88,406 results match your criteria examination mri


Clinical safety evaluation of contrast agents based on real-world evidence.

J Clin Pharm Ther 2021 Jul 22. Epub 2021 Jul 22.

Department of Pharmacy, Wenling Hospital of Traditional Chinese Medicine Affiliated to Zhejiang University of Traditional Chinese Medicine, Wenling, China.

What Is Known And Objective: This study was aimed at comparing the adverse drug reactions (ADRs) arising from the use of iodinated contrast medium (ICM) and gadolinium-based contrast media (GBCM), and to provide a basis for the clinical selection of contrast media.

Methods: Retrospective data for ADR cases occurring from the use of ICM or GBCM during enhanced scanning in computed tomography and magnetic resonance imaging were collected between June/2013 and May/2020 from Wenling Hospital of Traditional Chinese Medicine. Chi-square tests were performed based on the characteristics of patients and the classification of contrast medium. Read More

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Age-Dependent Changes in Total and Free Water Content of In Vivo Human Lenses Measured by Magnetic Resonance Imaging.

Invest Ophthalmol Vis Sci 2021 Jul;62(9):33

Department of Physiology, School of Medical Sciences, New Zealand National Eye Centre, University of Auckland, New Zealand.

Purpose: To use magnetic resonance imaging (MRI) to measure age-dependent changes in total and free water in human lenses in vivo.

Methods: Sixty-four healthy adults aged 18 to 86 years were recruited, fitted with a 32-channel head receiver coil, and placed in a 3 Tesla clinical MR scanner. Scans of the crystalline lens were obtained using a volumetric interpolated breath-hold examination sequence with dual flip angles, which were corrected for field inhomogeneity post-acquisition using a B1-map obtained using a turbo-FLASH sequence. Read More

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Cerebellum Tumor Presenting Itself With Positional Vertigo and Benign Paroxysmal Positional Vertigo.

J Craniofac Surg 2021 Jul 20. Epub 2021 Jul 20.

ENT Clinics Department of Neurology, Afyonkarahisar State Hospital Department of Neurology, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey.

Abstract: The purpose of this case is to describe the positional vertigo observed in a patient diagnosed with cerebellar arteriovenous malformation, pay attention to the importance of medical history taking and physical examination in vertigo patients.A 51-year-old patient went to the Ear, Nose, and Throat clinic with a complaint of vertigo. His vertigo was like peripheral vertigo at the beginning. Read More

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Interdisciplinary management of peripheral arteriovenous malformations: review of the literature and current proceedings.

J Plast Surg Hand Surg 2021 Jul 22:1-10. Epub 2021 Jul 22.

Clinic for Radiology and Nuclear Medicine, University Medical Center Mannheim, Medical Faculty Mannheim - Heidelberg University, Mannheim, Germany.

Arteriovenous malformations (AVMs) are a rare congenital vascular disorder. They represent a fast-flow vascular malformation. Clinically, AVMs present a heterogenous expression and can affect every part of the body. Read More

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The Validation of Clinical Examination and MRI as a Diagnostic Tool for Cruciate Ligaments and Meniscus Injuries of the Knee Against Diagnostic Arthroscopy.

Cureus 2021 Jun 17;13(6):e15727. Epub 2021 Jun 17.

Department of Orthopedic Surgery, King George's Medical University, Lucknow, IND.

Background: This study was conducted to compare the accuracy of MRI findings and clinical examination of ligamentous and meniscal injuries of the knee, taking arthroscopy as a standard diagnostic tool in knee injuries.  Methods: All patients with knee injuries attending the outpatient department or emergency of our hospital underwent clinical examination. Out of them, 60 patients with knee injuries were subjected to clinical examination, MRI, and then arthroscopy. Read More

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A Spanish Neuropsychological Battery Discriminates Between the Behavioral Variant of Frontotemporal Dementia and Primary Progressive Aphasia in a Colombian Sample.

Front Neurol 2021 5;12:656478. Epub 2021 Jul 5.

Neuroscience Group of Antioquia, The University of Antioquia, Medellín, Colombia.

