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Titolo:
Suitability of the Cordis Stabilizer (TM) marker guide wire for quantitative coronary angiography calibration: An in vitro and in vivo study
Autore:
Koning, G; Hekking, E; Kemppainen, JS; Richardson, GA; Rothman, MT; Reiber, JHC;
Indirizzi:
Leiden Univ, Med Ctr, Dept Radiol, NL-2300 RC Leiden, Netherlands Leiden Univ Leiden Netherlands NL-2300 RC NL-2300 RC Leiden, Netherlands Heart Core BV, Leiden, Netherlands Heart Core BV Leiden NetherlandsHeart Core BV, Leiden, Netherlands London Chest Hosp, London E2 9JX, England London Chest Hosp London England E2 9JX est Hosp, London E2 9JX, England Leiden Univ, Med Ctr, Dept Cardiol, NL-2300 RC Leiden, Netherlands Leiden Univ Leiden Netherlands NL-2300 RC NL-2300 RC Leiden, Netherlands
Titolo Testata:
CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS
fascicolo: 3, volume: 52, anno: 2001,
pagine: 334 - 341
SICI:
1522-1946(200103)52:3<334:SOTCS(>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Keywords:
calibration; catheter; guide wire; foreshortening; out-of-plane magnification; quantitative coronary angiography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Reiber, JHC Leiden Univ, Med Ctr, Dept Radiol, POB 9600, NL-2300 RC Leiden, Netherlands Leiden Univ POB 9600 Leiden Netherlands NL-2300 RC etherlands
Citazione:
G. Koning et al., "Suitability of the Cordis Stabilizer (TM) marker guide wire for quantitative coronary angiography calibration: An in vitro and in vivo study", CATHET C IN, 52(3), 2001, pp. 334-341

Abstract

Catheters usually ape used for calibration purposes in quantitative coronary angiography (QCA). The systematic and random errors in these calibrationfactors (CFs) are dependent on the size and quality of the catheters and limited by out-of-plane magnification (OPM). Theoretically, a guide wire with evenly spaced marker bands would solve many of these potential problems. For this reason, we tested the Cordis Stabilizer(TM) marker wire, featuring10 radiopaque platinum marker bands 15 mm apart, in in vitro and in vivo studies. To assess the effect of foreshortening, wires were positioned in a tube phantom; a centimeter grid was used as the gold standard. Radiographicimages were acquired at 5-inch and 7-inch image-intensifier sizes, 512(2) and 1,024(2) matrix sizes and angulations from 0 degrees to 70 degrees in steps of 10 degrees. It was concluded that the relative errors in CFs are less than 7% if the foreshortening angles remain less than 20 degrees. In DICOM images of 15 patients, 65 measurements were taken after calibration on an 8F catheter and on a guide wire positioned in the coronary lesion, In allbut two cases, the wire CFs were larger than the catheter CFs (relative difference, 24.7 +/- 19.6%). The measurements were divided into four groups: (I) no apparent OPM or foreshortening (n = 7), (II) only OPM (n = 4), (III)only foreshortening (n = 10), and (IV) the combination of both (n = 44). In group I (no OPM or foreshortening) the QCA results were similar using theguide wire or catheter as the calibration device (relative CF difference, 2.9% only). In group III the diameters were overestimated using the guide wire (obstruction diameter difference, 0.22 +/- 0.11 mm; reference diameter difference, 0.35 +/- 0.06 mm). For only OPM (group II) and the combination of OPM and foreshortening (group IV), the lesion length was underestimated on average by 2.4 mm using the catheter instead of the guide wire. In conclusion if accurate assessment of the lesion length is important, the marker wire should be used for calibration purposes. For vessel diameter measurements, the conventional catheter calibration approach is the method of choice. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 18:29:48