Filters








590 Hits in 5.7 sec

Current and Novel Imaging Techniques in Coronary CT

Haruhiko Machida, Isao Tanaka, Rika Fukui, Yun Shen, Takuya Ishikawa, Etsuko Tate, Eiko Ueno
2015 Radiographics  
Whole-heart coverage with 320-detector CT and an intelligent boundary registration algorithm can eliminate stair-step artifacts.  ...  CT with a retrospective ECG-gated helical scan.  ...  -We thank Nobuo Iguchi, MD, PhD, Department of Cardiology, Sakakibara Heart Institute, Tokyo, Japan, for his provision of valuable images in Figure 3 . Disclosures of Conflicts of  ... 
doi:10.1148/rg.2015140181 pmid:26046942 fatcat:gge7yyghgvfsbemguvl75w42ze

The role of advanced reconstruction algorithms in cardiac CT

Sandra S. Halliburton, Yuki Tanabe, Sasan Partovi, Prabhakar Rajiah
2017 Cardiovascular Diagnosis and Therapy  
IR algorithms operate by initially generating an expected dataset based on modeling, which is then compared to the actual, acquired dataset.  ...  IR can also be used to improve image quality for imaging of obese patients, coronary atherosclerotic plaques, coronary stents, and myocardial perfusion.  ...  Coronary CT images of the mid left circumflex artery of an 81-year-old man after coronary stenting with three different reconstruction algorithms (A, FBP; B, iDose 4 ; C, IMR).  ... 
doi:10.21037/cdt.2017.08.12 pmid:29255694 pmcid:PMC5716948 fatcat:wa36vchxd5ci7gzcoioeamnl2i

Teleradiology network system using the web medical image conference system with a new information security solution

Hitoshi Satoh, Noboru Niki, Kenji Eguchi, Hironobu Ohmatsu, Masahiro Kusumoto, Masahiro Kaneko, Ryutaru Kakinuma, Noriyuki Moriyama, William W. Boonn, Brent J. Liu
2012 Medical Imaging 2012: Advanced PACS-based Imaging Informatics and Therapeutic Applications  
Confidential information is preserved at an individual Data Center connected through internet because individual medical information cannot be decoded by using one tally at all.  ...  We have developed the teleradiology network system with a new information security solution that provided with web medical image conference system.  ...  We would like to thank View Send ICT Corporation who is our research cooperator for providing the Web medical image conference system.  ... 
doi:10.1117/12.911431 fatcat:te4i2tdg5zg5vlcjtfngg2mcim

High-resolution 64-slice helical-computer-assisted-tomographical-angiography as a diagnostic tool before CABG surgery: the dawn of a new era?☆

Andre R. Simon, Hassina Baraki, Jörg Weidemann, Wolfgang Harringer, Michael Galanski, Axel Haverich
2007 European Journal of Cardio-Thoracic Surgery  
Objective: For the first time, technical developments in helical, high-resolution 64-slice computer-assisted-tomographical-scanning (CT) allows for analysis of cardiac pathology including coronary morphology  ...  Conclusions: CT-angiography sufficiently allows for target vessel determination for CABG.  ...  based on four particular questions: (1) Does helical, high-resolution 64-slice CT-scanning allow for accurate analysis of coronary morphology?  ... 
doi:10.1016/j.ejcts.2007.07.038 pmid:17964797 fatcat:banlm4ifqbgz3n2ru3ksh3eecm

Localizing Calcifications in Cardiac CT Data Sets Using a New Vessel Segmentation Approach

Stefan Wesarg, M. Fawad Khan, Evelyn A. Firle
2006 Journal of digital imaging  
Based on that image data, the heart can be analyzed in a noninvasive way-improving the diagnosis of cardiovascular malfunctions on one hand, and the planning of an eventually necessary intervention on  ...  One important parameter for the evaluation of the severeness of a coronary artery disease is the number and localization of calcifications (hard plaques).  ...  We want to thank the Institute for Diagnostic and Interventional Radiology of the Johann Wolfgang Goethe University Frankfurt, Germany for providing us the cardiac CT data sets.  ... 
doi:10.1007/s10278-006-9947-6 pmid:16741661 pmcid:PMC3045143 fatcat:xqqaj4agcfelrkvrt3kwjxtqky

Subendocardial Systolic Hypoperfusion in Stenotic Coronary Territories: Demonstration by 256-Slice Coronary CT Angiography

