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Crane Judy L JL Minnesota Pollution Control Agency, St. Paul, MN, - - 2014
Recently, O'Reilly et al. (2014) provided a review of environmental forensic techniques for source characterization and identification of pyrogenic polycyclic aromatic hydrocarbons (PAHs) in sediments. They also provided an example case study pertaining to refined tar-based sealers [commonly known as coal tar-based sealants (CT-sealants)] to support their contention that CT-sealants ...
Mahler Barbara J BJ U.S. Geological Survey, 1505 Ferguson Lane, Austin, TX 78754, USA. Electronic address: - - 2014
Coal-tar-based sealcoat, used extensively on parking lots and driveways in North America, is a potent source of PAHs. We investigated how concentrations and assemblages of PAHs and azaarenes in runoff from pavement newly sealed with coal-tar-based (CT) or asphalt-based (AS) sealcoat changed over time. Samples of simulated runoff were collected ...
Meijs M F L - - 2012
The haemodynamic effect of a coronary artery stenosis is a better predictor of prognosis than anatomical lumen obstruction. Until recently, no individual non-invasive test could provide both accurate coronary anatomy and lesion-specific myocardial ischaemia. However, computer tomography (CT) fractional flow reserve, which can be calculated from a standard CT coronary ...
Beinart Roy - - 2012
The use of magnetic resonance imaging (MRI) as a diagnostic technique is rapidly expanding. The number of patients who undergo implantation of permanent pacemaker, implantable cardioverter defibrillator (ICD), and/or cardiac resynchronization therapy devices is increasing in parallel. Cardiovascular implants are subject to potentially harmful effects from MRI, and the routine ...
Sato Miki - - 2012
We present a case of uterine synechia diagnosed by conventional 2-D color Doppler, 3-D sonography, and magnetic resonance imaging at 26 weeks' gestation. 3-D sonography clearly revealed umbilical cord prolapse through an oblique transverse uterine synechia. Loops of the umbilical cord were below and the fetus was superior to the uterine ...
So Aaron - - 2012
Dual-energy computed tomography (DECT) has recently been introduced for clinical use. One potential application of DECT is myocardial perfusion imaging through the significant reduction of beam-hardening artifacts by using monochromatic image reconstruction; analysis of these images can improve the accuracy of quantitative measurement of myocardial perfusion. Single-source DECT enabled by ...
Tsang Wendy - - 2012
To determine the accuracy of calcium-containing rings measurements imaged by three-dimensional echocardiography (3DE), multi-slice CT (MSCT) and cardiac magnetic resonance (CMR) under ideal conditions against the true ring dimensions. To compare the accuracy of aortic annulus (AoA) measurements in ex vivo human hearts using 3DE, MSCT and CMR. To determine ...
Ratnayaka Kanishka K Division of Intramural Research, Cardiovascular and Pulmonary Branch, National Heart Lung and Blood Institute, National Institutes of Health, Building 10, Room 2c713, MSC 1538, Bethesda, MD 20892-1538, - - 2013
Real-time MRI creates images with superb tissue contrast that may enable radiation-free catheterization. Simple procedures are the first step towards novel interventional procedures. We aim to perform comprehensive transfemoral diagnostic right heart catheterization in an unselected cohort of patients entirely using MRI guidance. We performed X-ray and MRI-guided transfemoral right ...
Abel Elodie - - 2012
BackgroundRight ventricular function predicts outcome in patients with pulmonary hypertension (PH). Therefore accurate assessment of right ventricular function is essential to graduate severity, assess follow-up, and response to therapy.PurposeTo evaluate whether PH severity could be assessed using electrocardiography-gated CT (ECG-gated CT) functional parameters. A further objective was to evaluate cardiac ...
Laible M - - 2012
To assess the prevalence of cardiovascular findings in asymptomatic individuals by means of 1.5-T whole-body magnetic resonance imaging and angiography. A cohort of 138 individuals (118 men, 20 women) with a mean age of 54 years (SD ± 7.55) was referred to whole-body MRI at 1.5-T, including contrast-enhanced whole-body MR angiography (MRA) ...
Chen Limin - - 2012
OBJECTIVE: Hypoxia is an important negative prognostic factor for radiation treatment of head and neck (H&N) cancer. The focus of this study was to evaluate the feasibility of F-HX4 (3-[F]fluoro-2-(4-((2-nitro-1H-imidazol-1-yl)methyl)-1H-1,2,3,-triazol-1-yl)-propan-1-ol) on hypoxia imaging compared with F-fluoromisonidazole (F-FMISO) mainly in human H&N cancer. METHODS: F-HX4 precursor, standards, and methods were provided ...
