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Quantification of Delayed Enhancement MR Images [chapter]

Engin Dikici, Thomas O'Donnell, Randolph Setser, Richard D. White
2004 Lecture Notes in Computer Science  
Delayed Enhancement MR is an imaging technique by which nonviable (dead) myocardial tissues appear with increased signal intensity.  ...  Therefore, we make use of MR Cine images acquired in the same session (in which the myocardium has a more predictable appearance) in order to create a prior model of the myocardial borders.  ...  Introduction Delayed enhancement magnetic resonance (DEMR) is an image acquisition technique applied typically to the left ventricle (LV), or the main pumping chamber of the heart, whereby non-viable tissue  ... 
doi:10.1007/978-3-540-30135-6_31 fatcat:coaru6kvfzbupgmgrmrznvckpm

Quantification of enhancement of left ventricular myocardium in patients with dilated cardiomyopathy using delayed enhanced MR imaging

Eijun Sueyoshi, Ichiro Sakamoto, Takeshi Hayashida, Masataka Uetani
2009 Computerized Medical Imaging and Graphics  
In DE MR imaging, the LV myocardium of DCM usually has high aCNR, which may suggest fibrosis. Quantification of aCNR may contribute to the diagnosis of DCM.  ...  The purpose is to evaluate delayed enhancement (DE) of the myocardium in patients with dilated cardiomyopathy (DCM), compared with control subjects.  ...  Scar or fibrosis is depicted as an area of high signal intensity on delayed enhancement (DE) MR images.  ... 
doi:10.1016/j.compmedimag.2009.05.005 pmid:19545975 fatcat:q5qldbstq5de7hbalnd4hbic7a

A Method to Standardize Quantification of Left Atrial Scar From Delayed-Enhancement MR Images

Rashed Karim, Aruna Arujuna, Richard James Housden, Jaspal Gill, Hannah Cliffe, Kavir Matharu, Jaswinder Gill, Christopher Aldo Rindaldi, Mark O'Neill, Daniel Rueckert, Reza Razavi, Tobias Schaeffter (+1 others)
2014 IEEE Journal of Translational Engineering in Health and Medicine  
The method offers a standardized quantification technique for evaluation and interpretation of DE-MRI scans. INDEX TERMS Delayed-enhancement MRI, left atrium, image segmentation, fibrosis.  ...  Delayed-enhancement magnetic resonance imaging (DE-MRI) is an effective technique for detecting left atrial (LA) fibrosis both pre and postradiofrequency ablation for the treatment of atrial fibrillation  ...  ACKNOWLEDGMENT The authors would like to thank members of the Division of Biomedical Engineering and Imaging Sciences, King's College London who assisted with this study.  ... 
doi:10.1109/jtehm.2014.2312191 pmid:27170868 pmcid:PMC4861547 fatcat:sbtztbiynzehzdlivqvlehxa7i

Agreement of left ventricular mass in steady state free precession and delayed enhancement MR images: implications for quantification of fibrosis in congenital and ischemic heart disease

Sigurdur S Stephensen, Marcus Carlsson, Martin Ugander, Henrik Engblom, Goran Olivecrona, David Erlinge, Hakan Arheden
2010 BMC Medical Imaging  
Quantification of LVM is interchangeably carried out in cine steady state free precession (SSFP) and delayed enhancement (DE) magnetic resonance imaging (MRI).  ...  There was no significant difference between SSFP and ex vivo LVM suggesting that SSFP is more accurate for LVM quantification.  ...  Myocardial infarction is quantified in delayed enhancement (DE) MRI where infarcted myocardium is hyperenhanced [11] .  ... 
doi:10.1186/1471-2342-10-4 pmid:20096134 pmcid:PMC2881013 fatcat:xdgtiepyorei3eo2pwdrnj4vbe

Validation of segmental visual scar quantification in ischemic and non-ischemic cardiomyopathy: Comparison to signal threshold analysis of delayed enhancement MR images

Nowell Fine, Matthew Brymer, Anna MacDonald, Maria Drangova, James White
2010 Journal of Cardiovascular Magnetic Resonance  
Background Visual evaluation of delayed enhancement (DE) MR images using a 5-point, 17-segment model is efficient and more practical than computerized quantitative signal analysis techniques.  ...  Comparison of visual scar quantification and signal-threshold based quantification was then performed using linear regression.  ... 
doi:10.1186/1532-429x-12-s1-p169 fatcat:2gzkvyr4ubccvba2pwc2vml4gm

