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Titolo:
SLICE LOCATION DEPENDENCE OF AORTIC REGURGITATION MEASUREMENTS WITH MR PHASE-VELOCITY MAPPING
Autore:
CHATZIMAVROUDIS GP; WALKER PG; OSHINSKI JN; FRANCH RH; PETTIGREW RI; YOGANATHAN AP;
Indirizzi:
GEORGIA INST TECHNOL,SCH CHEM ENGN,INST BIOENGN & BIOSCI,CARDIOVASC FLUID MECH LAB ATLANTA GA 30332 GEORGIA INST TECHNOL,SCH CHEM ENGN,INST BIOENGN & BIOSCI,CARDIOVASC FLUID MECH LAB ATLANTA GA 30332 UNIV LEEDS,DEPT MECH ENGN LEEDS LS2 9JT W YORKSHIRE ENGLAND EMORY UNIV HOSP,DEPT RADIOL,FREDERIK PHILIPS MAGNET RESONANCE RES CTRATLANTA GA 30322 EMORY UNIV HOSP,DEPT CARDIOL ATLANTA GA 30322
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 4, volume: 37, anno: 1997,
pagine: 545 - 551
SICI:
0740-3194(1997)37:4<545:SLDOAR>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE FLOW MEASUREMENTS; VALVULAR REGURGITATION; MITRAL REGURGITATION; DOPPLER; SEVERITY; QUANTIFICATION; INSUFFICIENCY; ACCELERATION; ACCURACY; ORIFICE;
Keywords:
AORTIC REGURGITATION; REGURGITANT VOLUME; MAGNETIC RESONANCE PHASE VELOCITY MAPPING; AORTIC COMPLIANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
G.P. Chatzimavroudis et al., "SLICE LOCATION DEPENDENCE OF AORTIC REGURGITATION MEASUREMENTS WITH MR PHASE-VELOCITY MAPPING", Magnetic resonance in medicine, 37(4), 1997, pp. 545-551

Abstract

Although several methods have been used clinically to assess aortic regurgitation (AR), there is no ''gold standard'' for regurgitant volume measurement, Magnetic resonance phase velocity mapping (PVM) can be used for noninvasive blood flow measurements, To evaluate the accuracyof PVM in quantifying AR with a single imaging slice in the ascendingaorta, in vitro experiments were performed by using a compliant aortic model, Attention was focused on determining the slice location that provided the best results, The most accurate measurements were taken between the aortic valve annulus and the coronary ostia where the measured (Y) and actual (X) flow rate had close agreement (Y = 0.954 x + 0.126, r(2) = 0.995, standard deviation of error = 0.139 L/min), Beyond the coronary ostia, coronary flow and aortic compliance negatively affected the accuracy of the measurements, In vivo measurements taken on patients with AR showed the same tendency with the in vitro results, In making decisions regarding patient treatment, diagnostic accuracy isvery important, The results from this study suggest that higher accuracy is achieved by placing the slice between the aortic valve and the coronary ostia and that this is the region where attention should be focused for further clinical investigation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 06:45:19