keyword
MENU ▼
Read by QxMD icon Read
search

mri contrast

keyword
https://www.readbyqxmd.com/read/28749553/myelopathy-in-beh%C3%A3-et-s-disease-the-bagel-sign
#1
Ugur Uygunoglu, Burcu Zeydan, Yesim Ozguler, Serdal Ugurlu, Emire Seyahi, Naci Kocer, Civan Islak, Kejal Kantarci, Sabahattin Saip, Aksel Siva, Orhun H Kantarci
OBJECTIVE: To describe the clinical and distinctive imaging features of myelopathy associated with Behçet's disease. METHODS: We evaluated the records of patients meeting the following criteria: a) fulfillment of the International Study Group criteria for Behçet's disease; b) clinically suggestive of myelopathy; c) simultaneous spinal cord and brain MRIs within 1 month of acute worsening of myelopathy; d) follow-up duration ≥1 year after initial MRI evaluation...
July 27, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28749173/assessment-of-sacroiliitis-for-the-diagnosis-of-spondyloarthropathy-fat-saturated-t2-weighted-imaging-with-stir-versus-fat-saturated-contrast-enhanced-t1-weighted-imaging
#2
Siyoun Sung, Hyun Su Kim, Jong Won Kwon
OBJECTIVES: To evaluate whether there is significant differences between contrastenhanced fat-saturated T1-weighted imaging and non-enhanced fat-suppression imaging for diagnosing sacroiliitis in patients with inflammatory back pain. METHODS: Ninety-two patients, consisting of 46 men and 46 women (mean age: 34 years; range: 15-63 years), who met at least four out of five Assessment in SpondyloArthritis international Society (ASAS) criteria for inflammatory low back pain were enrolled in this study...
July 27, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28749166/ablative-safety-margin-depicted-by-fusion-imaging-with-post-treatment-contrast-enhanced-ultrasound-and-pre-treatment-cect-cemri-after-radiofrequency-ablation-for-liver-cancers
#3
Xiao-Wan Bo, Hui-Xiong Xu, Le-Hang Guo, Li-Ping Sun, Xiao-Long Li, Chong-Ke Zhao, Ya-Ping He, Bo-Ji Liu, Dan-Dan Li, Kun Zhang, Dan Wang
OBJECTIVES: To evaluate the value of fusion imaging with post-treatment contrast-enhanced ultrasound (CEUS) and pre-treatment contrast-enhanced computed tomography/magnetic resonance imaging (CECT/CEMRI) in evaluating ablative safety margin after percutaneous ultrasound (US)-guided radiofrequency ablation (RFA) for liver cancers. METHODS: 34 consecutive patients with 47 liver lesions who had undergone RFA were included. Fusion imaging with post-treatment CEUS and pre-treatment CECT/CEMRI was carried out to evaluate local treatment response and ablative safety margin within 1-3 days after RFA...
July 27, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28749094/superiority-of-ultrasound-guided-shamrock-lumbar-plexus-block
#4
Martin V Nielsen, Thomas F Bendtsen, Jens Børglum
BACKGROUND: Ultrasound-guided lumbar plexus block performed with the Shamrock approach has received much interest since the technique was first described in 2013. The technique is believed to be faster and easier to perform and possibly safer in regards to potential complications compared with other lumbar plexus blocks. METHODS: In order to outline some favorable characteristics of the Shamrock lumbar plexus block, we performed an exhaustive search of the current literature; even though it is rather limited...
July 26, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28748562/visualization-of-macrophage-recruitment-in-head-and-neck-carcinoma-model-using-fluorine-19-magnetic-resonance-imaging
#5
Aman Khurana, Fanny Chapelin, Hongyan Xu, Joseph R Acevedo, Alfred Molinolo, Quyen Nguyen, Eric T Ahrens
PURPOSE: To evaluate the role of infiltrating macrophages in murine models of single and double mutation head and neck tumors using a novel fluorine-19 ((19) F) MRI technology. METHODS: Tumor cell lines single-hit/SCC4 or double-hit/Cal27, with mutations of TP53 and TP53 & FHIT, respectively, were injected bilaterally into the flanks of (n = 10) female mice. With tumors established, perfluorocarbon nanoemulsion was injected intravenously, which labels in situ predominantly monocytes and macrophages...
