STEREOSCOPIC DIGITAL SUBTRACTION ANGIOGRAPHY IN NEURORADIOLOGIC ASSESSMENT

  • 1 January 1985
    • journal article
    • research article
    • Vol. 6  (5) , 802-808
Abstract
Digital subtraction angiography (DSA) with stereoscopic imaging was performed in 40 patients for evaluation of a variety of cerebrospinal disorders. It was facilitated by a C-arm mounted X-ray tube and imaging chain with 7.degree. angulation between image pairs. Stereoscopic digital imaging proved particularly useful in the preoperative assessment of aneurysms, arteriovenous malformations and primary and metastatic tumors. The technique was also found to be useful as a real-time adjunct to therapeutic radiographic procedure, an aid in stereotaxic procedures and in follow-up of postsurgical patients. Although the i.v. route was occasionally used, especially in postoperative follow-up of aneurysms, the procedure was most often carried out via an intraarterial approach. Stereoscopy was useful in supplying depth information regarding the relations between lesions and surrounding normal and abnormal vasculature. This technique combines the demonstrated advantages of intraarterial DSA with the unique advantage of stereoscopic imaging to demonstrate 3-dimensional detail, thus contributing significantly to diagnostic confidence. Disadvantages are discussed. Further refinements in the equipment are expected: generation of stereo images with 1 injection, thus increasing procedure efficiency and patient safety; a video stereoscopic viewing unit; and the ability to obtain precise measurements via computer of depth, position, distance between and true size of objects.

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