Methodology for registration of distended recutms in pelvic CT studies

Rodríguez Vila, Borja; García Vicente, Feliciano y Gómez Aguilera, Enrique J. (2012). Methodology for registration of distended recutms in pelvic CT studies. "Medical Physics", v. 39 (n. 10); pp. 6351-6359. ISSN 978-953-307-518-1. https://doi.org/10.1118/1.4754798.

Descripción

Título: Methodology for registration of distended recutms in pelvic CT studies
Autor/es:
  • Rodríguez Vila, Borja
  • García Vicente, Feliciano
  • Gómez Aguilera, Enrique J.
Tipo de Documento: Artículo
Título de Revista/Publicación: Medical Physics
Fecha: Octubre 2012
Volumen: 39
Materias:
Palabras Clave Informales: non-rigid registration, distended rectum, pelvic CT
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Tecnología Fotónica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Purpose: Accurate delineation of the rectum is of high importance in off-line adaptive radiation therapy since it is a major dose-limiting organ in prostate cancer radiotherapy. The intensity-based deformable image registration (DIR) methods cannot create a correct spatial transformation if there is no correspondence between the template and the target images. The variation of rectal filling, gas, or feces, creates a noncorrespondence in image intensities that becomes a great obstacle for intensity-based DIR. Methods: In this study the authors have designed and implemented a semiautomatic method to create a rectum mask in pelvic computed tomography (CT) images. The method, that includes a DIR based on the demons algorithm, has been tested in 13 prostate cancer cases, each comprising of two CT scans, for a total of 26 CT scans. Results: The use of the manual segmentation in the planning image and the proposed rectum mask method (RMM) method in the daily image leads to an improvement in the DIR performance in pelvic CT images, obtaining a mean value of overlap volume index = 0.89, close to the values obtained using the manual segmentations in both images. Conclusions: The application of the RMM method in the daily image and the manual segmentations in the planning image during prostate cancer treatments increases the performance of the registration in presence of rectal fillings, obtaining very good agreement with a physician's manual contours.

Más información

ID de Registro: 16272
Identificador DC: http://oa.upm.es/16272/
Identificador OAI: oai:oa.upm.es:16272
Identificador DOI: 10.1118/1.4754798
URL Oficial: http://online.medphys.org/resource/1/mphya6/v39/i10/p6351_s1?isAuthorized=no
Depositado por: Memoria Investigacion
Depositado el: 10 Jul 2013 16:18
Ultima Modificación: 21 Abr 2016 16:34
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