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Feature guided motion artifact reduction with structure-awareness in 4D CT images

Dongfeng Han, John Bayouth, Qi Song, Sudershan Bhatia, Milan Sonka, Xiaodong Wu
2011 CVPR 2011  
In this paper, we propose a novel method to reduce the magnitude of 4D CT artifacts by stitching two images with a data-driven regularization constrain, which helps preserve the local anatomy structures  ...  The method was tested on both simulated data and clinical 4D CT images.  ...  Acknowledgements This research was supported in part by the NSF grants CCF-0830402 and CCF-0844765, and the NIH grants R01 EB004640 and K25 CA123112.  ... 
doi:10.1109/cvpr.2011.5995561 pmid:22058647 pmcid:PMC3207360 dblp:conf/cvpr/HanBSBSW11 fatcat:per3qfdgqjfunkjjac6644upde

A combined local and global motion estimation and compensation method for cardiac CT

Qiulin Tang, Beshan Chiang, Akinola Akinyemi, Alexander Zamyatin, Bibo Shi, Satoru Nakanishi, Bruce R. Whiting, Christoph Hoeschen
2014 Medical Imaging 2014: Physics of Medical Imaging  
Motion estimation is a very important challenge in CT-based cardiac imaging.  ...  affects the alignment of PET and CT volumes from PET/CT examinations in a non-rigid manner.  ...  2 cm) in tens of minutes yielding images containing millions of spectra. Spectra are then automatically classified as one of seven cell-types in prostate tissue in a matter of seconds.  ... 
doi:10.1117/12.2043492 fatcat:fyzpc5m6jbh7fjohqpdmtzkhte

SU-FF-I-79: Java-Based Plugin for Tomographic Reconstruction for SPECT Data

M Andrade, M Costa, A Marques da Silva
2006 Medical Physics (Lancaster)  
True alignment of planning and on-board image data was achieved according to a 3D point-based registration of the 6 reference BBs in the CT and CBCT images.  ...  Single-axis rotations up to +/-10 o and 3-axis translations up to +/-10 mm were simulated in the planning CT, prior to the generation of reference DTS images.  ...  Conclusion: We have developed a method for reconstructing anatomy on 4D CT images in the presence of motion artifacts.  ... 
doi:10.1118/1.2240759 fatcat:5we2nvgwx5hrxcv2ngufce6obq

TU-B-I-617-01: High Field MRI - Technology, Applications, Safety, and Limitations

RJ Stafford
2005 Medical Physics (Lancaster)  
Analyze tumor and thoracic structures motion using the 4D-CT images.  ...  A method to alleviate respiratory motion problems is to use 4D radiotherapy. We propose novel 4D CT scanning protocol using a helical single-slice CT scanner (SSCT).  ...  Results: The DRRs constructed from multiple phases of a 4D-CT emphasize bony anatomy and other irrelevant structures overlaying the target, making the edges of the target difficult to find.  ... 
doi:10.1118/1.1999700 fatcat:yub56igoe5cl3cthdpzwrdvjp4

SU-EE-A3-06: An Efficient Algorithm for Image-Based Dose Deformation and Accumulation

M Kaus, V Pekar, T McNutt, K Bzdusek
2005 Medical Physics (Lancaster)  
Analyze tumor and thoracic structures motion using the 4D-CT images.  ...  A method to alleviate respiratory motion problems is to use 4D radiotherapy. We propose novel 4D CT scanning protocol using a helical single-slice CT scanner (SSCT).  ...  Results: The DRRs constructed from multiple phases of a 4D-CT emphasize bony anatomy and other irrelevant structures overlaying the target, making the edges of the target difficult to find.  ... 
doi:10.1118/1.1997464 fatcat:zue2hfmc5ze6ziwu332w3u2lue

