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《Journal of Clinical Radiology》 2007-11
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The MR Perfusing-weighted Imaging in Differentiating of Necrosis and Recurrence of Glioma after Radiotherapy

LIU Pengfei,NA Jing,WANG Xiaorui,et al.MR Division,the First Affiliated Hospital of Haerbin Medical University,Haerbin,Heilongjiang Province 150001,P.R.China  
Objective To evaluate MR perfusing weighted imaging in differentiating of necrosis and recurrence of glioma after radiotherapy.Materials and Methods 32 patients with glioma(18 cases with recurrence and 14 cases with necrosis) having radiotherapy after surgery had MR perfusion imaging and MR conventional imaging.The color map of CBV and CBF were obtained from perfusion data.The maximal rCBV and rCBF ratios of each lesion and the normal side grey were calculated.Results PWI in 18 cases with recurrence of glioma exhibited increased rCBV and rCBF ratios.The maximal rCBV and rCBF ratios of recurrence of glioma were 6.23±2.23,5.21±1.55 respectively,each of the mormal side grey were 3.26±1.03(P0.01),2.41±1.15(P0.01) respectively;PWI in 14 cases with necrosis after radiotherapy exhibited decreased rCBV and rCBF ratios.The maximal rCBV and rCBF ratios of necrosis of radiotherapy were 1.90±0.53,1.21±0.32 respectively,each of the mormal side grey(matter) were 4.26±1.13(P0.05),3.36±1.24(P0.05);The maximal rCBV and rCBF ratios of recurrence of glioma were statistically different from those of necrosis after radiotherapy(P0.01).There was obvious correlation between the maximal rCBV and rCBF ratios(r=0.795 P0.05).Conclusion MR perfusion imaging is useful in differentiating of necrosis and recurrence of glioma after radiotherapy,especially using the maximal rCBF ratio with the maximal rCBV ratio.
【Fund】: 黑龙江省科技攻关项目(编号:GC03C606-3);; 黑龙江省教育厅科技基金资助项目(编号:11511192)
【CateGory Index】: R739.4
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