keyword
MENU ▼
Read by QxMD icon Read
search

Single coil

keyword
https://www.readbyqxmd.com/read/29350091/stent-assisted-coiling-of-cerebral-aneurysms-with-the-neuroform-atlas-stent
#1
Ferdi Cay, Ahmet Peker, Anıl Arat
Objectives The Neuroform Atlas stent (AS) is the smallest intracranial stent with an open-cell design. This study reports the first clinical experience with AS. Methods All intracranial aneurysms treated by stent-assisted coiling using a single AS in a single institution were retrospectively evaluated. Patient demographics, aneurysm characteristics, angles between the parent artery and stented branch, technical success, and clinical and angiographic follow-up were analyzed. Results Fifty-five consecutive aneurysms treated with AS-assisted coiling were included...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29342275/hot-spot-kif5a-mutations-cause-familial-als
#2
David Brenner, Rüstem Yilmaz, Kathrin Müller, Torsten Grehl, Susanne Petri, Thomas Meyer, Julian Grosskreutz, Patrick Weydt, Wolfgang Ruf, Christoph Neuwirth, Markus Weber, Susana Pinto, Kristl G Claeys, Berthold Schrank, Berit Jordan, Antje Knehr, Kornelia Günther, Annemarie Hübers, Daniel Zeller, Christian Kubisch, Sibylle Jablonka, Michael Sendtner, Thomas Klopstock, Mamede de Carvalho, Anne Sperfeld, Guntram Borck, Alexander E Volk, Johannes Dorst, Joachim Weis, Markus Otto, Joachim Schuster, Kelly Del Tredici, Heiko Braak, Karin M Danzer, Axel Freischmidt, Thomas Meitinger, Tim M Strom, Albert C Ludolph, Peter M Andersen, Jochen H Weishaupt
Heterozygous missense mutations in the N-terminal motor or coiled-coil domains of the kinesin family member 5A (KIF5A) gene cause monogenic spastic paraplegia (HSP10) and Charcot-Marie-Tooth disease type 2 (CMT2). Moreover, heterozygous de novo frame-shift mutations in the C-terminal domain of KIF5A are associated with neonatal intractable myoclonus, a neurodevelopmental syndrome. These findings, together with the observation that many of the disease genes associated with amyotrophic lateral sclerosis disrupt cytoskeletal function and intracellular transport, led us to hypothesize that mutations in KIF5A are also a cause of amyotrophic lateral sclerosis...
January 12, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29339838/force-and-scale-dependence-of-the-elasticity-of-self-assembled-dna-bottle-brushes
#3
Márcio Santos Rocha, Ingeborg M Storm, Raniella Falchetto Bazoni, Ésio Bessa Ramos, Armando Hernandez-Garcia, Martien A Cohen Stuart, Frans Leermakers, Renko de Vries
As a model system to study the elasticity of bottle-brush polymers, we here introduce self-assembled DNA bottle brushes, consisting of a DNA main chain that can be very long and still of precisely defined length, and precisely monodisperse polypeptide side chains that are physically bound to the DNA main chains. Polypeptide side chains have a diblock architecture, where one block is a small archaeal nucleoid protein Sso7d that strongly binds to DNA. The other block is a net neutral, hydrophilic random coil polypeptide with a length of exactly 798 amino acids...
January 9, 2018: Macromolecules
https://www.readbyqxmd.com/read/29331948/lvis-blue-as-a-low-porosity-stent-and-coil-adjuvant
#4
Matthew J Koch, Christopher J Stapleton, Scott B Raymond, Susan Williams, Thabele M Leslie-Mazwi, James David Rabinov, Aman B Patel
INTRODUCTION: The LVIS Blue is an FDA-approved stent with 28% metallic coverage that is indicated for use in conjunction with coil embolization for the treatment of intracranial aneurysms. Given a porosity similar to approved flow diverters and higher than currently available intracranial stents, we sought to evaluate the effectiveness of this device for the treatment of intracranial aneurysms. METHODS: We performed an observational single-center study to evaluate initial occlusion and occlusion at 6-month follow-up for patients treated with the LVIS Blue in conjunction with coil embolization at our institution using the modified Raymond-Roy classification (mRRC), where mRRC 1 indicates complete embolization, mRRC 2 persistent opacification of the aneurysm neck, mRRC 3a filling of the aneurysm dome within coil interstices, and mRRC 3b filling of the aneurysm dome...
