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Coronary coregistration

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https://www.readbyqxmd.com/read/27889345/histopathological-differential-diagnosis-of-optical-coherence-tomographic-image-interpretation-after-stenting
#1
Christoph Lutter, Hiroyoshi Mori, Kazuyuki Yahagi, Elena Ladich, Michael Joner, Robert Kutys, David Fowler, Maria Romero, Jagat Narula, Renu Virmani, Aloke V Finn
OBJECTIVES: The aim of this study was to identify histological features that correlate with terms commonly used to describe optical coherence tomographic (OCT) and optical frequency-domain imaging (OFDI) images of stented vessels, by means of a histopathological validation study using stented human coronary arteries. BACKGROUND: OCT imaging and OFDI are used to evaluate vascular responses to stent implantation. Descriptive terms such as "peristrut low attenuation" and "heterogeneous" have been used to describe neointimal characteristics that may have clinical relevance...
November 19, 2016: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/26247005/the-role-of-pet-quantification-in-cardiovascular-imaging
#2
Piotr Slomka, Daniel S Berman, Erick Alexanderson, Guido Germano
Positron Emission Tomography (PET) has several clinical and research applications in cardiovascular imaging. Myocardial perfusion imaging with PET allows accurate global and regional measurements of myocardial perfusion, myocardial blood flow and function at stress and rest in one exam. Simultaneous assessment of function and perfusion by PET with quantitative software is currently the routine practice. Combination of ejection fraction reserve with perfusion information may improve the identification of severe disease...
August 1, 2014: Clinical and Translational Imaging: Reviews in Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/23866192/optimization-of-tryton-dedicated-coronary-bifurcation-system-with-coregistration-of-optical-coherence-tomography-and-fractional-flow-reserve
#3
Stylianos A Pyxaras, Shengxian Tu, Emanuele Barbato, Johan H C Reiber, William Wijns
No abstract text is available yet for this article.
July 2013: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/23552276/image-guided-intracranial-endosonography
#4
Naureen Keric, Sven R Kantelhardt, Axel Neulen, Peter Dechent, Antonia Henning, Fritz C Vollmer, Ingmar Thiemann, Alf Giese
BACKGROUND: Although the skull limits applicability of sonography, bedside intracranial endosonography might be an alternative to computed tomography scans to detect adverse events in sedated patients. However, the usefulness of intracranial endosonography for potential clinical application has not been evaluated. The present study was designed to investigate the suitability of an image-guided intracranial endosonography (IGIE) catheter for intracranial ultrasound imaging in an ex vivo phantom model and in a large animal model...
July 2013: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/23539216/tissue-characterization-after-drug-eluting-stent-implantation-using-optical-coherence-tomography
#5
COMPARATIVE STUDY
Caroline Malle, Tomohisa Tada, Kristin Steigerwald, Giovanni J Ughi, Tibor Schuster, Masataka Nakano, Steffen Massberg, Johannes Jehle, Giulio Guagliumi, Adnan Kastrati, Renu Virmani, Robert A Byrne, Michael Joner
OBJECTIVE: To validate optical coherence tomography (OCT) imaging for assessment of vascular healing in a preclinical animal model and human autopsy cases and to translate the findings to the assessment of vascular healing after drug-eluting stent implantation in clinical practice. APPROACH AND RESULTS: Drug-eluting and bare metal stents were imaged 28 and 42 days after implantation in atherosclerotic rabbits using OCT and simultaneously evaluated by histology. After coregistration with histology, gray-scale signal intensity (GSI) was measured for identified mature or immature neointimal tissue...
June 2013: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/23139087/pet-of-glucagonlike-peptide-receptor-upregulation-after-myocardial-ischemia-or-reperfusion-injury
#6
Haokao Gao, Dale O Kiesewetter, Xiaoxiang Zhang, Xinglu Huang, Ning Guo, Lixin Lang, Naoki Hida, Hui Wang, Haichang Wang, Feng Cao, Gang Niu, Xiaoyuan Chen
UNLABELLED: Glucagonlike peptide (GLP-1) and its receptor (GLP-1R) exhibit cardioprotective effects after myocardial ischemia and reperfusion (MI/R) in both animal studies and clinical trials. However, the kinetics of GLP-1R expression in the infarcted/ischemic myocardium has not yet been explored. The purpose of this study was to monitor the presence and time course of regional myocardial GLP-1R expression after MI/R with noninvasive PET. METHODS: Male Sprague-Dawley rats underwent a 45-min transient left coronary artery occlusion, followed by reperfusion...
