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Biomedical Image Denoising Based on Hybrid Optimization Algorithm and Sequential Filters

N Yousefi Moteghaed
2020 Journal of Biomedical Physics and Engineering  
The PSNR values were obtained between 59 to 63 and 63 to 65 for MRI and CT images. Also, the RMSE values were obtained between 36 to 47 and 12 to 20 for MRI and CT images.  ...  In this analytical study, we have applied the composite of different types of noise such as salt and pepper noise, speckle noise and Gaussian noise to images to make them noisy.  ...  [19] [20] [21] proposed a noise reduction technique using thresholding and window based multi-wavelet transformation for CT images.  ... 
doi:10.31661/jbpe.v0i0.1016 pmid:32158715 pmcid:PMC7036412 fatcat:adpituhzmzgjnidoihrgqpsdpy

Meeting summaries

1985 IEEE ASSP Magazine  
(IO) Image Sequence Coding (B; G. Haskell) Most of the papers in the Image Sequence Coding session dealt with some aspect of motion compensated interframe prediction algorithms for full motion video.  ...  The technjques ranged from optimization of cells in an array to. optimization of filter coefficients for complexity reduction within the constraints of an application's specifications.  ... 
doi:10.1109/massp.1985.1163750 fatcat:jt4du7u4offyjonfsu2f2dlywu

An Adaptive SAR Despeckling Method Using Cuckoo Search Algorithm

Memoona Malik, Iftikhar Azim, Amir Hanif Dar, Sohail Asghar
2021 Intelligent Automation and Soft Computing  
The contemporary despeckling techniques adversely affect image edges during the noise reduction process and are thus responsible for losing the significant image features.  ...  The CSO generates optimal sequences of these filters according to the nature of input images with peak signalto-noise ratio (PSNR) and structural similarity index (SSIM) as its objective function.  ...  Funding Statement: The authors received no specific funding for this study. Conflicts of Interest: The authors declare that they have no conflicts of interests.  ... 
doi:10.32604/iasc.2021.017437 fatcat:hw2dtknqd5gynpkmiljgbqjtae

Impact of view reduction in CT on radiation dose for patients

E. Parcero, L. Flores, M.G. Sánchez, V. Vidal, G. Verdú
2017 Radiation Physics and Chemistry  
Iterative methods have become a hot topic of research in computed tomography (CT) imaging because of their capacity to resolve the reconstruction problem from a limited number of projections.  ...  This allows the reduction of radiation exposure on patients during the data acquisition. The reconstruction time and the high radiation dose imposed on patients are the two major drawbacks in CT.  ...  Introduction In Computer Tomography (CT) imaging, a set of projections taken with a scanner is used to reconstruct the internal structure of an object.  ... 
doi:10.1016/j.radphyschem.2016.01.038 fatcat:abptcjlzs5bhjeez6qxpbgbahi

C-arm CT Perfusion Imaging in the Interventional Suite

Andreas Fieselmann, Michael Manhart
2013 Current Medical Imaging Reviews  
Diagnostic perfusion imaging using CT or MRI has been available for several years. One of its applications is acute stroke diagnosis.  ...  Interventional perfusion imaging using C-arm CT is a novel field of research. It could provide perfusion information during catheter-guided stroke treatment in order to optimize patient management.  ...  Acknowledgments and Disclaimer The authors gratefully acknowledge funding of the Erlangen Graduate School in Advanced Optical Technologies (SAOT) by the German Research Foundation (DFG) in the framework  ... 
doi:10.2174/1573405611309020004 fatcat:vwegjjweenbexfrpvyaequqama

CT pulmonary angiogram with 60% dose reduction: Influence of iterative reconstructions on image quality

