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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.53 no.1 São Paulo Mar. 1995

http://dx.doi.org/10.1590/S0004-282X1995000100007 

Radiocirurgia por acelerador linear

 

Linear accelerator radiosurgery

 

 

Reynaldo André BrandtI; João Vitor SalvajoliII; Vinio Cintra OliveiraII; Marcia CarmignaniIII; José Carlos da CruzIV; Heidi Demura LealV; Lygia FerrazVI

INeurocirurgião
IIRadioterapeuta
IIImagenologista
IVFísico
VEnfermeira
VIInstrurnentadora

 

 


RESUMO

A radiocirurgia consiste na irradiação precisa de um volume alvo intracraniano com uma alta dose de energia, preservando o tecido nervoso adjacente. O desenvolvimento tecnológico dos aceleradores lineares, dos equipamentos estereotáxicos e da ciência de computação simplificaram o procedimento e tornaram-no acessível. Suas indicações principais são as lesões intracranianas inoperáveis como malformações artério-venosas, schwanomas vestibulares e de outros nervos cranianos, meningeomas da base do crânio, gliomas e metástases cerebrais. Mais recentemente o desenvolvimento da radioterapia estereotáxica fracionada ampliou o espectro" de indicações da radiocirurgia para lesões maiores e adjacentes a estruturas nervosas críticas. Apresentamos a nossa experiência inicial com estas técnicas no tratamento de 31 pacientes. Observamos controle adequado das lesões neoplásicas tratadas e aguardamos o tempo necessário para a observação de resultados nas malformações artério-venosas.

Palavras-chave: radiocirurgia, radioterapia, estereotaxia, malformação artério-venosa cerebral, glioma, schwanoma, meningeoma, metastase cerebral.


SUMMARY

Radiosurgery is the precise radiation of a known intracranial target with a high dose of energy, sparing the adjacent nervous tissue. Technological advances in the construction of linear accelerators, stereotactic instruments and in computer sciences made this technique easier to perform and affordable. The main indications for radiosurgery are inoperable cerebral vascular malformations, vestibular and other cranial schwannomas, skull base meningiomas, deep seated gliomas and cerebral metastases. More recently, the development of fraccionated stereotactic radiotherapy increased the spectrum of indications to bigger lesions and to those adjacent to critical nervous structures. We present our initial experience in the treatment of 31 patients. An adequate control of the neoplastic lesions was obtained and the adequate time of observation is still needed to evaluate the results in arteriovenous malformations.

Key words: radiosurgery, radiotherapy, stereotaxis, cerebral arteriovenous malformation, glioma, schwannoma, meningioma, brain metastasis.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

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Aceite: 2-julho-1994.

 

 

Dr. Reynaldo André Brandt - Avenida Albert Einstein 627 sala 392 - 05651-901 São Paulo SP - Brasil