Songhong Yue, Presenter: Nothing to Disclose

Junlin Zhou, Abstract Co-Author: Nothing to Disclose

To evaluate the value of dual energy spectral CT (DEsCT) in differentiating benign and malignant meningiomas.

Twenty-three patients with meningiomas underwent head CT scan with dual energy spectral mode (Discovery CT 750HD, GE healthcare)，all cases were proved by pathological findings. The patients included 16 cases of grade I meningioma (benign group) and 7 cases of grade Ⅱ or grade Ⅲ (malignant group). For each patient, 40keV-140keV monochromatic images (interval of 10kev) and iodine/water based material decomposition images were reconstructed. The CT value, iodine and water concentration of meningiomas during both phases were measured. The slope K of spectral HU curve was calculated according to the formula: K=(CT40keV- CT90keV)/40-90, student T test was performed for data comparison.

 (1) For arterial phase, the CT values of meningiomas in the low-keV monochromatic images (40keV-90keV) of benign group were lower than those of malignant group (each P<0.05), meanwhile, in the high-keV monochromatic images (90keV-140keV), the CT values had no significant difference (each P>0.05). For venous phase CT values in the each-keV monochromatic images (40keV-140keV) were not significant different (each P>0.05). (2) Slope K of spectral HU curve of malignant meningiomas was higher than that of benign group (P<0.05). (3) For both arterial and venous phase, the iodine and water concentrations of meningiomas in two groups had no significant difference ( P>0.05).    

The benign and the malignant meningiomas have distinct characteristics findings on dual energy spectral CT, and the spectral HU curve can be used to differentiate the benign the malignant meningiomas．

To evaluate the value of dual energy spectral CT (DEsCT) in differentiating benign and malignant meningiomas.

Yue, S, Zhou, J, The Value of Dual Energy Spectral CT in Differentiating Benign and Malignant Meningiomas.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14013473.html