F. Pontana, D. Moureau, B. Schmidt, A. Duhamel, J.-B. Faivre, K. Yasunaga, J. Remy, M. Remy-Jardin
2015 Diagnostic and Interventional Imaging  
Results: Group 2 images presented: (a) a significant objective reduction in noise measured in the trachea on mediastinal (16.04 ± 5.66 vs 17.66 ± 5.84) (P = 0.0284) and pulmonary (29.77 ± 6.79 vs 37.96  ...  ± 9.03) (P < 0.0001) images; (b) a similar subjective perception of noise and overall image quality (P = 1), which was considered to be excellent in 66% (33/50) of the cases, with no influence on the  ...  Disclosure of interest The authors declare that they have no conflicts of interest concerning this article.  ... 
doi:10.1016/j.diii.2014.08.006 pmid:25686775 fatcat:bh5mmevr25cnlbmm7ykcj3grym

Radiation Dose Reduction in Pediatric Body CT Using Iterative Reconstruction and a Novel Image-Based Denoising Method

Lifeng Yu, Joel G. Fletcher, Maria Shiung, Kristen B. Thomas, Jane M. Matsumoto, Shannon N. Zingula, Cynthia H. McCollough
2015 American Journal of Roentgenology  
OBJECTIVE-The objective of this study was to evaluate the radiation dose reduction potential of a novel image-based denoising technique in pediatric abdominopelvic and chest CT examinations and compare  ...  CONCLUSION-Although a novel image-based denoising technique performed better than a commercial iterative reconstruction method in pediatric abdominopelvic CT examinations, it performed worse in pediatric  ...  Acknowledgments We thank Armando Manduca, Dan Blezek, and Zhoubo Li for their contribution to the development and implementation of the adaptive nonlocal means technique.  ... 
doi:10.2214/ajr.14.14185 pmid:26496550 pmcid:PMC4849891 fatcat:agoqoi4wfvhwhlbiuruk6er66y

Neural Network Blind Equalization Algorithm Applied in Medical CT Image Restoration

Yunshan Sun, Liyi Zhang, Jin Zhang, Lijuan Shi
2013 Mathematical Problems in Engineering  
A new algorithm for iterative blind image restoration is presented in this paper. The method extends blind equalization found in the signal case to the image.  ...  In order to obtain the estimation of the original image, what is proposed in this method is to optimize constant modulus blind equalization cost function applied to grayscale CT image by using conjugate  ...  Acknowledgments The authors thank the editor and the anonymous reviewers for their helpful comments and valuable suggestions during  ... 
doi:10.1155/2013/743546 fatcat:y3gfdeenpnaavf6wgddxdeavky

Thoracic wall reconstruction using ultrasound images to model/bend the thoracic prosthesis for correction of pectus excavatum

João Gomes Fonseca, Antonio H. J. Moreira, Pedro L. Rodrigues, Jaime C. Fonseca, A. C. M. Pinho, Jorge Correia-Pinto, Nuno F. Rodrigues, João L. Vilaça, Johan G. Bosch, Marvin M. Doyley
2012 Medical Imaging 2012: Ultrasonic Imaging, Tomography, and Therapy  
The aim of this work is the CT-scan substitution by ultrasound imaging for the pre-operative diagnosis and pre-modeling of the prosthesis, in order to avoid patient radiation exposure.  ...  These images are overlapped to reconstruct an axial plane equivalent to a CT-slice.  ...  ACKNOWLEDGEMENTS The authors acknowledge to Foundation for Science and Technology (FCT) -Portugal for the fellowships with the references: SFRH/BPD/66151/2009; and, SFRH/BPD/46851/2008.  ... 
doi:10.1117/12.911626 fatcat:cu43q5uehvberib3rhgj22lfuy

The Use of Artificial Intelligence in Computed Tomography Image Reconstruction: A Systematic Review

Theresa Lee, Medical Radiation Imaging and Radiation Sciences, Monash University, Melbourne, Australia, Euclid Seeram, Medical Radiation Imaging and Radiation Sciences, Monash University, Melbourne, Australia
2020 Radiology - Open Journal  
Hence, with the increasing need for radiation dose reductions in CT, the use of artificial intelligence (AI) in image reconstruction has been an area of growing interest.  ...  reductions in CT imaging.  ...  However, with the increasing need for radiation dose reductions in CT imaging, the use of AI in CT image reconstruction is now a growing area of interest among researchers.  ... 
doi:10.17140/roj-4-129 fatcat:57gyl7nogvcgbazxm7uo7w2b6a