Michinobu Nagao
2014 Journal of Clinical Trials in Cardiology  
Purpose: We propose a new, Myocardial Perfusion Imaging (MPI) with coronary CTA, and investigate the diagnostic ability of subendocardial hypoperfusion for Coronary Artery Disease (CAD) based on degree  ...  CT-Myocardial Perfusion Image (MPI) was reconstructed at 4 cardiac phases (0%, 40%, 60%, and 80% of the R-R interval), applying CT number measured in Hounsfield Unit (HU) as an estimate of perfusion.  ...  Acknowledgement "This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (25461831)".  ... 
doi:10.15226/2374-6882/1/2/00107 fatcat:kq6zs3vi25horikfoqhna2qan4

Recent developments in cardiac CT

Noortje van der Bijl, Jacob Geleijns, Raoul MS Joemai, Jeroen J Bax, Joanne D Schuijf, Albert de Roos, Lucia JM Kroft
2011 Imaging in Medicine  
REVIEW With the introduction of 64-multidetector row CT, coronary CT angiography has become a clinical tool, owing to improved image quality and reduced breath-hold time, and contrast and radiation dose  ...  imaging and imaging congenital heart disease).  ...  .: Helical and single-slice conventional CT versus electron beam CT for the quantification of coronary artery calcification. AJR Am. J.  ... 
doi:10.2217/iim.11.7 fatcat:sadj5t47m5hpdppopzagn64gpi

Aortic Dissection: Diagnosis and Follow-up with Helical CT

Carmen Sebastià, Esther Pallisa, Sergi Quiroga, Agustí Alvarez-Castells, Rosa Dominguez, Arturo Evangelista
1999 Radiographics  
Helical computed tomography (CT) allows diagnosis of acute aortic dissection with a sensitivity and specificity of nearly 100%.  ...  With helical CT, a dissection involving the ascending aorta (type A in the Stanford classification) can be differentiated from one distal to the left subclavian artery (type B).  ...  Clinical suspicion of lowerextremity ischemia is based on the results of clinical examination of the legs; a confident diagnosis can be made with helical CT. s s s s s CONCLUSIONS Helical CT can be used  ... 
doi:10.1148/radiographics.19.1.g99ja0945 pmid:9925391 fatcat:uadk7ovcmfhr5cs4jsgde3y47y

Effect of iterative reconstruction on image quality in evaluating patients with coronary calcifications or stents during coronary computed tomography angiography: a pilot study

Ezgi Guler, Volkan Vural, Emre Unal, Ilgaz Cagatay Kose, Deniz Akata, Musturay Karcaaltincaba, Tuncay Hazirolan
2015 Anatolian Journal of Cardiology  
Methods: Thirty one consecutive patients were scanned with an electrocardiogram-gated helical technique on a dual-source CT system.  ...  Objective: To determine the effect of "Iterative Reconstruction in Image Space" (IRIS) on image quality by comparing reconstructions of both medium and sharp kernels when evaluating coronary calcifications  ...  Hence, the purpose of our study was to determine the effect of the IRIS algorithm on image quality by comparing reconstructions of both medium and sharp kernels when evaluating coronary calcific plaques  ... 
doi:10.5152/akd.2015.5920 pmid:26467371 pmcid:PMC5336725 fatcat:4itlaqkt7nhw5itmee5aqiqje4

SCCT guidelines on radiation dose and dose-optimization strategies in cardiovascular CT

Sandra S. Halliburton, Suhny Abbara, Marcus Y. Chen, Ralph Gentry, Mahadevappa Mahesh, Gilbert L. Raff, Leslee J. Shaw, Jörg Hausleiter
2011 Journal of cardiovascular computed tomography  
Over the last few years, computed tomography (CT) has developed into a standard clinical test for a variety of cardiovascular conditions.  ...  In an effort to aid the cardiovascular CT community in incorporating patient-centered radiation dose optimization and monitoring strategies into standard practice, the Society of Cardiovascular Computed  ...  Griffiths, scientific writer for the Imaging Institute, Cleveland Clinic, Cleveland, Ohio, for editorial assistance and Carla M. Thompson, MS, for assistance.  ... 
doi:10.1016/j.jcct.2011.06.001 pmid:21723512 pmcid:PMC3391026 fatcat:kzr73catdfhwpo2yq52go23eyq

