Filters








112 Hits in 3.8 sec

Convolution Neural Networks and Support Vector Machines for Automatic Segmentation of Intracoronary Optical Coherence Tomography

Caining Zhang, Huaguang Li, Xiaoya Guo, David Molony, Xiaopeng Guo, Habib Samady, Don P. Giddens, Lambros Athanasiou, Rencan Nie, Jinde Cao, Dalin Tang
2019 MCB Molecular and Cellular Biomechanics  
Optical coherence tomography (OCT) is a recently developed intravascular imaging technique with high resolution approximately 10 microns and could provide accurate quantification of coronary plaque morphology  ...  To overcome these limitations, two automatic segmentation methods for intracoronary OCT image based on support vector machine (SVM) and convolutional neural network (CNN) were performed to identify the  ...  Optical coherence tomography (OCT) is a recently emerged advanced intravascular imaging technique which has high resolution approximately 10 microns and could provide accurate morphology for coronary plaques  ... 
doi:10.32604/mcb.2019.06873 fatcat:gkgrj3hsxzdx5lagsti7hphdfa

Intravascular Optical Imaging Technology for Investigating the Coronary Artery

Melissa J. Suter, Seemantini K. Nadkarni, Giora Weisz, Atsushi Tanaka, Farouc A. Jaffer, Brett E. Bouma, Guillermo J. Tearney
2011 JACC Cardiovascular Imaging  
The optical imaging modalities discussed include angioscopy, optical coherence tomography, polarization sensitive-optical coherence tomography, laser speckle imaging, near-infrared spectroscopy, time-resolved  ...  There is an ever-increasing demand for new imaging methods that can provide additional information about the coronary wall to better characterize and stratify high-risk plaques, and to guide interventional  ...  Acknowledgments The authors gratefully acknowledge the contributions of Yasunori Ueda, James A. Goldstein, James F. Brennan, and Laura Marcu.  ... 
doi:10.1016/j.jcmg.2011.03.020 pmid:21920342 pmcid:PMC3583353 fatcat:26sezqveangyrpuyt7bif44wey

Histopathology-Based Deep-Learning Predicts Atherosclerotic Lesions in Intravascular Imaging

Olle Holmberg, Tobias Lenz, Valentin Koch, Aseel Alyagoob, Léa Utsch, Andreas Rank, Emina Sabic, Masaru Seguchi, Erion Xhepa, Sebastian Kufner, Salvatore Cassese, Adnan Kastrati (+3 others)
2021 Frontiers in Cardiovascular Medicine  
for segmentation of atherosclerotic lesions.  ...  We trained a deep-learning algorithm (DeepAD) with co-registered, annotated histopathology to predict atherosclerotic lesions in optical coherence tomography (OCT).Methods: Two datasets were used for training  ...  of intracoronary optical coherence tomography in detecting atherosclerotic lesions.  ... 
doi:10.3389/fcvm.2021.779807 pmid:34970608 pmcid:PMC8713728 fatcat:llcqi7mtcvfivcteg4wbozn3a4

Machine Learning Model Comparison for Automatic Segmentation of Intracoronary Optical Coherence Tomography and Plaque Cap Thickness Quantification

Caining Zhang, Xiaopeng Guo, Xiaoya Guo, David Molony, Huaguang Li, Habib Samady, Don P. Giddens, Lambros Athanasiou, Dalin Tang, Rencan Nie, Jinde Cao
2020 CMES - Computer Modeling in Engineering & Sciences  
Optical coherence tomography (OCT) is a new intravascular imaging technique with high resolution and could provide accurate morphological information for plaques in coronary arteries.  ...  The average errors of U-Net, FC-DenseNet and SVM from the 18 slices for cap thickness quantification were 8.83%, 10.71% and 15.85%.  ...  As an emerging imaging modality, optical coherence tomography (OCT) has a high resolution of approximately 10 µm.  ... 
doi:10.32604/cmes.2020.09718 fatcat:mgudw6blqvgi3n44kch7nv3o4y

Intracoronary Lithotripsy in Percutaneous Treatment of Calcific Left Main Coronary Stenoses

Carlos H. Salazar, Alejandro Travieso, Nieves Gonzalo, Javier Escaned
2019 JACC Case Reports  
Intravascular lithotripsy (IVL) is a potential alternative to atherectomy techniques for this purpose.  ...  Adequate plaque preparation in heavily calcific left main coronary stenoses is mandatory to ensure adequate stent implantation.  ...  ADDRESS FOR CORRESPONDENCE: Dr. Javier Escaned, Interventional Cardiology, Hospital Clínico San Carlos, Calle Profesor Martín Lagos s/n, 28040 Madrid, Spain. E-mail: escaned@secardiologia.es.  ... 
doi:10.1016/j.jaccas.2019.05.008 fatcat:riwhjalxkvesvktph3hsknicxy

Clinical, Angiographic, Functional, and Imaging Outcomes 12 Months After Implantation of Drug-Eluting Bioresorbable Vascular Scaffolds in Acute Coronary Syndromes

