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Assessment of dedicated low-dose cardiac micro-CT reconstruction algorithms using the left ventricular volume of small rodents as a performance measure

Joscha Maier, Stefan Sawall, Marc Kachelrieß
2014 Medical Physics (Lancaster)  
Evaluation of CNR As we focus on left ventricular volume estimation the contrast between the left ventricle and the myocardium was evaluated.  ...  Representative for such approaches, we used a seeded region growing algorithm. 43 It requires a manual definition of two initial seed regions that correspond to the left ventricle and the myocardium.  ... 
doi:10.1118/1.4870983 pmid:24784387 fatcat:zoeoi6woxjel5i6tjy4iwaitu4

Prediction Based Collaborative Trackers (PCT): A Robust and Accurate Approach Toward 3D Medical Object Tracking

Lin Yang, Bogdan Georgescu, Yefeng Zheng, Yang Wang, Peter Meer, Dorin Comaniciu
2011 IEEE Transactions on Medical Imaging  
of the left ventricle (67 sequences, 1134 3D volumetric echocardiography data), dense tracking in the myocardial regions between the epicardium and endocardium of the left ventricle (503 sequences, roughly  ...  9000 3D volumetric echocardiography data), and whole heart four chambers tracking (20 sequences, 200 cardiac 3D volumetric CT data).  ...  Dense Myocardial Region Tracking of The Left Ventricle In this section, we demonstrate the performance of the proposed tracking algorithm for dense tracking in myocardial region.  ... 
doi:10.1109/tmi.2011.2158440 pmid:21642040 fatcat:zzo2vl7lrncyjebkfvu5vjhocy

Learning-Based Detection and Tracking in Medical Imaging: A Probabilistic Approach [chapter]

Yang Wang, Bogdan Georgescu, Terrence Chen, Wen Wu, Peng Wang, Xiaoguang Lu, Razvan Ionasec, Yefeng Zheng, Dorin Comaniciu
2012 Lecture Notes in Computational Vision and Biomechanics  
Accurate, robust and fast tracking of deformable anatomical objects, such as the heart, is a crucial task in medical image analysis.  ...  the temporal trajectory of the deformable target.  ...  Muhammad Ashraf at OHSU for providing the volumetric ultrasound sequences and sonomicrometry data in the in vitro animal study, Dr. Alan Katz from St. Francis Hospital and Dr.  ... 
doi:10.1007/978-94-007-5446-1_9 fatcat:faije7sn2bh4nlstwbtsrziiy4

Left ventricular heart phantom for wall motion analysis

2013 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)  
In interventional cardiology, three-dimensional anatomical and functional information of the cardiac chambers, e.g. the left ventricle, would have an important impact on diagnosis and therapy.  ...  With the technology of C-arm CT it is possible to reconstruct intraprocedural 3-D images from angiographic projection data.  ...  ACKNOWLEDGMENT The authors gratefully acknowledge funding support from the NIH grant R01 HL087917 and of the Erlangen Graduate School in Advanced Optical Technologies (SAOT) by the German Research Foundation  ... 
doi:10.1109/nssmic.2013.6829255 fatcat:s7xgu6uembb6tjxevu2zcfsona

Estimation of patient-specific material properties of the mitral valve using 4D Transesophageal Echocardiography

Jingjing Kanik, Tommaso Mansi, Ingmar Voigt, Puneet Sharma, Razvan Ioan Ionasec, Dorin Comaniciu, James Duncan
2013 2013 IEEE 10th International Symposium on Biomedical Imaging  
The algorithm was verified on synthetic data with known Young's modulus and shear modulus, yielding less than 5% error. The algorithm was also evaluated on 4D TEE images of five patients.  ...  4D Transesophageal Echocardiography (TEE) is a newly developed tool to visualize the morphology and dynamics of the mitral valve for diagnosis and treatment planning.  ...  [9] in 2D left ventricle motion analysis, is employed for the estimation.  ... 
doi:10.1109/isbi.2013.6556690 dblp:conf/isbi/KanikMVSICD13 fatcat:3lxfjys3c5gzhi66tbui53jasi

Patient-Specific Model of Left Heart Anatomy, Dynamics and Hemodynamics from 4D TEE: A First Validation Study [chapter]