Prospective Electrocardiogram-Gated Axial 64-Detector Computed Tomographic Angiography vs Retrospective Gated Helical Technique to Assess Coronary Artery Bypass Graft Anastomosis:

Haruhiko Machida, Ai Masukawa, Isao Tanaka, Rika Fukui, Kazufumi Suzuki, Eiko Ueno, Kojiro Kodera, Kiyoharu Nakano, Yun Shen
2010 Circulation Journal  
techniques on 64-detector computed tomographic (CT) angiography following coronary artery bypass graft surgery.  ...  Patient characteristics of the 2 groups were well matched, and the same CT scan parameters were used for both, except for the interval between surgery and CT examination, tube current, and image noise  ...  Acknowledgments We gratefully acknowledge Dr Mikihiko Fujimura and Dr Kazuyo Kita for their important advice on CT image quality assessment in this study.  ... 
doi:10.1253/circj.cj-09-0714 pmid:20154407 fatcat:rp2xvlnvbrhdjpgvudpvup6nqu

Vascular computed tomography angiography technique and indications

Vinit Baliyan, Khalid Shaqdan, Sandeep Hedgire, Brian Ghoshhajra
2019 Cardiovascular Diagnosis and Therapy  
Computed tomography angiography (CTA) is an imaging method of choice for a wide range of vascular diseases that span across different vascular territories.  ...  This review article is aimed to provide an overview of the technical considerations and clinical applications of CTA.  ...  The two simultaneous overlapping helices on dual-source CT enable image reconstruction at a high pitch of over 3:1.  ... 
doi:10.21037/cdt.2019.07.04 pmid:31559151 pmcid:PMC6732113 fatcat:tvyir5ezqjd47ocujay5zeopom

Vascular Diseases of the Thorax: Evaluation with Multidetector CT

Caroline Chiles, J. Jeffrey Carr
2005 The Radiologic clinics of North America  
The spatial resolution of multidetector CT (MDCT) is such that CT has become the imaging modality of choice for aortic dissection and PE.  ...  This move away from angiography has transpired over the last decade; perhaps the next decade will see the same occur for evaluation of coronary artery disease.  ...  The authors' practice uses CT coronary angiography as an integrated tool along with the other cardiac imaging modalities. They tailor the use of cardiac CT based on the clinical scenario.  ... 
doi:10.1016/j.rcl.2005.02.010 pmid:15847815 fatcat:bo5txjuzfjcnjnzzyija5pszbe

Ultra-High-Resolution Coronary CT Angiography for Assessment of Patients with Severe Coronary Artery Calcification: Initial Experience

Jacqueline Latina, Mahsima Shabani, Karan Kapoor, Seamus P Whelton, Jeffrey C Trost, Jaclyn Sesso, Shadpour Demehri, Mahadevappa Mahesh, João A C Lima, Armin Arbab-Zadeh
2021 Radiology: Cardiothoracic Imaging  
Reported herein are this study's initial observations on the potential of ultra-high-resolution CT (UHR-CT) for evaluating severely calcified coronary arterial lesions.  ...  Overall image noise was considerably greater for UHR-CT (50.9 ± 7.8 [standard deviation]) versus conventional CT image reconstruction (19.5 ± 8.3, P < .01), yet diagnostic confidence scores for UHR-CT  ...  On the basis of CORE-64 data, at least onethird of patients referred for invasive coronary angiography have severe coronary calcification or prior stent placement and thus would benefit from UHR-CT (6  ... 
doi:10.1148/ryct.2021210053 pmid:34498007 pmcid:PMC8415143 fatcat:mlfg72t5zvb2jbrefmou7rvx4a

CT Angiography: Current Technology and Clinical Use

Kanako K. Kumamaru, Bernice E. Hoppel, Richard T. Mather, Frank J. Rybicki
2010 The Radiologic clinics of North America  
Feldkamp-based cone-beam reconstruction for gantry-tilted helical multislice CT. Med Phys 2003;30(12):3233-3242. [PubMed: 14713090] 26.  ...  Retrospective EKG gating with helical CT can be used to freeze motion, either from the aortic root in CT aortography or for coronary CTA.  ... 
doi:10.1016/j.rcl.2010.02.006 pmid:20609871 pmcid:PMC2901244 fatcat:joznysaewrhuxnfnzvd7ckrkvi
« Previous Showing results 1 — 15 out of 590 results