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| The application of both SAFIRE and high-pitch dual-source computed tomography in pulmonary angiography |
| DONG Xia1, WU Zhi-feng2, E Lin-ning2, MENG Hui-qiang2, WU Shan2 |
| 1. Shanxi Medical University, Taiyuan 030001, China; 2. CT Room, Shanxi Da Yi Hospital, Taiyuan 030032, China |
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Abstract Objective: To evaluate sinogram affirmed iterative reconstruction technique based on raw data(SAFIRE) and high-pitch dual-source computed tomography on CT pulmonary angiography(CTPA) image quality meeting diagnostic requirements and radiation dose reduction. Methods: CTPA was preformed with three protococols: DSCT singal tube model(120 kV), high-pitch DSCT(100 kV), high-pitch DSCT(80 kV). For each protocol, 20 sex, age, and body-mass-index matched patients were identified. Retrospectively, two observers subjectively assessed image quality, measured CT attenuation(HU±SD) at seven central and peripheral levels, and calculated signal-to-noise-ratio(SNR) and contrast-to-noies-ratio(CNR). Radiation exposure parameters(CTDIvol and DLP) were compared. Using SPASS 16.0 statistical software to analyze data. Results: The three protocols did not significantly differ in image quality, neither by subjective, nor by objective measures(SNR, CNR). By contrast, radiation exposure differed between protocols: significant lower radiation was achieved by using high-pitch DSCT at 80 kV(P<0.001). Conclusion: Combined application of both SAFIRE and high-pitch DSCT can further reduce radiation dose on the base of image quality meeting diagnostic requirement.
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Received: 12 December 2013
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Corresponding Authors:
WU Zhi-feng
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2014, Vol. 25 
