnife for Single-Fraction Vestibular Schwannoma Stereotactic Radiosurgery

Vestibular schwannoma (VS) stereotactic radiosurgery (SRS) requires high target conformality and rapid dose falloff to spare adjacent organs at risk (OARs), particularly the brainstem. HyperArc (HA) is an automated noncoplanar volumetric-modulated arc therapy (VMAT) approach designed to standardize and streamline cranial SRS planning and delivery....

No actionable change for most audiologists — dosimetric comparison findings are relevant to radiation oncology and neurosurgery planning teams managing vestibular schwannoma; audiologists involved in pre/post-radiosurgery hearing monitoring should note that both technologies aim to spare cochlear and neural structures, but this study does not report hearing outcome data.

Vestibular schwannoma is a key diagnosis managed across audiology, neurotology, and oncology; optimizing radiosurgery planning to spare hearing-critical structures directly affects the audiological outcomes of treated patients.

1. 01Dosimetric (radiation dose distribution) comparison of HyperArc vs. CyberKnife for vestibular schwannoma radiosurgery.
2. 02Both systems were evaluated on target conformality and sparing of organs at risk (brainstem, cochlea, etc.).
3. 03Single-fraction stereotactic radiosurgery was the treatment modality studied.
4. 04Study did not report clinical hearing or tumor-control outcomes — purely dosimetric.
5. 05Results may inform radiation oncology team decisions but do not directly change audiology practice.

PMID

42073535

DOI

10.3390/cancers18081207.

Journal

Cancers

Publication type

research_article

Evidence level

4

Population

Patients with vestibular schwannoma treated with single-fraction stereotactic radiosurgery

Intervention

Automated noncoplanar VMAT (HyperArc)

Comparator

CyberKnife stereotactic radiosurgery