Read by QxMD icon Read

Coronary coregistration

Jochen von Spiczak, Manoj Mannil, Sebastian Kozerke, Hatem Alkadhi, Robert Manka
BACKGROUND: Since patients with myocardial hypoperfusion due to coronary artery disease (CAD) with preserved viability are known to benefit from revascularization, accurate differentiation of hypoperfusion from scar is desirable. PURPOSE: To develop a framework for 3D fusion of whole-heart dynamic cardiac MR perfusion and late gadolinium enhancement (LGE) to delineate stress-induced myocardial hypoperfusion and scar. STUDY TYPE: Prospective feasibility study...
March 30, 2018: Journal of Magnetic Resonance Imaging: JMRI
Alessia Peli, Luca Camoni, Valentina Zilioli, Rexhep Durmo, Mattia Bonacina, Francesco Bertagna, Barbara Paghera, Raffaele Giubbini
BACKGROUND: Myocardial perfusion imaging is a well-established diagnostic tool in patients with known or suspected coronary artery disease. Numerous clinical trials have shown that attenuation correction (AC) in single photon emission computed tomography (SPECT) improves the diagnostic accuracy of myocardial perfusion imaging over non-AC SPECT, differentiating between scar and attenuation artifacts. We have previously shown that attenuation artifacts produce an overestimation of the size of inferior infarcts in the male population...
April 2018: Nuclear Medicine Communications
David M Leistner, Matthias Riedel, Lisa Steinbeck, Barbara E Stähli, Georg M Fröhlich, Alexander Lauten, Carsten Skurk, Hans-Christian Mochmann, Laura Lübking, Ursula Rauch-Kröhnert, Renate B Schnabel, Dirk Westermann, Stefan Blankenberg, Ulf Landmesser
AIMS: Intracoronary optical coherence tomography (OCT) imaging allows for high-resolution characterization of coronary lesions. Difficulties in matching cross-sectional OCT-images with angiographic lesion localization may limit optimal clinical utilization. We sought to prospectively assess the impact of a novel system of real-time OCT coregistration with angiography (ACR) on physician decision-making during percutaneous coronary interventions (PCI). METHODS AND RESULTS: Strategy for PCI (stent - length, - diameter, - strategy, landing zone) and PCI-optimization (stent-malappostion, -underexpansion, edge-dissections, geographical mismatch) was prospectively assessed in 50 patients with 58 coronary lesions after (I) angiography, (II) OCT imaging, and (III) ACR...
September 20, 2017: Catheterization and Cardiovascular Interventions
Marija Vukicevic, Bobak Mosadegh, James K Min, Stephen H Little
Three-dimensional (3D) printing is at the crossroads of printer and materials engineering, noninvasive diagnostic imaging, computer-aided design, and structural heart intervention. Cardiovascular applications of this technology development include the use of patient-specific 3D models for medical teaching, exploration of valve and vessel function, surgical and catheter-based procedural planning, and early work in designing and refining the latest innovations in percutaneous structural devices. In this review, we discuss the methods and materials being used for 3D printing today...
February 2017: JACC. Cardiovascular Imaging
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...
December 26, 2016: JACC. Cardiovascular Interventions
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"