Daily positioning accuracy of frameless stereotactic radiation therapy with a fusion of computed tomography and linear accelerator (focal) unit: evaluation of z-axis with a z-marker

M Uematsu; M Sonderegger; A Shioda; K Tahara; T Fukui; Y Hama; T Kojima; J R Wong; S Kusano

doi:10.1016/s0167-8140(99)00037-7

Daily positioning accuracy of frameless stereotactic radiation therapy with a fusion of computed tomography and linear accelerator (focal) unit: evaluation of z-axis with a z-marker

Radiother Oncol. 1999 Mar;50(3):337-9. doi: 10.1016/s0167-8140(99)00037-7.

Authors

M Uematsu¹, M Sonderegger, A Shioda, K Tahara, T Fukui, Y Hama, T Kojima, J R Wong, S Kusano

Affiliation

¹ Division of Radiation Oncology, National Defense Medical College, Tokorozawa, Saitama, Japan.

PMID: 10392820
DOI: 10.1016/s0167-8140(99)00037-7

Abstract

To evaluate quantitative positioning errors of frameless stereotactic radiation therapy with a fusion of computed tomography (CT) and linear accelerator unit, Z-type CT markers were attached to patients, and CT images were obtained before and after daily treatment. In 40 verification tests, geometrical errors were never more than 1 mm.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Brain Neoplasms / radiotherapy
Dose Fractionation, Radiation
Head / anatomy & histology
Humans
Phantoms, Imaging
Radiosurgery / instrumentation*
Radiotherapy Planning, Computer-Assisted
Radiotherapy, Conformal / methods*
Stereotaxic Techniques* / instrumentation
Tomography, X-Ray Computed* / instrumentation