The differential diagnosis among the behavioral variant of frontotemporal dementia FTD (bvFTD) and the linguist one primary progressive aphasia (PPA) is challenging. Presentations of dementia type or variants dominated by personality change or aphasia are frequently misinterpreted as psychiatric illness, stroke, or other conditions. Therefore, it is important to identify cognitive tests that can distinguish the distinct FTD variants to reduce misdiagnosis and best tailor interventions. Read More

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Spontaneous intracranial hypotension presenting with progressive cognitive decline.

BMJ Case Rep 2021 Jul 21;14(7). Epub 2021 Jul 21.

Danish Headache Center, Department of Neurology, University of Copenhagen, Rigshospitalet-Glostrup, DK, Glostrup, Denmark

A 63-year-old woman presented with headache, progressive somnolence, neurocognitive decline and urinary incontinence through a year. Medical history was unremarkable except for hypertension and hypercholesterolaemia. Neurological examination was normal. Read More

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Optic perineuritis in polyarthritis nodosa.

BMJ Case Rep 2021 Jul 21;14(7). Epub 2021 Jul 21.

Neurology, Maasstad Hospital, Rotterdam, Zuid-Holland, The Netherlands.

A 52-year-old male patient with polyarthritis nodosa (PAN) was referred to our neurology outpatient clinic. His main symptom was paroxysmal alternating bilateral blindness. Subsequently, he developed retro-orbital pain. Read More

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Clinical semiology of temporal lobe seizures in preschool children: contribution of invasive recording to anatomical classification.

Epileptic Disord 2021 Jul 19. Epub 2021 Jul 19.

Pediatric neurosurgery Department, Rothschild Fondation hospital, Paris, France.

Focal seizure semiology is often inadequately studied, specifically in preschool children. Among drug-resistant epilepsies amenable to surgery, temporal lobe seizure semiology has been widely described in this age group. Nevertheless, a systematic anatomo-electroclinical study has never been performed. Read More

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Successful resection of a huge hepatocellular adenoma.

Clin J Gastroenterol 2021 Jul 21. Epub 2021 Jul 21.

Department of Surgery, Kindai University Nara Hospital, Otoda-cho 1248-1, Ikoma, Nara, 630-0293, Japan.

Hepatocellular adenoma (HCA) is a rare benign liver tumor that has been reported to occur particularly more often in women who use contraceptives. A 72-year-old woman with no history of using contraceptives presented to our hospital for further examination of a liver tumor. Contrast-enhanced computed tomography and gadoxetic acid-enhanced magnetic resonance imaging revealed a huge solitary hepatic tumor measuring 83 × 76 mm in segments 4, 5, and 8. Read More

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Real-time cognitive performance and positive symptom expression in schizophrenia.

Eur Arch Psychiatry Clin Neurosci 2021 Jul 21. Epub 2021 Jul 21.

Institut de Neurosciences Cognitives et Intégratives d'Aquitaine (INCIA), University of Bordeaux/CNRS-UMR 5287, Bordeaux, France.

Deficits in cognitive functions are frequent in schizophrenia and are often conceptualized as stable characteristics of this disorder. However, cognitive capacities may fluctuate over the course of a day and it is unknown if such variation may be linked to the dynamic expression of psychotic symptoms. This investigation used Ecological Momentary Assessment (EMA) to provide mobile tests of cognitive functions and positive symptoms in real time. Read More

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Assessment of myelination in infants and young children by T1 relaxation time measurements using the magnetization-prepared 2 rapid acquisition gradient echoes sequence.

Pediatr Radiol 2021 Jul 21. Epub 2021 Jul 21.

Institute of Neuroradiology, Charité - University Medicine Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.

Background: Axonal myelination is an important maturation process in the developing brain. Increasing myelin content correlates with the longitudinal relaxation rate (R1=1/T1) in magnetic resonance imaging (MRI).

Objective: By using magnetization-prepared 2 rapid acquisition gradient echoes (MP2RAGE) on a 3-T MRI system, we provide R1 values and myelination rates for infants and young children. Read More

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Exercise Capacity in Young Adults Born Small for Gestational Age.

JAMA Cardiol 2021 Jul 21. Epub 2021 Jul 21.

Fetal Medicine Research Center, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia Obstetricia i Neonatologia, Universitat de Barcelona, Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain.

Importance: Being born small for gestational age (SGA), approximately 10% of all births, is associated with increased risk of cardiovascular mortality in adulthood, but mechanistic pathways are unclear. Cardiac remodeling and dysfunction occur in fetuses SGA and children born SGA, but it is uncertain whether and how these changes persist into adulthood.