July 26, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28748393/the-validate29-mri-based-multi-channel-atlas-of-the-squirrel-monkey-brain
#6
Kurt G Schilling, Yurui Gao, Iwona Stepniewska, Tung-Lin Wu, Feng Wang, Bennett A Landman, John C Gore, Li Min Chen, Adam W Anderson
We describe the development of the first digital atlas of the normal squirrel monkey brain and present the resulting product, VALiDATe29. The VALiDATe29 atlas is based on multiple types of magnetic resonance imaging (MRI) contrast acquired on 29 squirrel monkeys, and is created using unbiased, nonlinear registration techniques, resulting in a population-averaged stereotaxic coordinate system. The atlas consists of multiple anatomical templates (proton density, T1, and T2* weighted), diffusion MRI templates (fractional anisotropy and mean diffusivity), and ex vivo templates (fractional anisotropy and a structural MRI)...
July 26, 2017: Neuroinformatics
https://www.readbyqxmd.com/read/28747731/dynamical-sensitivity-control-of-a-single-spin-quantum-sensor
#7
Andrii Lazariev, Silvia Arroyo-Camejo, Ganesh Rahane, Vinaya Kumar Kavatamane, Gopalakrishnan Balasubramanian
The Nitrogen-Vacancy (NV) defect in diamond is a unique quantum system that offers precision sensing of nanoscale physical quantities at room temperature beyond the current state-of-the-art. The benchmark parameters for nanoscale magnetometry applications are sensitivity, spectral resolution, and dynamic range. Under realistic conditions the NV sensors controlled by conventional sensing schemes suffer from limitations of these parameters. Here we experimentally show a new method called dynamical sensitivity control (DYSCO) that boost the benchmark parameters and thus extends the practical applicability of the NV spin for nanoscale sensing...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747522/pet-imaging-stability-measurements-during-simultaneous-pulsing-of-aggressive-mr-sequences-on-the-ge-signa-pet-mr
#8
Timothy W Deller, Mohammad Mehdi Khalighi, Floris P Jansen, Gary H Glover
The recent introduction of simultaneous whole-body PET/MR scanners has enabled new research taking advantage of the complementary information obtainable with PET and MR imaging. One such application is kinetic modeling, which requires high levels of PET quantitative stability. This challenges the task of isolating the two imaging subsystems from mutual interference. Performance measurements have previously been published demonstrating sufficient PET stability in the presence of MR pulsing for typical clinical use; however, PET stability during radiofrequency (RF)-intensive and gradient-intensive sequences has not previously been evaluated for a clinical whole-body scanner...
July 26, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28747182/recurrent-primary-mediastinal-giant-cell-tumor-of-soft-tissue-with-radiological-findings-a-rare-case-report-and-literature-review
#9
Qiongjie Hu, Jian Peng, Liming Xia
BACKGROUND: Giant cell tumor of soft tissue (GCT-ST), which histologically resembles GCT of bone, is a rare tumor. Usually, it is located in the lower extremities and trunk. GCT-ST, occurring in mediastinum, is extremely rare. CASE PRESENTATION: We encountered an 18-year-old Chinese woman who had mild dull pain on the left side of back. The following chest computed tomography (CT) showed a heterogeneous mass deeply situated in the posterior mediastinum with compression of the lung and invasion of the adjacent rib...
