keyword
MENU ▼
Read by QxMD icon Read
search

MRI imaging

keyword
https://www.readbyqxmd.com/read/28938612/magnetic-resonance-imaging-tracking-and-assessing-repair-function-of-the-bone-marrow-mesenchymal-stem-cells-transplantation-in-a-rat-model-of-spinal-cord-injury
#1
Hongwu Zhang, Liqin Wang, Shihong Wen, Qingfeng Xiang, Xianhong Xiang, Caixia Xu, Yong Wan, Jingnan Wang, Bin Li, Yiqian Wan, Zhiyun Yang, David Y B Deng
The transplantation of bone marrow mesenchymal stem cells (BMSCs) to repair spinal cord injury (SCI) has become a promising therapy. However, there is still a lack of visual evidence directly implicating the transplanted cells as the source of the improvement of spinal cord function. In this study, BMSCs were labeled with NF-200 promoter and lipase-activated gadolinium-containing nanoparticles (Gd-DTPA-FA). Double labeled BMSCs were implanted into spinal cord transaction injury in rat models in situ, the function recovery was evaluated on 1st, 7th, 14th, 28 th days by MRI, Diffusion Tensor Imaing, CT imaging and post-processing, and histological observations...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938274/pain-free-3-t-mri-scans-in-cochlear-implantees
#2
Ingo Todt, Anja Tittel, Arne Ernst, Philipp Mittmann, Sven Mutze
OBJECTIVE: For cochlear implant recipients, undergoing magnetic resonance imaging (MRI) scans is associated with safety risks and potential side effects. Even following safety guidelines, potential complications (e.g., pain, magnet dislocation, image artifacts) are possible during 1.5 Tesla (T) MRI scans. The stronger static magnetic field of a 3.0 T scanner is associated with further risks of complication, including implant demagnetization. These complications led to the recent development of rotatable internal receiver magnets with a diametrical magnetization...
September 21, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28938107/lhermitte-duclos-disease-clinical-study-with-long-term-follow-up-in-a-single-institution
#3
Qiguang Wang, Si Zhang, Jian Cheng, Wenke Liu, Xuhui Hui
OBJECTIVE: LDD is a rare lesion, controversy about diagnosis and treatment of LDD and CS still exists. We aimed to clarify clinical and radiological characteristics, the optimal treatment timing and strategies of LDD with long-term follow-up. PATIENTS AND METHODS: From January 2004 to May 2017, 12 LDD patients were enrolled in our study. The clinical and radiological features, treatment strategies and long-term follow-up data were retrospectively analyzed. RESULTS: The mean follow-up was 89...
September 9, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28937545/non-contrast-pseudo-continuous-arterial-spin-labeling-and-accelerated-3-dimensional-radial-acquisition-intracranial-3-dimensional-magnetic-resonance-angiography-for-the-detection-and-classification-of-intracranial-arteriovenous-shunts
#4
Tilman Schubert, Zachary Clark, Carolina Sandoval-Garcia, Ryan Zea, Oliver Wieben, Huimin Wu, Patrick A Turski, Kevin M Johnson
OBJECTIVES: The aim of this study was to assess the sensitivity and specificity of pseudo-continuous arterial spin labeling (PCASL) magnetic resonance angiography (MRA) with 3-dimensional (3D) radial acquisition for the detection of intracranial arteriovenous (AV) shunts. MATERIALS AND METHODS: A total of 32 patients who underwent PCASL-MRA, clinical magnetic resonance imaging (MRI)/MRA exam, and digital subtraction angiography (DSA) were included in this retrospective analysis...
September 20, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28937488/the-significance-of-arachnoid-granulation-in-patients-with-idiopathic-intracranial-hypertension
#5
Gaurav Vishwasrao Watane, Bhumi Patel, Derek Brown, M Reza Taheri
PURPOSE: The aim of this article was to study the significance of arachnoid granulations (AGs) in patients with idiopathic intracranial hypertension (IIH). METHODS: In an institutional review board-approved retrospective chart review study, 79 patients with clinical diagnosis of idiopathic increased intracranial pressure were compared with 63 patients with a diagnosis of multiple sclerosis. Inclusion criteria also included available magnetic resonance imaging (MRI) of the brain, older than 18 years, and female sex...
