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| The feasibility study on optimization of image quality of iliac vein MSCTV by gemstone spectral CT imaging technique |
| Department of Radiology, Taizhou Hospital Affiliated to Wenzhou Medical University, Linhai Zhejiang 317000, China |
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Abstract Objective: To investigate the application value of gemstone spectral CT single energy imaging technique to improve the image quality of indirect iliac vein MSCTV. Methods: Forty-four patients underwent iliac vein CT enhanced scanning by the GSI technique. 50 keV, 70 keV monochromatic images and the mixed energy images, and reconstructed images of iliac vein MPR, CPR, MIP were obtained. CT value, image noise and CNR of iliac vein were measured, and subjective scores of the original data and the image quality were evaluated by two senior radiologists at double-blinded. One-way ANOVA was used for statistical analysis. Kappa test was used for the consistency of subjective scores. Results: The CT value, image noise, CNR and subjective score of iliac vein of 50 keV monochromatic images were statistically higher than those of 70 keV images and the mixed energy images. The CT values of iliac vein were (220.72±27.90) HU, (112.76±13.42) HU and (115.55±12.80) HU, respectively. The values of image noise were (29.83±5.15), (15.25±2.73) and (18.46±3.05), respectively. The values of CNR were (4.55±1.74), (3.63±1.60) and (2.68±1.22), respectively. The differences of CT value, image noise and CNR were statistically significant among three groups(F=445.404, 178.996 and 16.356, P<0．01). The consistency of subjective scores for three groups among radiologists was good(Kappa=0.806, P<0.001). Conclusion: The gemstone spectral CT single energy imaging technique can significantly improve the image quality of indirect iliac vein MSCTV.
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Received: 09 June 2015
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