AJNR. American journal of neuroradiology
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A case of isolated parenchymal venous varix not seen on angiography is reported. CT demonstrated a well-defined cystic lesion with peripheral enhancement deep within the left temporal lobe. MR demonstrated a high-signal-intensity lesion with hemosiderin rim.
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AJNR Am J Neuroradiol · Sep 1995
Radiating pain to the lower extremities caused by lumbar disk rupture without spinal nerve root involvement.
To locate the origin of the pain during lumbar diskography by means of a limited intradiskal injection of a local anesthetic. ⋯ Our results suggest that, in some patients with low back pain and unilateral or bilateral radiation to the lower extremities, the pain arises from within the disk. In these cases, pain radiating to the lower limb seems to be a referred type and seems unrelated to direct nerve root compression or irritation by a disk fragment in the epidural space.
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AJNR Am J Neuroradiol · Sep 1995
Use of transcranial cerebral oximetry to monitor regional cerebral oxygen saturation during neuroendovascular procedures.
Using transcranial cerebral oximetry, we monitored 30 patients who underwent cerebral angiography by the femoral route. Transcranial cerebral oximetry is a noninvasive technique of regional cerebral oxygen saturation measurement that uses near-infrared spectroscopy to differentiate oxyhemoglobin from reduced hemoglobin. ⋯ Acute and persistent decreases in oxygen saturation were associated with vascular complications and were detected before development of clinical symptoms. Greater changes in saturation were observed during several neuroendovascular procedures, indicating the development of complications, signaling a need to stop further endovascular manipulation.