September 20, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28937324/impact-of-2-staged-stereotactic-radiosurgery-for-treatment-of-brain-metastases-%C3%A2-2-cm
#6
Lilyana Angelov, Alireza M Mohammadi, Elizabeth E Bennett, Mahmoud Abbassy, Paul Elson, Samuel T Chao, Joshua S Montgomery, Ghaith Habboub, Michael A Vogelbaum, John H Suh, Erin S Murphy, Manmeet S Ahluwalia, Sean J Nagel, Gene H Barnett
OBJECTIVE Stereotactic radiosurgery (SRS) is the primary modality for treating brain metastases. However, effective radiosurgical control of brain metastases ≥ 2 cm in maximum diameter remains challenging and is associated with suboptimal local control (LC) rates of 37%-62% and an increased risk of treatment-related toxicity. To enhance LC while limiting adverse effects (AEs) of radiation in these patients, a dose-dense treatment regimen using 2-staged SRS (2-SSRS) was used. The objective of this study was to evaluate the efficacy and toxicity of this treatment strategy...
September 22, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28937274/visualization-of-the-lumbar-nerve-using-reduced-field-of-view-diffusion-tensor-imaging
#7
Yawara Eguchi, Hirohito Kanamoto, Sumihisa Orita, Kazuhide Inage, Kazuki Fujimoto, Yasuhiro Shiga, Koki Abe, Masahiro Inoue, Hideyuki Kinoshita, Koji Matsumoto, Yoshitada Masuda, Masao Koda, Yasuchika Aoki, Yasuhiro Oikawa, Kazuhisa Takahashi, Seiji Ohtori, Takeo Furuya, Atsuya Watanabe
OBJECTIVE: We investigated high resolution diffusion tensor imaging (DTI) of lumbar nerves with reduced field-of-view (rFOV) using 3-Tesla MRI. METHODS: DTI measured with rFOV was compared with conventional FOV (cFOV) 3.0 T MRI in 5 healthy volunteers and 10 patients with degenerative lumbar disorders. The intracanal, foramina, and extraforamina of the L5 nerve were established as the regions-of-interest (ROI) and fractional anisotropy (FA) values and apparent diffusion coefficient (ADC) values were measured...
September 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28937270/feasibility-of-free-breathing-lung-mri-for-radiotherapy-using-non-cartesian-k-space-acquisition-schemes
#8
Shivani Kumar, Robba Rai, Alto Stemmer, Sonal Josan, Lois Holloway, Shalini Vinod, Daniel Moses, Gary Liney
OBJECTIVES: To test a free breathing MRI protocol for anatomical and functional assessment during lung cancer radiotherapy by assessing two non-cartesian acquisition schemes based on a T1W 3D gradient recall echo sequence: (i) stack-of stars (StarVIBE) and (ii) spiral (SpiralVIBE) trajectories Methods: MR images on five healthy volunteers were acquired on a wide bore 3T scanner (Skyra, Siemens Healthcare). Anatomical image quality was assessed on: (1) free breathing (StarVIBE), (2) the standard clinical sequence (VIBE) acquired in a 20 second compliant breath-hold and (3) 20 second non-complaint breath-hold...
September 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28937266/statistical-analysis-of-adcs-and-clinical-biomarkers-in-detecting-acute-renal-transplant-rejection
#9
Elizabeth Hollis, Mohamed Shehata, Mohamed Abou El-Ghar, Mohammed Ghazal, Tarek Eldiasty, Michael Merchant, Andrew E Switala, Ayman El-Baz
OBJECTIVE: To determine which parameters are correlated with transplanted kidney status in patients who have undergone kidney transplantation and can be used for early assessment of acute renal rejection. METHODS: The study included 16 patients with stable renal allografts (Group 1) and 37 patients with rejected allografts (Group 2), determined by renal biopsy post transplantation. All patients' kidneys were evaluated using diffusion-weighted MRI (DW-MRI), in which both clincal and MRI-derived biomarkers were integrated...
