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Exactrac

Manufactured by Agilent Technologies
Sourced in United States

ExacTrac is a high-precision patient positioning and monitoring system designed for radiotherapy treatments. It utilizes advanced imaging and tracking technologies to accurately locate and track the position of the patient and the target during radiation therapy sessions.

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2 protocols using exactrac

1

Stereotactic Radiosurgery for Meningiomas

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From 1995 to 2003, meningioma patients underwent “sharp” fixation using a stereotactic head ring and an oral bite plate. A 6-MV Linac (Varian Medical Systems, USA) with an add-on micro multi-leaf collimator (BrainLAB, Germany) was used. Coordinates for SRS were set by a laser-based stereotactic localizer. This setup allowed delivering shaped beams. In 2004, the department started using NovalisTx with beam shaping capability using built-in MLC and image guidance with ExacTrac (Varian Medical Systems, USA and BrainLAB, Germany). The image-guided frameless system enabled us to image the patient at any couch position using a frameless positioning array. A three-dimensional treatment planning based on CT and co-registered MRI was done with Brainscan (BrainLAB, Germany), which was later replaced by iplanRT (BrainLAB, Germany). The GTV was defined as the area of contrast enhancement on T1-weighted MR images and the planning target volume (PTV) included a 1–2 mm isotropic safety margin. The dose was prescribed to a reference point, representing 100%. Patients received 95% of the prescribed dose at the PTV margin. Dose constraints for OAR were as follows: optic nerves, chiasma, and brainstem could receive maximal 54 Gy according to Quantitative Analyses of Normal Tissue Effects in the Clinic (QUANTEC) [13 (link)].
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2

Stereotactic Radiosurgery for Meningioma

Check if the same lab product or an alternative is used in the 5 most similar protocols
From 1995 to 2003, meningioma patients underwent “sharp” fixation using a stereotactic head ring and an oral bite plate. A 6-MV linear accelerator (LINAC) (Varian Medical Systems, USA) with an add-on micro-multileaf collimator (BrainLAB, Germany) was used. Coordinates for SRS were set by a laser-based stereotactic localizer, which allowed the delivery of shaped beams. In 2004, the department started using Novalis Tx with beam shaping capability using built-in multileaf collimator (MLC) and image guidance with ExacTrac (Varian Medical Systems, USA, and BrainLAB, Germany). The image-guided frameless system enabled imaging with high accuracy independent of couch position. A three-dimensional treatment planning based on CT-co-registered with MRI was calculated using BrainScan (BrainLAB, Germany), which was later replaced by iPlan RT (BrainLAB, Germany). The gross tumor volume (GTV) was defined as the area of contrast enhancement on T1-weighted MR images, and the planning target volume (PTV) included a 1–2 mm isotropic safety margin. The dose was prescribed to a reference point, representing 100%. Patients received 95% of the prescribed dose at the PTV margin.
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