July 26, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28746206/association-between-relative-liver-enhancement-on-gadoxetic-acid-enhanced-magnetic-resonance-images-and-histologic-grade-of-hepatocellular-carcinoma
#10
Young-Joo Jin, Soon Gu Cho, Kun Young Lee, Joon Mee Kim, Jin Woo Lee
We evaluated the association between histologic grade of hepatocellular carcinoma (HCC) and degree of HCC enhancement on Gd-EOB-DTPA (Gadoxetic acid, Primovist)-enhanced magnetic resonance images (MRI) in HCC patients.A total of 121 patients who underwent curative surgical resection for HCC at our institution between January 2012 and March 2015 were retrospectively analyzed. Gadoxetic acid enhanced MRI was performed in all patients before surgery. Signal intensities of HCC and peri-HCC areas were measured using regions of interest...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28746187/research-of-cerebral-activation-in-uygur-speaking-and-chinese-speaking-participants-during-verb-generation-task-with-functional-magnetic-resonance-imaging
#11
Yanling Xi, Ling Liu, Grace Hao, Zulipinuer Abudusadike, Chunhui Jiang, Junran Zhang, Baolan Wang
The aims are to investigate and compare the activated cerebral regions of Uygur-speaking and Chinese-speaking participants during verb generation task.A total of 31 cases of Uygur and 28 cases of Han healthy volunteers were enrolled. They were requested to take verb generation tasks. Blood oxygenation level-dependent functional magnetic resonance imaging (BOLD-fMRI) was performed. The fMRI images were collected and activated brain regions were analyzed.In Chinese-speaking participants, the main activated cerebral regions were as follows: the left caudate nucleus, the left occipital gyrus, the left fusiform gyrus, bilateral supplementary motor area (BA8/ 6), the left BA32, left precuneus, the left superior parietal lobule, the left inferior parietal lobule (BA7), the left angular gyrus, the right side of the central gyrus (BA9), the left inferior frontal gyrus triangular section, the right pars opercularis gyri frontalis inferiorista, and bilateral cerebellum...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28745808/hypophysitis-panhypopituitarism-and-hypothalamitis-in-a-scottish-terrier-dog
#12
L Polledo, M Oliveira, J Adamany, P Graham, K Baiker
A 6-year old male neutered Scottish Terrier was referred with a 1 week history of progressive lethargy and anorexia. Neurological examination localized a lesion to the forebrain and hormonal testing showed panhypopituitarism. Magnetic resonance imaging (MRI) of the brain revealed a rounded, well-defined, suprasellar central mass. The mass was slightly hyperintense to the cortical grey matter on T2-weighted (T2W), hypointense on T1-weighted (T1W) images and without T2* signal void. There was a central fusiform enhancement of the mass after contrast administration which raised the suspicion of a pituitary neoplasm...
July 26, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28745775/a-highly-stable-l-alanine-based-mono-aquated-mn-ii-complex-as-a-t1-weighted-mri-contrast-agent
#13
Mahmuda Khannam, Thomas Weyhermüller, Upashi Goswami, Chandan Mukherjee
The synthesized lithium (S)-6,6'-(1-carboxyethylazanediyl)bis(methylene)dipicolinate (Li3cbda) is a new chiral, alanine-based ligand bearing two picolinate functionalities. The trianionic form of the ligand [(cbda)(3-)] constitutes a seven-coordinate, water-soluble, pentagonal bipyramidal Mn(ii) complex (1). The structural analysis reveals the presence of a water coordinating site in the complex. The complex is thermodynamically very stable, and the stability is not affected by the presence of physiological anions (HCO3(-), PO4(3-), and F(-))...
July 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28745755/molecular-engineering-of-lanthanide-ion-chelating-phospholipids-generating-assemblies-with-a-switched-magnetic-susceptibility
#14
Stéphane Isabettini, Sarah Massabni, Arnel Hodzic, Dzana Durovic, Joachim Kohlbrecher, Takashi Ishikawa, Peter Fischer, Erich J Windhab, Peter Walde, Simon Kuster
Lanthanide ion (Ln(3+)) chelating amphiphiles are powerful molecules for tailoring the magnetic response of polymolecular assemblies. Mixtures of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and 1,2-dimyristoyl-sn-glycero-3-phospho-ethanolamine-diethylene triaminepentaacetate (DMPE-DTPA) complexed to Ln(3+) deliver highly magnetically responsive bicelles. Their magnetic properties are readily tuned by changing the bicellar size or the magnetic susceptibility Δχ of the bilayer lipids. The former technique is intrinsically bound to the region of the phase diagram guarantying the formation of bicelles...
July 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28744842/the-quantitative-structural-and-compositional-analyses-of-degenerating-intervertebral-discs-using-magnetic-resonance-imaging-and-contrast-enhanced-micro-computed-tomography
#15
Kevin H Lin, Simon Y Tang
The intervertebral disc (IVD) is susceptible to degenerative changes that are associated with low back pain. Murine models are often used to investigate the mechanistic changes in the development, aging, and diseased states of the IVD, yet the detection of early degenerative changes in structure is challenging because of the minute size of the murine IVDs. Histology is the gold standard for examining the IVD structure, but it is susceptible to sectioning artifacts, spatial biases, and requires the destructive preparation of the sample...
