Comparison And Selection of Image Reconstruction with the Abdominal Artery Mixing Energy Spectrum Ct and Single-Energy Mode
Objective To compare the quality of image reconstruction with the abdominal artery mixing energy spectrum CT and single-energy mode, screen image reconstruction mode which is suitable to observe the abdominal artery. Methods 80 patients were treated with GE’s Gemstone CT imaging spectroscopy to obtain abdominal artery mixing energy image (140 kVp) and a single energy image within the scope of 40-140k eV. Measured CT value of the zone interested of mixed energy image and single image energy, and calculated abdominal aorta, and SNR and CNR of hepatic artery; each group of pictures do subjective image quality scores blinded by three experienced radiologists. Finally, Compared with the CT value of abdominal artery, SNR, CNR and subjective image quality scores. The data obtained use SPSS 19.0 software to do statistical analysis. Results: With the reduced of keV value, CT value of abdominal artery was gradually increased, while image noise changes. Comprehensive compared image of a single energy with image of mixed energy of each group based on objective image quality index (CT value, SNR and CNR) of the abdominal artery and subjective ratings, the results show image quality of a single energy group with 50-60 keV of abdominal artery is better than that of mixing energy group, while there are differences affect on image quality of the single energy imaging in the abdominal aorta and hepatic artery. Conclusion In different types of arterial reconstruction image obtained by conventional abdominal CT of abdomen spectrum enhanced scan, the image quality with 50-60 keV of single energy mode is superior to that of rebuild mode with mixing energy, as recommended by the abdominal artery spectrum of conventional CT scan in reconstruction mode .