September 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28936896/fat-fraction-mapping-using-magnetic-resonance-imaging-insight-into-pathophysiology
#10
Timothy J P Bray, Manil D Chouhan, Shonit Punwani, Alan Bainbridge, Margaret A Hall-Craggs
Adipose cells have traditionally been viewed as a simple, passive energy storage depot for triglycerides. However, in recent years it has become clear that adipose cells are highly physiologically active and have a multitude of endocrine, metabolic, haematological and immune functions. Changes in the number or size of adipose cells may be directly implicated in disease (for example, in the metabolic syndrome), but may also be linked to other pathological processes such as inflammation, malignant infiltration or infarction...
September 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28936822/-posterior-reversible-encephalopathy-syndrome-triggerred-by-alcohol-withdrawal
#11
Tuğçe Mengi, Yaprak Seçil, Aysel Çoban, Yeşim Beckmann
INTRODUCTION: Posterior reversible encephalopathy syndrome (PRES) is a clinico-radiological entity characterized by headache, altered mental status, epileptic seizures, visual disturbances and typically transient changes in posterior cerebral circulation areas. In this article, we present a case of alcohol withdrawal accompanied by PRES. CASE PRESENTATION: A 53-year-old male patient presented to the emergency department with visual hallucinations and meaningless speech...
2017: Türk Psikiyatri Dergisi, Turkish Journal of Psychiatry
https://www.readbyqxmd.com/read/28936758/mucinous-cystic-neoplasms-of-the-pancreas-high-resolution-cross-sectional-imaging-features-with-clinico-pathologic-correlation
#12
Alejandro Garces-Descovich, Kevin Beker, Manuel Castillo-Angeles, Alexander Brook, Elena Resnick, Shweta Shinagare, Robert M Najarian, Koenraad J Mortele
PURPOSE: To describe the high-resolution cross-sectional (MDCT/MRI) features of mucinous cystic neoplasms (MCN) of the pancreas with clinico-pathologic correlation; to identify imaging predictors of high-grade dysplasia/carcinoma; and to estimate MCN growth rate. MATERIALS AND METHODS: Thirty-two women (mean age: 46; range, 25-79 years) with resected MCN who underwent preoperative MDCT (n = 20) or MRI (n = 12) examinations over a 14-year period were included...
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936756/clinical-utility-of-mri-brain-in-children-with-non-traumatic-coma
#13
Jatinder Khipal, Naveen Sankhyan, Sunit C Singhi, Pratibha Singhi, Niranjan Khandelwal
OBJECTIVES: To determine characteristics that help identify children with acute encephalopathy who benefit from an MRI (magnetic resonance imaging) of the brain. The secondary objective was to determine the adverse events associated with the MRI procedure. METHODS: In this single center, prospective, observational study. Children (2 mo - 12 y) presenting with impaired consciousness were screened. Those with acute non-traumatic encephalopathy (Glasgow Coma Score of 12 or less) undergoing their first in-patient MRI brain were included...
September 22, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28936611/current-concept-in-upright-spinal-mri
#14
REVIEW
R Botchu, A Bharath, A M Davies, S Butt, S L James
Magnetic resonance imaging (MRI) is the established technique for evaluating the spine. Unfortunately, the supine position of the patient during conventional MRI scanning does not truly reflect the physiological forces experienced by the discoligamentous structures during normal upright posture and ambulation. Upright MRI is a relatively new technique that allows the patient to be scanned in several different weight-bearing positions, which may potentially demonstrate occult pathology not visualised in the supine position...
September 21, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28936607/time-of-flight-mr-angiography-in-cerebral-venous-sinus-thrombosis
#15
Dimitri Renard, Emmanuelle Le Bars, Caroline Arquizan, Nicolas Gaillard, Nicolas Menjot de Champfleur, Isabelle Mourand
Recently, time-of-flight (TOF) and gadolinium-enhanced MR angiography (MRA) imaging have been used to demonstrate subacute intramural hematoma in cervical artery dissection and to detect intraplaque haemorrhage. Our aim was to perform an exploratory study to analyse if venous thrombus-related signal changes (potentially showing iso- or hyperintensity) in cerebral venous sinus thrombosis (CVST) could be observed on 3D-TOF MRA imaging. We analysed retrospectively MRIs of CVST patients in whom both contrast-enhanced MR venography (CEMRV) and 3D-TOF sequences were performed in the acute/subacute phase (i...
