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Automatic Detection of CT Perfusion Datasets Unsuitable for Analysis due to Head Movement of Acute Ischemic Stroke Patients

Fahmi Fahmi, Henk Marquering, Geert Streekstra, Ludo Beenen, Natasja Janssen, Charles Majoie, Ed vanBavel
2014 Journal of Healthcare Engineering  
We developed a method for automatic detection of CTP datasets with excessive head movement, based on 3D image-registration of CTP, with non-contrast CT providing transformation parameters.  ...  Head movement during brain Computed Tomography Perfusion (CTP) can deteriorate perfusion analysis quality in acute ischemic stroke patients.  ...  ACKNOWLEDGEMENTS This work was supported by LP3M University of Sumatera Utara and RS Pendidikan USU through Directorate General of Higher Education (DIKTI) Scholarship, Ministry of National Education Indonesia  ... 
doi:10.1260/2040-2295.5.1.67 pmid:24691387 fatcat:pkrm67t55jgwncjasn72rje5te

Interpretation of SPECT/CT Myocardial Perfusion Images: Common Artifacts and Quality Control Techniques

Ryan A. Dvorak, Richard K. J. Brown, James R. Corbett
2011 Radiographics  
The CT-based attenuation maps obtained with hybrid SPECT/CT systems also have been useful for improving diagnostic accuracy.  ...  With the use of hybrid SPECT/computed tomography (CT) scanning systems, the cardiac functional parameters can be measured in a single imaging session.  ...  -The authors thank Carol Kruise for her help in preparing the manuscript and modifying the images, and Jeff Meden for his assistance with image selection.  ... 
doi:10.1148/rg.317115090 pmid:22084188 fatcat:zib272ivy5eu3ehj24aaenqqkq

Multimodal phantoms for clinical PET/MRI

Eve Lennie, Charalampos Tsoumpas, Steven Sourbron
2021 EJNMMI Physics  
Subsequently, commercially available PET and nuclear medicine phantoms are often utilised, with CT-based attenuation maps substituted for MR-based attenuation maps due to the lack of MR visibility in phantom  ...  This review explores the designs and applications of phantom work within the field of simultaneous acquisition PET/MRI as published over the period of a decade.  ...  Authors' contributions EL performed the investigation and composed the review article. SS and CT advised the study and commented and edited the article.  ... 
doi:10.1186/s40658-021-00408-0 pmid:34436671 pmcid:PMC8390737 fatcat:ntu3ygwc5nhtdicx7rtz3cbzvq

Best practice for the nuclear medicine technologist in CT-based attenuation correction and calcium score for nuclear cardiology

Luca Camoni, on behalf of the Technologist Committee of the European Association of Nuclear Medicine (EANM), Andrea Santos, Marieclaire Attard, Marius Ovidiu Mada, Agata Karolina Pietrzak, Sonja Rac, Sebastijan Rep, Christelle Terwinghe, Pedro Fragoso Costa
2020 European Journal of Hybrid Imaging  
As an integral part of the hybrid imaging system, computed tomography (CT) plays a crucial role in myocardial perfusion imaging diagnostics.  ...  The use of hybrid systems is increasingly growing in Europe and this is progressively important for the final result of diagnostic tests.  ...  The not declared parameters are identified by the acronym ( Table feed : feed measured in mm/s, represents the movement (mm) of the CT table in one second of time Pitch: modern hybrid systems employ  ... 
doi:10.1186/s41824-020-00080-0 pmid:34191150 fatcat:rgz2n6wynveqvciccy47jkqkju

Co-registration of CTA coronary artery/vein maps and MR myocardial viability/scar maps for optimized revascularization or resynchronization therapy planning