1029 Agreement of left ventricular mass in steady state free precession (ssfp) and delayed enhancement (DE) MR images: implications for quantification of fibrosis in congenital and ischemic heart disease

Sigurdur S Stephensen, Marcus Carlsson, Peter Munkhammar, Hakan Arheden
2008 Journal of Cardiovascular Magnetic Resonance  
Journal of Cardiovascular Magnetic Resonance Open Access Meeting abstract Agreement of left ventricular mass in steady state free precession (ssfp) and delayed enhancement (DE) MR images: implications  ...  for quantification of fibrosis in congenital and ischemic heart disease  ...  Quantification of total left ventricular mass (LVM) can be carried out by delineating endo-and epicardium in steady state free precession (ssfp) cine images, but also in the delayed enhancement images.  ... 
doi:10.1186/1532-429x-10-s1-a154 fatcat:ivrycrg4pzfwre5cosjv52jwsy

Dual-Energy Computed Tomography in Diffuse Liver Diseases

Uday Kumar Marri, Kumble Seetharama Madhusudhan
2022 Journal of Gastrointestinal and Abdominal Radiology  
AbstractDual-energy computed tomography (DECT) is an advancement in the field of CT, where images are acquired at two energies.  ...  Continuous technological advances in CT scanner hardware, material decomposition algorithms, and image reconstruction software have led to considerable growth of these applications.  ...  quantification. 30 MR spectroscopy (MRS) has proven to be the most accurate imaging tool and has the potential to replace biopsies. 31 However, MRS can only quantify fat in a small area at a time and  ... 
doi:10.1055/s-0042-1742432 fatcat:rawt6rynaza4vepzaz2qmv5ecq

Quantitative Myocardial Perfusion MR Imaging

Yasutaka Ichikawa, Masaki Ishida, Hajime Sakuma
2019 Annals of Nuclear Cardiology  
Advances in acquisition and image analysis of cardiac magnetic resonance have enabled absolute myocardial perfusion quantification, previously only achievable with positron emission tomography.  ...  Myocardial perfusion can be assessed with dynamic cardiovascular magnetic resonance imaging (MRI) during the passage of contrast agent bolus.  ...  relationship between contrast enhancement and contrast concentration facilitates absolute perfusion quantification in contrast enhanced imaging.  ... 
doi:10.17996/anc.19-00096 fatcat:632o5pdvarf6jecty5jpd7p33u

Cardiovascular MR Imaging after Surgical Correction of Tetralogy of Fallot: Approach Based on Understanding of Surgical Procedures

Karen G. Ordovas, Stefano Muzzarelli, Michael D. Hope, David M. Naeger, Tom Karl, Gautham P. Reddy, Edson Marchiori, Charles B. Higgins
2013 Radiographics  
Figure 7 . 7 Delayed gadolinium-enhanced short-axis image demonstrates enhancement at the level of a transannular patch (arrows).  ...  Delayed contrast-enhanced images can show extensive areas of enhancement due to both fibrotic tissue enveloping the patch and adjacent areas of fibrosis (Fig 7) (19) .  ...  Pulmonary regurgitation is better visualized with SSFP cine images obtained parallel to the RVOT, which show a diastolic regurgitant jet across the pulmonary valve.  ... 
doi:10.1148/rg.334115084 pmid:23842971 fatcat:hdzyjyy5o5gstiscdpkutikeaq

Cardiac Magnetic Resonance Imaging for the Investigation of Cardiovascular Disorders. Part 1: Current Applications

Ajit H. Goenka, Scott D. Flamm
2014 Texas Heart Institute Journal  
role vis-à-vis conventional imaging techniques.  ...  Cardiac magnetic resonance imaging is a robust noninvasive technique for investigating cardiovascular disorders.  ...  Acknowledgment We are grateful for the editorial assistance of Megan M. Griffiths, scientific writer for the Imaging Institute, Cleveland Clinic.  ... 
doi:10.14503/thij-13-3920 pmid:24512394 pmcid:PMC3967467 fatcat:wvihiop2s5hp3fa5oxpvqtjwj4

Delayed contrast-enhanced cardiac MRI at an open 1.0T MR-system comparison of conventional segmented 3D gradient echo and phase-sensitive inversion recovery sequences: initial results

