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Titolo:
Surveillance of peripheral arterial bypass grafts with three dimensional MR angiography: Comparison with digital subtraction angiography
Autore:
Bertschinger, K; Cassina, PC; Debatin, JF; Ruehm, SG;
Indirizzi:
Univ Zurich Hosp, Inst Diagnost Radiol, CH-8091 Zurich, Switzerland Univ Zurich Hosp Zurich Switzerland CH-8091 CH-8091 Zurich, Switzerland Univ Zurich Hosp, Dept Gen Surg, CH-8091 Zurich, Switzerland Univ Zurich Hosp Zurich Switzerland CH-8091 CH-8091 Zurich, Switzerland
Titolo Testata:
AMERICAN JOURNAL OF ROENTGENOLOGY
fascicolo: 1, volume: 176, anno: 2001,
pagine: 215 - 220
SICI:
0361-803X(200101)176:1<215:SOPABG>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNETIC-RESONANCE ANGIOGRAPHY; BREATH-HOLD; ANEURYSM CLIPS; VEIN; STENT; ARTIFACTS; ENDOPROSTHESES; ARTERIOGRAPHY; TITANIUM; REVISION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Debatin, JF Univ Hosp Essen, Inst Diagnost Radiol, Hufelandstr 55, D-45122Essen, Germany Univ Hosp Essen Hufelandstr 55 Essen Germany D-45122 Germany
Citazione:
K. Bertschinger et al., "Surveillance of peripheral arterial bypass grafts with three dimensional MR angiography: Comparison with digital subtraction angiography", AM J ROENTG, 176(1), 2001, pp. 215-220

Abstract

OBJECTIVE. The purpose of this study was to use contrast-enhanced three-dimensional MR angiography to assess the patency of peripheral arterial bypass grafts of the lower extremity. SUBJECTS AND METHODS. The study included 39 patients with 45 lower limb grafts. Twenty-eight were saphenous vein grafts, 13 were expanded polytetrafluoroethylene, and two were Dacron grafts. Digital subtraction angiography correlation was available for 30 patients (31 grafts). MR angiography was performed on a 1.5-T system with a multichannel quadrature phased array peripheral vascular coil. The scanning delay was determined with a test bolus technique, using half-time to maximum signal intensity in the graft. Arterialimaging was accomplished with two three-dimensional MR angiography acquisitions with gadopentetate dimeglumine administered using an automated injector. The pelvic and femoral arteries were imaged, the MR table was repositioned, and the lower limb arteries were imaged. The three-dimensional MR angiography sequence used the following parameters: TR/TE, 5.2/1.5 msec; inversion time, 28 msec; flip angle, 30 degrees. The proximal anastomosis, graft,and distal anastomosis were characterized as normal, stenosed, occluded, or ectatic or aneurysmatic. RESULTS. Sensitivity and specificity values for MR angiography regarding the assessment of grafts were 100% for 87 evaluable segments for which digital subtraction angiography correlation was available: stenosis (n = 10), occlusions (n = 9), ectasia or aneurysms (n = 8). Six segments could not be assessed because of the presence of intravascular stents or metallic clips. CONCLUSION. Contrast-enhanced three-dimensional MR angiography is well suited for the characterization of arterial grafts, for planning subsequent vascular interventions, and for excluding further lesions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 22:05:53