December 2012: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/22872371/molecular-imaging-in-atherosclerosis-fdg-pet
#7
REVIEW
David Rosenbaum, Antoine Millon, Zahi A Fayad
18F-FDG PET is a new noninvasive tool for inflammation functional imaging. Low spatial resolution is now compensated by coregistration with CT or MRI. New mechanistic insights have emerged from animal and histology to explain the obtained signals by hypoxia, macrophage infiltration, and differentiation. Mixed results have been found in biomarkers studies. Interesting data have come recently linking plaque anatomy and function in carotids and in aortic aneurysms as well as inflammation and events. In coronary arteries, plaque assessment is still hampered by myocardium uptake but developments are being made...
October 2012: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/22285583/automated-quantification-of-coronary-plaque-with-computed-tomography-comparison-with-intravascular-ultrasound-using-a-dedicated-registration-algorithm-for-fusion-based-quantification
#8
COMPARATIVE STUDY
Mark J Boogers, Alexander Broersen, Joëlla E van Velzen, Fleur R de Graaf, Heba M El-Naggar, Pieter H Kitslaar, Jouke Dijkstra, Victoria Delgado, Eric Boersma, Albert de Roos, Joanne D Schuijf, Martin J Schalij, Johan H C Reiber, Jeroen J Bax, J Wouter Jukema
AIMS: Previous studies have used semi-automated approaches for coronary plaque quantification on multi-detector row computed tomography (CT), while an automated quantitative approach using a dedicated registration algorithm is currently lacking. Accordingly, the study aimed to demonstrate the feasibility and accuracy of automated coronary plaque quantification on cardiac CT using dedicated software with a novel 3D coregistration algorithm of CT and intravascular ultrasound (IVUS) data sets...
April 2012: European Heart Journal
https://www.readbyqxmd.com/read/21918043/complementary-value-of-cardiac-fdg-pet-and-ct-for-the-characterization-of-atherosclerotic-disease
#9
REVIEW
Paul Stolzmann, Sharath Subramanian, Amr Abdelbaky, Pál Maurovich-Horvat, Hans Scheffel, Ahmed Tawakol, Udo Hoffmann
For decades, the identification of significant luminal narrowing has been the hallmark to characterize the presence and extent of coronary artery disease. However, it is now known that characterizations of systemic atherosclerosis burden and inflammation, as well as the local quality of plaque composition and morphology, allow better characterization of coronary artery disease and thus may allow improved prediction of adverse cardiovascular events. Plaque characterized histologically as a thin-cap fibroatheroma (ie, an atheroma with a thin fibrous cap, an underlying lipid-rich necrotic core, and inflammatory activity) has been recognized as representing vulnerable or high-risk plaque...
September 2011: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/21531087/quantifying-the-reproducibility-of-heart-position-during-treatment-and-corresponding-delivered-heart-dose-in-voluntary-deep-inhalation-breath-hold-for-left-breast-cancer-patients-treated-with-external-beam-radiotherapy
#10
Alyson McIntosh, Asal N Shoushtari, Stanley H Benedict, Paul W Read, Krishni Wijesooriya
PURPOSE: Voluntary deep inhalation breath hold (VDIBH) reduces heart dose during left breast irradiation. We present results of the first study performed to quantify reproducibility of breath hold using bony anatomy, heart position, and heart dose for VDIBH patients at treatment table. METHODS AND MATERIALS: Data from 10 left breast cancer patients undergoing VDIBH whole-breast irradiation were analyzed. Two computed tomography (CT) scans, free breathing (FB) and VDIBH, were acquired to compare dose to critical structures...
November 15, 2011: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/21349459/prospective-validation-of-standardized-3-dimensional-quantitative-coronary-computed-tomographic-plaque-measurements-using-radiofrequency-backscatter-intravascular-ultrasound-as-reference-standard-in-intermediate-coronary-arterial-lesions-results-from-the-atlanta
#11
COMPARATIVE STUDY
Szilard Voros, Sarah Rinehart, Zhen Qian, Gustavo Vazquez, Hunt Anderson, Laura Murrieta, Charles Wilmer, Harold Carlson, Kenneth Taylor, William Ballard, Dimitri Karmpaliotis, Anna Kalynych, Charles Brown
OBJECTIVES: This study sought to determine the accuracy of 3-dimensional, quantitative measurements of coronary plaque by computed tomography angiography (CTA) against intravascular ultrasound with radiofrequency backscatter analysis (IVUS/VH). BACKGROUND: Quantitative, 3-dimensional coronary CTA plaque measurements have not been validated against IVUS/VH. METHODS: Sixty patients in a prospective study underwent coronary X-ray angiography, IVUS/VH, and coronary CTA...