Thomas P O'Donnell, Engin Dikici, Teresa Swenson, Jean Shaffer, Richard D White
2009 Journal of Cardiovascular Magnetic Resonance  
(DT) as defined by the percentage of transmurality in each scar.  ...  Hypothesis: ceCMR can identify the subgroup developing VA in patients with prophylactic ICD implantation following MADIT criteria.  ...  Conclusion: We presented a robust, accurate and efficient method for the fully automatic delineation of the myocardium contours in LA + SA cine CMR images, which can be used for accurate LV functional  ... 
doi:10.1186/1532-429x-11-s1-p193 fatcat:pg7jna2nwbaijmyy3sf5pbc3um

Instrumentation quality assurance and performance

2007 Journal of Nuclear Cardiology  
As with SPECT/CT, investigators have recently begun documenting the effects of the misregistration between PET and CT transaxial sections on the quantification of myocardial perfusion defects. 28, 29  ...  Talking, head movement, and irregular breathing should be avoided during the acquisition.  ... 
doi:10.1016/j.nuclcard.2007.09.024 fatcat:hhlhowkxczawlmls2dynb7g43i

Advances in Computational Human Phantoms and Their Applications in Biomedical Engineering—A Topical Review

Wolfgang Kainz, Esra Neufeld, Wesley E. Bolch, Christian G. Graff, Chan Hyeong Kim, Niels Kuster, Bryn Lloyd, Tina Morrison, Paul Segars, Yeon Soo Yeom, Maria Zankl, X. George Xu (+1 others)
2019 IEEE Transactions on Radiation and Plasma Medical Sciences  
Over the past decades, significant improvements have been made in the field of computational human phantoms (CHPs) and their applications in biomedical engineering.  ...  Because many of these CHPs are increasingly providing data for regulatory submissions of various medical devices, the validity, anatomical accuracy, and availability to cover the entire patient population  ...  The technique is based on an image registration allowing template XCAT anatomy to be mapped to target patient CT data.  ... 
doi:10.1109/trpms.2018.2883437 pmid:30740582 pmcid:PMC6362464 fatcat:p4kq6sj2wbalxdhsfiyhw4bimi

IQ SPECT Allows a Significant Reduction in Administered Dose and Acquisition Time for Myocardial Perfusion Imaging: Evidence from a Phantom Study

F. Caobelli, S. R. Kaiser, J. T. Thackeray, F. M. Bengel, M. Chieregato, A. Soffientini, C. Pizzocaro, G. Savelli, M. Galelli, U. P. Guerra
2014 Journal of Nuclear Medicine  
These findings suggest that approximately one eighth of the time, compared with standard protocols with a full dose, or a lower dose at an acquisition time of 12 s/view can be applied in MPI without the  ...  Methods: An anthropomorphic cardiac phantom was used to acquire clinical rest scans with a simulated in vivo distribution of 99m Tc-tetrofosmin at full dose (740 MBq) and at doses equal to 50%, 25%, and  ...  Images were acquired on a hybrid dual-head SPECT/CT system (Symbia T; Siemens Medical Solutions AG) equipped with multifocal collimators (Smartzoom) of 128 • 128 matrix size and a zoom factor of 1.  ... 
doi:10.2967/jnumed.114.143560 pmid:25413138 fatcat:3cqgezh4avfqxjasx5ztsykke4

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  
The effectiveness of the proposed method compared with that of the conventional method was evaluated in terms of simulated CT values by using elliptical phantoms and an abdomen phantom.  ...  The effect of charge-sharing and Compton scattering is quantified with the aid of Monte Carlo simulations and verified on real synchrotron data.  ...  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

Strategies for attenuation compensation in neurological PET studies

Habib Zaidi, Marie-Louise Montandon, Steve Meikle
2007 NeuroImage  
compensation of brain PET data.  ...  Quantitative PET image reconstruction requires an accurate attenuation map of the object under study for the purpose of attenuation compensation.  ...  Acknowledgments This work was supported by the Swiss National Science Foundation under grant SNSF 3152A0-102143 and the Research and Development Foundation of Geneva University Hospital under grant PRD  ... 
doi:10.1016/j.neuroimage.2006.10.002 pmid:17113312 fatcat:tmo4haxpzfgstlaytty6syftea

