Abstract
In angiocardiography, the heart is pretty thick, while this angiography must be done in a very short time. Recently the permitted load of x-ray tube has been increased in quantity for continious photographing and the condition of angiocardiography would not be so strict. The authors examined time of exposure, the irradiated quantity, contrast of contrast medium and the method of indentification between the images whose contrast medium is different in density, in order to find the most suitable voltage for angiocardiography.
