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Early Identification of Abnormal Regions in Rock-Mass Using Traveltime Tomography Article

Longjun Dong,Zhongwei Pei,Xin Xie,Yihan Zhang,Xianhang Yan

Engineering 2023, Volume 22, Issue 3,   Pages 191-200 doi: 10.1016/j.eng.2022.05.016

Abstract: To meet the high-accuracy detection requirements of underground engineering, this paper proposes a tomographymethod for abnormal region identification in complex rock-mass structures that utilizes traveltime tomographyThis paper not only realizes the application of abnormal region identification using traveltime tomography

Keywords： Underground engineering     Traveltime tomography     Complex structures     Abnormal region identification     Ray    

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Multislice computed tomography angiography in the diagnosis of cardiovascular disease: 3D visualizations

Zhonghua Sun

Frontiers of Medicine 2011, Volume 5, Issue 3,   Pages 254-270 doi: 10.1007/s11684-011-0153-7

Abstract: Multislice computed tomography (CT) has been widely used in clinical practice for the diagnosis of cardiovascular

Keywords： cardiovascular disease     multislice computed tomography     three-dimensional reconstruction     diagnosis     visualization    

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of plotting sensor sensitivity field and image reconstruction algorithm for electrical capacitance tomography

CHEN De-yun, YANG Cong-jing, ZHENG Gui-bin, YU Xiao-yang, SUN Li-juan

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2,   Pages 242-247 doi: 10.1007/s11465-006-0008-0

Abstract: Sensor sensitivity field in electrical capacitance tomography is affected by the distribution of multiphase

Keywords： multiphase     unequal interval     capacitance tomography     pattern     sensitivity    

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Ambient Noise Tomography for Coral Islands Article

Shaohong Xia, Changrong Zhang, Jinghe Cao

Engineering 2023, Volume 25, Issue 6,   Pages 182-193 doi: 10.1016/j.eng.2021.09.022

Abstract: While ambient noise tomography with dense arrays has been widely used in continental regions, its applicabilitynoise characteristics and obtained a 3D subsurface structure of the coral island using ambient noise tomographyOur research demonstrates that ambient noise tomography is a potentially economical, efficient, and environmentally

Keywords： Coral island     Ambient noise tomography     Engineering geology     South China Sea    

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properties of municipal solid waste incineration residues with cement and coal fly ash using X-ray Computed Tomography

Toshifumi MUKUNOKI, Ta Thi HOAI, Daisuke FUKUSHIMA, Teppei KOMIYA, Takayuki SHIMAOKA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 640-652 doi: 10.1007/s11709-018-0502-6

Abstract: Couple of industrial and micro-focus X-ray computed tomography (CT) scanners combined with an image analysisThree-dimension computed tomography images observation and analysis confirmed that solidified incineration

Keywords： waste incineration residues     coal fly ash     unconfined compression test     image analysis     X-Ray Computed Tomography    

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Simultaneous acquisition of CT angiography and whole brain CT perfusion images by using multiphase dynamic helical scan on 16 MDCT

Weiwei CHEN, Jianpin QI, Wenzhen ZHU, Wenhua HUANG, Jinmei SONG

Frontiers of Medicine 2009, Volume 3, Issue 2,   Pages 230-235 doi: 10.1007/s11684-009-0023-8

Abstract: We implemented a new protocol — multiphase dynamic helical scan to acquire CT angiography (CTA) and whole brain CT perfusion (CTP) images simultaneously with single scan on 16 multidetector CT (MDCT). A total of 90 patients who were randomly assigned into 3 groups were included in our study. Each group underwent CT scan by using the new protocol, traditional CTA and CTP protocol, respectively. The image quality of CTA, the CTP parameter values and the X-ray doses were measured and compared between the new protocol and the traditional protocols. There was no statistically significant difference in the CTA image quality between the above methods ( =0.55). For CTP parameters, the new protocol tended to overestimate the blood volume (BV) and blood flow (BF) value, and to underestimate the mean transit time (MTT) value compared with the traditional method. However, there was no statistically significant difference in BV, BF, and MTT value between the two methods except permeability surface (PS) ( >0.05). The volume CT dose index (CTDIvol) and dose length product (DLP) of our protocol were lower than the traditional one. The new protocol can obtain valuable diagnostic information in a shorter time without significant compromise in image quality. In addition, it reduces the radiation dose as well as contrast medium usage on the patient.

