586,613 results match your criteria resonance imaging


Duplicated Middle Cerebral Artery Aneurysms Treated by Coil Embolization; A Report of Two Cases and Literature Review.

J Stroke Cerebrovasc Dis 2021 Apr 14;30(7):105773. Epub 2021 Apr 14.

Department of Neurosurgery, Nara Medical University, Kashihara, Japan. Electronic address:

Background: Duplication of the middle cerebral artery (DMCA) is an anomalous vessel arising from the internal carotid artery (ICA). Aneurysms at the origin of a DMCA have been reported; however, most have been treated with clipping surgery. Here, we describe two cases of aneurysms at the origin of a DMCA treated with coil embolization. Read More

View Article and Full-Text PDF

Invasive urothelial carcinoma of urinary bladder presenting with annular constriction and mimicking proctitis observed by colonoscopy: A case report.

Int J Surg Case Rep 2021 Mar 16;82:105785. Epub 2021 Mar 16.

Division of Colon and Rectal Surgery, Department of Surgery, Tri-Service General Hospital, No. 325, Sec. 2, Chenggong Rd., Neihu District, Taipei City, 11490, Taiwan, ROC.

Introduction: Bladder urothelial carcinoma rarely spreads to the gastrointestinal tract, and its presentation in the rectum varies. We report a case of a patient who presented with an annular constriction of the rectum.

Presentation Of Case: A 60-year-old man was referred to our hospital with chief complaints of anal stricture and partial obstruction for about 1 month. Read More

View Article and Full-Text PDF

Characteristics of clinically node negative breast cancer patients needing preoperative MRI.

Surg Oncol 2021 Mar 31;38:101552. Epub 2021 Mar 31.

Department of Oncology, Turku University Hospital, Finland; University of Turku, Turku, Finland; Finnish Nuclear and Radiation Safety, Helsinki, Finland.

Background: International guidelines do not recommend magnetic resonance imaging (MRI) for all breast cancer patients at primary diagnostics. This study aimed to understand which patient or tumor characteristics are associated with the use of MRI. The role of MRI among other preoperative imaging methods in clinically node negative breast cancer was studied. Read More

View Article and Full-Text PDF

Preserved cholinergic forebrain integrity reduces structural connectome vulnerability in mild cognitive impairment.

J Neurol Sci 2021 Apr 9;425:117443. Epub 2021 Apr 9.

Department of Psychology, Manchester Metropolitan University, 53 Bonsall St, Manchester M15 6GX, UK.

Neurodegeneration leads to redistribution of processing, which is reflected in a reorganisation of the structural connectome. This might affect its vulnerability to structural damage. Cortical acetylcholine allows favourable adaptation to pathology within the memory circuit. Read More

View Article and Full-Text PDF

Improved outcome prediction of oropharyngeal cancer by combining clinical and MRI features in machine learning models.

Eur J Radiol 2021 Apr 8;139:109701. Epub 2021 Apr 8.

Department of Radiology, The Netherlands Cancer Institute, Amsterdam, the Netherlands; Department of Radiology, Amsterdam University Medical Center, Amsterdam, the Netherlands.

Objectives: New markers are required to predict chemoradiation response in oropharyngeal squamous cell carcinoma (OPSCC) patients. This study evaluated the ability of magnetic resonance (MR) radiomics to predict locoregional control (LRC) and overall survival (OS) after chemoradiation and aimed to determine whether this has added value to traditional clinical outcome predictors.

Methods: 177 OPSCC patients were eligible for this study. Read More

View Article and Full-Text PDF

Psychotic symptoms in drug resistant epilepsy patients after cortical stimulation.

Epilepsy Res 2021 Apr 2;173:106630. Epub 2021 Apr 2.

Epilepsy Program, Neurology Department, Hospital Clinic of Barcelona, Barcelona, 08036, Spain; Clinical Institute of Neurosciences, Hospital Clinic of Barcelona, Barcelona, 08036, Spain; Biomedical Research Institute August Pi i Sunyer (IDIBAPS), Hospital Clinic of Barcelona, Barcelona, 08036, Spain.

Purpose: The use of invasive EEG (iEEG) recordings before epilepsy surgery has increased as more complex focal epilepsies are evaluated. Psychotic symptoms (PS) during iEEG have been scarcely reviewed. We aim to report our series of patients with psychotic symptoms (PS) brought about by cortical stimulation (CS) and to identify triggers. Read More

View Article and Full-Text PDF

Implementation of a Magnetic Resonance Imaging scanner dedicated to emergencies in cases of binocular diplopia: impact on patient management.