CT Dose Reduction and Dose Management Tools: Overview of Available Options

Cynthia H. McCollough, Michael R. Bruesewitz, James M. Kofler
2006 Radiographics  
Acknowledgments: The authors thank Natalie Braun, Shirley Stuve, and Kristina Nunez for their help with manuscript preparation.  ...  The noise target (standard deviation of CT numbers) is varied on the basis of patient size by using an empirical algorithm; thus, image noise is not kept constant for all patients but is adjusted according  ...  A simplified approach to achieving the optimal image quality is to require a specific noise level for a specific diagnostic task.  ... 
doi:10.1148/rg.262055138 pmid:16549613 fatcat:cidlixvqxzczdidompfwg5hfha

Radiation dose reduction with application of non-linear adaptive filters for abdominal CT

Sarabjeet Singh
2012 World Journal of Radiology  
Radiation dose reduction with application of non-linear adaptive filters for abdominal CT. World  ...  reviewe� �n��ro�esse� an� ��ro�esse� i��ages for i��age q�a�ity in a b�in�e� ran�o��ize� ��anner�� CT �ose in�ex vo����e, �ose �ength ��ro���t, ��atient weight, transverse �ia��eters, obje�tive noise  ...  Radiation doses DISCUSSION Since lowering of radiation dose increases the image noise, an approach to reduce radiation dose associated with CT is to post process low dose noisy images in order to lower  ... 
doi:10.4329/wjr.v4.i1.21 pmid:22328968 pmcid:PMC3272617 fatcat:dzfkxo252jfpvhc6vhtxxwaaju

Real-time adaptive filtering for projection reconstruction MR fluoroscopy

T. Schaeffter, M. Grass, R. Proksa, V. Rasche
2003 IEEE Transactions on Medical Imaging  
In contrast to an imaged-based approach, this method allows a very efficient computational implementation.  ...  However, the application of fast pulse sequences still suffers from low signal-to-noise ratios (SNRs), which can be the limiting factor for the actual acquisition speed.  ...  Eggers for helpful discussions and technical support.  ... 
doi:10.1109/tmi.2002.806584 pmid:12703761 fatcat:edu374deh5glhkxo75lvtugyya

New Liver Imaging Techniques

Mukta D. Agrawal, Sheela Agarwal, Jorge M. Fuentes-Oreego, Koichi Hayano, Dushyant V. Sahani
2013 Current Radiology Reports  
In this article, we discuss the recent advances in CT and MRI technology and their applications for improving hepatic imaging.  ...  In addition to several newer MRI pulse sequences, the introduction of a new hepatocyte-specific contrast agent, gadoxetate disodium, offers additional benefits for improved detection and characterization  ...  Iterative Reconstruction Technique (IR) Image noise reducing algorithms include conventional noise reduction filters, as well as novel approaches based on IR.  ... 
doi:10.1007/s40134-013-0028-6 fatcat:3tpix6atkfastd26nbhdy6fjxy

Adaptive anatomical preservation optimal denoising for radiation therapy daily MRI

Rapeepan Maitree, Gloria J. Guzman Perez-Carrillo, Joshua S. Shimony, H. Michael Gach, Anupama Chundury, Michael Roach, H. Harold Li, Deshan Yang
2017 Journal of Medical Imaging  
An innovative method, adaptive anatomical preservation optimal denoising (AAPOD), was developed for optimal image denoising, i.e., to maximally reduce noise while preserving the tissue boundaries.  ...  AAPOD is useful for improving the quality of MRIs with low-contrast-to-noise ratios and could be applied to other medical imaging modalities, e.g., computed tomography. in Saint Louis.  ...  Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the Agency for Healthcare Research and Quality.  ... 
doi:10.1117/1.jmi.4.3.034004 pmid:28894763 pmcid:PMC5580371 fatcat:x4cqnhorhzekhe7eexpt6zzyyq
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