Objective: To evaluate baseline cardiac function and structure and exercise capacity in young adults born SGA. Read More

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Segment Length in Cine Strain Analysis Predicts Cardiac Resynchronization Therapy Outcome Beyond Current Guidelines.

Circ Cardiovasc Imaging 2021 Jul 20;14(7):e012350. Epub 2021 Jul 20.

Department of Cardiology, and Amsterdam Cardiovascular Sciences (ACS) (A.Z., C.V., P.S.B., A.C.v.R., C.P.A., R.N.), Amsterdam University Medical Center, location VU Medical Center, Amsterdam, The Netherlands.

Background: Patients with a class I recommendation for cardiac resynchronization therapy (CRT) are likely to benefit, but the effect of CRT in class II patients is more heterogeneous and additional selection parameters are needed in this group. The recently validated segment length in cine strain analysis of the septum (SLICE-ESS) measurement on cardiac magnetic resonance cine imaging predicts left ventricular functional recovery after CRT but its prognostic value is unknown. This study sought to evaluate the prognostic value of SLICE-ESS for clinical outcome after CRT. Read More

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Feasibility and Safety of Neonatal Brain Contrast-Enhanced Ultrasound: A Prospective Study Using MRI as Reference Standard.

AJR Am J Roentgenol 2021 Jul 21. Epub 2021 Jul 21.

University of Pittsburgh School of Medicine, Department of Radiology.

MRI is the gold standard for neonatal brain imaging but is expensive, time-consuming, potentially limited by availability and accessibility, and may be contraindicated in some patients. Transfontanelle neonatal head ultrasound is an excellent alternative but may be less sensitive and specific than MRI. Contrast-enhanced ultrasound (CEUS) has the potential to improve ultrasound's capabilities. Read More

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Magnetic resonance imaging incidents are severely underreported: a finding in a multicentre interview survey.

Eur Radiol 2021 Jul 20. Epub 2021 Jul 20.

Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.

Objectives: The purpose of this study was to develop a procedure to investigate the occurrence, character and causes of magnetic resonance (MR) imaging incidents.

Methods: A semi-structured questionnaire was developed containing details such as safety zones, examination complexity, staff MR knowledge, staff categories, and implementation of EU directive 2013/35. We focused on formally reported incidents that had occurred during 2014-2019, and unreported incidents during one year. Read More

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Case report: 'AARS2 leukodystrophy'.

Mol Genet Metab Rep 2021 Sep 13;28:100782. Epub 2021 Jul 13.

Department of Clinical Genetics, Rigshospitalet, Copenhagen, Denmark.

Background: Mitochondrial alanyl-tRNA synthetase 2 gene () related disease is a rare genetic disorder affecting mitochondrial metabolism, leading to severe cardiac disease in infants or progressive leukodystrophy in young adults. The disease is considered ultra-rare with only 39 cases of AARS2-leukodystrophy previously reported.

Case Presentation: We present the case of a young man of consanguineous heritage suffering from cognitive decline and progressive spasticity as well as weakness of the proximal musculature. Read More

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September 2021

Mediastinal thymoma: A difficult diagnosis in the pediatric age.

Radiol Case Rep 2021 Sep 9;16(9):2579-2585. Epub 2021 Jul 9.

Unit of Radiology, A.O.R.N. Santobono-Pausilipon, Santobono Hospital, Naples, Italy.

Thymoma is a rare neoplasm of the anterior mediastinum, which originates from the epithelium of the thymic gland; it occurs mainly in middle-aged adults and is much less common in children. The tumor has slow growth and is asymptomatic in most pediatric cases, thus resulting in an accidental discovery; one-third of the young patient presents symptoms related to the compression of the tumor mass on the surrounding anatomic structures and/or related to paraneoplastic syndromes. Surgery is the treatment of choice and complete resection of the thymoma achieves excellent long-term results in terms of disease-free survival. Read More

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September 2021

20p11.23-p11.21 deletion in a child with hyperinsulinemic hypoglycemia and GH deficiency: A case report.

Clin Pediatr Endocrinol 2021 10;30(3):133-137. Epub 2021 Jul 10.

Department of Pediatrics, Saitama Medical Center Jichi Medical University, Saitama, Japan.

