A method to characterize the radiation output from a cone beam O-arm using a device for dose and dose profile scanning measurement
(2013) SPIE Medical Imaging, 2013 8668. p.86682-86682- Abstract
- The O-arm system is a mobile intraoperative imaging system that is comprised of fluoroscopy and cone beam CT. The configuration of the O-arm system with absence of patient table and a broad beam width (165 mm in isocenter) brings new practical and physical requirements on how to perform dose measurements. The purpose of this study was to describe a method that overcomes this and makes it possible to characterize the radiation output from the O-arm system. A holder with a clamp and a flexible ball joint that can orientate the radiation detector support and the Mover that can be adjusted to hold the dose detector in a horizontal position was used. Evaluation of the dose response for three different dose detectors of different active length... (More)
- The O-arm system is a mobile intraoperative imaging system that is comprised of fluoroscopy and cone beam CT. The configuration of the O-arm system with absence of patient table and a broad beam width (165 mm in isocenter) brings new practical and physical requirements on how to perform dose measurements. The purpose of this study was to describe a method that overcomes this and makes it possible to characterize the radiation output from the O-arm system. A holder with a clamp and a flexible ball joint that can orientate the radiation detector support and the Mover that can be adjusted to hold the dose detector in a horizontal position was used. Evaluation of the dose response for three different dose detectors of different active length (0.3, 23.1 and 100 mm) was made for three different beam qualities. Furthermore the dose profile free in air to control the possible heel effect and width of the x-ray field during rotation was measured and the dose rate waveform was analyzed. The FWHM of the dose profile was 162 mm The dose response of the three detectors is reported. The average dose response was lower for the detector with longer active length due to the influence of the dose profile shape. From dynamic measurement total exposure time, pulse width, and the number of pulses were verified. In conclusion, an external horizontal hanging holder with mover option helps to assist to make dose measurement easier and enables characterize the radiation output from the O-arm system. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4027057
- author
- Herrnsdorf, Lars LU and Söderberg, Marcus LU
- organization
- publishing date
- 2013
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- cone beam CT, radiation dosimetry, dose profile, FWHM, point dose, point, dose rate
- host publication
- Medical Imaging 2013: Physics of Medical Imaging
- volume
- 8668
- pages
- 6 pages
- publisher
- SPIE
- conference name
- SPIE Medical Imaging, 2013
- conference location
- Lake Buena Vista (Orlando area), Florida, United States
- conference dates
- 2013-02-09 - 2013-02-14
- external identifiers
-
- wos:000322002700094
- scopus:84878282244
- ISSN
- 1996-756X
- 0277-786X
- ISBN
- 9780819494429
- DOI
- 10.1117/12.2006514
- project
- Image quality / radiation doses at cone-beam CT (CBCT) examinations
- language
- English
- LU publication?
- yes
- id
- 5f302929-340c-44e1-a8af-28c0f2537224 (old id 4027057)
- date added to LUP
- 2016-04-01 10:54:42
- date last changed
- 2024-01-07 04:12:43
@inproceedings{5f302929-340c-44e1-a8af-28c0f2537224, abstract = {{The O-arm system is a mobile intraoperative imaging system that is comprised of fluoroscopy and cone beam CT. The configuration of the O-arm system with absence of patient table and a broad beam width (165 mm in isocenter) brings new practical and physical requirements on how to perform dose measurements. The purpose of this study was to describe a method that overcomes this and makes it possible to characterize the radiation output from the O-arm system. A holder with a clamp and a flexible ball joint that can orientate the radiation detector support and the Mover that can be adjusted to hold the dose detector in a horizontal position was used. Evaluation of the dose response for three different dose detectors of different active length (0.3, 23.1 and 100 mm) was made for three different beam qualities. Furthermore the dose profile free in air to control the possible heel effect and width of the x-ray field during rotation was measured and the dose rate waveform was analyzed. The FWHM of the dose profile was 162 mm The dose response of the three detectors is reported. The average dose response was lower for the detector with longer active length due to the influence of the dose profile shape. From dynamic measurement total exposure time, pulse width, and the number of pulses were verified. In conclusion, an external horizontal hanging holder with mover option helps to assist to make dose measurement easier and enables characterize the radiation output from the O-arm system.}}, author = {{Herrnsdorf, Lars and Söderberg, Marcus}}, booktitle = {{Medical Imaging 2013: Physics of Medical Imaging}}, isbn = {{9780819494429}}, issn = {{1996-756X}}, keywords = {{cone beam CT; radiation dosimetry; dose profile; FWHM; point dose; point; dose rate}}, language = {{eng}}, pages = {{86682--86682}}, publisher = {{SPIE}}, title = {{A method to characterize the radiation output from a cone beam O-arm using a device for dose and dose profile scanning measurement}}, url = {{http://dx.doi.org/10.1117/12.2006514}}, doi = {{10.1117/12.2006514}}, volume = {{8668}}, year = {{2013}}, }