January 13, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29325952/endovascular-treatment-of-intracranial-aneurysms-concomitant-with-severe-adjacent-atherosclerotic-stenosis
#5
Bu-Lang Gao, Zhao-Shuo Li, Tian-Xiao Li, Jiang-Yu Xue, Guang Feng, Zi-Liang Wang, Wei-Xing Bai, Tong-Yuan Zhao, Xiao-Dong Liang
PURPOSE: To investigate the effect and safety of endovascular treatment of intracranial aneurysms concomitant with severe adjacent atherosclerotic stenosis. MATERIALS AND METHODS: Twenty-six patients with aneurysms and adjacent stenosis were prospectively enrolled. The characteristics of the aneurysm, parent artery, atherosclerotic stenosis and endovascular treatment methods were analyzed. RESULTS: All aneurysms were successfully embolized (100%), with stent-assisted coiling in forteen (53...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29322968/treatment-strategies-for-traumatic-cervico-cranial-pseudoaneurysms-a-single-institution-experience
#6
Ming-Jun Cai, Guo-Zheng Xu, Ming Yang, Lian-Ting Ma, Xin-Jian Yang, Bao-Chang Shi, Jun Li, Li Pan
AIM: Limited clinical and angiographic data exists for patients with traumatic cervico-cerebral pseudoaneurysms. In this paper, we present our limited experience with various management strategies for traumatic cervico-cranial pseudoaneurysms. MATERIALS AND METHODS: We retrospectively analyzed 37 consecutive cases of traumatic pseudoaneurysms involving the cervico-cranial or the cerebral arteries diagnosed at our center from September 2009 to December 2014. The demographic data, etiology, clinical presentation, lesion location, treatment modality, and follow-up outcomes of these patients were reviewed...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29322551/improving-parallel-imaging-by-jointly-reconstructing-multi-contrast-data
#7
Berkin Bilgic, Tae Hyung Kim, Congyu Liao, Mary Kate Manhard, Lawrence L Wald, Justin P Haldar, Kawin Setsompop
PURPOSE: To develop parallel imaging techniques that simultaneously exploit coil sensitivity encoding, image phase prior information, similarities across multiple images, and complementary k-space sampling for highly accelerated data acquisition. METHODS: We introduce joint virtual coil (JVC)-generalized autocalibrating partially parallel acquisitions (GRAPPA) to jointly reconstruct data acquired with different contrast preparations, and show its application in 2D, 3D, and simultaneous multi-slice (SMS) acquisitions...
January 10, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29322298/a-new-microsporidium-fibrillaspora-daphniae-g-n-sp-n-infecting-daphnia-magna-crustacea-cladocera-in-siberia-and-its-taxonomic-placing-within-a-new-family-fibrillasporidae-and-new-superfamily-tubulinosematoidea-opisthosporidia-microsporidia
#8
Anastasia V Simakova, Yuri S Tokarev, Irma V Issi
Infection with a new microsporidium, Fibrillaspora daphniae g. n. sp. n., was found in a local Daphnia magna population in Tomsk region (Western Siberia, Russia) at the prevalence rate of 52%. Histological sections showed parasite cells entirely encompassing the host haemocoel. Methanol-fixed spores were elongate, oval, 4.8 ± 0.3 μm × 2.3 ± 0.2 μm in size. All developmental stages were in direct contact with the host cell cytoplasm, with single nuclei, and division by binary fission. The sporont surface was covered with an additional outer layer composed of fine tubules...
January 10, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29318353/the-barrel-vascular-reconstruction-device-a%C3%A2-retrospective-observational-multicentric-study
#9
C Kabbasch, A Mpotsaris, V Maus, J C Altenbernd, C Loehr
BACKGROUND AND PURPOSE: The Barrel device is an electrolytically detachable laser cut, closed-cell microstent that is used for neck reconstruction in wide-necked bifurcation and branching aneurysms to support coiling. The key feature is a barrel section that herniates over the aneurysmal ostium. The objective was to evaluate the safety, feasibility and the immediate and mid-term occlusion results of this new device. MATERIAL AND METHODS: The databases of two tertiary care centers were screened for all Barrel-based stent-assisted intracranial coil embolization of wide-necked aneurysms between June 2015 and September 2016...
