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https://www.readbyqxmd.com/read/28108928/cme-instructions-patient-preparation-for-cardiac-fluorine-18-fluorodeoxyglucose-positron-emission-tomography-imaging-of-inflammation
#1
(no author information available yet)
No abstract text is available yet for this article.
February 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28105177/-18-f-fluoroethyl-l-tyrosine-positron-emission-tomography-guided-diagnosis-of-a-malignant-intramedullary-spinal-cord-tumor
#2
Sied Kebir, Okka Kimmich, Pitt Niehusmann, Florian C Gaertner, Markus Essler, Jennifer Landsberg, Thomas Klockgether, Matthias Simon, Ulrich Herrlinger, Martin Glas
Diagnosis in patients with a suspected malignant intramedullary lesion that requires biopsy for definitive diagnosis may be challenging, as spinal cord surgery carries the risk of irreversible neurological deficits. The current study presents the first case of (18)F-fluoroethyl-L-tyrosine ((18)F-FET) positron emission tomography (PET) imaging in a patient with a spinal cord tumor. The patient was unsuitable for magnetic resonance imaging due to his implanted cardiac defibrillator. (18)F-FET PET indicated a high-grade malignancy of the spinal cord, justifying tumor biopsy...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28091604/polyglucose-nanoparticles-with-renal-elimination-and-macrophage-avidity-facilitate-pet-imaging-in-ischaemic-heart-disease
#3
Edmund J Keliher, Yu-Xiang Ye, Gregory R Wojtkiewicz, Aaron D Aguirre, Benoit Tricot, Max L Senders, Hannah Groenen, Francois Fay, Carlos Perez-Medina, Claudia Calcagno, Giuseppe Carlucci, Thomas Reiner, Yuan Sun, Gabriel Courties, Yoshiko Iwamoto, Hye-Yeong Kim, Cuihua Wang, John W Chen, Filip K Swirski, Hsiao-Ying Wey, Jacob Hooker, Zahi A Fayad, Willem J M Mulder, Ralph Weissleder, Matthias Nahrendorf
Tissue macrophage numbers vary during health versus disease. Abundant inflammatory macrophages destruct tissues, leading to atherosclerosis, myocardial infarction and heart failure. Emerging therapeutic options create interest in monitoring macrophages in patients. Here we describe positron emission tomography (PET) imaging with (18)F-Macroflor, a modified polyglucose nanoparticle with high avidity for macrophages. Due to its small size, Macroflor is excreted renally, a prerequisite for imaging with the isotope flourine-18...
January 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28081128/radiation-exposure-from-diagnostic-imaging-in-a-cohort-of-pediatric-transplant-recipients
#4
Alexandra Seal, Michael Hawkes, Ravi Bhargava, Michelle Noga, Jutta Preiksaitis, Curtis Mabilangan, Joan Robinson
Recipients of solid organ transplants (SOT) have extensive diagnostic imaging (DI). The purpose of this study was to quantify this exposure. Children from northern Alberta with SOTs at Stollery Children's Hospital, Edmonton, Alberta January 1, 2006, to July 31, 2012, were included. Effective doses of radiation were estimated using published norms for DI performed post-transplant up to October 16, 2014. The 54 eligible children had 6215 DI studies (5628 plain films, 293 computerized tomography (CT) scans, 149 positron emission topography (PET) -CT scans, 47 nuclear medicine scans and 98 cardiac catheterizations)...
2017: PloS One
https://www.readbyqxmd.com/read/28072574/motion-compensation-using-origin-ensembles-in-awake-small-animal-positron-emission-tomography
#5
John E Gillam, Georgios I Angelis, Andre Z Kyme, Steven R Meikle
In emission tomographic imaging, the stochastic origin ensembles algorithm provides unique information regarding the detected counts given the measured data. Precision in both voxel and region-wise parameters may be determined for a single data set based on the posterior distribution of the count density allowing uncertainty estimates to be allocated to quantitative measures. Uncertainty estimates are of particular importance in awake animal neurological and behavioral studies for which head motion, unique for each acquired data set, perturbs the measured data...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28058674/quantitative-myocardial-blood-flow-imaging-with-integrated-time-of-flight-pet-mr
#6
Tanja Kero, Jonny Nordström, Hendrik J Harms, Jens Sörensen, Håkan Ahlström, Mark Lubberink
BACKGROUND: The use of integrated PET-MR offers new opportunities for comprehensive assessment of cardiac morphology and function. However, little is known on the quantitative accuracy of cardiac PET imaging with integrated time-of-flight PET-MR. The aim of the present work was to validate the GE Signa PET-MR scanner for quantitative cardiac PET perfusion imaging. Eleven patients (nine male; mean age 59 years; range 46-74 years) with known or suspected coronary artery disease underwent (15)O-water PET scans at rest and during adenosine-induced hyperaemia on a GE Discovery ST PET-CT and a GE Signa PET-MR scanner...
