Multiplane postmortem cerebral computed angiotomography, 2

The modified coronal, Towne (half-axial) and semisagittal CT planes were performed using 9 fresh cadavers. They received postmortem injection of contrast agents. Scanning planes were the modified 50 - 600 coronal, Towne (40 - 450 off the canthometal line), and the semisagittal (450 toward the sagittal plane). The main vascular structures visualized on the modified coronal CT plane resembled the antero-posterior view of the carotid angiogram. As for the demonstration of the lenticulostriate arteries or the Moyamoya vessels in clinical cases, the modified coronal plane is preferred to the axial one. On Towne plane, the vertebro-basilar arteries and the ascending portion of anterior cerebral artery were demonstrated as linear densities, which were demonstrated as spotty densities on the axial plane. On the semisagittal plane, the median or paramedian vasculatures of the main cerebral arteries and deep cerebral veins, were well demonstrated like a lateral view of carotid angiogram. Biplane or multiplane cerebral computed angiotomography will increase in clinical diagnostic value for understanding the anatomical relationship between the cerebral vessels and other intracranial lesions, and also will be applied to the screening of small vascular lesions. (J.P.N.)