TU-EE-A3-05: Scatter Radiation in Digital Tomosynthesis

B Liu, S Glick, X Gong
2005 Medical Physics (Lancaster)  
Analyze tumor and thoracic structures motion using the 4D-CT images.  ...  A method to alleviate respiratory motion problems is to use 4D radiotherapy. We propose novel 4D CT scanning protocol using a helical single-slice CT scanner (SSCT).  ...  Results: The DRRs constructed from multiple phases of a 4D-CT emphasize bony anatomy and other irrelevant structures overlaying the target, making the edges of the target difficult to find.  ... 
doi:10.1118/1.1998434 fatcat:jnqebvqstnhixdmecqmh35gfbi

Geodesic Density Regression for Correcting 4DCT Pulmonary Respiratory Motion Artifacts [article]

Wei Shao, Yue Pan, Oguz C. Durumeric, Joseph M. Reinhardt, John E. Bayouth, Mirabela Rusu, Gary E. Christensen
2021 arXiv   pre-print
This paper presents a geodesic density regression (GDR) algorithm to correct motion artifacts in 4DCT by correcting artifacts in one breathing phase with artifact-free data from corresponding regions of  ...  The GDR algorithm was evaluated and compared to a state-of-the-art geodesic intensity regression (GIR) algorithm using simulated CT time-series and 4DCT scans with clinically observed motion artifacts.  ...  Approaches designed for reduction of motion artifacts in cine 4DCT include generating interpolated CT scans exactly at the predefined tidal volumes based on an optimal flow method [4] , optimizing phase  ... 
arXiv:2106.06853v1 fatcat:7wvwr3wkcneahedzb6qpvcgeza

Thursday 4 September 2014

2014 Journal of Medical Radiation Sciences  
Although there are increasing evidence for the latter has radiogenomic based strategies not yet been implemented in clinical practice.  ...  Thus, the newer technological developments in radiotherapy by IMRT and particle beam irradiation are strongly based on an argumentation of securing reduced morbidity.  ...  Results: RT 4D CBCT gave an average imaging dose reduction of 53% based on needing fewer projections (average 617, Fig. 1a ) compared to conventional 4D CBCT (1320 projections, Fig. 1b ) and image quality  ... 
doi:10.1002/jmrs.70 pmid:27759940 pmcid:PMC4263482 fatcat:o23ixn3zgvcenowujmhcq2sx6m

2D/3D registration algorithm for lung brachytherapy

P. S. Zvonarev, T. J. Farrell, R. Hunter, M. Wierzbicki, J. E. Hayward, R. K. Sur
2013 Medical Physics (Lancaster)  
The algorithm utilizes a rigid registration model based on a pixel/voxel intensity matching approach.  ...  External objects such as the treatment table and ECG leads are often in CT images, affecting the above mentioned 2D/3D registration.  ...  These artifacts were removed using a MM opening filter with a 77 disk structuring element resulting in image I d .  ... 
doi:10.1118/1.4788663 pmid:23387761 fatcat:6xmvqy26vvdzrf3otdm6vhtvyu

Patient-specific CFD simulation of intraventricular haemodynamics based on 3D ultrasound imaging

A. M. Bavo, A. M. Pouch, J. Degroote, J. Vierendeels, J. H. Gorman, R. C. Gorman, P. Segers
2016 BioMedical Engineering OnLine  
As the human heart is a highly motile structure, its motion has to be included in any numerical simulation which studies the intraventricular flows.  ...  Their motion, known as a function of time from the segmented ultrasound images, was imposed as a boundary condition in an Arbitrary Lagrangian-Eulerian framework.  ...  Funding The funding sources have no role in the study design, the data collection and analysis, decision to publish or preparation of the manuscript.  ... 
doi:10.1186/s12938-016-0231-9 pmid:27612951 pmcid:PMC5016944 fatcat:gabjfenvhzd4zioqo5lj4aknma

4D interventional device reconstruction from biplane fluoroscopy

Martin Wagner, Sebastian Schafer, Charles Strother, Charles Mistretta
2016 Medical Physics (Lancaster)  
The images are then preprocessed by a noise reduction algorithm using directional adaptive filter kernels and a ridgeness filter that emphasizes curvilinear structures.  ...  Results: The accuracy of the reconstruction was measured in a vascular head phantom as well as in a cadaver head and a canine study.  ...  ACKNOWLEDGMENTS Research reported in this publication was supported by the National Heart, Lung, And Blood Institute of the National Institutes of Health under Award No. R01HL116567.  ... 
doi:10.1118/1.4941950 pmid:26936717 pmcid:PMC4760973 fatcat:yyt6zsr3hrcbvpu363thzxzneq