Tommaso Gori, Eberhard Schulz, Ulrich Hink, Madeleine Kress, Nadja Weiers, Melissa Weissner, Alexander Jabs, Philip Wenzel, Davide Capodanno, Thomas Münzel
2015 JACC: Cardiovascular Interventions  
Optical coherence tomography (80 BVS, n ¼ 70) showed a mean lumen area of 6.3 AE 2.3 mm 2 . Malapposition was evidenced in 21 (26%) BVS.  ...  CONCLUSIONS Twelve months after BVS implantation, clinical, intracoronary imaging, and vasomotion data appear to provide a rationale for the use of BVS in the setting of ACS and the basis for a randomized  ...  Optical coherence tomography (OCT) showed incomplete expansion of the BVS, which was post-dilated with a good result.  ... 
doi:10.1016/j.jcin.2014.12.244 pmid:25999097 fatcat:p2qghaxhyfgvrexbyvrvguhjka

Automated Coronary Optical Coherence Tomography Feature Extraction with Application to Three-Dimensional Reconstruction

Harry J. Carpenter, Mergen H. Ghayesh, Anthony C. Zander, Jiawen Li, Giuseppe Di Giovanni, Peter J. Psaltis
2022 Tomography  
Coronary optical coherence tomography (OCT) is an intravascular, near-infrared light-based imaging modality capable of reaching axial resolutions of 10–20 µm.  ...  This resolution allows for accurate determination of high-risk plaque features, such as thin cap fibroatheroma; however, visualization of morphological features alone still provides unreliable positive  ...  Schematic showing plaque features visible with optical coherence tomography (OCT) imaging as well as a visualization of A-lines in the cartesian and polar coordinates.  ... 
doi:10.3390/tomography8030108 pmid:35645394 pmcid:PMC9149962 fatcat:z6gya3j7pjh4lecldcjevopjzu

Impact of Drug Release Kinetics on Vascular Response to Different Zotarolimus-Eluting Stents Implanted in Patients With Long Coronary Stenoses

Giulio Guagliumi, Hideyuki Ikejima, Vasile Sirbu, Hiram Bezerra, Giuseppe Musumeci, Nikoloz Lortkipanidze, Luigi Fiocca, Satoko Tahara, Angelina Vassileva, Aleksandre Matiashvili, Orazio Valsecchi, Marco Costa
2011 JACC: Cardiovascular Interventions  
Twenty-one patients treated with ZES-SR were compared with 22 patients treated with ZES-FR from the ODESSA (Optical coherence tomography for DES SAfety) study.  ...  with ZES with faster kinetics (Endeavor ZES-FR, Medtronic Vascular) by optical coherence tomography.  ...  as measured by optical coherence tomography at 6-month follow-up.  ... 
doi:10.1016/j.jcin.2011.04.007 pmid:21777886 fatcat:j7qvn6uqcvdplfy3buao2wrgbu

Recent Trends in Artificial Intelligence-Assisted Coronary Atherosclerotic Plaque Characterization

Anjan Gudigar, Sneha Nayak, Jyothi Samanth, U Raghavendra, Ashwal A J, Prabal Datta Barua, Md Nazmul Hasan, Edward J. Ciaccio, Ru-San Tan, U. Rajendra Acharya
2021 International Journal of Environmental Research and Public Health  
Intravascular ultrasound (IVUS) and intravascular optical coherence tomography (IVOCT) performed during invasive coronary angiography are reference standards for characterizing the atherosclerotic plaque  ...  This has motivated recent research into and development of artificial intelligence (AI)-assisted methods for image processing, feature extraction, plaque identification and characterization.  ...  Acknowledgments: The authors would like to thank the Manipal Academy of Higher Education (MAHE) for providing the required facility to carry out this research.  ... 
doi:10.3390/ijerph181910003 pmid:34639303 fatcat:eo6xdqukbfhwzkhydkfrmxohkq

Zero contrast optical coherence tomography‐guided percutaneous coronary intervention in patients with non‐ST segment elevation myocardial infarction and chronic kidney disease

Zheng‐Yu Liu, Zi‐hui Yin, Cheng‐Yang Liang, Jing He, Chang‐Lu Wang, Xiang Peng, Yu Zhang, Zhao‐Fen Zheng, Hong‐Wei Pan
2021 Catheterization and cardiovascular interventions  
Ultra-low volume contrast PCI was performed after minimal contrast coronary angiography using zero contrast optical coherence tomography (OCT) guidance.  ...  Pre- and post-PCI angiographic measurements were performed using quantitative flow ratio (QFR) for pre-perfusion assessment and verifying improvement.  ...  We would like to give our sincere appreciation to everyone for their support to this study.  ... 
doi:10.1002/ccd.29655 pmid:33764682 fatcat:efatja6mpnfxfhwpe6fhiwf7ly

