| Siqi Yi,Peng Zhou,Yakun He,Changjiu He,Shibei Hu. The application study of dual-energy CT nonlinear blending technique in pulmonary angiography. Oncol Transl Med, 2023, 9: 22-27. |
| The application study of dual-energy CT nonlinear blending technique in pulmonary angiography |
| Received:December 18, 2021 Revised:February 14, 2023 |
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| KeyWord:dual-energy computed tomography (CT); CT pulmonary angiography (CTPA); non-linear blending (NLB); image quality; radiation dose |
| Author Name | Affiliation | E-mail | | Siqi Yi | Department of Radiology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, University of Electronic Science and Technology of China | 1872927483@qq.com | | Peng Zhou | Department of Radiology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, University of Electronic Science and Technology of China | | | Yakun He | Department of Radiology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, University of Electronic Science and Technology of China | | | Changjiu He | Department of Radiology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, University of Electronic Science and Technology of China | | | Shibei Hu | Department of Radiology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, University of Electronic Science and Technology of China | h13438823608@163.com |
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| Abstract: |
| Objective This study aimed to explore the feasibility of enhancing image quality in computed tomography
(CT) pulmonary angiography (CTPA) and reducing radiation dose using the nonlinear blending (NLB)
technique of dual-energy CT.
Methods A total of 61 patients scheduled for CTPA were enrolled, and 30 patients underwent dual-energy
scanning. Nonlinear blending images (NLB group) and three groups of linear blending images (LB group,
80 kV group, and 140 kV group) were reconstructed after scanning; 31 patients underwent single-energy
scanning (120 kV group). The CT values and standard deviations of the pulmonary trunk, left and right
pulmonary arteries, and ipsilateral back muscle at the bifurcation level of the left and right pulmonary
arteries were measured. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the five
groups were calculated. The subjective image quality of the five groups was assessed. The radiation doses
of the dual- and single-energy groups were recorded and calculated.
Results The CNR and SNR values of blood vessels in the NLB group were significantly higher than those
in the LB, 140 kV, and 80 kV groups (CNR of pulmonary artery trunk: t = 3.50, 4.06, 7.17, all P < 0.05; SNR
of pulmonary trunk: t = 3.76, 4.71, 6.92, all P < 0.05). There were no statistical differences in the CNR and
SNR values between the NLB group and 120 kV group (P > 0.05). The effective radiation dose of the dualenergy group was lower than that of the single-energy group (t = –4.52, P < 0.05). The subjective scores of
images in the NLB group were the highest (4.28 ± 0.74).
Conclusion The NLB technique of dual-energy CT can improve the image quality of CTPA and reduce
the radiation dose, providing more reliable imaging data for the clinical diagnosis of pulmonary embolism. |
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