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https://www.readbyqxmd.com/read/28520778/texture-analysis-using-proton-density-and-t2-relaxation-in-patients-with-histological-usual-interstitial-pneumonia-uip-or-nonspecific-interstitial-pneumonia-nsip
#1
Maria T A Buzan, Andreas Wetscherek, Claus Peter Heussel, Michael Kreuter, Felix J Herth, Arne Warth, Hans-Ulrich Kauczor, Carmen Monica Pop, Julien Dinkel
OBJECTIVES: The purpose of our study was to assess proton density (PD) and T2 relaxation time of usual interstitial pneumonia (UIP) and nonspecific interstitial pneumonia (NSIP) and to evaluate their utility in differentiating the two patterns. Furthermore, we aim to investigate whether these two parameters could help differentiate active-inflammatory and stable-fibrotic lesions in NSIP. METHODS: 32 patients (mean age: 69 years; M:F, 1:1) with pathologically proven disease (UIP:NSIP, 1:1), underwent thoracic thin-section multislice CT scan and 1...
2017: PloS One
https://www.readbyqxmd.com/read/28513854/verification-of-dose-profiles-generated-by-the-convolution-algorithm-of-the-gamma-knife-%C3%A2-radiosurgery-planning-system
#2
Hyun-Tai Chung, Jeong-Hoon Park, Kook Jin Chun
PURPOSE: A convolution algorithm that takes into account electron-density inhomogeneity was recently introduced to calculate dose distributions for the Gamma Knife (GK) Perfexion(™) treatment planning program. The accuracies of the dose distributions computed using the convolution method were assessed using an anthropomorphic phantom and film dosimetry. METHODS: Absorbed-dose distributions inside a phantom (CIRS Radiosurgery Head Phantom, Model 605) were calculated using the convolution method of the GK treatment-planning software (Leksell Gamma Plan(®) version 10...
May 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28498713/improved-sensing-with-a-single-qubit
#3
P Sekatski, M Skotiniotis, W Dür
We consider quantum metrology with arbitrary prior knowledge of the parameter. We demonstrate that a single sensing two-level system can act as a virtual multilevel system that offers increased sensitivity in a Bayesian single-shot metrology scenario, and that allows one to estimate (arbitrary) large parameter values by avoiding phase wraps. This is achieved by making use of additional degrees of freedom or auxiliary systems not participating in the sensing process. The joint system is manipulated by intermediate control operations in such a way that an effective Hamiltonian, with an arbitrary spectrum, is generated that mimics the spectrum of a multisystem interacting with the field...
April 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28494892/postoperative-analgesic-efficacy-of-single-shot-and-continuous-transversus-abdominis-plane-block-after-laparoscopic-cholecystectomy-a-randomized-controlled-clinical-trial
#4
Yun-Mi Choi, Gyeong-Jo Byeon, Soon-Ji Park, Young-Min Ok, Sang-Wook Shin, Kwangho Yang
STUDY OBJECTIVE: To compare the analgesic efficacy of ultrasound-guided single-shot and continuous transversus abdominis plane (TAP) block to that of IV-PCA in patients undergoing laparoscopic cholecystectomy. DESIGN: Prospective randomized controlled trial. SETTING: Post-anesthesia care unit and General ward. PATIENTS: 108 American Society of Anesthesiologist (ASA) physical status I-II patients undergoing laparoscopic cholecystectomy...
June 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28494088/peripheral-nerve-blocks-for-hip-fractures
#5
REVIEW
Joanne Guay, Martyn J Parker, Richard Griffiths, Sandra Kopp
BACKGROUND: Various nerve blocks with local anaesthetic agents have been used to reduce pain after hip fracture and subsequent surgery. This review was published originally in 1999 and was updated in 2001, 2002, 2009 and 2017. OBJECTIVES: This review focuses on the use of peripheral nerves blocks as preoperative analgesia, as postoperative analgesia or as a supplement to general anaesthesia for hip fracture surgery. We undertook the update to look for new studies and to update the methods to reflect Cochrane standards...
