Biomaterial Database

[Technique of Linac radiosurgery for cerebral arteriovenous malformations]. 2001

M Schlienger, and E Touboul

Service d'Oncologie-Radiothérapie, Hôpital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris.

OBJECTIVE Description of the irradiation technique used by our group since 1986 for radiosurgery of cerebral arteriovenous malformations using Xrays minibeams from a linear accelerator. Method. The technique was elaborated by O. Betti in the early 80. He used several coronal arcs to irradiate the center of the target with X rays circular minibeams. Their diameter (6 to 20 mm) is chosen according to the size of the nidus. The patient is seated in a specially built armchair. His head is immobilized with the Talairach frame afixed in the calvarium by 4 special screws: they allow to remove the frame after stereotactic angiography and/or CTscan and to replace it to perform the stereotactic irradiation. The frame and the head rotate around an horizontal axis passing by the linac isocenter ie the center of the target volume. The combination of both movements: rotation of the Linac and rotation of the stereotactic frame covers a spherical sector representing the surface of portals of entry of the minibeams. The frame can slide on a plate allowing access to the entire brain. Results. The special seat and the frame are movable on curved rails allowing to avoid or reduce irradiation of the body of the patient. CONCLUSIONS We have been using this system of irradiation in the seated position since 1986 to treat more than 900 patients.

UI	MeSH Term	Description	Entries
D010315	Particle Accelerators	Devices which accelerate electrically charged atomic or subatomic particles, such as electrons, protons or ions, to high velocities so they have high kinetic energy.	Betatrons,Linear Accelerators,Accelerator, Linear,Accelerator, Particle,Accelerators, Linear,Accelerators, Particle,Betatron,Linear Accelerator,Particle Accelerator
D011187	Posture	The position or physical attitude of the body.	Postures
D011880	Radiotherapy Planning, Computer-Assisted	Computer-assisted mathematical calculations of beam angles, intensities of radiation, and duration of irradiation in radiotherapy.	Computer-Assisted Radiotherapy Planning,Dosimetry Calculations, Computer-Assisted,Planning, Computer-Assisted Radiotherapy,Calculation, Computer-Assisted Dosimetry,Calculations, Computer-Assisted Dosimetry,Computer Assisted Radiotherapy Planning,Computer-Assisted Dosimetry Calculation,Computer-Assisted Dosimetry Calculations,Dosimetry Calculation, Computer-Assisted,Dosimetry Calculations, Computer Assisted,Planning, Computer Assisted Radiotherapy,Radiotherapy Planning, Computer Assisted
D002538	Intracranial Arteriovenous Malformations	Congenital vascular anomalies in the brain characterized by direct communication between an artery and a vein without passing through the CAPILLARIES. The locations and size of the shunts determine the symptoms including HEADACHES; SEIZURES; STROKE; INTRACRANIAL HEMORRHAGES; mass effect; and vascular steal effect.	Arteriovenous Malformations, Cerebral,Intracranial Arteriovenous Malformations, Congenital,AVM (Arteriovenous Malformation) Intracranial,Cerebral Arteriovenous Malformations,Congenital Intracranial Arteriovenous Malformations,Intracranial Arteriovenous Malformation, Ruptured,Ruptured Intracranial Arteriovenous Malformation,Arteriovenous Malformation, Cerebral,Arteriovenous Malformation, Intracranial,Arteriovenous Malformations, Intracranial,Cerebral Arteriovenous Malformation,Intracranial Arteriovenous Malformation,Malformation, Cerebral Arteriovenous,Malformation, Intracranial Arteriovenous,Malformations, Cerebral Arteriovenous,Malformations, Intracranial Arteriovenous
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013238	Stereotaxic Techniques	Techniques used mostly during brain surgery which use a system of three-dimensional coordinates to locate the site to be operated on.	Stereotactic Techniques,Stereotaxic Technics,Stereotactic Technique,Stereotaxic Technic,Stereotaxic Technique,Technic, Stereotaxic,Technics, Stereotaxic,Technique, Stereotactic,Technique, Stereotaxic,Techniques, Stereotactic,Techniques, Stereotaxic
D016634	Radiosurgery	A radiological stereotactic technique developed for cutting or destroying tissue by high doses of radiation in place of surgical incisions. It was originally developed for neurosurgery on structures in the brain and its use gradually spread to radiation surgery on extracranial structures as well. The usual rigid needles or probes of stereotactic surgery are replaced with beams of ionizing radiation directed toward a target so as to achieve local tissue destruction.	Gamma Knife Radiosurgery,Linear Accelerator Radiosurgery,Stereotactic Body Radiotherapy,Stereotactic Radiosurgery,CyberKnife Radiosurgery,LINAC Radiosurgery,Radiosurgery, Gamma Knife,Radiosurgery, Linear Accelerator,Radiosurgery, Stereotactic,Stereotactic Radiation,Stereotactic Radiation Therapy,CyberKnife Radiosurgeries,Gamma Knife Radiosurgeries,LINAC Radiosurgeries,Linear Accelerator Radiosurgeries,Radiation Therapy, Stereotactic,Radiation, Stereotactic,Radiosurgery, CyberKnife,Radiosurgery, LINAC,Radiotherapy, Stereotactic Body,Stereotactic Body Radiotherapies,Stereotactic Radiation Therapies,Stereotactic Radiations,Stereotactic Radiosurgeries,Therapy, Stereotactic Radiation
D019583	Dose Fractionation, Radiation	Administration of the total dose of radiation (RADIATION DOSAGE) in parts, at timed intervals.	Radiotherapy Dose Fractionation,Dose Fractionation, Radiotherapy,Radiation Dose Fractionation,Dose Fractionations, Radiotherapy,Fractionation, Radiation Dose,Fractionation, Radiotherapy Dose,Fractionations, Radiotherapy Dose,Radiotherapy Dose Fractionations