Opening book details…
Can I read Intrafraction motion of the prostate during an IMRT session: a fiducial-based 3D measurement with Cone-beam CT on EtoBox?
Intrafraction motion of the prostate during an IMRT session: a fiducial-based 3D measurement with Cone-beam CT by Judit Boda-Heggemann; Frederick Marc Köhler; Hansjörg Wertz; Michael Ehmann; Brigitte Hermann; Nadja Riesenacker; Beate Küpper; Frank Lohr; Frederik Wenz is a Medicine article available to read on EtoBox.
What is Intrafraction motion of the prostate during an IMRT session: a fiducial-based 3D measurement with Cone-beam CT about?
## Background Image-guidance systems allow accurate interfractional repositioning of IMRT treatments, however, these may require up to 15 minutes. Therefore intrafraction motion might have an impact on treatment precision. 3D geometric data regarding intrafraction prostate motion are rare; we therefore assessed its magnitude with pre- and post-treatment fiducial-based imaging with cone-beam-CT (CBCT). ## Methods 39 IMRT fractions in 5 prostate cancer patients after ^125^I-seed implantation were evaluated. Patient position was corrected based on the ^125^I-seeds after pre-treatment CBCT. Immediately after treatment delivery, a second CBCT was performed. Differences in bone- and fiducial position were measured by seed-based grey-value matching. ## Results Fraction time was 13.6 ± 1.6 minutes. Median overall displacement vector length of ^125^I-seeds was 3 mm (M = 3 mm, Σ = 0.9 mm, σ = 1.7 mm; M: group systematic error, Σ: SD of systematic error, σ: SD of random error). Median displacement vector of bony structures was 1.84 mm (M = 2.9 mm, Σ = 1 mm, σ = 3.2 mm). Median displacement vector length of the prostate relative to bony structures was 1.9 mm (M = 3 mm, Σ = 1.3 mm, σ = 2.6 mm).
Who reads Intrafraction motion of the prostate during an IMRT session: a fiducial-based 3D measurement with Cone-beam CT?
It is typically read by researchers, students, and practitioners in Medicine.
- Author
- Judit Boda-Heggemann; Frederick Marc Köhler; Hansjörg Wertz; Michael Ehmann; Brigitte Hermann; Nadja Riesenacker; Beate Küpper; Frank Lohr; Frederik Wenz
- Publisher
- BioMed Central; Springer (Biomed Central Ltd.); [London]: BioMed Central, 2006-; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 1748-717X)
- Published
- 2008
- Language
- EN
- Field
- Medicine (Health Sciences)