Some neonatal hypoglycemias have genetic origins. For instance, mutation in forkhead box protein A2 (), located on chromosome 20p11.21, has recently been reported to cause hyperinsulinemic hypoglycemia and hypopituitarism. Read More

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Giant plurihormonal pituitary adenoma in a child - case study.

J Pediatr Endocrinol Metab 2021 Jul 21. Epub 2021 Jul 21.

Department of Endocrinology and Diabetology, Children's Memorial Health Institute, Warsaw, Poland.

Objectives: To describe the case of a 12-year-old girl with a rare plurihormonal pituitary macroadenoma secreting prolactin (PRL), growth hormone (GH), thyroid-stimulating hormone (TSH), and alpha subunit (α-SU).

Case Presentation: The patient experienced recurrent headaches and progressing loss of vision in one eye. During the examination, abnormalities such as tall stature, coarse facial features, enlarged feet and hands, tachycardia, hand tremor, hyperhidrosis, galactorrhea, and goiter were observed. Read More

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Cognitive Impairment in Multiple System Atrophy Is Related to White Matter Damage Detected by the T1-Weighted/T2-Weighted Ratio.

Eur Neurol 2021 Jul 20:1-9. Epub 2021 Jul 20.

Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan.

Introduction: This study aimed to use a novel MRI contrast, the standardized T1-weighted/T2-weighted (sT1w/T2w) ratio, to assess damage of the white matter and gray matter in multiple system atrophy (MSA). Furthermore, this study investigated whether the sT1w/T2w ratio was associated with cognitive impairment in MSA.

Methods: The white matter and gray matter sT1w/T2w ratio of 37 MSA patients and 19 healthy controls were measured. Read More

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[The effectiveness of botulinum therapy of trigeminal neuralgia].

Zh Nevrol Psikhiatr Im S S Korsakova 2021 ;121(6):40-45

Izhevsk State Medical Academy, Izhevsk, Russia.

Objective: To evaluate the treatment protocol with the use of onabotulinum toxin type A (botox) and the efficacy of a single botulinum therapy procedure for clinical manifestations in patients with trigeminal neuralgia (TN).

Material And Methods: We studied 90 patients (57 women, 33 men), including 80 people with primary TN and 10 people with secondary TN. Then 20 patients with primary TN (11 women and 9 men, mean age 61. Read More

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[The structural basis of epileptogenesis in an adult patient: the comprehensive diagnostics experience].

Zh Nevrol Psikhiatr Im S S Korsakova 2021 ;121(6):27-33

Pirogov Russian National Research Medical University, Moscow, Russia.

On the example of the diagnosis of the structural basis of focal epilepsy in an adult patient, the possibilities of a multimodal and interdisciplinary approach to diagnosis, combining the latest methods of neuroimaging with the results of neurophysiological examinations, are considered. The interaction and high qualification of specialists in epileptology, neuroradiology and pathomorphology provide a high probability to determine the cause of the focal forms of epilepsy. Along with the introduction of super-inductive MR systems, it is important to use their capabilities correctly and optimize the scanning protocol for the individual characteristics of the patient. Read More

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Cerebrospinal fluid signal loss sign: assessment of a new radiological sign in lumbar spinal stenosis.

Eur Spine J 2021 Jul 20. Epub 2021 Jul 20.

Department of Orthopedics and Traumatology, Izzet Baysal Faculty of Medicine, Bolu Abant Izzet Baysal University, 14280, Bolu, Turkey.

Purpose: Sedimentation sign was reported to have high sensitivity and specificity for diagnosis of lumbar spinal stenosis (LSS). We aimed to determine cerebrospinal fluid signal loss (CSFSL) at the intervertebral disc levels in the sagittal plane using a numerical scoring system and to evaluate the diagnostic value of this method in differential diagnosis of LSS and non-specific low back pain (LBP) and compare it with SS.

Materials And Methods: We included consecutive patients between 50 and 80 years old, with lumbar spinal MRI examination in our institution. Read More

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Assessing and conveying risks and benefits of imaging in neonates using ionizing radiation and sedation/anesthesia.

Pediatr Radiol 2021 Jul 20. Epub 2021 Jul 20.

Department of Radiology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.