J Neuroradiol 2021 Apr 14. Epub 2021 Apr 14.

Service des Urgences, Hôpitaux Universitaires de Strasbourg, 1, Place de l'Hôpital, 67000 Strasbourg, France. Electronic address:

Rationale And Objectives: Evaluate the implementation of an MRI scanner dedicated to emergencies on the management of patients admitted in the emergency department (ED) for binocular diplopia (BD).

Material And Methods: This was a prospective non-interventional single-center study from February 2018 to February 2020. A total of 110 patients were included: 52 patients during the first stage (29 women; 23 men; mean age 65. Read More

View Article and Full-Text PDF

Myocardial Perfusion and Viability imaging in Coronary Artery Disease: Clinical Value in Diagnosis, Prognosis and Therapeutic Guidance.

Am J Med 2021 Apr 14. Epub 2021 Apr 14.

Division of Cardiovascular Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee. Electronic address:

Coronary artery disease is a leading cause of morbidity and mortality worldwide. Non-invasive imaging tests play a significant role in diagnosing coronary artery disease, as well as risk stratification and guidance for revascularization. Myocardial perfusion imaging, including single photon emission computed tomography and positron emission tomography, has been widely employed. Read More

View Article and Full-Text PDF

Assessment of the genetic contribution to brain MRI lesion load and atrophy measures in multiple sclerosis patients.

Eur J Neurol 2021 Apr 17. Epub 2021 Apr 17.

Unit of Neurology, IRCCS San Raffaele Scientific Institute, Milan, Italy.

Background: Multiple Sclerosis (MS) susceptibility is influenced by genetics, however little is known about genetic determinants of disease expression. We aimed at assessing genetic factors influencing quantitative neuroimaging measures in two cohorts of Progressive (PMS) and Relapsing-Remitting (RRMS) patients.

Methods: Ninety-nine PMS and 214 RRMS patients underwent a 3T brain MRI scan, with the measurement of five MRI metrics including T2 lesion volumes and measures of white matter, grey matter, deep grey matter and hippocampal volumes. Read More

View Article and Full-Text PDF

Characterization of chronic active multiple sclerosis lesions with sodium ( Na) MRI - preliminary observations.

Eur J Neurol 2021 Apr 17. Epub 2021 Apr 17.

Department of Neurology, Medical Faculty Mannheim and Mannheim Center for Translational Neurosciences (MCTN), University of Heidelberg, 68167, Mannheim, Germany.

Background: There has been an increasing interest in chronic active multiple sclerosis (MS) lesions as a new magnetic resonance imaging (MRI) marker of disease progression. Chronic active lesions are characterized by progressive tissue matrix damage, axonal loss and chronic inflammation. Sodium ( Na) MRI provides a biochemical marker of cell integrity and tissue viability in a quantitative manner. Read More

View Article and Full-Text PDF

Advanced imaging improves detection of baffle leaks and stenoses after atrial switch compared with transthoracic echocardiography.

Int J Cardiovasc Imaging 2021 Apr 17. Epub 2021 Apr 17.

Arkansas Children's Hospital, Little Rock, AR, USA.

Current guidelines for adults with atrial switch repair recommend baseline cardiovascular magnetic resonance (CMR) for assessment of ventricular size and function, systemic and venous baffle obstruction and leaks, and valvular function. It also recommends transthoracic echocardiography (TTE) for outpatient follow up. Many such patients with implanted cardiac devices may need cardiac computed tomography (CCT) when CMR is not feasible. Read More

View Article and Full-Text PDF

Structural MRI substrate of long-duration response to levodopa in Parkinson's disease: an exploratory study.

J Neurol 2021 Apr 17. Epub 2021 Apr 17.

Department of Medical, Surgical Sciences and Advanced Technologies "GF Ingrassia", University of Catania, Via Santa Sofia 78, 95123, Catania, Italy.

Objective: The long-duration response (LDR) to L-dopa is a sustained benefit deriving from chronic administration of therapy to patients with Parkinson's disease (PD). Almost all patients with early PD may develop the LDR to L-dopa, even if some patients could not at given dosages of the drug. Aim of this exploratory study is to investigate whether a neuroanatomical substrate may underlie the development of the of LDR using structural magnetic resonance imaging (MRI) and voxel-based morphometry (VBM) analysis. Read More

View Article and Full-Text PDF

Development and validation of a nomogram for further decision of radical surgery in pT1 colorectal cancer after local resection.

