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Titolo:
Validation of a two- to three-dimensional registration algorithm for aligning preoperative CT images and intraoperative fluoroscopy images
Autore:
Penney, GP; Batchelor, PG; Hill, DLG; Hawkes, DJ; Weese, J;
Indirizzi:
Univ London Kings Coll, Guys Hosp, Div Radiol Sci, Computat Imaging Sci Grp, London SE1 9RT, England Univ London Kings Coll London England SE1 9RT p, London SE1 9RT, England Philips Res Labs, Div Tech Syst, D-22335 Hamburg, Germany Philips Res Labs Hamburg Germany D-22335 Syst, D-22335 Hamburg, Germany
Titolo Testata:
MEDICAL PHYSICS
fascicolo: 6, volume: 28, anno: 2001,
pagine: 1024 - 1032
SICI:
0094-2405(200106)28:6<1024:VOATTT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PORTAL IMAGES;
Keywords:
2D-3D image registration; similarity measures; image guided interventions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Penney, GP Univ London Kings Coll, Guys Hosp, Div Radiol Sci, Computat Imaging Sci Grp, London Bridge, London SE1 9RT, England Univ London Kings CollLondon Bridge London England SE1 9RT nd
Citazione:
G.P. Penney et al., "Validation of a two- to three-dimensional registration algorithm for aligning preoperative CT images and intraoperative fluoroscopy images", MED PHYS, 28(6), 2001, pp. 1024-1032

Abstract

We present a validation of an intensity based two- to three-dimensional image registration algorithm. The algorithm can register a CT volume to a single-plane fluoroscopy image. Four routinely acquired clinical data sets from patients who underwent endovascular treatment for an abdominal aortic aneurysm were used. Each data set was comprised of two intraoperative fluoroscopy images and a preoperative CT image. Regions of interest (ROI) were drawn around each vertebra in the CT and fluoroscopy images. Each CT image ROI was individually registered to the corresponding ROI in the fluoroscopy images. A cross validation approach was used to obtain a measure of registration consistency. Spinal movement between the preoperative and intraoperativescene was accounted fur by using two fluoroscopy images. The consistency and robustness of the algorithm when using two similarity measures, pattern intensity and gradient difference, was investigated. Both similarity measures produced similar results. The consistency values were rotational errors below 0.74 degrees and in-plane translational errors below 0.90 mm. These errors approximately relate to a two-dimensional projection error of 1.3 mm. The failure rate was less than 8.3% for three of the four data sets. However, for one of the data sets a much larger failure rate (28.5%) occurred. (C) 2001 American Association of Physicists in Medicine.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 07:02:13