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《Chinese Journal of Radiology》 2004-12
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The preliminary research on the quantitative perfusion measurement of meningioma by CT perfusion imaging

SHI Yu xin, XU Jian feng, CHI Ming ming Department of Radiology, Affiliated Hospital of Nantong University, Nantong 226001, China  
Objective To assess the contribution of CT perfusion in the quantitative diagnosis of meningiomas Methods The CT perfusion imaging was performed in 13 patients (including 2 recurrent meningiomas) by using Somatom Plus 4 helical CT The color map of relative cerebral blood volume (rCBV), relative cerebral blood flow (rCBF), and mean transit time (MTT) was obtained by perfusion software, and rCBF, rCBV, and MTT were calculated in different areas Then the perfusion parameters and its mean ratios between tumor and contralateral normal brain tissue (CNBT) in each group of different pathologic types of meningiomas were compared using an unpaired or a paired Student t test Results The rCBV, rCBF, and MTT of meningiomas were significantly higher than those of CNBT [rCBV:(16 125±12 135) ml/100 g vs (2 158±1 345) ml/100 g, P 0 002; rCBF: (89 627±63 193) ml -1 ·100 g -1 ·min -1 vs(25 599±9 266 ) ml -1 ·100 g -1 ·min -1 , P 0 002; MTT (9 203±4 434) s vs(3 857±2 290) s, P 0 001] The rCBV, rCBF, and MTT of atypical meningiomas ( n =7) were significantly higher than those of typical meningiomas ( n =4) [rCBV: (20 948±9 424) ml/100 g vs (4 015±2 454) ml/100 g, P 0 01; rCBF: (115 766±68 092) ml -1 ·100 g -1 ·min -1 vs (32 113±4 904) ml -1 ·100 g -1 ·min -1 , P 0 05; MTT: (10 352±3 744) s vs(4 685±0 912 ) s, P 0 01] The rCBV and rCBF of 2 cases with recurrent anaplastic meningiomas were not significantly different from those of atypical meningiomas( P 0 05) The characteristic time density curve (TDC) with high peaks was seen in 5 cases The rCBV and rCBF of 4 cases with peritumor brain edema were significantly lower than those of CNBT Conclusion CT perfusion imaging can not only provide quantitative information of meningiomas blood flow and show characteristic dynamic TDC, but also is useful in assessing pathology of tumor and demonstrating lower perfusion in peritumor brain edema and diagnosis of recurrent meningiomas
【CateGory Index】: R739.45
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