December 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28055829/validation-of-a-multimodality-flow-phantom-and-its-application-for-assessment-of-dynamic-spect-and-pet-technologies
#7
Hanif Gabrani-Juma, Owen J Clarkin, Amir Pourmoghaddas, Brandon Driscoll, R Glenn Wells, Robert A deKemp, Ran Klein
Simple and robust techniques are lacking to assess performance of flow quantification using dynamic imaging. We therefore developed a method to qualify flow quantification technologies using a physical compartment exchange phantom and image analysis tool. We validate and demonstrate utility of this method using dynamic PET and SPECT. Dynamic image sequences were acquired on two PET/CT and a cardiac dedicated SPECT (with and without attenuation and scatter corrections) systems. A two-compartment exchange model was fit to image derived time-activity curves to quantify flow rates...
January 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28054182/takotsubo-cardiomyopathy-fdg-myocardial-uptake-pattern-in-fasting-patients-comparison-of-pet-ct-spect-and-echo-results
#8
Malgorzata Kobylecka, Monika Budnik, Janusz Kochanowski, Radoslaw Piatkowski, Marek Chojnowski, Katarzyna Fronczewska-Wieniawska, Tomasz Mazurek, Joanna Maczewska, Michał Peller, Grzegorz Opolski, Leszek Krolicki
BACKGROUND: The aim of this study was to assess the accumulation pattern of 18F-FDG in fasting patients with takotsubo cardiomyopathy (TTC) and to correlate the results with perfusion scintigraphy and echocardiography. METHODS: 18 consecutive patients with TTC were identified by clinical symptoms, cardiac catheterization, and echocardiography. Coronary angiography (CA) and transthoracic echocardiography (TTE) were performed on the day of the onset of symptoms. An assessment of myocardial perfusion (99mTc-MIBI) and glucose metabolism (18F-FDG) was performed within 18 days...
January 4, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28052965/the-sglt2-inhibitor-dapagliflozin-prevents-cardiomyopathy-in-a-diabetic-lipodystrophic-mouse-model
#9
Michael Joubert, Benoît Jagu, David Montaigne, Xavier Marechal, Angela Tesse, Audrey Ayer, Lucile Dollet, Cédric Le May, Gilles Toumaniantz, Alain Manrique, Flavien Charpentier, Bart Staels, Jocelyne Magré, Bertand Cariou, Xavier Prieur
Type 2 diabetes mellitus (T2DM) is a well-recognized independent risk factor for heart failure (HF). T2DM is associated with altered cardiac energy metabolism, leading to ectopic lipid accumulation and glucose overload, the exact contribution of these two parameters remaining unclear. To provide new insight into the mechanism driving the development of diabetic cardiomyopathy, we studied a unique model of T2DM: lipodystrophic Bscl2(-/-) (seipin knockout (SKO)) mice. Echocardiography and cardiac magnetic resonance imaging revealed hypertrophic cardiomyopathy with left ventricular dysfunction in SKO mice and these two abnormalities were strongly correlated with hyperglycemia...