The combination assessment of lipid pool and thrombus by optical coherence tomography can predict the filter no-reflow in primary PCI for ST elevated myocardial infarction

Yosuke Negishi, Hideki Ishii, Susumu Suzuki, Toshijiro Aoki, Naoki Iwakawa, Hiroki Kojima, Kazuhiro Harada, Kenshi Hirayama, Takayuki Mitsuda, Takuya Sumi, Akihito Tanaka, Yasuhiro Ogawa (+2 others)
2017 Medicine  
Moreover, there is no report on thrombus evaluation by using optical coherence tomography (OCT) for determining whether to use a distal protection device.  ...  ultrasound, OCT = optical coherence tomography, PCI = percutaneous coronary intervention, ROC = receiver-operator characteristic, STEMI = ST-elevated acute myocardial infarction, TCFA = thin-cap fibroatheroma  ...  Lipid pool and thrombus assessment by optical coherence tomography.  ... 
doi:10.1097/md.0000000000009297 pmid:29390391 pmcid:PMC5815803 fatcat:2af4cibdqzemdffxie5h7b6ccy

The role of intracoronary imaging in translational research

Nicholas J. Montarello, Adam J. Nelson, Johan Verjans, Stephen J. Nicholls, Peter J. Psaltis
2020 Cardiovascular Diagnosis and Therapy  
Evolving vessel wall-based, endovascular coronary imaging modalities, including intravascular ultrasound (IVUS), optical coherence tomography (OCT) and near-infrared spectroscopy (NIRS), used in isolation  ...  Here we review the use of different imaging modalities for these purposes and the lessons they have provided thus far.  ...  Giuseppe DiGiovanni from the Atherosclerotic Imaging Core Laboratory, South Australian Health and Medical Research Institute for assistance with image preparation.  ... 
doi:10.21037/cdt-20-1 pmid:33224769 pmcid:PMC7666942 fatcat:a5phjqtbsfeplpvtpiqdiqd4om

Identification of coronary calcifications in optical coherence tomography imaging using deep learning

Yarden Avital, Akiva Madar, Shlomi Arnon, Edward Koifman
2021 Scientific Reports  
The optimal method for delineating calcifications extent is coronary optical coherence tomography (OCT).  ...  Accurate interpretation demands careful review by the operator of a segment of 50–75 mm of the coronary vessel at steps of 5–10 frames per mm accounting for 375–540 images in each OCT run, which is time  ...  Optical coherence tomography (OCT) is an advanced intracoronary imaging technique that allows high-resolution of the coronary structure including vessel lumen size and vessel wall characteristics up to  ... 
doi:10.1038/s41598-021-90525-8 pmid:34050203 pmcid:PMC8163888 fatcat:cwshkdnirvdwtiw7blctoysurm

Culprit-Plaque Morphology and Residual SYNTAX Score Predict Cardiovascular Risk in Acute Myocardial Infarction: An Optical Coherence Tomography Study

Ying Wang, Xiaoxiao Zhao, Peng Zhou, Chen Liu, Zhaoxue Sheng, Jiannan Li, Jinying Zhou, Runzhen Chen, Yi Chen, Li Song, Hanjun Zhao, Hongbing Yan
2021 Journal of atherosclerosis and thrombosis  
Culprit-plaque morphology [plaque rupture (PR) and plaque erosion (PE)] and high-risk plaques (HRP) identified by optical coherence tomography (OCT) and residual SYNTAX score (rSS) have been reported to  ...  Thus, in this study, we aimed to investigate the prognostic implication of culprit-plaque morphology and rSS for major adverse cardiovascular events (MACE) in patients with ST-segment elevation myocardial  ...  We are grateful to the Department of Cardiology, Cardiovascular Institute of Fuwai Hospital for its help in recruiting patients.  ... 
doi:10.5551/jat.63103 pmid:34544957 fatcat:2e5k6547h5g5fksbv3siwnz3de

Angiography Alone Versus Angiography Plus Optical Coherence Tomography to Guide Percutaneous Coronary Intervention

Daniel A. Jones, Krishnaraj S. Rathod, Sudheer Koganti, Stephen Hamshere, Zoe Astroulakis, Pitt Lim, Alexander Sirker, Constantinos O'Mahony, Ajay K. Jain, Charles J. Knight, Miles C. Dalby, Iqbal S. Malik (+10 others)
2018 JACC: Cardiovascular Interventions  
OBJECTIVES This study aimed to determine the effect on long-term survival of using optical coherence tomography (OCT) during percutaneous coronary intervention (PCI).  ...  BACKGROUND Angiographic guidance for PCI has substantial limitations.  ...  Optical coherence tomography (OCT) is an established intravascular imaging method that provides rapid acquisition of high-resolution images capable of assessing lumen dimensions and identifying thrombus  ... 
doi:10.1016/j.jcin.2018.01.274 pmid:30025725 fatcat:a76knz4gc5envlmyhj2jqxkcju
« Previous Showing results 1 — 15 out of 112 results