July 25, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28744784/modeling-left-ventricular-blood-flow-using-smoothed-particle-hydrodynamics
#16
Andrés Caballero, Wenbin Mao, Liang Liang, John Oshinski, Charles Primiano, Raymond McKay, Susheel Kodali, Wei Sun
This study aims to investigate the capability of smoothed particle hydrodynamics (SPH), a fully Lagrangian mesh-free method, to simulate the bulk blood flow dynamics in two realistic left ventricular (LV) models. Three dimensional geometries and motion of the LV, proximal left atrium and aortic root are extracted from cardiac magnetic resonance imaging and multi-slice computed tomography imaging data. SPH simulation results are analyzed and compared with those obtained using a traditional finite volume-based numerical method, and to in vivo phase contrast magnetic resonance imaging and echocardiography data, in terms of the large-scale blood flow phenomena usually clinically measured...
July 25, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28744689/pediatric-cerebellar-giant-cavernous-malformation-case-report-and-review-of-literature
#17
Javier Villaseñor-Ledezma, Marcelo Budke, Juan-Antonio Alvarez-Salgado, María-Angeles Cañizares, Luis Moreno, Francisco Villarejo
BACKGROUND AND IMPORTANCE: Giant cavernous malformations (GCM) are low flow, angiographically occult vascular lesions, with a diameter >4 cm. Cerebellar GCMs are extremely rare, with only seven cases reported based on English literature. These lesions are most commonly seen in the pediatric age group, which is known to have an increased risk of hemorrhage, being surgery clearly recommended. CLINICAL PRESENTATION: An 18-month-old girl presented with a 6-month history of cervical torticollis and upper extremities clumsiness...
July 25, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28743460/high-resolution-in-vivo-imaging-of-human-locus-coeruleus-by-magnetization-transfer-mri-at-3t-and-7t
#18
Nikos Priovoulos, Heidi I L Jacobs, Dimo Ivanov, Kamil Uludag, Frans R J Verhey, Benedikt A Poser
Locus Coeruleus (LC) is a neuromelanin-rich brainstem structure that is the source of noradrenaline in the cortex and is thought to modulate attention and memory. LC imaging in vivo is commonly performed with a 2D T1-weighted Turbo Spin Echo (TSE) MRI sequence, an approach that suffers from several drawbacks at 3T, including long acquisition times and highly anisotropic spatial resolution. In this study, we developed a high-resolution Magnetization Transfer (MT) sequence for LC imaging at both 7T and 3T and compared its performance to a TSE sequence...
July 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/28743240/whole-brain-radiotherapy-versus-stereotactic-radiosurgery-for-4-10-brain-metastases-a-phase-iii-randomised-multicentre-trial
#19
Jaap D Zindler, Anna M E Bruynzeel, Daniëlle B P Eekers, Coen W Hurkmans, Ans Swinnen, Philippe Lambin
BACKGROUND: Maintenance of quality of life is the primary goal during treatment of brain metastases (BM). This is a protocol of an ongoing phase III randomised multicentre study. This study aims to determine the exact additional palliative value of stereotactic radiosurgery (SRS) over whole brain radiotherapy (WBRT) in patients with 4-10 BM. METHODS: The study will include patients with 4-10 BM from solid primary tumours diagnosed on a high-resolution contrast-enhanced MRI scan with a maximum lesional diameter of 2...
July 25, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28742373/utility-of-mri-to-differentiate-clear-cell-renal-cell-carcinoma-adrenal-metastases-from-adrenal-adenomas
#20
Nicola Schieda, Satheesh Krishna, Matthew D F McInnes, Bardia Moosavi, Abdulmohsen Alrashed, Robert Moreland, Evan S Siegelman
OBJECTIVE: The purpose of this study is to compare MRI features of clear cell renal cell carcinoma (RCC) adrenal metastases and adenomas. MATERIALS AND METHODS: Fifteen clear cell RCC adrenal metastases imaged with MRI were compared to 29 consecutive adenomas between 2006 and 2015. Two blinded radiologists assessed homogeneity (homogeneous vs heterogeneous), signal intensity (SI) decrease on chemical-shift MRI, and T2-weighted SI (isointense, mildly hyperintense, or markedly hyperintense) relative to muscle...
July 25, 2017: AJR. American Journal of Roentgenology
keyword
keyword
113265
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"