Abstract
Intravenous subtraction radiography using Technicare DR 960 has been performed in the Department of Diagnostic Radiology and Nuclear Medicine, National Medical Center Hospital. All procedures are based on the non-invasive technique, i. e. with a 5 cm long, 19 gauge cannula in the ante-cubital_ vein, and a small amount of contrast material, usually 20 to 40 ml.
Image quality was evaluated and was almost always inferior to the conventional method of catheter selective angiography. However, the information obtained by D. S. R. was useful for the clear, coronal views of the vessels.
Thirteen cases of thoracic aneurysms and 15 cases of abdominal aneurysms were stud-ied with this non-invasive technique. The point of intimal tear at proximal lesion was always visualised clearly. But the complete tear end of distal margin was sometimes obscure.
All these patients were outpatients and there were no complications so far. The halo like shadow which might indicate the site of false lumen was identified in the cases of abdominal aneurysms.
Thus, this non-invasive equipment should be installed in National Hospitals in which very few staff doctors are available.
