Dual-energy spectral CT imaging of pulmonary embolism with Mycoplasma pneumoniae pneumonia in children

2022 ◽  
Author(s):  
Lixin Yang ◽  
Jihang Sun ◽  
Jianying Li ◽  
Yun Peng
Keyword(s):  
Pulmonary Embolism ◽  
Mycoplasma Pneumoniae ◽  
Dual Energy ◽  
Ct Imaging ◽  
Spectral Ct ◽  
Mycoplasma Pneumoniae Pneumonia

scholarly journals Dual energy spectral CT imaging of pulmonary embolism with Mycoplasma pneumoniae pneumonia in children

2020 ◽  
Author(s):  
Lixin Yang ◽  
Jihang Sun ◽  
Jiangying Li ◽  
Tong Yu ◽  
Bei Wang ◽  
...  
Keyword(s):  
Pulmonary Embolism ◽  
Mycoplasma Pneumoniae ◽  
Iodine Concentration ◽  
Pulmonary Angiography ◽  
Dual Energy ◽  
Normal Lung ◽  
Spectral Ct ◽  
Significant Difference ◽  
Perfusion Defects ◽  
Mycoplasma Pneumoniae Pneumonia

Abstract Background: Pulmonary embolism (PE) associated with Mycoplasma pneumoniae pneumonia (MPP) in children has already attracted more attention. We aimed to evaluate the application of dual-energy spectral CT in diagnosing PE in children with MPP.Methods: Eight-three children with MPP and highly suspected PE, underwent CT pulmonary angiography (CTPA) with spectral imaging mode. Noise, clot-to-artery contrast-to-noise ratio, image quality and diagnosis confidence were calculated and assessed on nine monochromatic image sets (40 to 80keV). CTPA images were observed for the presence, localization, and embolic degrees of PE. Emboli were divided between intra and extra-consolidation. For extra-consolidation clots, iodine concentration (IC) of perfusion defects and normal lung, perfusion defects of 4 children before and after the treatment were measured and compared. For intra-consolidation clots, IC of consolidation areas with clots and consolidation areas without clot were measured and compared.Results: The optimal energy level for detecting PE in children was 55 keV. 116 clots (29 extra consolidations) were found in 25 children, IC of defect regions associated with PE was 0.69±0.28mg/mL (extra-consolidations) and 0.90±0.23mg/mL (intra-consolidations), both significantly lower than the 2.76±0.45mg/mL in normal lungs and 10.25±1.76mg/mL in consolidations without clots (P<0.001). Significant difference was found in the presence or absence of perfusion defects between occlusive clots and nonocclusive clots(P<0.001). IC of the perfusion defects significantly increased after treatment (P<0.001).Conclusions: In spectral CTPA 55 keV images optimize PE detection for children. and MD images quantify pulmonary blood flow of PE, and may help to detect small clots and quantify embolic degrees.

Dual energy spectral CT imaging for the evaluation of small hepatocellular carcinoma microvascular invasion

2017 ◽  
Vol 95 ◽  
pp. 222-227 ◽  
Author(s):  
Chuang-bo Yang ◽  
Shuang Zhang ◽  
Yong-jun Jia ◽  
Yong Yu ◽  
Hai-feng Duan ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Dual Energy ◽  
Ct Imaging ◽  
Microvascular Invasion ◽  
Small Hepatocellular Carcinoma ◽  
Spectral Ct

Dual energy spectral CT imaging of insulinoma—Value in preoperative diagnosis compared with conventional multi-detector CT

2012 ◽  
Vol 81 (10) ◽  
pp. 2487-2494 ◽  
Author(s):  
Xiao Zhu Lin ◽  
Zhi Yuan Wu ◽  
Ran Tao ◽  
Yan Guo ◽  
Jian Ying Li ◽  
...  
Keyword(s):  
Preoperative Diagnosis ◽  
Dual Energy ◽  
Ct Imaging ◽  
Spectral Ct

Optimize non-contrast head CT imaging tasks using multiple virtual monochromatic image sets in dual-energy spectral CT

2020 ◽  
Vol 28 (2) ◽  
pp. 345-356
Author(s):  
Xiaohu Li ◽  
Zhijie Li ◽  
Jianying Li ◽  
Jian Song ◽  
Yongqiang Yu ◽  
...  
Keyword(s):  
Dual Energy ◽  
Ct Imaging ◽  
Spectral Ct ◽  
Head Ct ◽  
Monochromatic Image ◽  
Virtual Monochromatic Image

Improving diagnostic accuracy for arteries of lower extremities with dual-energy spectral CT imaging

2020 ◽  
Vol 128 ◽  
pp. 109061
Author(s):  
Xiaoqian Jia ◽  
Xianjun Li ◽  
Jianying Li ◽  
Qian Tian ◽  
Yue Yao ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Lower Extremities ◽  
Dual Energy ◽  
Ct Imaging ◽  
Spectral Ct

Iterative dynamic dual-energy CT algorithm in reducing statistical noise in multi-energy CT imaging

2021 ◽  
Author(s):  
Yidi Yao ◽  
Liang Li ◽  
Zhiqiang Chen
Keyword(s):  
Noise Level ◽  
Photon Counting ◽  
Reconstruction Algorithm ◽  
Dual Energy ◽  
Ct Imaging ◽  
Dual Energy Ct ◽  
Spectral Ct ◽  
Photon Counting Detectors ◽  
Ct Data ◽  
Statistical Noise

Abstract Multi-energy spectral CT has a broader range of applications with the recent development of photon-counting detectors. However, the photons counted in each energy bin decrease when the number of energy bins increases, which causes a higher statistical noise level of the CT image. In this work, we propose a novel iterative dynamic dual-energy CT algorithm to reduce the statistical noise. In the proposed algorithm, the multi-energy projections are estimated from the dynamic dual-energy CT data during the iterative process. The proposed algorithm is verified on sufficient numerical simulations and a laboratory two-energy-threshold PCD system. By applying the same reconstruction algorithm, the dynamic dual-energy CT's final reconstruction results have a much lower statistical noise level than the conventional multi-energy CT. Moreover, based on the analysis of the simulation results, we explain why the dynamic dual-energy CT has a lower statistical noise level than the conventional multi-energy CT. The reason is that: the statistical noise level of multi-energy projection estimated with the proposed algorithm is much lower than that of the conventional multi-energy CT, which leads to less statistical noise of the dynamic dual-energy CT imaging.

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