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Magnetic resonance imaging

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https://www.readbyqxmd.com/read/28735291/subclinical-atherosclerosis-cardiac-and-kidney-function-heart-failure-and-dementia-in-the-very-elderly
#1
Lewis H Kuller, Oscar L Lopez, John S Gottdiener, Dalane W Kitzman, James T Becker, Yuefang Chang, Anne B Newman
BACKGROUND: Heart failure (HF) and dementia are major causes of disability and death among older individuals. Risk factors and biomarkers of HF may be determinants of dementia in the elderly. We evaluated the relationship between biomarkers of cardiovascular disease and HF and risk of dementia and death. Three hypotheses were tested: (1) higher levels of high-sensitivity cardiac troponin T, N-terminal of prohormone brain natriuretic peptide, and cystatin C predict risk of death, cardiovascular disease, HF, and dementia; (2) higher levels of cardiovascular disease biomarkers are associated with increased risk of HF and then secondary increased risk of dementia; and (3) risk of dementia is lower among participants with a combination of lower coronary artery calcium, atherosclerosis, and lower high-sensitivity cardiac troponin T (myocardial injury)...
July 22, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28735215/estimation-of-individual-axon-bundle-properties-by-a-multi-resolution-discrete-search-method
#2
Ricardo Coronado-Leija, Alonso Ramirez-Manzanares, Jose Luis Marroquin
A stable, accurate and robust-to-noise method for the estimation of the intra-voxel bundle-wise diffusion properties for diffusion-weighted magnetic resonance imaging is presented. The proposed method overcomes some of the limitations of most of the multi-fiber algorithms in the literature and extends them to estimate the diffusion profiles, improving the estimation of the intra-voxel geometry at challenging microstructure configurations, that is to say: relatively small crossing angles, different voxel-wise anisotropic diffusion profiles and low SNR...
June 29, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28735169/aberrant-link-between-empathy-and-social-attribution-style-in-borderline-personality-disorder
#3
Philipp Homan, Marianne C Reddan, Tobias Brosch, Harold W Koenigsberg, Daniela Schiller
In social interactions, we often need to quickly infer why other people do what they do. More often than not, we infer that behavior is a result of personality rather than circumstances. It is unclear how the tendency itself may contribute to psychopathology and interpersonal dysfunction. Borderline personality disorder (BPD) is characterized by severe interpersonal dysfunction. Here, we investigated if this dysfunction is related to the tendency to over-attribute behaviors to personality traits. Healthy controls and patients with BPD judged positive and negative behaviors presented within a situational constraint during functional magnetic resonance imaging...
July 14, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28735141/seizure-outcome-of-patients-with-magnetic-resonance-imaging-negative-epilepsies-still-an-ongoing-debate
#4
Cihan Isler, Cigdem Ozkara, Baris Kucukyuruk, Sakir Delil, Buge Oz, Nil Comunoglu, Osman Kizilkilic, Ahmet Kayhan, Kaancan Deniz, Serdar Akkol, Taner Tanriverdi, Mustafa Uzan
No abstract text is available yet for this article.
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28735133/neurological-outcome-after-resection-of-parietal-lobe-including-primary-somatosensory-cortex-implications-of-additional-resection-of-posterior-parietal-cortex
#5
Young-Hoon Kim, June Sic Kim, Sang Kun Lee, Chun Kee Chung
OBJECTIVE: Postoperative neurological outcomes after primary somatosensory cortex (S1) resection have not been well-documented. This study was designed to evaluate the neurological deterioration that follows resection of the S1 areas and to assess the risk factors associated with these morbidities. METHODS: We reviewed 48 consecutive patients who suffered from medically intractable epilepsy and underwent resection of the S1 and/or the adjacent cortex. The 48 patients were categorized into 4 groups according to the resected area as seen on postoperative magnetic resonance images: Group 1 (resection of S1 only; n=4), 2 (the posterior parietal cortex (PPC) only; n=24), 3 (S1 and PPC; n=10), and 4 (S1 and precentral gyrus; n=10)...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28735122/ventral-lumbar-synovial-cyst-causing-cauda-equina-compression-case-report-and-literature-review
#6
Anan Shtaya, Ahmed-Ramadan Sadek, Mark Walker, Ali Nader-Sepahi
BACKGROUND: Juxtafacet spinal cysts are cystic synovial lesions that are often indistinguishable clinically or radiologically and require histopathology analysis to confirm the diagnosis. Lumbar synovial cysts usually arising from the synovium of the facet joints. They have been described posterolateral or rarely in the posterior midline. However, we describe the first synovial cyst ventral to the dural sac. CASE DESCRIPTION: We report a lumbar 3-4 lesion causing cauda equina compression in a 57-year-old man who presented with 3 months history of low back pain and bilateral sciatica, intermittent urinary incontinence and erectile dysfunction...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28735078/revisiting-the-role-of-the-insula-and-smoking-cue-reactivity-in-relapse-a-replication-and-extension-of-neuroimaging-findings
#7
A C Janes, J M Gilman, M Radoman, G Pachas, M Fava, A E Evins
INTRODUCTION: The ability to direct smoking cessation treatment based on neuroscientific findings holds incredible promise. However, there is a strong need for consistency across studies to confirm neurobiological targets. While our prior work implicated enhanced insula reactivity to smoking cues in tobacco smoking relapse vulnerability, this finding has not been confirmed. METHOD: Using functional magnetic resonance imaging (fMRI), we evaluated the pre-cessation brain reactivity to smoking vs...
