About this Medicine article
Positioning Accuracy in Stereotactic Radiotherapy Using a Mask System With Added Vacuum Mouth Piece and Stereoscopic X-Ray Positioning by Jan van Santvoort; Ruud Wiggenraad; Petra Bos is a Medicine article available to read on EtoBox.
Purpose: For cranial patients receiving stereotactic radiotherapy, we use the Exactrac stereoscopic X-ray system to optimize patient positioning. Patients are immobilized with the BrainLAB Mask System (BrainLAB, Feldkirchen, Germany). We have developed an adapter to this system that accommodates a vacuum mouth piece (VMP). Measurements with the Exactrac system have been performed to study the positioning accuracy after corrections with this system and to evaluate the accuracy of the VMP vs. the standard available upper jaw support (UJS). Methods and Materials: Positioning results were collected for 20 patients with the UJS and 20 patients with the VMP, before treatment (1,122 fractions) and after treatment (400 fractions). For all 6 degrees of freedom the average, the random error and systematic error were calculated. Results: The average vector length before and after correction with the Exactrac system was 2.1 ± 1.2 mm and 0.7 ± 0.6 mm respectively for UJS and 1.7 ± 0.7 mm and 0.4 ± 0.4 mm for VMP. Interfraction positioning for translations was greatly improved after correction with the Exactrac system (p < 0.0005) and is better with VMP than with UJS (p = 0.005). Outliers were g
It is typically read by researchers, students, and practitioners in Medicine.
- Author
- Jan van Santvoort; Ruud Wiggenraad; Petra Bos
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0360-3016)
- Published
- 2008
- Language
- EN
- Field
- Medicine (Health Sciences)