Ingmar Voigt, Tommaso Mansi, Viorel Mihalef, Razvan Ioan Ionasec, Anna Calleja, Etienne Assoumou Mengue, Puneet Sharma, Helene Houle, Bogdan Georgescu, Joachim Hornegger, Dorin Comaniciu
2011 Lecture Notes in Computer Science  
We propose a novel framework for personalized modeling of the left-side heart that integrates comprehensive data of the morphology, function and hemodynamics.  ...  Personalized boundary conditions are determined by estimating cardiac shape and motion from 4D TEE images through robust discriminative learning methods.  ...  The patient-specific parameters of the valvular apparatus and left ventricle are estimated from 4D TEE images using a hierarchical discriminative learning algorithm as proposed in [6, 7] .  ... 
doi:10.1007/978-3-642-21028-0_44 fatcat:jd43avxlpbbghav3ow3v6spwbu

Assessment of RV function using gated blood pool SPECT

Serge D. Van Kriekinge, Daniel S. Berman, Guido Germano
2015 Journal of Nuclear Cardiology  
In this issue of the Journal of Nuclear Cardiology Ò , Dercle et al report on the use of three algorithms for the assessment of RV function using gated blood pool SPECT (GBPS) and compare the results of  ...  The independent prognostic value of RV function is most strongly established for HF and PH, 1 but the role of the RV in CVD has thus far remained relatively neglected. 2 Cardiac magnetic resonance (CMR  ...  In this issue of the Journal of Nuclear Cardiology Ò , Dercle et al report on the use of three algorithms for the assessment of RV function using gated blood pool SPECT (GBPS) and compare the results of  ... 
doi:10.1007/s12350-015-0091-x pmid:25795395 fatcat:mmgmncly3vbrbeyrk46load5re

A LabVIEW Platform for Preclinical Imaging Using Digital Subtraction Angiography and Micro-CT

Cristian T. Badea, Laurence W. Hedlund, G. Allan Johnson
2013 Journal of Medical Engineering  
We also show how DSA can be used for functional imaging of the kidney. Finally, the power of 4D micro-CT imaging using both prospective and retrospective gating is shown for cardiac imaging.  ...  Various applications allow cardiac- and respiratory-gated acquisitions for both DSA and micro-CT studies.  ...  Acknowledgments All work was performed at the Duke Center for In Vivo Microscopy and an NIH/NCRR/NIBIB National Biomedical Technology Resource Center (P41 EB015897).  ... 
doi:10.1155/2013/581617 pmid:27006920 pmcid:PMC4782637 fatcat:klibohzpdbafde5zgu2y4rgjki

Morphologica l and Functional Modeling of the Heart Valves and Chambers [chapter]

Razvan Ioan Ionasec, Dime Vitanovski, Dorin Comaniciu
2011 Patient-Specific Modeling in Tomorrow's Medicine  
These include object localization, rigid and non-rigid motion estimation, and surface boundary estimation from dense 4D data (TEE, CT) as well as regression-based techniques for surface reconstruction  ...  from sparse 4D data (MRI).  ...  Section 3 describes robust algorithms for object localization and rigid motion estimation, non-rigid motion estimation, and surface boundary estimation from dense 4D data (Computed Tomography and Echocardiography  ... 
doi:10.1007/8415_2011_94 fatcat:ixrpdisqovgfdhchscvfwehp3e

Cardiac motion estimation in multislice computed tomography imaging using a 4D multiscale surface-volume matching process

A. Simon, M. Garreau, D. Boulmier, C. Toumoulin, H. Le Breton
2005 Computers in Cardiology, 2005  
The estimated motion can be used for global and local functional parameters quantification. Results obtained on simulated and real data show the good behavior of this method.  ...  Needing the segmentation of only one volume, it provides, on a whole dynamic sequence, 3D velocity fields associated to the left ventricle inner surface and an estimation of the localization of this surface  ...  Acknowledgements This work is supported by Brittany region and the French Medical Research and Health National Institute (INSERM).  ... 
doi:10.1109/cic.2005.1588076 fatcat:bge3nnxcnrfz5h2qnxo5isjupa

