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Development and evaluation of an ult...

Jacso, Ferenc.

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Development and evaluation of an ultrasound-guided tracking and gating system for radiotherapy of liver metastases.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Development and evaluation of an ultrasound-guided tracking and gating system for radiotherapy of liver metastases./
Author:	Jacso, Ferenc.
Description:	93 p.
Notes:	Source: Masters Abstracts International, Volume: 46-03, page: 1553.
Contained By:	Masters Abstracts International46-03.
Subject:	Health Sciences, Radiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR34225
ISBN:	9780494342251

Development and evaluation of an ultrasound-guided tracking and gating system for radiotherapy of liver metastases.
Jacso, Ferenc.

Development and evaluation of an ultrasound-guided tracking and gating system for radiotherapy of liver metastases. - 93 p.

Source: Masters Abstracts International, Volume: 46-03, page: 1553.

Thesis (M.Sc.)--University of Calgary (Canada), 2007.

Breathing gating systems can help increase tumour control probability and reduce normal tissue toxicity during stereotactic body radiotherapy of liver metastases. Using an ultrasound machine, a video processing computer and an existing infrared camera system, we developed an ultrasound-guided tracking and gating system. The system reconstructs tumour motion in room coordinates and facilitates the determination of gating levels based on tumour motion. The delay of the imaging system was investigated at various imaging settings and conditions with an in-house built motion phantom. We compared our system's delay to that of the currently existing kV x-ray imaging at various tumour motion speeds and found the two systems equivalent. Typical delays varied around 10+/-15 ms for both systems that translated into very good positional accuracy in imaging (<1 mm error). Gated beam delivery, based on gating levels determined with our system, also provided good results.

ISBN: 9780494342251Subjects--Topical Terms:

1019076
Health Sciences, Radiology.

Development and evaluation of an ultrasound-guided tracking and gating system for radiotherapy of liver metastases.
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520 $a Breathing gating systems can help increase tumour control probability and reduce normal tissue toxicity during stereotactic body radiotherapy of liver metastases. Using an ultrasound machine, a video processing computer and an existing infrared camera system, we developed an ultrasound-guided tracking and gating system. The system reconstructs tumour motion in room coordinates and facilitates the determination of gating levels based on tumour motion. The delay of the imaging system was investigated at various imaging settings and conditions with an in-house built motion phantom. We compared our system's delay to that of the currently existing kV x-ray imaging at various tumour motion speeds and found the two systems equivalent. Typical delays varied around 10+/-15 ms for both systems that translated into very good positional accuracy in imaging (<1 mm error). Gated beam delivery, based on gating levels determined with our system, also provided good results.
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