February 2011: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/20229898/nonlinear-registration-of-serial-coronary-ct-angiography-ccta-for-assessment-of-changes-in-atherosclerotic-plaque
#12
Jonghye Woo, Damini Dey, Victor Y Cheng, Byung-Woo Hong, Amit Ramesh, Ganesh Sundaramoorthi, Ryo Nakazato, Daniel S Berman, Guido Germano, C C Jay Kuo, Piotr J Slomka
PURPOSE: Coronary CT angiography (CCTA) is a high-resolution three-dimensional imaging technique for the evaluation of coronary arteries in suspected or confirmed coronary artery disease (CAD). Coregistration of serial CCTA scans would allow precise superimposition of images obtained at two different points in time, which could aid in recognition of subtle changes and precise monitoring of coronary plaque progression or regression. To this end, the authors aimed at developing a fully automatic nonlinear volume coregistration for longitudinal CCTA scan pairs...
February 2010: Medical Physics
https://www.readbyqxmd.com/read/19759104/quantitative-analysis-of-myocardial-perfusion-spect-anatomically-guided-by-coregistered-64-slice-coronary-ct-angiography
#13
Piotr J Slomka, Victor Y Cheng, Damini Dey, Jonghye Woo, Amit Ramesh, Serge Van Kriekinge, Yasuzuki Suzuki, Yaron Elad, Ronald Karlsberg, Daniel S Berman, Guido Germano
UNLABELLED: Sequential testing by coronary CT angiography (CTA) and myocardial perfusion SPECT (MPS) obtained on stand-alone scanners may be needed to diagnose coronary artery disease in equivocal cases. We have developed an automated technique for MPS-CTA registration and demonstrate its utility for improved MPS quantification by guiding the coregistered physiologic (MPS) with anatomic CTA information. METHODS: Automated registration of MPS left ventricular (LV) surfaces with CTA coronary trees was accomplished by iterative minimization of voxel differences between presegmented CTA volumes and motion-frozen MPS data...
October 2009: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/19245963/integration-of-multislice-computed-tomography-with-magnetic-navigation-facilitates-percutaneous-coronary-interventions-without-additional-contrast-agents
#14
Steve Ramcharitar, Francesca Pugliese, Carl Schultz, Jurgen Ligthart, Pim de Feyter, Huling Li, Nico Mollet, Martin van de Ent, Patrick W Serruys, Robert Jan van Geuns
OBJECTIVES: We hypothesized that percutaneous coronary intervention (PCI) without additional contrast agents can be performed by directly integrating multislice computed tomography coronary angiography (CTCA) within the magnetic navigation system (MNS). BACKGROUND: Increasingly, CTCA is being used in the diagnostic work-up of patients with coronary disease. Its inherent 3-dimensional information should be exploited, as it potentially offers advantages over 2-dimensional radiography in guiding invasive diagnostic and therapeutic interventions...
March 3, 2009: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/18695562/-target-bypass-a-method-for-preoperative-targeting-of-a-recipient-artery-in-superficial-temporal-artery-to-middle-cerebral-artery-anastomoses
#15
Ken-ichiro Kikuta, Yasushi Takagi, Yasutaka Fushimi, Kouichi Ishizu, Tsutomu Okada, Takashi Hanakawa, Yukio Miki, Hidenao Fukuyama, Kazuhiko Nozaki, Nobuo Hashimoto
OBJECTIVE: To introduce a method for preoperative targeting of a proper recipient artery in superficial temporal artery-to-middle cerebral artery anastomosis. METHODS: Six operations for superficial temporal artery-to-middle cerebral artery anastomosis in four patients with moyamoya disease or moyamoya-like disease and two operations in two patients with atherosclerotic cerebrovascular occlusive disease accompanied by coronary artery stenosis were performed using our method...