Int J Colorectal Dis 2021 Apr 17. Epub 2021 Apr 17.

Department of Gastrointestinal Surgery, Capital Medical University Affiliated Beijing Friendship Hospital, Beijing, People's Republic of China.

Purpose: The aim of this study was to develop and validate a nomogram to assist physicians making further decisions on the requirement of a radical surgery for T1 colorectal cancer (CRC) after local excision through preoperative prediction of lymph node metastasis (LNM).

Methods: A total of 141 T1 CRC patients were enrolled from January 2013 to August 2020. The independent predictive parameters were determined in multivariate analyses. Read More

View Article and Full-Text PDF

The importance of heart and brain imaging in children and adolescents with Multisystem Inflammatory Syndrome in Children (MIS-C).

Rheumatol Int 2021 Apr 17. Epub 2021 Apr 17.

Department of Pediatrics, Metropolitan Hospital, Piraeus, Greece.

Multisystem Inflammatory Syndrome in Children (MIS-C) recently reported in a minority of children affected by SARS-CoV-2, mimics Kawasaki disease (KD), a medium vessel vasculitis of unknown cause. In contrast to acute COVID-19 infection, which is usually mild in children, 68% of patients with MIS-C will need intensive care unit. Myocarditis and coronary artery ectasia/aneurysm are included between the main cardiovascular complications in MIS-C. Read More

View Article and Full-Text PDF

The triangular fibrocartilage complex on high-resolution 3 T MRI in healthy adolescents: the thin line between asymptomatic findings and pathology.

Skeletal Radiol 2021 Apr 17. Epub 2021 Apr 17.

Department of Radiology and Nuclear Medicine, Amsterdam Movement Sciences, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands.

Objective: The objective of the study is to provide a reference for morphology, homogeneity, and signal intensity of triangular fibrocartilage complex (TFCC) and TFCC-related MRI features in adolescents.

Materials And Methods: Prospectively collected data on asymptomatic participants aged 12-18 years, between June 2015 and November 2017, were retrospectively analyzed. A radiograph was performed in all participants to determine skeletal age and ulnar variance. Read More

View Article and Full-Text PDF

Dietary-challenged mice with Alzheimer-like pathology show increased energy expenditure and reduced adipocyte hypertrophy and steatosis.

Aging (Albany NY) 2021 Apr 16;13. Epub 2021 Apr 16.

Department of Endocrinology and Metabolism, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin 10117, Germany.

Alzheimer's disease (AD) is frequently accompanied by progressing weight loss, correlating with mortality. Counter-intuitively, weight loss in old age might predict AD onset but obesity in midlife increases AD risk. Furthermore, AD is associated with diabetes-like alterations in glucose metabolism. Read More

View Article and Full-Text PDF

Neural Correlates of Alcohol Use Disorder Severity among Non-Treatment Seeking Heavy Drinkers: An Examination of the Incentive Salience and Negative Emotionality Domains of the Alcohol and Addiction Research Domain Criteria.

Alcohol Clin Exp Res 2021 Apr 17. Epub 2021 Apr 17.

The Mind Research Network, Albuquerque, NM, USA.

Background: The Alcohol and Addiction Research Domain Criteria (AARDoC) proposes that alcohol use disorder is associated with neural dysfunction in three primary domains: incentive salience, negative emotionality, and executive function. Prior studies in heavy drinking samples have examined brain activation changes associated with alcohol and negative affect cues, representing the incentive salience and negative emotionality domains, respectively; yet studies examining such cue-induced changes in functional connectivity are relatively sparse.

Methods: Non-treatment seeking heavy drinking adults (N=149, 56. Read More

View Article and Full-Text PDF

Para-testicular lesions: Aetiology and Appearances on Ultrasound.

Andrology 2021 Apr 16. Epub 2021 Apr 16.

King's College London, Department of Radiology, King's College Hospital, London, United Kingdom.

Background: Ultrasound (US) is the primary modality for the investigation of scrotal pathology, including both intra- and para-testicular abnormalities.

Objective: To describe the abnormalities of the para-testicular space.