Keywords： computed tomography angiography     computed tomography perfusion    

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Fatigue of asphalt binder, mastic and mixture at low temperature

Dong WANG, Linbing WANG, Guoqing ZHOU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 166-175 doi: 10.1007/s11709-012-0157-7

Abstract: The fatigue damage is one of the most common distresses observed on the asphalt concrete pavement. To thoroughly understand the fatigue of asphalt concrete, the behaviors of the major components of asphalt concrete under cyclic loading are investigated respectively in this study. A new experiment method is developed to evaluate the performances of asphalt binder, mastic and fine aggregates mixture under cyclic tensile loading. The fatigue test results of asphalt binder show that the fatigue performance of asphalt binder is closely related with loading magnitude, temperature and loading rate. Mastic specimens with different filler content are tested and the results indicate that mastic specimens with 30% filler content show better fatigue resistance and higher permanent strain. The micro-structure analysis of mastic and mixture indicates that the fatigue resistance is closely related with the air void content of specimen. 3D digital specimens are developed to model the fatigue of the asphalt binder, mastic and mixture specimens based on the finite element method (FEM). Fatigue damage of asphalt concrete is simplified by a damage model. With proper selection of damage parameters, the simulation results agree well with laboratory test results and can be used as a basis for future fatigue research.

Keywords： fatigue     asphalt mixture     asphalt binder     mastic     finite element method (FEM)     X-ray tomography    

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Low-dose CT for lung cancer screening: opportunities and challenges

Hongbing Shen

Frontiers of Medicine 2018, Volume 12, Issue 1,   Pages 116-121 doi: 10.1007/s11684-017-0600-1

Abstract: However, minimal progress was achieved until recently, when low-dose spiral computed tomography (LDCT

Keywords： lung cancer     low-dose computerized tomography     early detection     opportunities     challenges    

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Quantitative proteomics revealed extensive microenvironmental changes after stem cell transplantation in ischemic stroke

Frontiers of Medicine 2022, Volume 16, Issue 3,   Pages 429-441 doi: 10.1007/s11684-021-0842-9

Abstract: Positron emission tomography imaging and neurological tests were applied to evaluate the metabolic and

Keywords： ischemic stroke     microenvironment     induced pluripotent stem cells (iPSCs)     positron emission tomography    

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F-FDG-PET glucose hypometabolism pattern in patients with epileptogenic hypothalamic hamartoma

Frontiers of Medicine 2021, Volume 15, Issue 6,   Pages 913-921 doi: 10.1007/s11684-021-0874-1

Abstract: HH (8 female patients; age, 2–33 years) by using 18F-fluorodeoxyglucose-positron emission tomographyThe correlations among tomography result, seizure type, sex, and structural magnetic resonance imaging

Keywords： hypothalamic hamartoma     gelastic seizure     fluorodeoxyglucose-positron emission tomography     voxel-based    

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Observation of premixed flame fronts by laser tomography

MU Kejin, WANG Yue, LEI Yu, ZHANG Zhedian, NIE Chaoqun, XIAO Yunhan

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 427-432 doi: 10.1007/s11708-008-0069-3

Abstract: The principle of combustion field detection by using laser tomography, as well as exploitation of thelaser tomography apparatus and the tool for image processing is described.An experiment detecting flame fronts by laser tomography was made by employing a V-shaped premixed flameflame fronts are precisely tracked through active contour models (ACM) from the digital images of laser tomography

Keywords： combustion     tomography apparatus     processing     exploitation     propagation    

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Characterization of 3D microstructure, thermal conductivity, and heat flow of cement-based foam using imaging technique

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 643-651 doi: 10.1007/s11709-021-0709-9

Abstract: Images were captured using X-ray micro computed tomography (micro-CT) imaging technique on cement-based

Keywords： 3D pore volume distribution     X-ray tomography     3D shape factor     heat flow    

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Experimental investigations of internal energy dissipation during fracture of fiber-reinforced ultra-high-performance concrete

Eric N. LANDIS, Roman KRAVCHUK, Dmitry LOSHKOV

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 190-200 doi: 10.1007/s11709-018-0487-1

Abstract: ultra-high-performance concrete (UHPC) was examined using two complementary techniques: X-ray computed tomography

Keywords： ultra-high-performance concrete     concrete fracture     X-ray computed tomography     acoustic emission    

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Early diagnosis and therapeutic choice of

Jing LI, Ying FU, Ji-Yao WANG, Chuan-Tao TU, Xi-Zhong SHEN, Lei LI, Wei JIANG

Frontiers of Medicine 2010, Volume 4, Issue 3,   Pages 308-316 doi: 10.1007/s11684-010-0103-9

