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Titolo:
Interobserver variability in the evaluation of chronic mesenteric ischemiawith gadolinium-enhanced MR angiography
Autore:
Carlos, RC; Stanley, JC; Stafford-Johnson, D; Prince, MR;
Indirizzi:
Univ Michigan, Dept Radiol, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 Dept Radiol, Ann Arbor, MI 48109 USA Univ Michigan, Robert Wood Johnson Clin Scholars Program, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 ars Program, Ann Arbor, MI 48109 USA Univ Michigan, Dept Surg, Ann Arbor, MI 48109 USA Univ Michigan Ann ArborMI USA 48109 , Dept Surg, Ann Arbor, MI 48109 USA Cornell Univ, Dept Radiol, New York, NY USA Cornell Univ New York NY USACornell Univ, Dept Radiol, New York, NY USA Univ Dublin, Dept Radiol, Dublin, Ireland Univ Dublin Dublin IrelandUniv Dublin, Dept Radiol, Dublin, Ireland
Titolo Testata:
ACADEMIC RADIOLOGY
fascicolo: 9, volume: 8, anno: 2001,
pagine: 879 - 887
SICI:
1076-6332(200109)8:9<879:IVITEO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE ANGIOGRAPHY; RENAL-ARTERY STENOSIS; CT ANGIOGRAPHY; VISCERAL ARTERIES; ABDOMINAL-AORTA; BLOOD-FLOW; DIAGNOSIS; DISEASE; ARTERIOGRAPHY; VESSELS;
Keywords:
chronic mesenteric ischemia; gadolinium-enhanced MR angiography; interobserver variability; technology assessment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Carlos, RC Univ Michigan, Dept Radiol, 1500 E Med Ctr Dr, Ann Arbor, MI 48109 USA Univ Michigan 1500 E Med Ctr Dr Ann Arbor MI USA 48109 8109 USA
Citazione:
R.C. Carlos et al., "Interobserver variability in the evaluation of chronic mesenteric ischemiawith gadolinium-enhanced MR angiography", ACAD RADIOL, 8(9), 2001, pp. 879-887

Abstract

Rationale and Objectives. The purpose of this study was to assess interobserver variability in the interpretation of gadolinium-enhanced magnetic resonance (MR) angiograms of splanchnic vessels in patients suspected of having chronic mesenteric ischemia (CMI). Materials and Methods. Two readers blinded to the initial interpretation retrospectively reviewed gadolinium-enhanced MR angiograms obtained for suspected CMI in 26 patients (20 women and six men; age range, 23-77 years; mean age, 61 years) who also underwent conventional angiography. Each reader graded the degree of stenosis based on the percentage diameter reduction of the celiac artery (CA), superior mesenteric artery (SMA), and inferior mesenteric artery (IMA) by using a five-point ordinal scale: 0, no stenosis; 1,mild stenosis (<50%); 2, moderate stenosis (50%-75%); 3, severe stenosis (>75%); 4, occluded artery. Using the conventional angiogram as a reference standard, authors determined sensitivity and specificity for each observer,assigning two thresholds (grades 2 and 3) as significant stenoses. A kappastatistic (kappa) measured interobserver agreement. Results. With grade 2 stenosis used as a threshold, cumulative accuracies for detecting significant stenosis were 0.95 (95% confidence interval, 0.86-0.99) for reader A and 0.97 (0.88-1.0) for reader B. Interobserver agreement for grading proximal splanchnic stenosis was 0.90 for CA, 0.92 for SMA, and 0.48 for IMA. Conclusion. Gadolinium-enhanced MR angiography is reproducibly accurate for detection of proximal splanchnic artery stenosis, with good to excellent interobserver agreement.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 00:32:16