July 12, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28734955/predicting-the-nodal-status-in-gastric-cancers-the-role-of-apparent-diffusion-coefficient-histogram-characteristic-analysis
#8
Song Liu, Yujuan Zhang, Jie Xia, Ling Chen, Wenxian Guan, Yue Guan, Yun Ge, Jian He, Zhengyang Zhou
PURPOSE: To explore the application of histogram analysis in preoperative T and N staging of gastric cancers, with a focus on characteristic parameters of apparent diffusion coefficient (ADC) maps. MATERIALS AND METHODS: Eighty-seven patients with gastric cancers underwent diffusion weighted magnetic resonance imaging (b=0, 1000s/mm(2)), which generated ADC maps. Whole-volume histogram analysis was performed on ADC maps and 7 characteristic parameters were obtained...
July 19, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28734954/sparse-mri-reconstruction-using-multi-contrast-image-guided-graph-representation
#9
Zongying Lai, Xiaobo Qu, Hengfa Lu, Xi Peng, Di Guo, Yu Yang, Gang Guo, Zhong Chen
Accelerating the imaging speed without sacrificing image structures plays an important role in magnetic resonance imaging. Under-sampling the k-space data and reconstructing the image with sparsity constraint is one efficient way to reduce the data acquisition time. However, achieving high acceleration factor is challenging since image structures may be lost or blurred when the acquired information is not sufficient. Therefore, incorporating extra knowledge to improve image reconstruction is expected for highly accelerated imaging...
July 19, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28734928/lv-mass-independently-predicts-mortality-and-need-for-future-revascularization-in%C3%A2-patients-undergoing-diagnostic-coronary-angiography
#10
Ahmed Abdi-Ali, Robert J H Miller, Danielle Southern, Mei Zhang, Yoko Mikami, Merril Knudtson, Bobak Heydari, Andrew G Howarth, Carmen P Lydell, Mathew T James, Stephen B Wilton, James A White
OBJECTIVES: The goal of this study was to assess associations between left ventricular (LV) mass, all-cause mortality, and need for revascularization in patients undergoing coronary angiography. BACKGROUND: LV hypertrophy is associated with adverse cardiovascular outcomes in healthy subjects. However, its influence in those with known or suspected coronary artery disease is poorly understood. METHODS: A total of 3,754 patients (mean age 59...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28734900/molecular-imaging-in-stem-cell-based-therapies-of-cardiac-diseases
#11
REVIEW
Xiang Li, Marcus Hacker
In the past 15years, despite regenerative medicine has shown great potential for cardiovascular diseases, the outcome and safety of stem cell transplantation has shown controversial results in the published literature. Medical imaging might be useful for monitoring and quantification transplanted cells within the heart and to serially characterize the effects of stem cell therapy of the myocardium. From the multiple available noninvasive imaging techniques, magnetic resonance imaging and nuclear imaging by positron (PET) or single photon emission computer tomography (SPECT) are the most used clinical approaches to follow the fate of transplanted stem cells in vivo...
July 19, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28734679/assessment-of-biodistribution-using-mesenchymal-stromal-cells-algorithm-for-study-design-and-challenges-in-detection-methodologies
#12
Blanca Reyes, Maria Isabel Coca, Margarita Codinach, María Dolores López-Lucas, Anna Del Mazo-Barbara, Marta Caminal, Irene Oliver-Vila, Valentín Cabañas, Silvia Lope-Piedrafita, Joan García-López, José M Moraleda, Cesar G Fontecha, Joaquim Vives
BACKGROUND AIMS: Biodistribution of candidate cell-based therapeutics is a critical safety concern that must be addressed in the preclinical development program. We aimed to design a decision tree based on a series of studies included in actual dossiers approved by competent regulatory authorities, noting that the design, execution and interpretation of pharmacokinetics studies using this type of therapy is not straightforward and presents a challenge for both developers and regulators...
July 19, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28734657/exercise-performance-and-22q11-2-deletion-status-affect-quality-of-life-in-tetralogy-of-fallot
#13
Elizabeth Goldmuntz, Amy Cassedy, Laura Mercer-Rosa, Mark A Fogel, Stephen M Paridon, Bradley S Marino
OBJECTIVE: To identify mediators of health status and quality of life (QOL) in children and adolescents aged 8-18 years old following surgical repair for tetralogy of Fallot (TOF), including resource use, exercise performance, and 22q11.2 deletion status. STUDY DESIGN: We performed a corollary study to a cross-sectional analysis of subjects following repair for TOF that completed cardiac magnetic resonance imaging, cardiopulmonary exercise tests, and instruments assessing health status and QOL...