Abstract: Nowadays, pyogenic liver abscess (PLA) is still a common and severe intra-abdominal infection, and had emerged as the most common pathogenic bacteria worldwide in the past ten years. Our study aims to achieve an early pathogenic diagnosis and rational therapy modality for liver abscess (KLA) through clinical data analysis. A total of 197 inpatients in Zhongshan Hospital, Shanghai, diagnosed as having liver abscess between March 2001 and September 2009 were enrolled. Patients with monomicrobial infection were divided into two groups: patients with liver abscess (KLA group, =106) and those with non- liver abscess (NKLA group, =56). A retrospective analysis was made between these two groups on the aspects of underlying diseases, clinical characteristics, laboratory data, culture results, and imaging findings. To evaluate the effects of different medical interventions, monomicrobial KLA patients were further divided into four subgroups (percutaneous liver aspiration, aspiration plus antibiotics flushing, aspiration plus retained catheter, and aspiration plus antibiotics flushing and retained catheter), and corresponding therapeutic effects were analyzed. KLA was more likely to occur in patients with coexisting diseases such as diabetes mellitus (53.77% 25.00%, =0.001) and hepatic adipose infiltration (16.04% 5.36%, =0.029). Compared to NKLA group, clinical characteristics including abdominal pain (40.57% 57.14%, =0.044), hypodynamia (19.81% 46.43%, =0.001), and hepatomegaly (4.72% 14.29%, =0.033) were much milder, but with a higher fasting blood glucose level (7.84?±?0.36 5.76?±?0.30, =0.001) on admission in KLA group. In addition, KLA abscess often appeared singly in the right lobe of the liver with gas forming nature (32.88% 13.51%, =0.039), unsmooth rim (71.23% 40.54%, =0.002), and dynamic septum enhancement (41.10% 16.22%, =0.009). Compared to mono aspiration subgroup, additional antibiotic flushing could not further improve clinical outcomes of KLA patients ( >0.05); however, the retained catheter showed obvious advantage in reducing abscess diameter (34.38?±?3.25 mm 22.67?±?2.37 mm, =0.017). It can be concluded that the strong association with diabetes, milder clinical symptoms, and gas-forming nature in CT images makes early pathogenic diagnosis of KLA possible. Comparatively, ultrasonography-guided percutaneous liver aspiration with retained catheter may be the most rational intervention modality of KLA.

Keywords： liver abscess     Klebsiella pneumoniae     computed tomography     therapy    

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Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 48-52 doi: 10.1007/s11465-018-0493-y

Abstract:

Three types of near-net shape casting aluminum parts were investigated by computed tomography to determineThis investigation demonstrated that computed tomography is an efficient method to determine casting

Keywords： casting     aluminum parts     casting defects     low pressure die casting     die casting     semi-solid casting     computed tomography    

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Title Author Date Type Operation

Early Identification of Abnormal Regions in Rock-Mass Using Traveltime Tomography

Longjun Dong,Zhongwei Pei,Xin Xie,Yihan Zhang,Xianhang Yan

Journal Article

Multislice computed tomography angiography in the diagnosis of cardiovascular disease: 3D visualizations

Zhonghua Sun

Journal Article

of plotting sensor sensitivity field and image reconstruction algorithm for electrical capacitance tomography

CHEN De-yun, YANG Cong-jing, ZHENG Gui-bin, YU Xiao-yang, SUN Li-juan

Journal Article

Ambient Noise Tomography for Coral Islands

Shaohong Xia, Changrong Zhang, Jinghe Cao

Journal Article

properties of municipal solid waste incineration residues with cement and coal fly ash using X-ray Computed Tomography

Toshifumi MUKUNOKI, Ta Thi HOAI, Daisuke FUKUSHIMA, Teppei KOMIYA, Takayuki SHIMAOKA

Journal Article

Simultaneous acquisition of CT angiography and whole brain CT perfusion images by using multiphase dynamic helical scan on 16 MDCT

Weiwei CHEN, Jianpin QI, Wenzhen ZHU, Wenhua HUANG, Jinmei SONG

Journal Article

Fatigue of asphalt binder, mastic and mixture at low temperature

Dong WANG, Linbing WANG, Guoqing ZHOU

Journal Article

Low-dose CT for lung cancer screening: opportunities and challenges

Hongbing Shen

Journal Article

Quantitative proteomics revealed extensive microenvironmental changes after stem cell transplantation in ischemic stroke

Journal Article

F-FDG-PET glucose hypometabolism pattern in patients with epileptogenic hypothalamic hamartoma

Journal Article

Observation of premixed flame fronts by laser tomography

MU Kejin, WANG Yue, LEI Yu, ZHANG Zhedian, NIE Chaoqun, XIAO Yunhan

Journal Article

Characterization of 3D microstructure, thermal conductivity, and heat flow of cement-based foam using imaging technique

Journal Article

Experimental investigations of internal energy dissipation during fracture of fiber-reinforced ultra-high-performance concrete

Eric N. LANDIS, Roman KRAVCHUK, Dmitry LOSHKOV

Journal Article

Early diagnosis and therapeutic choice of

Jing LI, Ying FU, Ji-Yao WANG, Chuan-Tao TU, Xi-Zhong SHEN, Lei LI, Wei JIANG

Journal Article

Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Journal Article