Track O. Image Computing

P. Suhail Parvaze, S. Ramakrishnan
2016 Biomedical Engineering  
Recent study on Alzheimer's Disease (AD) have pointed towards brain stem to be the epicenter of the disease but few attempts have been made to decipher the effects of AD on brainstem structures.  ...  Resovist MNP at different concentrations were used as tracer to measure two system matrices and a tube phantom by MPI. The data were acquired on a Bruker pre-clinical MPI Scanner 25/20.  ...  Acknowledgement "SFB F3209-18", "HTI:Tech for Med" (ABT08-22-T-7/2013-13), BioTechMed-Graz Acknowledgements This work was funded by the Austrian Science Fund "SFB F3209-18" and by the funds of the Oesterreichische  ... 
doi:10.1515/bmt-2016-5013 pmid:27682695 fatcat:chpj7omugjbi5pisvul6xjhz7m

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)  
Method and Materials: We simulated the online positioning of an anthropomorphic chest phantom with 6 noncoplanar reference BBs attached. Planning CT data of the phantom were acquired with a G.E.  ...  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.  ...  beam hardening effects of the head.  ... 
doi:10.1118/1.2240759 fatcat:5we2nvgwx5hrxcv2ngufce6obq

Single Photon Emission Computed Tomography (SPECT) Myocardial Perfusion Imaging Guidelines: Instrumentation, Acquisition, Processing, and Interpretation

Sharmila Dorbala, Karthik Ananthasubramaniam, Ian S. Armstrong, Panithaya Chareonthaitawee, E. Gordon DePuey, Andrew J. Einstein, Robert J. Gropler, Thomas A. Holly, John J. Mahmarian, Mi-Ae Park, Donna M. Polk, Raymond Russell (+3 others)
2018 Journal of Nuclear Cardiology  
This noise reduction that occurs during the conversion of the CT to the attenuation map means the process is very robust, even with noisy CT data.  ...  Truncation of a CT-derived attenuation map can occur from two factors. The first is truncation of the CT data itself.  ... 
doi:10.1007/s12350-018-1283-y pmid:29802599 fatcat:tn6gmv6j3vdzhl2dhs22mxqhc4

Tissue mimicking materials for imaging and therapy phantoms: a review

Conor K McGarry, Lesley J Grattan, Aoife M Ivory, Francesca Leek, Gary P Liney, Yang Liu, Piero Miloro, Robba Rai, Andrew Robinson, Albert J Shih, Bajram Zeqiri, Catharine H Clark
2020 Physics in Medicine and Biology  
The emergence of image guided interventions and multimodality imaging have placed an increasing demand on the number of specifications on the latest TMMs.  ...  Materials used within phantoms have been reviewed for a series of imaging and therapeutic applications with the potential to become a testbed for cross-fertilization of materials across modalities.  ...  Thanks to Dr Christina Agnew for helpful comments on the manuscript.  ... 
doi:10.1088/1361-6560/abbd17 pmid:32998112 fatcat:fhrfsgdbhjadrj6p5cyt5bhw6q

Single photon-emission computed tomography

Thomas A. Holly, Brian G. Abbott, Mouaz Al-Mallah, Dennis A. Calnon, Mylan C. Cohen, Frank P. DiFilippo, Edward P. Ficaro, Michael R. Freeman, Robert C. Hendel, Diwakar Jain, Scott M. Leonard, Kenneth J. Nichols (+2 others)
2010 Journal of Nuclear Cardiology  
With regard to the prevalence of 20-40% of occult neck metastases found in the ND specimens, the majority of patients undergo surgery of the lymphatic drainage basin without therapeutic benefit.  ...  Previous reports suggested a benefit of single photon emission computed tomography with CT (SPECT/CT) over dynamic planar lymphoscintigraphy (LS) alone.  ...  Fusion of CT with SPECT has the added benefit of providing not only useful anatomic information but functional assessment as well.  ... 
doi:10.1007/s12350-010-9246-y pmid:20552312 fatcat:jrn7kubn45b3zjmtdwoln2pupa
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