Pang Li-Fang - - 2012
OBJECTIVES: To evaluate the capability of spectral CT imaging to detect the different stages and angiogenesis of myocardial infarction (MI). METHODS: MI was surgically induced in 40 rabbits that were evenly divided into four stages of MI: 6 h (6H), 3 days (3D), 7 days (7D) and 14 days (14D). ...
Chaturvedi Abhishek - - 2012
Congenital or acquired communication between left ventricle and right atrium is rare and can be easily overlooked as an eccentric tricuspid regurgitation jet. MRI is the ideal modality for accurate diagnosis, providing details for surgical planning about the location and size of the defect.
Duarte Ricardo - - 2012
Diastolic dysfunction is a common entity and the predominant cause of heart failure in 40%-50% of patients. Diagnosis of diastolic dysfunction is clinically relevant and is associated with a poor prognosis. The aim of this essay was to review the pathophysiology and different grades of diastolic dysfunction and to provide ...
Aguor Eissa N E - - 2012
Myocardial edema can arise in several disease states. MRI contrast agent can accumulate in edematous tissue, which complicates differential diagnosis with contrast-enhanced (CE)-MRI and might lead to overestimation of infarct size. Sodium Chemical Shift Imaging ((23)Na-CSI) may provide an alternative for edema imaging. We have developed a non-infarct, isolated rat ...
Birkemeyer Ralf - - 2012
AIMS: Cardiogoniometry (CGM) is a spatio-temporal five-lead resting electrocardiographic method utilizing automated analysis. The purpose of this study was to determine CGM's and electrocardiography (ECG)'s accuracy for detecting myocardial ischaemia and/or lesions in comparison with perfusion cardiac magnetic resonance imaging (CMRI) and late gadolinium enhancement (LGE).METHODS AND RESULTS: Forty (n= ...
Nassenstein Kai - - 2012
OBJECTIVES: To assess the diagnostic accuracy of phonocardiogram (PCG) gated velocity-encoded phase contrast magnetic resonance imaging (MRI). METHODS: Flow quantification above the aortic valve was performed in 68 patients by acquiring a retrospectively PCG- and a retrospectively ECG-gated velocity-encoded GE-sequence at 1.5 T. Peak velocity (PV), average velocity (AV), forward volume ...
Nacif Marcelo Souto - - 2012
To develop a cardiac computed tomographic (CT) method with which to determine extracellular volume (ECV) fraction, with cardiac magnetic resonance (MR) imaging as the reference standard. Study participants provided written informed consent to participate in this institutional review board-approved study. ECV was measured in healthy subjects and patients with heart ...
Shah Sanket S - - 2012
Knowledge of the anatomy of the coronary sinus (CS) and cardiac venous drainage is important because of its relevance in electrophysiologic procedures and cardiac surgeries. Several procedures make use of the CS, such as left ventricular pacing, mapping and ablation of arrhythmias, retrograde cardioplegia, targeted drug delivery, and stem cell ...
Ambrosi Christina M - - 2012
The atrial pacemaker complex is responsible for the initiation and early propagation of cardiac impulses. Optical coherence tomography (OCT), a nondestructive imaging modality with spatial resolutions of ∼1 to 15 μm, can be used to identify unique fiber orientation patterns in this region of the heart. Functionally characterized canine sinoatrial ...
Paksoy Yahya - - 2012
PURPOSE: here are two well-known indications for first-pass perfusion in the literature. First is the evaluation of myocardial ischemia, and the other is the evaluation of tumor vascularity. Our aim was to assess the value of a first-pass contrast bolus tracking sequence (FPCBTS) for cases unrelated to these pathologies. MATERIALS ...
Ghann William E - - 2012
Lisinopril was used as the targeting moiety to prepare gold nanoparticle-based functional CT contrast agents. Pure lisinopril, thioctic acid-lisinopril conjugate and reduced thioctic acid-lisinopril conjugate were used to obtain GNP-Lis, GNP-TA-Lis and GNP-RTA-Lis, respectively, via ligand exchange reaction on citrate-coated gold nanoparticles (GNPs). These lisinopril-decorated GNPs were fully characterized and ...
Almeida Carla - - 2012
Coronary artery anomalies (CAAs) are a rare entity but their true incidence in the general population has yet to be determined. Most CAAs are asymptomatic, but they are nevertheless the second leading cause of sudden death in apparently healthy young athletes. The new imaging methods available to cardiologists, including CT ...
Goldman Mark - - 2012
A 73-year-old woman presented in right heart failure. Computed tomography of the chest revealed a 3 cm × 5 cm anterior mediastinal mass. Contrast-enhanced two-dimensional transthoracic echocardiography, cardiac magnetic resonance imaging (MRI), positron emission tomography (PET), and MRI-PET fusion demonstrated invasion of the pericardium and right heart by the tumor. ...
