Cardiac computed tomography (cardiac CT) and echocardiography provide noninvasive diagnosis of cardiac lesions by direct demonstration of the myocardium and the individual cavities of the heart. Myocardial thickness, and the size and shape of heart cavities are easily demonstrated. In patients with coronary heart disease proved by levocardiography, cardiac CT gave a true negative rate of 82.3% (echocardiography 82.9%) and a true positive rate of 90.8% (echocardiography 82.7%). In the assessment of coronary bypass graft patency, cardiac CT was accurate in 89.6% of studies confirmed by angiography.

Staging was undertaken in 118 patients with primary lymph node neoplasms; the sensitivity of computer tomography in the paraaortic region was 80%, that of lymphography 89%. Specificity of computer tomography was 93%, of lymphography 95%. In the iliac region, sensitivity was 81% (CT) and 90% (lymphography), and specificity was 90% (CT) and 97% (Lymphography). The value of computer tomography should, however, be stressed, since it can demonstrate lymph nodes not shown by lymphography, including those in the mediastinum, as well as lesions in the spleen, liver and lungs.

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A linear array colour Doppler sonographic method was used experimentally on a vessel phantom in order to determine flow velocity, and the results were compared with DSA. Both the Doppler and the DSA method showed very good agreement with true velocities (r greater than 0.97). The Doppler method underestimated flow velocity. Early clinical results indicate that colour Doppler sonography is able, at the same time, to demonstrate morphology and function (direction flow and flow velocity) of significant vascular abnormalities by a non-invasive method.