A contour-guided deformable image registration algorithm for adaptive radiotherapy

Xuejun Gu, Bin Dong, Jing Wang, John Yordy, Loren Mell, Xun Jia, Steve B. Jiang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

In adaptive radiotherapy, deformable image registration is often conducted between the planning CT and treatment CT (or cone beam CT) to generate a deformation vector field (DVF) for dose accumulation and contour propagation. The auto-propagated contours on the treatment CT may contain relatively large errors, especially in low-contrast regions. A clinician's inspection and editing of the propagated contours are frequently needed. The edited contours are able to meet the clinical requirement for adaptive therapy; however, the DVF is still inaccurate and inconsistent with the edited contours. The purpose of this work is to develop a contour-guided deformable image registration (CG-DIR) algorithm to improve the accuracy and consistency of the DVF for adaptive radiotherapy. Incorporation of the edited contours into the registration algorithm is realized by regularizing the objective function of the original demons algorithm with a term of intensity matching between the delineated structures set pairs. The CG-DIR algorithm is implemented on computer graphics processing units (GPUs) by following the original GPU-based demons algorithm computation framework (Gu et al 2010 Phys Med Biol. 55 207-219). The performance of CG-DIR is evaluated on five clinical head-and-neck and one pelvic cancer patient data. It is found that compared with the original demons, CG-DIR improves the accuracy and consistency of the DVF, while retaining similar high computational efficiency.

Original languageEnglish (US)
Pages (from-to)1889-1901
Number of pages13
JournalPhysics in Medicine and Biology
Volume58
Issue number6
DOIs
StatePublished - Mar 21 2013

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Radiotherapy
Pelvic Neoplasms
Computer Graphics
Cone-Beam Computed Tomography
Neck
Therapeutics
Head
Efficiency

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

A contour-guided deformable image registration algorithm for adaptive radiotherapy. / Gu, Xuejun; Dong, Bin; Wang, Jing; Yordy, John; Mell, Loren; Jia, Xun; Jiang, Steve B.

In: Physics in Medicine and Biology, Vol. 58, No. 6, 21.03.2013, p. 1889-1901.

Research output: Contribution to journalArticle

Gu, Xuejun ; Dong, Bin ; Wang, Jing ; Yordy, John ; Mell, Loren ; Jia, Xun ; Jiang, Steve B. / A contour-guided deformable image registration algorithm for adaptive radiotherapy. In: Physics in Medicine and Biology. 2013 ; Vol. 58, No. 6. pp. 1889-1901.
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