Wang Mingyue, Presenter: Nothing to Disclose

Jianbo Gao MD, Abstract Co-Author: Nothing to Disclose

Zhou Yue, Abstract Co-Author: Nothing to Disclose

To evaluate the value of image fusion technology associated with monochromatic image of spectral CT

Twenty-four rabbits with VX2 liver tumors underwent spectral CT, On the 8th day after implantation. The conventional 140kVp polychromatic images (QC) and monochromatic images with energy level from 40 to 14o keV were generated. In the arterial phase the optimal CNR keV (OP) and 70keV were choosen and the fusion image (OP+70)keV was generated from OP plus 70keV. The tumor-to-liver contrast-to-noise ratio (CNR) and image noise 0f the four groups were calculated. The lesion conspicuity scores(LCS) and overall image quality scores(OQS) in the four groups were recorded.

The CNR of the group (OP+70) had no significant differences from that of the group OP, but the image noise of group (OP+70) was significantly lower than that of group OP (2.63±2.59vs2.81±2.74，p=0.288;9.12±1.28 vs7.89±1.35,p=0.002),the CNR of the OP and (OP+70) were significantly higher than that of group 70(1.92±2.39,p＜0.05)and group QC(1.95±2.55,p＜0.05), the image noise of group70 was the lowest(6.67±1.36) ,the image noise of group QC (9.71±1.30) had no significant differences from that of OP(p=0.125).LCS of (OP+70) had no significant differences from that of the group OP(3.77±0.57vs3.87±0.68,p=0.526) higher than that of 70(3.29±0.49)and QC(3.25±0.51),the group (OP+70) had the highest OQS(3.85±0.58 vs 3.44±0.40(OP)、3.10±0.25(70)、3.19±0.52(QC)，p＜0.05)

Image fusion technology associated with monochromatic image of spectral CT which combine the advantage of high CNR and the advantage of low noise, improve the lesion detection and image quality.

improve the lesion detection and image quality

Mingyue, W, Gao, J, Yue, Z, Spectral CT in Rabbit VX2 Liver Tumors: Image Fusion Technology Associated with Monochromatic Image.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14045561.html