Aortosonography — The Diagnostic Method of Choice
Ultrasonic aortography has been established in many institutions as the screening procedure of choice in patients suspected of having abdominal aortic aneurysms since it accurately displays the overall dimensions of the aneurysm. In several cases, a marked discrepancy has been observed between the internal lumen diameter as recorded by contrast aortography and by ultrasound. The ultrasonic measurements are generally larger and conform more closely to the actual overall dimensions than do those obtained by contrast aortography (roentgenographic or nuclear). It was hypothesized that this discrepancy was due to the presence of internal clot. Indocyanine green injections into the aortic lumen, while simultaneous ultrasonic scanning was performed, confirmed this hypothesis. By utilizing grey scale B-scan equipment, echoes were often recorded from the clot helping to differentiate it from the lumen. These clinical experiments suggest that aortosonography is a more accurate method of evaluating the overall dimensions of the abdominal aorta than either nuclear or roentgenographic aortography.
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