January 9, 2018: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29317468/radiation-exposure-and-procedure-and-fluoroscopy-times-in-endovascular-treatment-of-intracranial-aneurysms-a-methodological-comparison
#10
Nicholas K Cheung, Michelle Boutchard, Michael W Carr, Jens J Froelich
BACKGROUND: Limited data are available for radiation exposure, and procedure and fluoroscopy times in neuroendovascular treatment (NET) strategies. OBJECTIVE: This study establishes and compares related parameters between coil embolization (COIL), balloon assisted coil embolization (BAC), stent assisted coil embolization (SAC), and flow diverting technology (FDT) in NET of intracranial aneurysms. MATERIALS AND METHODS: Between 2010 and 2017, 249 consecutive intracranial aneurysms underwent NET at a single center, all performed by the same operator...
January 9, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29307810/automatic-motion-correction-of-musculoskeletal-mri-using-dslr-camera
#11
Shivaprasad Ashok Chikop, Antharikshanagar Bellappa Sachin Anchan, Girish Koulagi, Arush Arun Honnedevasthana, Shaik Imam, Sairam Geethanath
The purpose of this study is to illustrate motion correction in Musculoskeletal (MSK) Magnetic Resonance Imaging (MRI) through utilization of information from an optical tracker to capture the extent and instant of motion. A Digital Single Lens Reflexive camera is employed as the optical tracker to capture the extent and instant of motion. A checkerboard is utilized as a marker that is placed on the coil. Shift of the checkerboard provides the extent of motion, which is captured by camera and is used for motion correction in (MSK)-MRI images...
January 4, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29283346/phased-array-focusing-for-acoustic-wireless-power-transfer
#12
Victor Farm-Guoo Tseng, Sarah S Bedair, Nathan Lazarus
Wireless power transfer (WPT) through acoustic waves can achieve higher efficiencies than inductive coupling when the distance is above several times the transducer size. This paper demonstrates the use of ultrasonic phased arrays to focus power to receivers at arbitrary locations to increase the power transfer efficiency. Using a phased array consisting of 37 elements at a distance nearly 5 times the receiver transducer diameter, a factor of 2.6 increase in efficiency was achieved when compared to a case equivalent to a single large transducer with the same peak efficiency distance...
January 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29281751/the-nb-lrr-gene-pm60-confers-powdery-mildew-resistance-in-wheat
#13
Shenghao Zou, Huan Wang, Yiwen Li, Zhaosheng Kong, Dingzhong Tang
Powdery mildew is one of the most devastating diseases of wheat. To date, few powdery mildew resistance genes have been cloned from wheat due to the size and complexity of the wheat genome. Triticum urartu is the progenitor of the A genome of wheat and is an important source for powdery mildew resistance genes. Using molecular markers designed from scaffolds of the sequenced T. urartu accession and standard map-based cloning, a powdery mildew resistance locus was mapped to a 356-kb region, which contains two nucleotide-binding and leucine-rich repeat domain (NB-LRR) protein-encoding genes...
December 27, 2017: New Phytologist
https://www.readbyqxmd.com/read/29280211/radial-magnetic-resonance-imaging-mri-using-a-rotating-radiofrequency-rf-coil-at-9-4%C3%A2-t
#14
Mingyan Li, Ewald Weber, Jin Jin, Thimo Hugger, Yasvir Tesiram, Peter Ullmann, Simon Stark, Miguel Fuentes, Sven Junge, Feng Liu, Stuart Crozier
The rotating radiofrequency coil (RRFC) has been developed recently as an alternative approach to multi-channel phased-array coils. The single-element RRFC avoids inter-channel coupling and allows a larger coil element with better B1 field penetration when compared with an array counterpart. However, dedicated image reconstruction algorithms require accurate estimation of temporally varying coil sensitivities to remove artefacts caused by coil rotation. Various methods have been developed to estimate unknown sensitivity profiles from a few experimentally measured sensitivity maps, but these methods become problematic when the RRFC is used as a transceiver coil...
December 27, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29277952/a-tale-of-two-cases-of-pulmonary-arteriovenous-malformation-how-they-fared-after-cardiac-transplantation
#15
Bethany L Wisotzkey, Dari L Magyar, Thomas K Jones, Robert J Boucek, Lester C Permut, Mariska S Kemna, Yuk M Law
BACKGROUND: In single ventricle patients, aorticopulmonary collaterals (APCs) and pulmonary arteriovenous malformations (PAVMs) following superior cavopulmonary shunt (CPS) can complicate orthotopic heart transplant (OHT) by cyanosis and hemoptysis. Though PAVMs can regress with restoration of hepatic venous flow to the pulmonary circulation, the effects of hypoxemia on the "unconditioned" allograft are not known. CASES: Two patients with significant PAVMs after CPS were cyanotic following OHT...