Chu Linda C - - 2012
Recent innovations in multidetector 3D CT have improved the spatial and temporal resolution of cardiac computed tomography (CT), which results in greater frequency of mass lesion identification and provides a new opportunity for more precise characterization. Although cardiac masses are rare entities, patients with cardiac masses may present with acute ...
Tran Ly-Binh-An - - 2012
BACKGROUND AND PURPOSE: (18)F-FAZA is a nitroimidazole PET tracer that can provide images of tumor hypoxia. However, it cannot provide absolute pO(2) values. To qualify (18)F-FAZA PET, we compared PET images to pO(2) measured by OxyLite, EPR oximetry and (19)F-MRI. MATERIALS AND METHODS: Male WAG/Rij rats grafted with rhabdomyosarcoma were ...
Manabe Osamu - - 2012
ABSTRACT: We report 2 rare cases of primary cardiac paraganglioma demonstrated with multimodality imaging. Both a 46-year-old woman who presented with hypertension (case 1) and a 46-year-old woman without any symptoms (case 2) had mediastinal tumors depicted by CT and MRI. Both cases showed intense focal uptakes in the tumors ...
Kanal E - - 2012
It has now been almost 3 decades since the introduction of MRI as a vital component of our clinical diagnostic armamentarium. During that time, we have learned much about the potential safety concerns relating to the static and time varying electromagnetic fields used in the MR imaging process, as well ...
Sommer Gregor - - 2012
Noninvasive imaging provides important information on cardiac anatomy and function and is a key element in clinical management of valvular heart disease (VHD). Beside echocardiography, which is still considered the first-line modality for assessment of valvular anatomy and longitudinal evaluation of VHD, cardiovascular magnetic resonance (CMR) has evolved during the ...
Joyner D - - 2012
Purpose: To examine schemes to grade the severity of metal susceptibility artifacts on image quality using cardiac MRI pulse sequences. Methods: A post-thoracotomy patient was simulated with a stainless steel sternal wire (Syneture,MA; size=6, diameter=48mm), placed securely on an ACR MRI phantom. Phantom was scanned on a 1.5-T Siemens using ...
Wallis Adam - - 2012
The role of cardiac computed tomography (CT) in the assessment and management of patients with suspected cardiac chest pain has been formally recognised in NICE guidance 95. When the technique and patient selection are appropriate, cardiac CT is a valuable diagnostic tool, particularly for patients with a low to intermediate ...
Ghafourian Kambiz - - 2012
The study evaluated the relationship between cardiac computed tomography (CT) scout view x-ray attenuation and CT image noise compared with weight or body mass index (BMI). Decreasing peak tube voltage from 120 to 100 kVp on the basis of body size reduces radiation exposure. Methods to better predict CT image ...
Jiang X-D - - 2012
Objective To observe the dynamic changes of blood perfusion and hypoxic status with CT perfusion imaging and hypoxia imaging in patients of non-small-cell lung cancer (NSCLC) who were treated with recombinant human endostatin (RHES). Methods Fifteen previously untreated patients with histologically or cytologically confirmed NSCLC were enrolled. They were randomly ...
Chung Jin Woo - - 2012
A 55-year-old woman who had a history of percutaneous vertebroplasty was referred to our institution with sudden onset of chest pain. Computed tomography (CT) scan demonstrated a long, linear, highly-attenuated segment in the right side of the heart and fragmented pieces in the right pulmonary artery. The CT scan and ...
Ferencik Maros - - 2012
Cardiac allograft vasculopathy (CAV) is the main cause of morbidity and mortality beyond 1 year after heart transplantation. Ischemic symptoms are usually not present because of the denervated allograft and diffuse nature of the disease. Patients present with heart failure, ventricular arrhythmia, or sudden cardiac death as a result of ...
Dahiya Arun - - 2012
Current guidelines recommend a multiparametric echocardiographic assessment of aortic regurgitation (AR). However, the absence of a hierarchical weighting of discordant parameters could cause interobserver variability. In the present study, we sought to define and improve the interobserver variability of AR assessment. Seventeen level 3 readers graded 20 randomly selected patients ...
Fernandes Andre Mauricio S - - 2012
A 62-year-old woman with mitral regurgitation (MR) underwent cardiac magnetic resonance (CMR) and dobutamine stress CMR imaging, a widely used method to analyze left ventricular function and MR volumes. During dobutamine provocation at escalating doses, the left ventricular end-diastolic diameter (LVEDD) decreased, with a corresponding decrease in MR. At peak ...
Lazeyras Francois F University Hospitals of Geneva, Geneva, Switzerland. - - 2012
To demonstrate that adenosine triphosphate (ATP), which provides a valuable biomarker for kidney viability in the context of donation after cardiac death (DCD) transplantation, can be detected by means of (31)P magnetic resonance spectroscopy (MRS) if kidneys are perfused with oxygenated hypothermic pulsatile perfusion (O(2)+HPP). Porcine kidney perfusion was carried ...
