Study of diffusion tensor imaging in necrotic brain tumors and abscess

SHI Rui-hua; QI Ming-chen; ZHAI Ren-you; QIAN Xiao-jun; LU Wan-hong; GU Hua

Journal of China Clinic Medical Imaging ›› 2006, Vol. 17 ›› Issue (8) : 421-424.

论著

Study of diffusion tensor imaging in necrotic brain tumors and abscess

SHI Rui-hua1, QI Ming-chen2, ZHAI Ren-you1, QIAN Xiao-jun1, LU Wan-hong1, GU Hua1

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Abstract

Objectives: To evaluate the diagnostic value of diffusion tensor imaging(DTI) in brain tumors with necrosis and abscesses. Materials and Methods?押 Nine brain abscesses, 12 glioblastomas, 10 metastases confirmed clinically or pathologically underwent conventional MRI and DTI. Average diffusion coefficient(ADC) value, fractional anisotropy(FA) value and map was calculated in the central portion. Results: On DTI, The abscesses displayed as hyperintense signal; but glioblastoma and metastasis all showed hypointense signal. On ADC map, the abscesses showed hypointense signal, the mean ADC value was (0.66±0.07)×10-3mm2/s, The difference between abscess and necrotic tumors was statistically significant(P=0.000<0.05); glioblastoma and metastasis all demonstrated as hyperintense signal. Abscess, glioblastoma, metastases and peri-edema all were depicted as hypointense signal on FA map. Conclusion: Abscesses show special hyperintense signal on DTI and have low ADC value. DTI is helpful in differentiating abscess from glioblastoma and metastasis.

Key words

brain neoplasms / brain abscess / diffusion magnetic resonance imaging / diagnosis / differential

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SHI Rui-hua;QI Ming-chen;ZHAI Ren-you;QIAN Xiao-jun;LU Wan-hong;GU Hua. Study of diffusion tensor imaging in necrotic brain tumors and abscess[J]. Journal of China Clinic Medical Imaging. 2006, 17(8): 421-424