December 26, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/29274425/chemical-characterization-and-wound-healing-property-of-a-%C3%AE-d-glucan-from-edible-mushroom-piptoporus-betulinus
#16
Liana Inara de Jesus, Fhernanda R Smiderle, Andrea C Ruthes, Francisco Vilaplana, Fernando Tonholi Dal, Daniele Maria-Ferreira, Maria Fernanda Werner, Leo J L D Van Griensven, Marcello Iacomini
A water-soluble β-D-glucan was obtained from fruiting bodies of Piptoporus betulinus, by hot aqueous extraction followed by freeze-thawing procedure and dialysis. Its molar mass distribution and conformational behavior in solution was assessed by size-exclusion chromatography, showing a polysaccharide with an average molecular weight of 2.5 × 105 Da with a random coil conformation for molecular weights below 1 × 106 Da. Typical signals of β-(1 → 3)-linkages were observed in NMR spectrum (δ 102...
December 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29251569/wet-spun-biofiber-for-torsional-artificial-muscles
#17
Azadeh Mirabedini, Shazed Aziz, Geoffrey M Spinks, Javad Foroughi
The demands for new types of artificial muscles continue to grow and novel approaches are being enabled by the advent of new materials and novel fabrication strategies. Self-powered actuators have attracted significant attention due to their ability to be driven by elements in the ambient environment such as moisture. In this study, we demonstrate the use of twisted and coiled wet-spun hygroscopic chitosan fibers to achieve a novel torsional artificial muscle. The coiled fibers exhibited significant torsional actuation where the free end of the coiled fiber rotated up to 1155 degrees per mm of coil length when hydrated...
December 2017: Soft Robotics
https://www.readbyqxmd.com/read/29251491/glycosylation-promotes-random-coil-to-helix-transition-in-a-region-of-a-protist-skp1-associated-with-f-box-binding
#18
Xianzhong Xu, Alexander Eletsky, M Osman Sheikh, James H Prestegard, Christopher M West
Cullin-Ring-Ligases mediate protein polyubiquitination, a signal for degradation in the 26S-proteasome. The CRL1 class consists of Skp1/cullin-1/F-box protein/Rbx1 (SCF) complexes that cyclically associate with ubiquitin-E2 to build the polyubiquitin chain. Within the SCF complex, the 162-amino acid DdSkp1 from Dictyostelium bridges cullin-1 with an F-box protein (FBP), the specificity factor for substrate selection. The hydroxylation-dependent glycosylation of Pro143 of DdSkp1 by a pentasaccharide forms the basis of a novel O2-sensing mechanism in the social amoeba Dictyostelium and other protists...
December 18, 2017: Biochemistry
https://www.readbyqxmd.com/read/29250856/simultaneous-bilateral-knee-mr-imaging
#19
Feliks Kogan, Evan Levine, Akshay S Chaudhari, Uchechukwuka D Monu, Kevin Epperson, Edwin H G Oei, Garry E Gold, Brian A Hargreaves
PURPOSE: To demonstrate and evaluate the scan time and quantitative accuracy of simultaneous bilateral-knee imaging compared with single-knee acquisitions. METHODS: Hardware modifications and safety testing was performed to enable MR imaging with two 16-channel flexible coil arrays. Noise covariance and sensitivity-encoding g-factor maps for the dual-coil-array configuration were computed to evaluate coil cross-talk and noise amplification. Ten healthy volunteers were imaged on a 3T MRI scanner with both dual-coil-array bilateral-knee and single-coil-array single-knee configurations...
December 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29245144/the-myorobot-a-novel-automated-biomechatronics-system-to-assess-voltage-ca2-biosensors-and-active-passive-biomechanics-in-muscle-and-biomaterials
#20
M Haug, B Reischl, G Prölß, C Pollmann, T Buckert, C Keidel, S Schürmann, M Hock, S Rupitsch, M Heckel, T Pöschel, T Scheibel, C Haynl, L Kiriaev, S I Head, O Friedrich
We engineered an automated biomechatronics system, MyoRobot, for robust objective and versatile assessment of muscle or polymer materials (bio-)mechanics. It covers multiple levels of muscle biosensor assessment, e.g. membrane voltage or contractile apparatus Ca2+ ion responses (force resolution 1µN, 0-10mN for the given sensor; [Ca2+] range ~ 100nM-25µM). It replaces previously tedious manual protocols to obtain exhaustive information on active/passive biomechanical properties across various morphological tissue levels...
December 7, 2017: Biosensors & Bioelectronics
keyword
keyword
12201
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"