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Technical Developments |
1 From the Departments of Radiology (C.N.H.E., D.E.K., T.H.W., M.T., S.H., B.H.), Internal Medicine I (A.C.B., G.B.), and Cardiovascular Surgery (L.P., P.D.), Charité, Humboldt-Universität Berlin, Schumannstrasse 20/21, 10098 Berlin, Germany. Received July 16, 1999; revision requested September 1; revision received January 7, 2000; accepted February 7. Address correspondence to C.N.H.E. (e-mail: christian.enzweiler@charite.de).
In 45 patients with coronary bypass grafts, the breath-hold interval with and that without preoxygenation was measured. Its effect on depiction of the distal graft anastomosis at electron-beam tomography was evaluated. Preoxygenation prolonged the breath-hold interval in most patients, thereby allowing greater anatomic coverage including more distal anastomoses. Preoxygenation may improve scanning of coronary bypass grafts and increase detectability of graft stenoses.
Index terms: Computed tomography (CT), electron beam, 54.12112, 54.12116, 54.12117, 54.12118, 54.12119 • Coronary angiography, comparative studies, 54.1244 • Coronary vessels, CT, 54.1211 • Coronary vessels, stenosis or obstruction, 54.754
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