July 19, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28734538/accuracy-of-infraspinatus-isometric-testing-in-predicting-tear-size-and-tendon-reparability-comparison-with-imaging-and-arthroscopy
#14
Helen Razmjou, Monique Christakis, Tim Dwyer, Varda van Osnabrugge, Richard Holtby
BACKGROUND: The purpose of this study was to examine the accuracy of external rotation in neutral (0° external position) and in shortened position (45° external position) in relation to rotator cuff tear size, tendon reparability, and other clinical, surgical, and imaging findings. METHODS: This was a prospective blinded diagnostic study of consecutive surgical candidates for rotator cuff repair using magnetic resonance imaging and arthroscopic surgery as the "gold standards...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734535/transcatheter-arterial-embolization-of-abnormal-vessels-as-a-treatment-for-lateral-epicondylitis-refractory-to-conservative-treatment-a-pilot-study-with-a-2-year-follow-up
#15
Wataru Iwamoto, Yuji Okuno, Noboru Matsumura, Takao Kaneko, Hiroyasu Ikegami
BACKGROUND: Abnormal vessels and accompanying nerves are possible sources of pain with lateral epicondylitis. The purpose of this study was to describe the safety and efficacy of transcatheter arterial embolization (TAE) for lateral epicondylitis resistant to conservative treatment. METHODS: This prospective study was conducted in 24 patients with lateral epicondylitis resistant to conservative treatments for more than 3 months, with a symptom duration longer than 6 months, and with moderate to severe pain who were treated with TAE between March 2013 and October 2014...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734460/affected-anatomical-rich-club-and-structural-functional-coupling-in-young-offspring-of-schizophrenia-and-bipolar-disorder-patients
#16
Guusje Collin, Lianne H Scholtens, René S Kahn, Manon H J Hillegers, Martijn P van den Heuvel
BACKGROUND: Emerging evidence suggests disruptions in the wiring organization of the brain's network in schizophrenia (SZ) and bipolar disorder (BD). As the importance of genetic predisposition has been firmly established in these illnesses, children (offspring) of patients constitute an at-risk population. This study examines connectome organization in children at familial high risk for psychosis. METHODS: Diffusion-weighted magnetic resonance imaging scans were collected from 127 nonpsychotic offspring 8 to 18 years of age (average age = 13...
June 21, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28734451/computed-tomography-better-than-magnetic-resonance-imaging-for-resternotomy-risk-assessment
#17
Anirudh Vinnakota, Robert Stewart, Gosta Pettersson
No abstract text is available yet for this article.
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28734444/systemic-artery-to-pulmonary-vein-fistula-after-right-upper-lobectomy-demonstrated-by-4-dimensional-flow-magnetic-resonance-imaging
#18
Antoine Legras, Arshid Azarine, Bastien Poitier, Emmanuel Messas, Françoise Le Pimpec-Barthes
Postoperative systemic artery to pulmonary vein fistula is very rare. In this report, we describe an exceptional condition of both intrapulmonary arteriovenous fistula and systemic artery to pulmonary vein fistula, involving all right hemithoracic systemic arteries, inducing left-to-left shunt. This condition was responsible for heart failure, 24 years after a right upper lobectomy for inflammatory tumor. Investigations included computed tomographic angiography, arteriography, and four-dimensional flow magnetic resonance imaging...
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28734177/manual-morphometry-of-hippocampus-and-amygdala-in-adults-with-attention-deficit-hyperactivity-disorder
#19
Kathrin Nickel, Ludger Tebartz van Elst, Evgeniy Perlov, Renate Jitten-Schachenmeier, Daniel Beier, Dominique Endres, Peter Goll, Alexandra Philipsen, Simon Maier
Previous studies have pointed to the involvement of limbic structures in the genesis of attention deficit hyperactivity disorder (ADHD). The present researchers manually segmented magnetic resonance images of 30 individuals with ADHD and 30 individually matched controls, focusing on amygdala and hippocampus volumes. Neither hippocampus nor amygdala volume differed significantly between individuals with and without ADHD. However, ADHD patients with higher hyperactivity scores had significantly smaller left amygdala volumes...
July 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28734146/diagnostic-value-of-whole-body-diffusion-weighted-mri-compared-to-computed-tomography-for-pre-operative-assessment-of-patients-suspected-for-ovarian-cancer
#20
Katrijn Michielsen, Raphaëla Dresen, Ragna Vanslembrouck, Frederik De Keyzer, Frédéric Amant, Elvier Mussen, Karin Leunen, Patrick Berteloot, Philippe Moerman, Ignace Vergote, Vincent Vandecaveye
BACKGROUND: Despite excellent per-lesion performance for peritoneal staging, the additional clinical value of diffusion-weighted magnetic resonance imaging (DWI/MRI) compared to computed tomography (CT) remains to be established in ovarian cancer. Our purpose was to evaluate whole body (WB)-DWI/MRI for diagnosis, staging and operability assessment of patients suspected for ovarian cancer compared to CT. METHODS: One hundred and sixty-one patients suspected for ovarian carcinoma underwent 3 T WB-DWI/MRI and contrast-enhanced CT...
July 19, 2017: European Journal of Cancer
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