Developmental venous anomalies: appearance on whole-brain CT digital subtraction angiography and CT perfusion
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Eric H. Hanson & Cayce J. Roach & Erik N. Ringdahl & Brad L. Wynn & Sean M. DeChancie & Nathan D. Mann & Alan S. Diamond & William W. Orrison Jr.
- چاپ و سال / کشور: 2011
Description
Introduction Developmental venous anomalies (DVA) consist of dilated intramedullary veins that converge into a large collecting vein. The appearance of these anomalies was evaluated on whole-brain computed tomography (CT) digital subtraction angiography (DSA) and CT perfusion (CTP) studies. Methods CT data sets of ten anonymized patients were retrospectively analyzed. Five patients had evidence of DVA and five age- and sex-matched controls were without known neurovascular abnormalities. CT angiograms, CT arterialvenous views, 4-D CT DSA and CTP maps were acquired on a dynamic volume imaging protocol on a 320-detector row CTscanner. Whole-brain CTP parameters were evaluated for cerebral blood flow (CBF), cerebral blood volume (CBV), time to peak (TTP), mean transit time (MTT), and delay. DSAwas utilized to visualize DVA anatomy. Radiation dose was recorded from the scanner console. Results Increased CTP values were present in the DVA relative to the unaffected contralateral hemisphere of 48%, 32%, and 26%; and for the control group with matched hemispheric comparisons of 2%, -10%, and 9% for CBF, CBV, and MTT, respectively. Average effective radiation dose was 4.4 mSv. Conclusion Whole-brain DSA and CTP imaging can demonstrate a characteristic appearance of altered DVA hemodynamic parameters and capture the anomalies in superior cortices of the cerebrum and the cerebellum. Future research may identify the rare subsets of patients at increased risk of adverse outcomes secondary to the altered hemodynamics to facilitate tailored imaging surveillance and application of appropriate preventive therapeutic measures.
Neuroradiology (2011) 53:331–341 DOI 10.1007/s00234-010-0739-9 Received: 22 April 2010 / Accepted: 23 June 2010 / Published online: 23 July 2010