Neonates represent a unique subset of the pediatric population that requires special attention and careful thought when implementing advanced cross-sectional imaging with CT or MRI. The ionizing radiation associated with CT and the sedation/anesthesia occasionally required for MRI present risks that must be balanced against the perceived benefit of the imaging examination in the unique and particularly susceptible neonatal population. We review the perceived risks of ionizing radiation and the more concrete risks of sedation/anesthesia in term and preterm neonates in the context of an imaging paradigm. Read More

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Cerebral venous thrombosis in a child with inflammatory bowel disease.

Iran J Child Neurol 2021 ;15(3):159-166

Pediatric Gastroenterology, Hepatology and Nutrition Research Center, Shahid Beheshti Shahid Beheshti University of Medical Sciences.

Background: Inflammatory bowel disease (IBD) has both intestinal and extraintestinal manifestations. Inflammatory bowel disease is a known risk factor for cerebral venous thrombosis (CVT) in adults and children. The precise mechanism of the thrombotic event is unclear in IBD patients. Read More

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January 2021

Nonsyndromic Primary Diffuse Leptomeningeal Melanomatosis in a Child.

Iran J Child Neurol 2021 ;15(3):153-157

Department of Neurological Surgery, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Introduction: In this study, we present a case of primary diffuse leptomeningeal melanomatosis (PDLM), without neurocutaneous melanosis syndrome. A female patient (age: 14 years) presented with headache, nausea, vomiting, vertigo, diplopia, and lower limb weakness. The magnetic resonance imaging (MRI) showed leptomeningeal isointensity on T1- and T2-weighted images and hyperintensity on fluid attenuation inversion recovery (FLAIR) sequences. Read More

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January 2021

Selective Unique Signs of Meniscus Tears as Visualized by Magnetic Resonance Imaging.

Clin J Sport Med 2021 Jul 16. Epub 2021 Jul 16.

Connecticut Convergence Institute for Translation in Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut; Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health, Farmington, Connecticut; Howard University College of Medicine, Washington, District of Columbia; Department of Musculoskeletal Radiology, University of Connecticut Health Center, Farmington, Connecticut; Department of Biomedical Engineering, University of Connecticut, Storrs, Connecticut; Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut; Institute of Materials Science, University of Connecticut, Storrs, Connecticut; Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, Connecticut; and Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut.

Abstract: The meniscus is an organized collection of fibrocartilaginous tissue that is located between the femoral condyles and the tibial plateau of the knee which primarily assists with load transmission. The complex composition of articulating soft-tissue structures in the knee causes the menisci to become a common source of injury, especially in the realm of athletic trauma. Magnetic resonance imaging (MRI) has become the imaging modality of choice for evaluating patients with suspected meniscal pathology because of its numerous advantages over plain radiographs. Read More

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McCune-Albright syndrome onset with vaginal bleeding.

BMJ Case Rep 2021 Jul 19;14(7). Epub 2021 Jul 19.

Department of Radiology, Vinmec Healthcare System, Hanoi, Viet Nam.

McCune-Albright syndrome (MAS), a rare genetic disorder, affects multiple organs and classically presents with the triad of polyostotic fibrous dysplasia (FD), skin hyperpigmentation (café-au-lait spots) and precocious puberty. Diagnosis occurs when patients manifest at least two of these three symptoms. We describe a 4-year-old girl who was admitted to our hospital due to recurrent vaginal bleeding, initially diagnosed as precocious puberty. Read More

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Indocyanine Green Fluorescence Image-guided Laparoscopic Hepatectomy Enabled Resection of a Tumor Invisible With Ultrasonography.

Anticancer Res 2021 Aug;41(8):3867-3869

Department of General and Gastroenterological Surgery, Showa University School of Medicine, Tokyo, Japan.

Background: Ultrasonography (US) is widely used for pre-operative detection of liver tumors. However, US does not have high resolution and very small tumors, tumors located near the liver surface, or those in cirrhotic livers are often not detected.

Case Report: A 47-year-old woman with a previous surgery for sigmoid colon cancer (T3N1bM0 Stage3b) showed a liver tumor on the surface of segment 2 by contrast-enhanced computed tomography (CT) and gadoliniumethoxybenzyldiethlenetriaminepen-taacetic acid (Gd-EOB-DTPA) magnetic resonance imaging (MRI). Read More

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