Estimation of Cardiac Respiratory-Motion by Semi-Automatic Segmentation and Registration of Non-Contrast-Enhanced 4D-CT Cardiac Datasets

Joyoni Dey, Tinsu Pan, David J. Choi, Dennis Robotis, Mark S. Smyczynski, P. Hendrik Pretorius, Michael A. King
2009 IEEE Transactions on Nuclear Science  
We devised a 3-D semi-automated segmentation algorithm that segments the heart in the 4D-CT datasets acquired without contrast enhancement for use in estimating respiratory motion of the heart.  ...  The respiratory-gated CT images covered the cardiac region and were acquired at each of 10 stages of the respiratory cycle, with the first stage being end-inspiration.  ...  The 4D-CT datasets from each of these patients consist of 3-D data covering the heart region for 10 stages during the respiratory cycle.  ... 
doi:10.1109/tns.2009.2031642 pmid:20419041 pmcid:PMC2858412 fatcat:3owtt7l42vb4pjd3nw4dfj3nem

Assessment of Left Ventricular Function in Cardiac MSCT Imaging by a 4D Hierarchical Surface-Volume Matching Process

Mireille Garreau, Antoine Simon, Dominique Boulmier, Jean-Louis Coatrieux, Hervé Le Breton
2006 International Journal of Biomedical Imaging  
Based on a 4D hierarchical surface-volume matching process, it provides the detection of the heart left cavities along the acquired sequence and the estimation of their 3D surface velocity fields.  ...  A new method is proposed for cardiac motion extraction in multislice CT.  ...  The authors express their thanks to Siemens Medical Division, France, for having provided us real MSCT image data.  ... 
doi:10.1155/ijbi/2006/37607 pmid:23165027 pmcid:PMC2324033 fatcat:tuzdp3alerb4jj2avzcnrdnm3i

Four-Dimensional Image Reconstruction Strategies in Cardiac-Gated and Respiratory-Gated PET Imaging

Arman Rahmim, Jing Tang, Habib Zaidi
2013 PET Clinics  
The development of advanced 4D physical anthropomorphic phantoms and computational models will benefit research in cardiac-gated and respiratory-gated PET imaging.  ...  A wide-ranging choice of techniques are available in research settings but have not yet been used in the clinic.  ...  To further improve the quality of cardiac PET images (noise, resolution) so as to enhance identifiability of radiotracer uptake defects in the left ventricle (LV) by clinicians, because regions of decreased  ... 
doi:10.1016/j.cpet.2012.10.005 pmid:27157815 fatcat:wfqcow3fnnfv7pt2jg4i66fotq

Patient-Specific Inverse Modeling of In Vivo Cardiovascular Mechanics with Medical Image-Derived Kinematics as Input Data: Concepts, Methods, and Applications

Johane H. Bracamonte, Sarah K. Saunders, John S. Wilson, Uyen T. Truong, Joao S. Soares
2022 Applied Sciences  
Inverse modeling approaches in cardiovascular medicine are a collection of methodologies that can provide non-invasive patient-specific estimations of tissue properties, mechanical loads, and other mechanics-based  ...  These methods have become available for medical applications mainly due to the continuing development of image-based kinematic techniques, the maturity of the associated theories describing cardiovascular  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app12083954 fatcat:so7cwudvyfgprigztufgw7we2e

In vivosmall-animal imaging using micro-CT and digital subtraction angiography

C T Badea, M Drangova, D W Holdsworth, G A Johnson
2008 Physics in Medicine and Biology  
We show that both methods can be used not only to provide morphological, but also functional information, such as cardiac function estimation or perfusion.  ...  The limitations are usually associated with the relatively poor contrast mechanisms and potential radiation damage due to ionizing radiation, although the use of contrast agents and careful design of studies  ...  Using both approaches, quantitative estimates can be made for ejection fraction, stroke volume, and cardiac output on the basis of left ventricle (LV) volume measurements in the 4D (3D + time) micro-CT  ... 
doi:10.1088/0031-9155/53/19/r01 pmid:18758005 pmcid:PMC2663796 fatcat:ajx5tff2ordbfdtc3d5cuky6vi
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