Luedemann W, Brinker T, Schuhmann M U, von Brenndorf A I, Samii M
Department of Neurosurgery, Medical School Hannover, Germany.
Invest Radiol. 1998 Jul;33(7):421-4. doi: 10.1097/00004424-199807000-00008.
The authors evaluated the performance of direct magnification radiography (DIMA) with digital image processing for cerebral angiography in the rat.
A microfocal x-ray unit with a focal spot of 5 microns was used for cerebral angiography in 10 rats. The animals were examined form x 4 up to x 20 magnification after injection of 0.2 mL x-ray contrast medium into the common carotid artery.
Direct magnification radiography technology provides high resolution images and enables the visualization of very small vessels with high quality. It allows the peripheral branches of the middle cerebral artery or the ophthalmic artery to be visualized. Superimposition and noise effects can be excluded with digital subtraction and image processing.
The experiments show that DIMA radiography is a suitable technique for cerebral angiography in the rat.
作者评估了采用数字图像处理的直接放大血管造影术（DIMA）用于大鼠脑血管造影的性能。
使用一个焦点为5微米的微焦点X射线装置对10只大鼠进行脑血管造影。在向颈总动脉注射0.2毫升X射线造影剂后，对动物进行4倍至20倍放大检查。
直接放大血管造影技术可提供高分辨率图像，并能高质量地显示非常小的血管。它能使大脑中动脉或眼动脉的周边分支得以显示。通过数字减法和图像处理可排除叠加和噪声影响。
实验表明，DIMA血管造影术是一种适用于大鼠脑血管造影的技术。