September 21, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28936540/-chondral-and-osteochondral-defects-representation-by-imaging-methods
#16
REVIEW
S Nebelung, B Rath, M Tingart, C Kuhl, S Schrading
Morphological imaging of cartilage at high resolution allows the differentiation of chondral and osteochondral lesions. Nowadays, magnetic resonance imaging is the principal diagnostic tool in the assessment of cartilage structure and composition. Conventional radiography, computed tomography, ultrasound or optical coherence tomography are adjunct diagnostic modalities in the assessment of cartilage pathologies. The present article discusses the up-to-date diagnostic practice of cartilage imaging in terms of its scientific basis and current clinical status, requirements, techniques and image interpretation...
September 21, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28936429/clinical-pet-mri-in-neurooncology-opportunities-and-challenges-from-a-single-institution-perspective
#17
REVIEW
Lisbeth Marner, Otto M Henriksen, Michael Lundemann, Vibeke Andrée Larsen, Ian Law
PURPOSE: Magnetic resonance imaging (MRI) plays a key role in neurooncology, i.e., for diagnosis, treatment evaluation and detection of recurrence. However, standard MRI cannot always separate malignant tissue from other pathologies or treatment-induced changes. Advanced MRI techniques such as diffusion-weighted imaging, perfusion imaging and spectroscopy show promising results in discriminating malignant from benign lesions. Further, supplemental imaging with amino acid positron emission tomography (PET) has been shown to increase accuracy significantly and is used routinely at an increasing number of sites...
2017: Clinical and Translational Imaging: Reviews in Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28936285/clinical-and-radiological-outcome-of-arthrocentesis-followed-by-autologous-blood-injection-for-treatment-of-chronic-recurrent-temporomandibular-joint-dislocation
#18
Jinesh Patel, Kumar Nilesh, M I Parkar, Alpesh Vaghasiya
BACKGROUND: This study was conducted to evaluate the functional outcome and MRI findings of arthrocentsis followed by autologous blood injection (ABI) into the joint space for management of chronic recurrent TMJ dislocation. MATERIAL AND METHODS: Total ten patients with bilateral chronic recurrent condylar dislocation were included in the study. Arthrocentesis of both TMJ was performed on each patient, followed by the injection of 2 ml of autologous blood into the superior joint compartment and 1 ml onto the outer surface of the joint capsule...
August 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28936280/enhancing-diffusion-mri-measures-by-integrating-grey-and-white-matter-morphometry-with-hyperbolic-wasserstein-distance
#19
Wen Zhang, Jie Shi, Jun Yu, Liang Zhan, Paul M Thompson, Yalin Wang
In order to improve the preclinical diagnose of Alzheimer's disease (AD), there is a great deal of interest in analyzing the AD related brain structural changes with magnetic resonance image (MRI) analyses. As the major features, variation of the structural connectivity and the cortical surface morphometry provide different views of structural changes to determine whether AD is present on presymptomatic patients. However, the large scale tensor-valued information and relatively low imaging resolution in diffusion MRI (dMRI) have created huge challenges for analysis...
2017: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
https://www.readbyqxmd.com/read/28936092/multifocal-balo-s-concentric-sclerosis-in-children-report-of-a-case-and-review-of-literature
#20
Sanjeev Kumar Bhoi, Suprava Naik, Jayantee Kalita, U K Misra
Balo's concentric sclerosis (BCS) is a rare demyelinating lesion considered to be a variant of multiple sclerosis (MS). On magnetic resonance imaging (MRI) Balo's concentric sclerosis shows the typical concentric pattern. We report a case of 10 year old child with BCS who presented as post infectious acute disseminated encephalomyelitis (ADEM). He is asymptomatic and had no relapse after 6 years of follow-up.
August 2017: Journal of Neurosciences in Rural Practice
keyword
keyword
117815
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"