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Initial clinical experience with frameless stereotactic radiosurgery: analysis of accuracy and feasibility

Identifieur interne : 006679 ( Istex/Curation ); précédent : 006678; suivant : 006680

Initial clinical experience with frameless stereotactic radiosurgery: analysis of accuracy and feasibility

Auteurs : Timothy C. Ryken [États-Unis] ; Sanford L. Meeks [États-Unis] ; Edward C. Pennington [États-Unis] ; Patrick Hitchon [États-Unis] ; Vincent Traynelis [États-Unis] ; Nina A. Mayr [États-Unis] ; Frank J. Bova [États-Unis] ; William A. Friedman [États-Unis] ; John M. Buatti [États-Unis]

Source :

International Journal of Radiation Oncology, Biology, Physics [ 0360-3016 ] ; 2001.

RBID : ISTEX:CEAA48C37A7347137D4A65B4B43212BF6DE6BCD0

English descriptors

Abstract

Abstract: Purpose: To report on preliminary clinical experience with a novel image-guided frameless stereotactic radiosurgery system. Methods and Materials: Fifteen patients ranging in age from 14 to 81 received radiosurgery using a commercially available frameless stereotactic radiosurgery system. Pathologic diagnoses included metastases (12), recurrent primary intracranial sarcoma (1), recurrent central nervous system (CNS) lymphoma (1), and medulloblastoma with supratentorial seeding (1). Treatment accuracy was assessed from image localization of the stereotactic reference array and reproducibility of biteplate reseating. We chose 0.3 mm vector translation error and 0.3 degree rotation about each axis as the maximum tolerated misalignment before treating each arc. Results: The biteplates were found on average to reseat with a reproducibility of 0.24 mm. The mean registration error from CT localization was found to be 0.5 mm, which predicts that the average error at isocenter was 0.82 mm. No patient treatment was delivered beyond the maximum tolerated misalignment. The radiosurgery treatment was delivered in approximately 25 min per patient. Conclusion: Our initial clinical experience with stereotactic radiotherapy using the infrared camera guidance system was promising, demonstrating clinical feasibility and accuracy comparable to many frame-based systems.

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https://api.istex.fr/document/CEAA48C37A7347137D4A65B4B43212BF6DE6BCD0/fulltext/pdf

DOI: 10.1016/S0360-3016(01)01756-4

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<term>Brain neoplasms</term>
<term>Computer-assisted radiotherapy</term>
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<term>Maxillary dentition</term>
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<term>Oncology</term>
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<term>Radiocameras system</term>
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<term>Reference array</term>
<term>Registration error</term>
<term>Reproducibility</term>
<term>Reseating</term>
<term>Rigid body</term>
<term>Stereotactic</term>
<term>Stereotactic localization</term>
<term>Stereotactic radiosurgery</term>
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<term>Stereotaxic techniques</term>
<term>Tolerance limits</term>
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<term>Frameless radiosurgery</term>
<term>Frameless stereotactic radiosurgery</term>
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<term>Image localization</term>
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<term>Radiocameras system</term>
<term>Radiosurgery</term>
<term>Radiotherapy</term>
<term>Real time</term>
<term>Reference array</term>
<term>Registration error</term>
<term>Reproducibility</term>
<term>Reseating</term>
<term>Rigid body</term>
<term>Stereotactic</term>
<term>Stereotactic localization</term>
<term>Stereotactic radiosurgery</term>
<term>Stereotactic radiotherapy</term>
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<front><div type="abstract" xml:lang="en">Abstract: Purpose: To report on preliminary clinical experience with a novel image-guided frameless stereotactic radiosurgery system. Methods and Materials: Fifteen patients ranging in age from 14 to 81 received radiosurgery using a commercially available frameless stereotactic radiosurgery system. Pathologic diagnoses included metastases (12), recurrent primary intracranial sarcoma (1), recurrent central nervous system (CNS) lymphoma (1), and medulloblastoma with supratentorial seeding (1). Treatment accuracy was assessed from image localization of the stereotactic reference array and reproducibility of biteplate reseating. We chose 0.3 mm vector translation error and 0.3 degree rotation about each axis as the maximum tolerated misalignment before treating each arc. Results: The biteplates were found on average to reseat with a reproducibility of 0.24 mm. The mean registration error from CT localization was found to be 0.5 mm, which predicts that the average error at isocenter was 0.82 mm. No patient treatment was delivered beyond the maximum tolerated misalignment. The radiosurgery treatment was delivered in approximately 25 min per patient. Conclusion: Our initial clinical experience with stereotactic radiotherapy using the infrared camera guidance system was promising, demonstrating clinical feasibility and accuracy comparable to many frame-based systems.</div>
</front>
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Initial clinical experience with frameless stereotactic radiosurgery: analysis of accuracy and feasibility

Initial clinical experience with frameless stereotactic radiosurgery: analysis of accuracy and feasibility

Source :

English descriptors

Abstract

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