January 4, 2017: Diabetes
https://www.readbyqxmd.com/read/28050751/clinical-utility-of-18-f-fdg-positron-emission-tomography-computed-tomography-scan-vs-99m-tc-hmpao-white-blood-cell-single-photon-emission-computed-tomography-in-extra-cardiac-work-up-of-infective-endocarditis
#10
Trine K Lauridsen, Kasper K Iversen, Nikolaj Ihlemann, Philip Hasbak, Annika Loft, Anne K Berthelsen, Anders Dahl, Danijela Dejanovic, Elisabeth Albrecht-Beste, Jann Mortensen, Andreas Kjær, Henning Bundgaard, Niels Eske Bruun
The extra-cardiac work-up in infective endocarditis (IE) comprises a search for primary and secondary infective foci. Whether (18)FDG-PET/CT or WBC-SPECT/CT is superior in detection of clinically relevant extra-cardiac manifestations in IE is unexplored. The objectives of this study were to identify the numbers of positive findings detected by each imaging modality, to evaluate the clinical relevance of these findings and to define the reproducibility for extra-cardiac foci in patients with definite IE. Each modality was evaluated for numbers and location of positive extra-cardiac foci in patients with definite IE...
January 3, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28047621/su-f-i-31-reproducibility-of-an-automatic-exposure-control-technique-in-the-low-dose-ct-scan-of-cardiac-pet-ct-exams
#11
M Park, D Rosica, V Agarwal, M Di Carli, S Dorbala
PURPOSE: Two separate low-dose CT scans are usually performed for attenuation correction of rest and stress N-13 ammonia PET/CT myocardial perfusion imaging (PET/CT). We utilize an automatic exposure control (AEC) technique to reduce CT radiation dose while maintaining perfusion image quality. Our goal is to assess the reproducibility of displayed CT dose index (CTDI) on same-day repeat CT scans (CT1 and CT2). METHODS: Retrospectively, we reviewed CT images of PET/CT studies performed on the same day...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047485/su-f-i-56-high-precision-gamma-ray-analysis-of-medical-isotopes
#12
N Chopra, T Chillery, E McCutchan, P Chowdhury, C Smith, C Lister
PURPOSE: Advanced, time-resolved, Compton-suppressed gamma-ray spectroscopy with germanium detectors is implemented for assaying medical isotopes to study the radioactive decay process leading to a more accurate appraisal of the received dose and treatment planning. Lowell's Array for Radiological Assay (LARA), a detector array that is comprised of six Compton-suppressed high-purity germanium detectors, is currently under development at UMass-Lowell which combines Compton-suppression and time-and-angle correlations to allow for highly efficient and highly sensitive measurements...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047200/tu-h-206-07-assessment-of-geometric-distortion-in-epi-with-a-spamm-tagged-acquisition
#13
K Hwang, J Meier, J Yung, R Stafford
PURPOSE: Echo planar imaging (EPI) is known to exhibit gross geometric distortion caused by multiple factors, including B0 inhomgeneity and transient eddy currents. However, diffusion weighted (DW) EPI has become indispensable for diagnosis and therapy assessment. We propose a methodology for quantifying distortion in EPI sequences that does not require the use of dedicated spatial accuracy phantoms, enabling flexibility in phantom design for QA of distortion effects in EPI protocols...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046380/we-fg-202-06-the-use-of-hybrid-pet-mri-for-identifying-the-presence-of-cardiac-inflammation-following-external-beam-irradiation
#14
O El-Sherif, I Xhaferllari, J Sykes, J Butler, J Battista, G Wisenberg, F Prato, S Gaede
PURPOSE: To monitor the evolution of radiation-induced cardiac inflammation in a canine model using hybrid positron emission tomography (PET/magnetic resonance imaging (MRI). METHODS: Research ethics approval was obtained for a longitudinal imaging study of 5 canines after cardiac irradiation. Animals were imaged at baseline, 3 months, 6 months, and 12 months post cardiac irradiation using a hybrid PET-MRI system (Biograph mMR, Siemens Healthcare). The imaging protocol was designed to assess changes in cardiac inflammation using (18) F-fluorodeoxyglucose ((18) F-FDG) PET tracer...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28027743/igg4-related-cardiovascular-disease-the-emerging-role-of-cardiovascular-imaging
#15
REVIEW
Sophie Mavrogeni, George Markousis-Mavrogenis, Genovefa Kolovou
Immunoglobulin 4-related disease (IgG4-related disease) is a systemic inflammatory disease that presents with increases of serum IgG4. It may affect various systems, including the cardiovascular (CV) system. Assessment of serum IgG4 levels and involved organ biopsy are necessary for diagnosis. IgG4-related disease is characterized by fibrosclerosis, lymphocytic infiltration and presence of IgG4-positive plasma cells. The disease usually responds to treatment with corticosteroids and/or immunosuppressive medication...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28025184/hot-stuff-a-rare-diagnosis-of-a-mitral-valve-mass-confirmed-on-cardiac-fludeoxyglucose-positron-emission-tomography
#16
James Lewis Gentry, Matt Kalaycio, Samuel Tay Chao, Christine Louise Jellis
No abstract text is available yet for this article.