Yokokawa Miki - - 2012
Cardiac magnetic resonance imaging (MRI) has a central role in the management of patients with ventricular arrhythmias. Cardiac MRIs help to identify patients with risk for life-threatening arrhythmias. Delayed enhancement identifies scar tissue within the heart. Because scar harbors the arrhythmic substrate in patients with structural heart disease, areas of ...
Brisville Anne-Claire - - 2012
A right atrial mass was observed by ultrasound in a 3-month-old red Holstein calf. Differential diagnoses included endocarditis or tumor. Due to the poor prognosis, the calf was euthanized. On gross examination, there was a marked dilation of the right atrium. A round, poorly delineated, 2 cm mass was visualized in ...
Yamada Minoru - - 2012
Background: Investigate the effectiveness of beam-hardening (BH) correction using ECG-gated dual-kVp computed tomography (CT) for myocardial imaging. Methods and Results: A human heart specimen and artificial descending aorta were scanned using both dual-kVp and single 120-kVp modes. The myocardial CT values at the anterior and posterobasal walls were 89.4±6.2 and ...
Votino C - - 2012
Objectives: To compare the diagnostic usefulness of High-field with Low-field MRI and stereo-microscopic autopsy for the examination of fetal hearts in fetuses at or under 20 weeks of gestation. Methods: Informed consent was obtained for this ethics committee approved study. Prior to invasive stereo-microscopic autopsy, MRI scans at 9.4 T, ...
Simon-Yarza Isabel - - 2012
BackgroundEpicardial adipose tissue (EAT) is an important indicator of cardiovascular risk. This parameter is generally assessed on ECG-gated computed tomography (CT) images.PurposeTo evaluate feasibility and reliability of EAT quantification on non-gated thoracic low-radiation-dose CT examinations with respect to prospectively ECG-gated cardiac CT acquisition.Material and MethodsSixty consecutive asymptomatic smokers (47 men; ...
Rajaram Smitha S Unit of Academic Radiology, University of Sheffield, Sheffield, UK. - - 2012
Pulmonary arterial hypertension (PAH) is a life-threatening complication of connective tissue diseases (CTD). Our aim was to compare the diagnostic utility of noninvasive imaging modalities, i.e., magnetic resonance imaging (MRI), computed tomography (CT), and echocardiography, in evaluation of these patients. In total, 81 consecutive patients with CTD and suspected PH ...
Rahbar Kambiz - - 2012
In the diagnostic algorithm of cardiac tumors, the noninvasive determination of malignancy and metastatic spread is of major interest to stratify patients and to select and monitor therapies. In the diagnostic work-up, morphologic imaging modalities such as echocardiography or magnetic resonance tomography offer information on, for example, size, invasiveness, and ...
Mirjalili S Ali - - 2012
Accurate surface anatomy is essential for safe clinical practice. Numerous inconsistencies in clinically important surface markings exist between and within anatomical reference texts. The aim of this study was to investigate key thoracic surface anatomical landmarks in vivo using computed tomographic (CT) imaging. High-resolution thoracic CT scans from 153 supine ...
James Susan H - - 2012
OBJECTIVE: The left ventricle (LV) is routinely assessed with cardiac magnetic resonance imaging (MRI) by using short-axis orientation; it remains unclear whether the right ventricle (RV) can also be adequately assessed in this orientation or whether dedicated axial orientation is required. We used phase-contrast (PC) flow measurements in the main ...
Flosdorff Patrick - - 2012
A 14-year-old boy with a heart murmur was referred to the authors' department because structural heart disease could not be ruled out by standard echocardiographic views. The best apical four-chamber view was obtained with the patient turned to a right lateral decubitus position and the transducer shifted almost to the ...
Greer David - - 2012
BACKGROUND: In clinical practice, magnetic resonance imaging (MRI) is commonly used to assess the severity of a cardiac arrest patient's cerebral injury, utilizing treating neurologists' imaging interpretation. We sought to determine whether clinical interpretation of diffusion-weighted imaging (DWI) helps to determine poor outcome in comatose cardiac arrest patients. METHODS: We ...
Jaarsma Caroline C Department of Cardiology, Maastricht University Medical Center, Maastricht, the - - 2012
This study aimed to determine the diagnostic accuracy of the 3 most commonly used noninvasive myocardial perfusion imaging modalities, single-photon emission computed tomography (SPECT), cardiac magnetic resonance (CMR), and positron emission tomography (PET) perfusion imaging for the diagnosis of obstructive coronary artery disease (CAD). Additionally, the effect of test and ...
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