Daily prostate volume and position monitoring using implanted gold markers and on-board imaging during radiotherapy

Title:

Daily prostate volume and position monitoring using implanted gold markers and on-board imaging during radiotherapy
Daily prostate volume and position monitoring using implanted gold markers and on-board imaging during radiotherapy

Creator:

Kašaová, Linda, Sirák, Igor, Jansa, Jan, Paluska, Petr, and Petera, Jiří

Contributor:

Kašaová, Linda, Sirák, Igor, Jansa, Jan, Paluska, Petr, and Petera, Jiří , 1959-

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:bmc12000861-65f80d91-3c5e-4f93-a9f4-ffb73e4f2363
uuid:bmc12000861-65f80d91-3c5e-4f93-a9f4-ffb73e4f2363
local:bmc12000861
http://www.lfhk.cuni.cz/Data/files/Casopisy/2011/2011_149.pdf
local: bmc12000861

Subject:

zaměřovací body pro radioterapii, zlato, lidé, mužské pohlaví, velikost orgánu--účinky záření, polohování pacienta, prostata--patologie--radiografie--účinky záření, nádory prostaty--radiografie--radioterapie, plánování radioterapie pomocí počítače, and počítačová rentgenová tomografie

Type:

model:article, article, Text, práce podpořená grantem, and TEXT

Format:

braille, text, and regular print

Description:

Purpose: This study aimed to evaluate prostate volume changes and prostate motions during radiotherapy.Methods: In 2010, twenty-five patients were treated for prostate cancer by external beam radiotherapy with implanted fiducial markers. Coordinates of three gold markers on kilovoltage images were calculated daily. Volume changes in target structure were observed through changes in intermarker distances. Differences in patient position between laser-tattoo alignment and gold marker localization were evaluated. Intrafraction motion was assessed by measuring marker displacement on kilovoltage images acquired before and after fraction delivery. Results: Prostate shrinkage was observed in 60% of patients. The average shrinkage was 7% of the prostate’s initial volume. Corrections after laser-tattoo alignment remained mostly below 1 cm. The difference between marker centroid position on the actual images and the planning images was 2 ± 1 mm on average. The extension of intrafraction movements was 7.6 ± 0.2 mm on average. Conclusions: In our retrospective study, the possibility for prostate volume changes during radiotherapy was revealed. Intrafraction movements turned out to be the limiting factor in safety margin reduction., Linda Kašaová, Igor Sirák, Jan Jansa, Petr Paluska, Jiří Petera, and Literatura 16

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Relation:

Acta medica (Hradec Králové)--MED00010947

Source:

Acta medica (Hradec Králové) | 2011 Volume:54 | Number:4

Harvested from:

CDK

Metadata only:

false

Date:

2011