Tomotherapeutic megavoltage CT calibration

Author

Ruchala, Kj ; Olivera, Gh ; Schloesser, Ea ; Hinderer, R. ; Mackie, Tr

Author_Institution

Tomotherapy Inc., Middleton, WI, USA

Volume

3

fYear

2000

fDate

2000

Firstpage

2045

Abstract

A calibration of the University of Wisconsin Tomotherapy Benchtop megavoltage CT (MVCT) system was investigated. It was found that IMVCT values correlate extremely well with electron density and that unlike kilovoltage CT, this correlation is well maintained for higher atomic number materials, and is more robust for different patient sizes and locations. Thus, small improvements in dosimetric calculations should be possible by deriving input images from MVCT as opposed to kVCT, as well as calibrating in terms of electron density, as opposed to physical density

Keywords

biomedical equipment; calibration; computerised tomography; dosimetry; radiation therapy; University of Wisconsin Tomotherapy Benchtop megavoltage CT system; dosimetric calculations improvements; electron density; higher atomic number materials; medical instrumentation; patient location; patient size; physical density; tomotherapeutic megavoltage CT calibration; Calibration; Computed tomography; Electromagnetic scattering; Electrons; Image reconstruction; Imaging phantoms; Medical treatment; Particle scattering; Plugs; Solids;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-6465-1

Type

conf

DOI

10.1109/IEMBS.2000.900526

Filename

900526