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Statements

Subject Item
n2:RIV%2F00179906%3A_____%2F12%3A10125062%21RIV13-MZ0-00179906
rdf:type
n12:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.ijrobp.2010.11.004
dcterms:description
Purpose: To investigate whether the use of magnetic resonance imaging (MRI) in prostate bed treatment planning could influence definition of the clinical target volume (CTV) and organs at risk. Methods and Materials: A total of 21 consecutive patients referred for prostate bed radiotherapy were included in the present retrospective study. The CTV was delineated according to the European Organization for Research and Treatment of Cancer recommendations on computed tomography (CT) and T(1)-weighted (T(1)w) and T(2)-weighted (T(2)w) MRI. The CTV magnitude, agreement, and spatial differences were evaluated on the planning CT scan after registration with the MRI scans. Results: The CTV was significantly reduced on the T(1)w and T(2)w MRI scans (13% and 9%, respectively) compared with the CT scans. The urinary bladder was drawn smaller on the CT scans and the rectum was smaller on the MRI scans. On T(1)w MRI, the rectum and urinary bladder were delineated larger than on T(2)w MRI. Minimal agreement was observed between the CT and T(2)w images. The main spatial differences were measured in the superior and superolateral directions in which the CTV on the MRI scans was 1.8-2.9 mm smaller. In the posterior and inferior border, no difference was seen between the CT and T(1)w MRI scans. On the T(2)w MRI scans, the CTV was larger in these directions (by 1.3 and 1.7 mm, respectively). Conclusions: The use of MRI in postprostatectomy radiotherapy planning resulted in a reduction of the CTV. The main differences were found in the superior part of the prostate bed. We believe T(2)w MRI enables more precise definition of prostate bed CTV than conventional planning CT. (C) 2012 Elsevier Inc. Purpose: To investigate whether the use of magnetic resonance imaging (MRI) in prostate bed treatment planning could influence definition of the clinical target volume (CTV) and organs at risk. Methods and Materials: A total of 21 consecutive patients referred for prostate bed radiotherapy were included in the present retrospective study. The CTV was delineated according to the European Organization for Research and Treatment of Cancer recommendations on computed tomography (CT) and T(1)-weighted (T(1)w) and T(2)-weighted (T(2)w) MRI. The CTV magnitude, agreement, and spatial differences were evaluated on the planning CT scan after registration with the MRI scans. Results: The CTV was significantly reduced on the T(1)w and T(2)w MRI scans (13% and 9%, respectively) compared with the CT scans. The urinary bladder was drawn smaller on the CT scans and the rectum was smaller on the MRI scans. On T(1)w MRI, the rectum and urinary bladder were delineated larger than on T(2)w MRI. Minimal agreement was observed between the CT and T(2)w images. The main spatial differences were measured in the superior and superolateral directions in which the CTV on the MRI scans was 1.8-2.9 mm smaller. In the posterior and inferior border, no difference was seen between the CT and T(1)w MRI scans. On the T(2)w MRI scans, the CTV was larger in these directions (by 1.3 and 1.7 mm, respectively). Conclusions: The use of MRI in postprostatectomy radiotherapy planning resulted in a reduction of the CTV. The main differences were found in the superior part of the prostate bed. We believe T(2)w MRI enables more precise definition of prostate bed CTV than conventional planning CT. (C) 2012 Elsevier Inc.
dcterms:title
Magnetic resonance imaging in postprostatectomy radiotherapy planning Magnetic resonance imaging in postprostatectomy radiotherapy planning
skos:prefLabel
Magnetic resonance imaging in postprostatectomy radiotherapy planning Magnetic resonance imaging in postprostatectomy radiotherapy planning
skos:notation
RIV/00179906:_____/12:10125062!RIV13-MZ0-00179906
n12:predkladatel
n13:ico%3A00179906
n4:aktivita
n10:I
n4:aktivity
I
n4:cisloPeriodika
2
n4:dodaniDat
n19:2013
n4:domaciTvurceVysledku
n6:2909448 n6:6885330 n6:9254692 n6:1166603 n6:5025125 n6:1380486 n6:8807337
n4:druhVysledku
n9:J
n4:duvernostUdaju
n8:S
n4:entitaPredkladatele
n15:predkladatel
n4:idSjednocenehoVysledku
147781
n4:idVysledku
RIV/00179906:_____/12:10125062
n4:jazykVysledku
n17:eng
n4:klicovaSlova
Computed tomography; Magnetic resonance imaging; Treatment planning; Radiotherapy; Prostate bed
n4:klicoveSlovo
n5:Radiotherapy n5:Treatment%20planning n5:Computed%20tomography n5:Magnetic%20resonance%20imaging n5:Prostate%20bed
n4:kodStatuVydavatele
NL - Nizozemsko
n4:kontrolniKodProRIV
[600138257268]
n4:nazevZdroje
International Journal of Radiation Oncology Biology Physics
n4:obor
n18:FD
n4:pocetDomacichTvurcuVysledku
7
n4:pocetTvurcuVysledku
12
n4:rokUplatneniVysledku
n19:2012
n4:svazekPeriodika
82
n4:tvurceVysledku
Mačingová, Zuzana Bělobrádek, Zdeněk Hoffmann, Petr Vošmik, Milan Šefrová, Jana Odrážka, Karel Doležel, Martin Broďák, Miloš Prošvic, Petr Nejedlá, Anna Paluska, Petr Louda, Miroslav
n4:wos
000299239900068
s:issn
0360-3016
s:numberOfPages
8
n16:doi
10.1016/j.ijrobp.2010.11.004