Summary
Using a non-invasive mask this patient fixation system for stereotactic radiotherapy allows one to perform fractionated irradiation. Measuring the statistical quantities of patient motion and positioning uncertainties and calculating its effect on a spherically symmetric dose distribution showed that there is no severe disadvantage in most cases. Only if small field-size, excentric target volume localisation and extreme proximity to an organ at risk coincides have the statistical effects to be taken into account. The greatest measured standard deviation for positioning uncertainty was 2.3 mm. Its effect on the dose distribution with a field size of 9.1 mm increases the diameter of the 80% isodose to about 115%.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Hartmann GH, Schlegel W, Sturm V, Kober B, Pastyr O, Lorenz WJ (1985) Cerebral radiation surgery using moving field irradiation at a linear accelerator facility. Int J Radiat Oncol Biol Phys 11: 1185–1192
Hosemann R, Bagchi SN (1962) Direct analysis of diffraction by matter. North-Holland, Amsterdam, pp 69–70
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer-Verlag
About this paper
Cite this paper
Hodapp, N., Nanko, N., Röhner, F., Frommhold, H. (1994). Quality Assurance for Non-Invasive Patient Fixation During Stereotactic Convergent Beam Irradiation. In: Lindquist, C., Kondziolka, D., Loeffler, J.S. (eds) Advances in Radiosurgery. Acta Neurochirurgica Supplementum, vol 62. Springer, Vienna. https://doi.org/10.1007/978-3-7091-9371-6_21
Download citation
DOI: https://doi.org/10.1007/978-3-7091-9371-6_21
Publisher Name: Springer, Vienna
Print ISBN: 978-3-7091-9373-0
Online ISBN: 978-3-7091-9371-6
eBook Packages: Springer Book Archive