December 23, 2016: European Heart Journal
https://www.readbyqxmd.com/read/28009947/root-replacement-for-graft-infection-using-an-all-biologic-xenopericardial-conduit
#17
Sabina P W Guenther, Angela Reichelt, Sven Peterss, Maximilian Luehr, Erik Bagaev, Christian Hagl, Maximilian A Pichlmaier, Nawid Khaladj
BACKGROUND: The management of graft infection following ascending aortic replacement (AAR) and/or aortic valve replacement (AVR) with destruction of the root remains a challenge. Besides technical issues, the choice of graft material is controversial. The study aim was to investigate the initial results of aortic root replacement (ARR) as redo-surgery for infection using the xenopericardial all-biologic conduit (BioIntegral) as an alternative to a homograft or prosthetic material. METHODS: Between February 2013 and January 2015, a total of 18 consecutive patients (16 males, two females; mean age 61 ± 14 years) were reoperated on for infection at a mean of 55 ± 61 months (range: 3 to 219 months) following previous AVR (n = 6), supracoronary aortic replacement (SAR, n = 2), AVR + SAR (n = 1), root replacement (n = 7), and root reconstruction (n = 2)...
July 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28004791/free-triiodothyronine-level-correlates-with-myocardial-injury-and-prognosis-in-idiopathic-dilated-cardiomyopathy-evidence-from-cardiac-mri-and-spect-pet-imaging
#18
Wenyao Wang, Haixia Guan, Wei Fang, Kuo Zhang, A Martin Gerdes, Giorgio Iervasi, Yi-Da Tang
Thyroid dysfunction is associated with poor prognosis in heart failure, but theories of mechanisms are mainly based on animal experiments, not on human level. We aimed to explore the relation between thyroid function and myocardial injuries in idiopathic dilated cardiomyopathy (IDCM) using cardiac magnetic resonance imaging (MRI), single-photon emission computed tomography (SPECT) and positron emission tomography (PET). Myocardial fibrosis was detected by late gadolinium enhancement (LGE) MRI, and myocardial perfusion/metabolism was evaluated by (99m)Tc-MIBI SPECT /(18)F-FDG PET imaging...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28000164/respiratory-average-ct-for-attenuation-correction-in-myocardial-perfusion-spect-ct
#19
Duo Zhang, Bang-Hung Yang, Nien Yun Wu, Greta Seng Peng Mok
OBJECTIVE: Cine average CT (CACT) and interpolated average CT (IACT) have been proposed to improve attenuation correction (AC) for PET/CT in oncologic and cardiac studies. This study aims to evaluate their effectiveness on myocardial perfusion SPECT/CT using computer simulation and physical phantom experiments. METHODS: We first simulated normal male with (99m)Tc-sestamibi distribution using digital XCAT phantom with respiratory motion amplitudes of 2, 3, and 4 cm...
December 20, 2016: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/27998302/immunoglobulin-g4-related-constrictive-pericarditis-identified-by-cytological-examination-of-pericardial-effusion-a-case-report
#20
Kazunori Horie, Norio Tada, Keiichirou Yamaguchi, Keitarou Inazawa, Mareyuki Endo, Naoto Inoue
BACKGROUND: Immunoglobulin G4-related disease is increasingly recognized as a systemic autoimmune disorder characterized by immunoglobulin G4-positive lymphocyte infiltration. Organ biopsy and histopathology are the most important diagnostic methods; however, the significance of a cytological examination in immunoglobulin G4-related disease cases is still unclear. CASE PRESENTATION: A 73-year-old Asian man who was a former tobacco smoker presented with progressive exertional dyspnea, systemic edema, and pericardial effusion...
December 20, 2016: Journal of Medical Case Reports
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