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The value of diffusion-weighted magnetic resonance imaging in gross tumor volume definition and tumor recurrence/metastasis prediction in nasopharyngeal carcinoma
ZHU Xiang-zhi*, KANG Zheng, HE Xia
*Department of Radiation Oncology, Jiangsu Province Tumor Hospital, Nanjing 210009,China
Abstract Objective To investigate the value of diffusion-weighted magnetic resonance imaging (DWMRI) in gross tumor volume definition and localregional recurrence/distant metastasis prediction in nasopharyngeal carcinoma (NPC). Methods From Jun.2008 to Feb.2011, each of 36 patients with or without localregional recurrence and/or distant metastasis treated by intensity-modulated radiotherapy in our hospital was matched in this study. The difference of apparent diffusion coefficient (ADC) values between these two groups was compared by t-test method. The conventional MRI and DWMRI before treatment were centrally reviewed to evaluated whether DWMRI would benefit to the definition of gross tumor volume. Results The mean ADC value were (0.753±0.091)×10－3 mm2/s and (0.793±0.094)×10－3 mm2/s in treatment failure group and control group, respectively (t=－1.79,P=0.078). The extension of gross tumor volume were much more outstanding in DWMRI when compared to conventional MRI. DWMRIpredicted localregional recurrence more accuracy than conventional MRI in one patient. Conclusions DWMRI is help to definition of gross tumor volume. The ADC value before radiotherapy can not predict the localregional recurrence and/or distant metastasis for nasopharyngeal carcinoma.
ZHU Xiang-zhi*,KANG Zheng,HE Xia. The value of diffusion-weighted magnetic resonance imaging in gross tumor volume definition and tumor recurrence/metastasis prediction in nasopharyngeal carcinoma[J]. Chinese Journal of Radiation Oncology, 2012, 21(2): 105-107.
ZHU Xiang-zhi*,KANG Zheng,HE Xia. The value of diffusion-weighted magnetic resonance imaging in gross tumor volume definition and tumor recurrence/metastasis prediction in nasopharyngeal carcinoma[J]. Chinese Journal of Radiation Oncology, 2012, 21(2): 105-107.
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2012, Vol. 21 
