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Preliminary experience with frameless stereotactic radiotherapy
J M Buatti1, F J Bova, W A Friedman
1Department of Radiation Oncology, University of Florida College of Medicine, Gainesville 32610, USA.
International Journal of Radiation Oncology, Biology, Physics
|November 7, 1998
Summary
This study shows that a new frameless stereotactic radiotherapy system provides highly accurate and practical treatments for brain tumors. Initial clinical experience demonstrated minimal side effects and excellent precision, making it a promising tool for neuro-oncology.
Area of Science:
- Neurosurgery
- Radiation Oncology
- Medical Physics
Background:
- Stereotactic radiotherapy (SRT) offers precise radiation delivery for brain tumors.
- Advancements in frameless systems aim to improve accuracy and patient comfort.
- The University of Florida developed a novel high-precision frameless stereotactic radiotherapy system.
Purpose of the Study:
- To evaluate the initial clinical experience and performance of a new frameless stereotactic radiotherapy system.
- To assess treatment accuracy, reproducibility, and clinical outcomes.
- To determine the feasibility and practicality of this novel SRT approach.
Main Methods:
- Sixty patients (age 2-82) received 1426 treatments using the frameless system.
- Tumors treated included meningiomas, astrocytomas, germinomas, and craniopharyngiomas.
- Treatment reproducibility was measured using infrared light-emitting diodes (IRLEDs) and compared to a stereotactic radiosurgery reference system, with a maximum tolerated misalignment of 0.3 mm and 0.3 degrees.
Main Results:
- Mean follow-up was 11 months; only 3 patients experienced recurrence.
- Acute side effects were minimal; 4/11 low-grade astrocytoma patients had transient cerebral edema.
- Treatment accuracy exceeded expectations, with translational errors <0.10 mm and rotational errors <0.06 degrees. Daily treatments averaged 15 minutes.
Conclusions:
- Initial clinical experience with the frameless SRT system and its infrared guidance was positive.
- The system demonstrated superior treatment accuracy and practicality.
- Evolving patient selection and treatment strategies show promise for this advanced radiotherapy approach.