An asymmetric sheath controls flagellar supercoiling and motility in the Leptospira spirochete [article]

Kimberley H. Gibson, Felipe Trajtenberg, Elsio A. Wunder, Megan R. Brady, Fabiana San Martin, Ariel E. Mechaly, Zhiguo Shang, Jun Liu, Mathieu Picardeau, Albert I. Ko, Alejandro Buschiazzo, Charles V. Sindelar
2019 biorxiv/medrxiv   pre-print
To investigate the structural basis of flagellar supercoiling, which is critical for motility, we determined the structure of native flagellar filaments from the spirochete Leptospira by integrating high-resolution  ...  We show that these filaments are coated by a highly asymmetric, multi-component sheath layer, contrasting with flagellin-only homopolymers previously observed in exoflagellated bacteria.  ...  We thank the IT Department from Institut Pasteur for protein modeling computations on the TARS cluster and the staff in the Yale High-Performance Computing facility for their maintenance of these facilities  ... 
doi:10.1101/847533 fatcat:loszukvnonfpfm3p7kp4obpnry

Computer-Aided Diagnosis Systems for Lung Cancer: Challenges and Methodologies

Ayman El-Baz, Garth M. Beache, Georgy Gimel'farb, Kenji Suzuki, Kazunori Okada, Ahmed Elnakib, Ahmed Soliman, Behnoush Abdollahi
2013 International Journal of Biomedical Imaging  
In addition, the paper addresses several challenges that researchers face in each implementation step and outlines the strengths and drawbacks of the existing approaches for lung cancer CAD systems.  ...  For this reason, CAD systems for lung cancer have been investigated in a huge number of research studies.  ...  and malignant lung nodules in thoracic CT [117] , and FP reduction in a CADe system for polyp detection in CT colonography [112, [118] [119] [120] [121] .  ... 
doi:10.1155/2013/942353 pmid:23431282 pmcid:PMC3570946 fatcat:4kcqhbezknh6tps6wv2zgl77xy

Metal Artifact Reduction in Computed Tomographic (CT) Images for Radiotherapy Treatment Planning

Moti R Paudel
2014
High density/high atomic number metallic objects create shading and streaking metal artifacts in the CT image that can cause inaccurate delineation of anatomical structures or inaccurate radiation dose  ...  We developed techniques for reducing metal artifacts in both megavoltage CT (MVCT) and kilovoltage CT (kVCT) images.  ...  However, the pre-treatment 4D images obtained using 4D kVCBCT are poor in quality and can't be used for real-time motion tracking because they are retrospectively gated.  ... 
doi:10.7939/r30z71379 fatcat:3ahwpwiswvdarfhlme4yvgocka

Modern Diagnostic Imaging Technique Applications and Risk Factors in the Medical Field: A Review

Shah Hussain, Iqra Mubeen, Niamat Ullah, Syed Shahab Ud Din Shah, Bakhtawar Abduljalil Khan, Muhammad Zahoor, Riaz Ullah, Farhat Ali Khan, Mujeeb A. Sultan, Chen Li
2022 BioMed Research International  
In the future, with mounting innovations and advancements in technology systems, the medical diagnostic field will become a field of regular measurement of various complex diseases and will provide healthcare  ...  There are many medical imaging techniques used for this purpose such as X-ray, computed tomography (CT), positron emission tomography (PET), magnetic resonance imaging (MRI), single-photon emission computed  ...  choice for radiation oncology, which is prone to motion artifacts.  ... 
doi:10.1155/2022/5164970 pmid:35707373 pmcid:PMC9192206 fatcat:zkmv55ll3rdkvk2wvej44ickiy
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