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Titolo:
Comparison of algorithms for combining X-ray angiography images
Autore:
Kump, KS; Saidel, GM; Wilson, DL;
Indirizzi:
Univ Hosp Cleveland, Dept Radiol, Cleveland, OH 44106 USA Univ Hosp Cleveland Cleveland OH USA 44106 adiol, Cleveland, OH 44106 USA Case Western Reserve Univ, Dept Biomed Engn, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 Cleveland, OH 44106 USA
Titolo Testata:
IEEE TRANSACTIONS ON MEDICAL IMAGING
fascicolo: 8, volume: 20, anno: 2001,
pagine: 742 - 750
SICI:
0278-0062(200108)20:8<742:COAFCX>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIGITAL SUBTRACTION ANGIOGRAPHY; BLOOD-FLOW; REGISTRATION; FLUOROSCOPY;
Keywords:
contrast agent; image processing; medical imaging; X-ray angiography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Engineering, Computing & Technology
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Wilson, DL Case Western Reserve Univ, Dept Biomed Engn, Cleveland, OH 44106 USA Case Western Reserve Univ Cleveland OH USA 44106 OH 44106 USA
Citazione:
K.S. Kump et al., "Comparison of algorithms for combining X-ray angiography images", IEEE MED IM, 20(8), 2001, pp. 742-750

Abstract

Using a one-dimensional convective-dispersive model of contrast agent flowin a blood vessel, we optimized and compared algorithms for combining a temporal sequence of X-ray angiography images, each with incomplete arterial filling, into a single-output image with fully opacified arteries. The fouralgorithms were: maximum opacity (MO) with a maximum over time at each spatial location; matched filtering (MAT); recursive filtering (REC) with a maximum opacity; and an approximate matched filter (AMF) consisting of a correlation with a kernel that approximates the matched filter kernel followed by a maximum opacity operation. Based on the contrast-to-noise ratio (CNR),MAT is theoretically the best algorithm. However, with spatially varying clinical images, a poorly matched MAT kernel greatly degraded CNR to the point of even inverting artery contrast. The practical AMF method maintained uniform CNR values over the entire field of view and gave >90% of the theoretical limit set by MAT REC and MO created fully opacified arteries, but provided little CNR enhancement. By holding CNR at a nominal reference value, simulations predicted that AMF could be used with a contrast agent volume reduced by as much as 66%. Alternatively, X-ray exposure rate could be lowered. Although MO and REC are more easily implemented, the contrast enhancement with AMF makes it attractive for processing diagnostic angiography images acquired with a reduced contrast agent dose.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 01:37:42