June 2008: Neurosurgery
https://www.readbyqxmd.com/read/18583218/interactive-3d-hybrid-pet-ct-imaging-in-the-identification-of-myocardial-viability-in-patients-after-myocardial-infarction-feasibility-study-and-clinical-implications
#16
Yen-Wen Wu, Wen-Jeng Lee, Tzung-Dau Wang, Wei-Te Lin, Ruoh-Fang Yen, I-Hui Wu, Kai-Yuan Tzen, Wen-Yih I Tseng
BACKGROUND/PURPOSE: Clinical decision-making in coronary artery disease requires integrated information on myocardial viability and coronary arteries, and cross-modality registration could facilitate this process. The recent emergence of hybrid positron emission tomography (PET)/computed tomography (CT) allows acquisition of this information in one study session; however, clinically useful software capable of presenting three-dimensional (3D) fused images to assess the relationship between myocardium and coronary arteries is limited...
June 2008: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/18413384/reducing-radiation-dose-in-rest-stress-cardiac-pet-ct-by-single-poststress-cine-ct-for-attenuation-correction-quantitative-validation
#17
K Lance Gould, Tinsu Pan, Catalin Loghin, Nils P Johnson, Stefano Sdringola
UNLABELLED: Cardiac PET/CT is optimized by cine CT with dedicated shift software for manual correction of attenuation-emission misregistration. Separate rest and stress CT scans incur greater radiation dose to patients than does standard helical PET/CT or "pure" PET using rotating rod attenuation sources. To reduce radiation dose, we tested quantitative accuracy of using a single poststress cine CT attenuation scan for reconstructing rest perfusion images to eliminate resting CT attenuation scans...
May 2008: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/18375924/imaging-of-vegf-receptor-in-a-rat-myocardial-infarction-model-using-pet
#18
Martin Rodriguez-Porcel, Weibo Cai, Olivier Gheysens, Jürgen K Willmann, Kai Chen, Hui Wang, Ian Y Chen, Lina He, Joseph C Wu, Zi-bo Li, Khalid A Mohamedali, Sehoon Kim, Michael G Rosenblum, Xiaoyuan Chen, Sanjiv Sam Gambhir
UNLABELLED: Myocardial infarction (MI) leads to left ventricular (LV) remodeling, which leads to the activation of growth factors such as vascular endothelial growth factor (VEGF). However, the kinetics of a growth factor's receptor expression, such as VEGF, in the living subject has not yet been described. We have developed a PET tracer (64Cu-DOTA-VEGF121 [DOTA is 1,4,7,10-tetraazadodecane-N,N',N'',N'''-tetraacetic acid]) to image VEGF receptor (VEGFR) expression after MI in the living subject...
April 2008: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/17574974/frequent-diagnostic-errors-in-cardiac-pet-ct-due-to-misregistration-of-ct-attenuation-and-emission-pet-images-a-definitive-analysis-of-causes-consequences-and-corrections
#19
K Lance Gould, Tinsu Pan, Catalin Loghin, Nils P Johnson, Ashrith Guha, Stefano Sdringola
UNLABELLED: Cardiac PET combined with CT is rapidly expanding despite artifactual defects and false-positive results due to misregistration of PET and CT attenuation correction data-the frequency, cause, and correction of which remain undetermined. METHODS: Two hundred fifty-nine consecutive patients underwent diagnostic rest-dipyridamole myocardial perfusion PET/CT using (82)Rb, a 16-slice PET/CT scanner, helical CT attenuation correction with breathing and also at end-expiratory breath-hold, and averaged cine CT data during breathing...
July 2007: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/17041500/-target-bypass-a-method-for-preoperative-targeting-of-a-recipient-artery-in-superficial-temporal-artery-to-middle-cerebral-artery-anastomoses
#20
Ken-ichiro Kikuta, Yasushi Takagi, Yasutaka Fushimi, Kouichi Ishizu, Tsutomu Okada, Takashi Hanakawa, Yukio Miki, Hidenao Fukuyama, Kazuhiko Nozaki, Nobuo Hashimoto
OBJECTIVE: To introduce a method for preoperative targeting of a proper recipient artery in superficial temporal artery-to-middle cerebral artery anastomosis. METHODS: Six operations for superficial temporal artery-to-middle cerebral artery anastomosis in four patients with moyamoya disease or moyamoya-like disease and two operations in two patients with atherosclerotic cerebrovascular occlusive disease accompanied by coronary artery stenosis were performed using our method...
October 2006: Neurosurgery
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