Ortrud Kosiek, Frank Fischbach, Bernhard Schnackenburg, Alexander Schmeisser, Jan Smid, Skadi Wilhelmsen, Uta Wonneberger, Katharina A Strach
2012 Journal of Cardiovascular Magnetic Resonance  
contrast enhanced (DE) cardiac MR imaging (cMRI) has become the gold standard for the in vivo detection and quantification of myocardial infarcts (MI).  ...  Delayed contrast-enhanced cardiac MRI at an open 1.0T MR-system comparison of conventional segmented 3D gradient echo and phase-sensitive inversion recovery sequences: initial results Background Delayed  ...  Image quality was excellent using approaches (A) and (B). Due to an arrhythmic breathing pattern image quality was reduced however still diagnostic for approach (C).  ... 
doi:10.1186/1532-429x-14-s1-p301 pmcid:PMC3305241 fatcat:kgiloiaxvnhv7gsqcoq5bk4ifa

Absolute Quantification of Left Ventricular Global and Regional Function at Nuclear MPI Using Ultrafast CZT SPECT: Initial Validation Versus Cardiac MR

H. Cochet, E. Bullier, E. Gerbaud, M. Durieux, Y. Godbert, M. Lederlin, P. Coste, J.-L. Barat, F. Laurent, M. Montaudon
2013 Journal of Nuclear Medicine  
Myocardial scarring was quantified on each segment using delayed enhanced cardiac MR. Agreement between SPECT and cardiac MR was assessed using Pearson correlation and Bland-Altman analyses.  ...  Methods: Sixty patients with known or suspected coronary artery disease underwent MPI using a CZT SPECT camera, as well as cine and delayed enhanced cardiac MR.  ...  Delayed enhanced short-axis images were segmented at a different time point by the same observer, who did not know the results of cine imaging.  ... 
doi:10.2967/jnumed.112.110577 pmid:23385955 fatcat:uj6krfkvavfb3dbzhbsuozsf7e

Contraction Function of the Left Ventricle in Patients with Dilated Cardiomyopathy: Comparison of Delayed Enhanced MR imaging and indine -123- metaiodobenzylguanidine (123I-MIBG) scintigram

Takeshi HAYASHIDA, Eijun SUEYOSHI, Ichiro SAKAMOTO, Masataka UETANI
2009 Acta Medica Nagasakiensia  
Quantification of DE MR imaging For DE MR imaging, it is important to determine the inversion time for obtaining optimal image contrast between normal and abnormal myocardium.  ...  MR delayed-enhanced image (repetition time msec/echo time msec/inversion time msec, 9.8/4.4/250; Flip angle, 25 degrees) shows diffuse delayed-enhanced areas in the left ventricular myocardium.  ... 
doi:10.11343/amn.54.1 fatcat:xm3fgocw2vftvkiddnhun7o72m

The Top Ten Cases in Cardiac MRI and the Most Important Differential Diagnoses [chapter]

Patricia Carreno-Moran, Julian Breeze, Michael R.
2013 Medical Imaging in Clinical Practice  
Fernández García-Hierro University Hospital of Salamanca, Spain for kindly providing many of the images discussed in this chapter. P.  ...  Carreño-Morán also acknowledges the European Society of Radiology for the award of a Fellowship in Cardioimaging in "angor UK in .  ...  Figure 21 .Figure 22 . 2122 A pattern-based approach to assessment of delayed enhancement in nonischemic cardiomyopathy using MR imaging.[7] Miocarditis: SSFP apical hypokinesia and thrombus.  ... 
doi:10.5772/53444 fatcat:ff553gdxn5h4ziar3rwopuxhee

Intravenous Delayed Gadolinium-Enhanced MR Imaging of the Endolymphatic Space: A Methodological Comparative Study

Rainer Boegle, Johannes Gerb, Emilie Kierig, Sandra Becker-Bense, Birgit Ertl-Wagner, Marianne Dieterich, Valerie Kirsch
2021 Frontiers in Neurology  
In-vivo non-invasive verification of endolymphatic hydrops (ELH) by means of intravenous delayed gadolinium (Gd) enhanced magnetic resonance imaging of the inner ear (iMRI) is rapidly developing into a  ...  Within the range of 0.1-0.2 mmol/kg Gd dosage and a 4 h ± 30 min time delay, SQ grading and 2D- or 3D-quantifications were independent of signal intensity (SI) and signal-to-noise ratio (SNR; FWE corrected  ...  In-vivo non-invasive verification of endolymphatic hydrops (ELH) by means of intravenous delayed gadolinium (Gd) enhanced magnetic resonance imaging of the inner ear (iMRI) is rapidly developing into a  ... 
doi:10.3389/fneur.2021.647296 pmid:33967941 pmcid:PMC8100585 fatcat:o7zz4g2j5zg6liys7eycr7fqmq
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