Materials/methods: The para-testicular space contains the epididymis, spermatic cord and the tunica vaginalis cavity and is affected by a variety of inflammatory or tumoral entities. Read More

View Article and Full-Text PDF

Magnetic Resonance Biomarkers in Radiation Oncology.

Med Phys 2021 Apr 17. Epub 2021 Apr 17.

Department of Radiation Oncology, Anderson Cancer Center, University of Texas, Houston, Texas, USA.

A magnetic resonance (MR) biologic marker (biomarker) is a measurable quantitative characteristic that is an indicator of normal biological and pathogenetic processes or a response to therapeutic intervention derived from the MR imaging process. There is significant potential for MR biomarkers to facilitate personalized approaches to cancer care through more precise disease targeting by quantifying normal versus pathologic tissue function as well as toxicity to both radiation and chemotherapy. Both of which have the potential to increase the therapeutic ratio and provide earlier, more accurate monitoring of treatment response. Read More

View Article and Full-Text PDF

Exploring communication between the thalamus and cognitive control-related functional networks in the cerebral cortex.

Cogn Affect Behav Neurosci 2021 Apr 17. Epub 2021 Apr 17.

Department of Psychology, Renmin University of China, Beijing, 100872, China.

It has been suggested by multiple studies (postmortem studies, invasive animal studies, and diffusion tensor imaging in the human brain) that the thalamus is important for communication among cortical regions. Many functional magnetic resonance imaging (fMRI) studies, including noninvasive and whole-brain studies, have reported thalamic co-activation with several cognitive control-related cortical systems. This forms a complex network that may be important for advanced cognitive control-related processes, such as working memory and attention. Read More

View Article and Full-Text PDF

Focal seizures with impaired awareness as long-term neurological complication of COVID-19: a case report.

Neurol Sci 2021 Apr 16. Epub 2021 Apr 16.

Department of Neuroscience "Rita Levi Montalcini", University of Torino, Via Cherasco 15, 10126, Turin, Italy.

We report here the first case of a young individual otherwise healthy, who presented with frequent focal seizures with impaired awareness as a possible long-term complication of severe acute respiratory syndrome coronavirus-2 infection. Seizures were documented by electroencephalography and responded clinically and neuro-physiologically to antiseizure therapy. The patient underwent an extensive investigation including cerebrospinal fluid examination, conventional and quantitative brain magnetic resonance imaging, and 18-FDG positron emission tomography. Read More

View Article and Full-Text PDF

Noninvasive prediction of residual disease for advanced high-grade serous ovarian carcinoma by MRI-based radiomic-clinical nomogram.

Eur Radiol 2021 Apr 16. Epub 2021 Apr 16.

Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, 215163, China.

Objectives: To develop a preoperative MRI-based radiomic-clinical nomogram for prediction of residual disease (RD) in patients with advanced high-grade serous ovarian carcinoma (HGSOC).

Methods: In total, 217 patients with advanced HGSOC were enrolled from January 2014 to June 2019 and randomly divided into a training set (n = 160) and a validation set (n = 57). Finally, 841 radiomic features were extracted from each tumor on T2-weighted imaging (T2WI) and contrast-enhanced T1-weighted imaging (CE-T1WI) sequence, respectively. Read More

View Article and Full-Text PDF

Metabolic imaging detects elevated glucose flux through the pentose phosphate pathway associated with TERT expression in low-grade gliomas.

Neuro Oncol 2021 Apr 17. Epub 2021 Apr 17.

Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA.

Background: Telomerase reverse transcriptase (TERT) is essential for tumor proliferation, including in low-grade oligodendrogliomas (LGOGs). Since TERT is silenced in normal cells, it is also a therapeutic target. Therefore, non-invasive methods of imaging TERT are needed. Read More

View Article and Full-Text PDF

Diagnostic Accuracy and Clinical Impact of [ 18F]FET PET in Childhood CNS tumors.

Neuro Oncol 2021 Apr 17. Epub 2021 Apr 17.

Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital Rigshospitalet, Denmark.

Background: Central nervous system (CNS) tumors cause the highest death rates among childhood cancers, and survivors frequently have severe late effects. Magnetic resonance imaging (MRI) is the imaging modality of choice, but its specificity can be challenged by treatment-induced signal changes. In adults, O-(2-[ 18F]fluoroethyl)-L-tyrosine ([ 18F]FET) PET can assist in interpreting MRI findings. Read More

View Article and Full-Text PDF

Update in imaging of cancer therapy-related cardiac toxicity in adults.

