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| Comparative study of image quality and accuracy of evaluation of left ventricular function between sinogram-affirmed iterative reconstruction and filtered back projection |
| Department of Radiology, the First Affiliated Hospital of China Medical University, Shenyang 110001, China |
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Abstract Objective: To compare the image quality and the accuracy of contrast computed tomography(CT) for left ventricular function assessment between sinogram-affirmed iterative reconstruction(SAFIRE) and filtered back projection(FBP). Methods: A total of 82 patients prospectively underwent cardiac examination with Dual-source CT and MRI(as reference standard) within 3 days. All CT images were reconstructed with FBP and SAFIRE techniques, respectively. All patients were divided into group A(BMI≤24 kg/m2, n=30) and group B(BMI＞24 kg/m2, n=52). The CT values and standard deviations of aorta and subcutaneous fat tissue were measured and SNRs and CNRs were calculated. Image quality was assessed for both reconstruction techniques. From these two different reconstruction images, ESV, EDV, SV and EF were determined using the Simpson’s method and compared with MRI. Paired-t test and Pearson’s correlation were used for statistical analysis. Results: The image noises on SAFIRE images decreased by 18.98% and 17.40% and SNRs/CNRs increased by 23.99%/32.54%(group A) and 22.07%/31.73%(group B) compared with FBP images, respectively(all P<0.001). There was no significantly overestimation and underestimation of EDV, ESV, SV and EF by FBP and SAFIRE compared to MRI(all P>0.05), respectively. All LV function measurements of CT images showed statistically intraclass correlations with MRI. Conclusion: SAFIRE may improve image quality. LV function measurements acquired by SAFIRE and FBP image data sets all were statistically related to MRI. The LV function results derived by SAFIRE images were more accurate.
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Received: 03 March 2015
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| Cite this article: |
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LI Pei-ling,JIANG Na,ZHAO Yu, et al. Comparative study of image quality and accuracy of evaluation of left ventricular function between sinogram-affirmed iterative reconstruction and filtered back projection[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2015, 26(12): 869-872.
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| URL: |
| http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2015/V26/I12/869 |
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