| 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. |
| 双能量CT非线性融合技术在肺动脉成像中的应用研究 |
| The application study of dual-energy CT nonlinear blending technique in pulmonary angiography |
| Received:December 18, 2021 Revised:February 14, 2023 |
| DOI：10.1007/s10330-021-0544-4 |
| 中文关键词: 双能量CT；肺动脉CT血管成像；非线性融合；图像质量；辐射剂量 |
| 英文关键词: dual-energy computed tomography (CT); CT pulmonary angiography (CTPA); non-linear blending (NLB); image quality; radiation dose |
| 基金项目:Supported by a grant from the Science and Technology Plan of Sichuan Province (No. 2021YFS0225) and the Science and Technology Plan of Chengdu (No. 2021-YF05-01507-SN). |
| 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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| 中文摘要: |
| 目的 探讨双能量CT非线性融合技术（Non-linear blending, NLB）提高肺动脉CT血管成像（CT Pulmonary Angiography, CTPA）图像质量和降低辐射剂量的可行性。方法 收集61例拟行CTPA的患者，30例行双能量成像，回顾性重建非线性融合图像（NLB组）和三组线性融合图像（LB组、80kV组、140kV组）；31例行单能量成像(120kV组)，分别测量左右肺动脉分叉水平的肺动脉干、左右肺动脉以及同侧背部肌肉的的CT值和标准差。计算以上五组图像的信噪比（Signal-to-noise ratio, SNR）和对比信噪比（Contrast signal-to-noise ratio, CNR），并对图像质量进行主观评分。记录并计算双能组和单能组的辐射剂量。结果 NLB组血管的CNR和SNR值均高于LB、140kV和80kV组，差异均有统计学意义（肺动脉干处CNR：t=3.50、9.04、4.21，P<0.05；肺动干处SNR：t=3.76、9.60、4.92，P<0.05）。NLB组的CNR和SNR值与120kV组相比差异均无统计学意义（P均>0.05）。双能组有效辐射剂量明显低于单能组（t=-4.52，P<0.05）。NLB组图像主观评分最高为4.3±0.73。结论 双能量CT的NLB技术能提高CTPA图像质量并降低辐射剂量,为肺栓塞的临床诊断提供了更可靠的影像学资料。 |
| 英文摘要: |
| 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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