Open Heart 2021 Apr;8(1)

Pediatric Cardiology, Wilhelmina Children's Hospital University Medical Centre, Utrecht, The Netherlands

Over the past decades, prognosis of patients with cancer has strongly improved and the number of cancer survivors is rapidly growing. Despite this success, cancer treatment is associated with development of serious cardiovascular diseases including left ventricular (LV) systolic dysfunction, heart failure, valvular disease, myocardial infarction, arrhythmias or pericardial diseases. Serial non-invasive cardiac imaging is an important tool to detect early signs of cardiotoxicity, to allow for timely intervention and provide optimal circumstances for long-term prognosis. Read More

View Article and Full-Text PDF

Differentiation between multiple sclerosis and neuromyelitis optica spectrum disorders by multiparametric quantitative MRI using convolutional neural network.

J Clin Neurosci 2021 May 11;87:55-58. Epub 2021 Mar 11.

Department of Radiology, Juntendo University School of Medicine, 1-2-1, Hongo, Bunkyo-ku, Tokyo 113-8421, Japan.

Multiple sclerosis and neuromyelitis optica spectrum disorders are both neuroinflammatory diseases and have overlapping clinical manifestations. We developed a convolutional neural network model that differentiates between the two based on magnetic resonance imaging data. Thirty-five patients with relapsing-remitting multiple sclerosis and eighteen age-, sex-, disease duration-, and Expanded Disease Status Scale-matched patients with anti-aquaporin-4 antibody-positive neuromyelitis optica spectrum disorders were included in this study. Read More

View Article and Full-Text PDF

Acute non-traumatic tetraparesis - Differential diagnosis.

J Clin Neurosci 2021 May 20;87:116-124. Epub 2021 Mar 20.

Department of Neurology, Hospital da Luz Lisboa, Lisbon, Portugal; Department of Neurology, Department of Neurosciences and Mental Health, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal; Institute of Physiology, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal.

Introduction: Potentially life-threatening disorders may present in the emergency department with acute tetraparesis, and their recognition is crucial for an appropriate management and timely treatment. Our review aims to systematize the differential diagnosis of acute non-traumatic tetraparesis.

Results: Causes of tetraparesis can be classified based on the site of defect: upper motor neuron (UMN), peripheral nerve, neuromuscular junction or muscle. Read More

View Article and Full-Text PDF

The Relationship Between Amount of Extra-prostatic Extension and Length of Capsular Contact: Performances from MR Images and Radical Prostatectomy Specimens.

Turk J Med Sci 2021 Apr 17. Epub 2021 Apr 17.

Objectives: In prostate cancer, extraprostatic extension (EPE) is an unfavorable prognostic factor and the grade of EPE is correlated with the prognosis. This study aims to evaluate the utility of length of capsular contact (LCC ) in predicting the grade of EPE by correlating the measurements from MRI images and the measurements performed from radical prostatectomy specimens.

Methods: MR images and specimens of 110 tumors are analyzed retrospectively. Read More

View Article and Full-Text PDF

Multimodal brain predictors of current weight and weight gain in children enrolled in the ABCD study ®.

Dev Cogn Neurosci 2021 Mar 30;49:100948. Epub 2021 Mar 30.

Department of Psychiatry, University of Vermont, Burlington, VT, USA; Department of Psychological Science, University of Vermont, Burlington, VT, USA.

Multimodal neuroimaging assessments were utilized to identify generalizable brain correlates of current body mass index (BMI) and predictors of pathological weight gain (i.e., beyond normative development) one year later. Read More

View Article and Full-Text PDF

COVID-19-related myocarditis post-heart transplantation.

Int J Infect Dis 2021 Apr 13. Epub 2021 Apr 13.

Department of Cardiology, Thorax Center, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands; Erasmus MC Transplant Institute, University Medical Center Rotterdam, Rotterdam, The Netherlands. Electronic address:

We describe the first heart transplantation recipient with acute biventricular heart failure symptoms caused by a post-myocarditis state late after a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. No other viral pathogens could be detected, computed tomography angiography did not show cardiac allograft vasculopathy, and myocardial biopsy demonstrated no clinically relevant rejection. Subsequent cardiovascular magnetic resonance imaging revealed extensive epicardial delayed enhancement without myocardial edema. Read More

View Article and Full-Text PDF