Ultrasound Imaging to Assess Inter- and Intra-fraction Motion during Bladder Radiotherapy and its Potential as a Verification Tool.

2.50
Hdl Handle:
http://hdl.handle.net/10541/69738
Title:
Ultrasound Imaging to Assess Inter- and Intra-fraction Motion during Bladder Radiotherapy and its Potential as a Verification Tool.
Authors:
McBain, Catherine A; Green, M M; Stratford, Julia; Davies, Julie; McCarthy, Claire; Taylor, Benjamin; McHugh, D; Swindell, Ric; Khoo, Vincent S; Price, Patricia M
Abstract:
AIMS: Organ motion is the principle source of error in bladder cancer radiotherapy. The aim of this study was to evaluate ultrasound bladder volume measurement as a surrogate measure of organ motion during radiotherapy: (1) to assess inter- and intra-fraction bladder variation and (2) as a potential treatment verification tool. MATERIALS AND METHODS: Twenty patients receiving radical radiotherapy for bladder cancer underwent post-void ultrasound bladder volume measurement at the time of radiotherapy treatment planning (RTP), and immediately before (post-void) and after receiving daily fractions. RESULTS: Ultrasound bladder volume measurement was found to be a simple and acceptable method to estimate relative bladder volume changes. Six patients showed significant changes to post-void bladder volume over the treatment course (P<0.05). The mean inter-fraction post-void bladder volume of five patients exceeded their RTP ultrasound bladder volume by more than 50%. Intra-fraction bladder volume increased on 275/308 (89%) assessed fractions, with the mean intra-fraction volume increases of seven patients exceeding their RTP ultrasound bladder volume by more than 50%. CONCLUSIONS: Both day-to-day bladder volume variation and bladder filling during treatment should be considered in RTP and delivery. Ultrasound may provide a practical daily verification tool by: supporting volume limitation as a method of treatment margin reduction; allowing detection of patients who may require interventions to promote bladder reproducibility; and identifying patients with prominent volume changes for the selective application of more advanced adaptive/image-guided radiotherapy techniques.
Affiliation:
Academic Department of Radiation Oncology, Christie Hospital NHS Trust, Manchester, UK.
Citation:
Ultrasound Imaging to Assess Inter- and Intra-fraction Motion during Bladder Radiotherapy and its Potential as a Verification Tool. 2009, 21 (5):385-93 Clin Oncol
Journal:
Clinical Oncology
Issue Date:
Jun-2009
URI:
http://hdl.handle.net/10541/69738
DOI:
10.1016/j.clon.2009.01.016
PubMed ID:
19282158
Type:
Article
Language:
en
ISSN:
0936-6555
Appears in Collections:
All Christie Publications ; Clinical Oncology; Academic Department of Radiation Oncology - ADRO

Full metadata record

DC FieldValue Language
dc.contributor.authorMcBain, Catherine A-
dc.contributor.authorGreen, M M-
dc.contributor.authorStratford, Julia-
dc.contributor.authorDavies, Julie-
dc.contributor.authorMcCarthy, Claire-
dc.contributor.authorTaylor, Benjamin-
dc.contributor.authorMcHugh, D-
dc.contributor.authorSwindell, Ric-
dc.contributor.authorKhoo, Vincent S-
dc.contributor.authorPrice, Patricia M-
dc.date.accessioned2009-06-04T14:38:05Z-
dc.date.available2009-06-04T14:38:05Z-
dc.date.issued2009-06-
dc.identifier.citationUltrasound Imaging to Assess Inter- and Intra-fraction Motion during Bladder Radiotherapy and its Potential as a Verification Tool. 2009, 21 (5):385-93 Clin Oncolen
dc.identifier.issn0936-6555-
dc.identifier.pmid19282158-
dc.identifier.doi10.1016/j.clon.2009.01.016-
dc.identifier.urihttp://hdl.handle.net/10541/69738-
dc.description.abstractAIMS: Organ motion is the principle source of error in bladder cancer radiotherapy. The aim of this study was to evaluate ultrasound bladder volume measurement as a surrogate measure of organ motion during radiotherapy: (1) to assess inter- and intra-fraction bladder variation and (2) as a potential treatment verification tool. MATERIALS AND METHODS: Twenty patients receiving radical radiotherapy for bladder cancer underwent post-void ultrasound bladder volume measurement at the time of radiotherapy treatment planning (RTP), and immediately before (post-void) and after receiving daily fractions. RESULTS: Ultrasound bladder volume measurement was found to be a simple and acceptable method to estimate relative bladder volume changes. Six patients showed significant changes to post-void bladder volume over the treatment course (P<0.05). The mean inter-fraction post-void bladder volume of five patients exceeded their RTP ultrasound bladder volume by more than 50%. Intra-fraction bladder volume increased on 275/308 (89%) assessed fractions, with the mean intra-fraction volume increases of seven patients exceeding their RTP ultrasound bladder volume by more than 50%. CONCLUSIONS: Both day-to-day bladder volume variation and bladder filling during treatment should be considered in RTP and delivery. Ultrasound may provide a practical daily verification tool by: supporting volume limitation as a method of treatment margin reduction; allowing detection of patients who may require interventions to promote bladder reproducibility; and identifying patients with prominent volume changes for the selective application of more advanced adaptive/image-guided radiotherapy techniques.en
dc.language.isoenen
dc.subjectBladder Motionen
dc.subjectRadiotherapyen
dc.subjectUltrasound Imagingen
dc.subjectVerificationen
dc.titleUltrasound Imaging to Assess Inter- and Intra-fraction Motion during Bladder Radiotherapy and its Potential as a Verification Tool.en
dc.typeArticleen
dc.contributor.departmentAcademic Department of Radiation Oncology, Christie Hospital NHS Trust, Manchester, UK.en
dc.identifier.journalClinical Oncologyen

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