May 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28486339/acute-effect-of-upper-and-lower-body-postactivation-exercises-on-shot-put-performance
#6
Eleni I Kontoy, Fani Berberidou, Theophilos C Pilianidis, Nikolaos I Mantzouranis, Spyridon K Methenitis
The purpose of the present study was to investigate the effect of different types of upper and lower' extremities exercises on acute increase of shot put performance, in moderate experienced throwers. Eight (n=8) males and nine (n=9) female throwers participated in the present study. Their bench press and squat maximum strength were measured while their shot put performance from power position was evaluated before and after four interventions: [1] plyometric push-ups (Plyo), [2] 6s isometric push-ups (Iso), [3] 3 countermovement jumps (CMJ) and [4] 10 reps...
May 10, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28479257/liposomal-bupivacaine-versus-indwelling-interscalene-nerve-block-for-postoperative-pain-control-in-shoulder-arthroplasty-a-prospective-randomized-controlled-trial
#7
Jeffrey T Abildgaard, Keith T Lonergan, Stefan J Tolan, Michael J Kissenberth, Richard J Hawkins, Richard Washburn, Kyle J Adams, Catherine D Long, E Carlisle Shealy, Jay R Motley, John M Tokish
BACKGROUND: Pain management strategies following shoulder arthroplasty vary significantly. Liposomal bupivacaine (LB) is an extended-release delivery of a phospholipid bilayer encapsulating bupivacaine that can result in drug delivery up to 72 hours. Prior studies in lower extremity surgery demonstrated efficacy of LB in comparison to a single-shot peripheral nerve block; however, no study has investigated LB in a total shoulder arthroplasty population. Therefore, this study compared LB vs...
May 4, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28479181/carbohydrate-fatty-acid-monosulphate-esters-are-safe-and-effective-adjuvants-for-humoral-responses
#8
Luuk A Th Hilgers, Peter Paul L I Platenburg, Jeffrey Bajramovic, Jennifer Veth, Robert Sauerwein, Will Roeffen, Marie Pohl, Geert van Amerongen, Koert J Stittelaar, Johannes F van den Bosch
Carbohydrate fatty acid sulphate esters (CFASEs) formulated in a squalane-in-water emulsion are effective adjuvants for humoral responses to a wide range of antigens in various animal species but rise in body temperature and local reactions albeit mild or minimal hampers application in humans. In rabbits, body temperature increased 1°C one day after intramuscular (IM) injection, which returned to normal during the next day. The effect increased with increasing dose of CFASE but not with the number of injections (up to 5)...
May 31, 2017: Vaccine
https://www.readbyqxmd.com/read/28474275/comparison-of-mono-and-bipolar-radiofrequency-ablation-in-benign-thyroid-disease
#9
Yücel Korkusuz, Alexander Mader, Daniel Gröner, Shadi Ahmad, Oscar Maximilian Mader, Frank Grünwald, Christian Happel
PURPOSE: Radiofrequency ablation (RFA) is an approved minimal invasive method for the treatment of benign thyroid nodules. Several experimental, mainly ex vivo animal studies have compared the effectiveness of different RFA procedures in liver tissue. The aim of this retrospective clinical study was to evaluate the difference between monopolar and bipolar RFA in thyroid tissue considering thyroid volume reduction, patient discomfort and ultrasound evaluation. METHODS: Eighteen patients with symptomatic complex benign thyroid nodules were treated in a single RFA session...
May 4, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28470792/super-resolution-intracranial-quiescent-interval-slice-selective-magnetic-resonance-angiography
#10
Ioannis Koktzoglou, Robert R Edelman
PURPOSE: To evaluate the combination of nonenhanced quiescent-interval slice-selective (QISS) magnetic resonance angiography (MRA) with super-resolution reconstruction for portraying the intracranial arteries. METHODS: The intracranial arteries of seven volunteers were imaged at 3T using QISS MRA acquired with a flow-compensated fast low-angle shot (FLASH) readout and thin overlapping slices. The impacts of super-resolution reconstruction and various acquisition parameters on the delineation of intracranial arteries were quantified using four metrics: arterial-to-background contrast-to-noise ratio (CNR), arterial-to-background contrast, arterial sharpness, and arterial full-width-at-half-maximum (FWHM)...
May 3, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28456223/polarizers-optical-bridges-and-sagnac-interferometers-for-nanoradian-polarization-rotation-measurements
#11
A C H Rowe, I Zhaksylykova, G Dilasser, Y Lassailly, J Peretti
The ability to measure nanoradian polarization rotations, θF, in the photon shot noise limit is investigated for partially crossed polarizers (PCP), a static Sagnac interferometer, and an optical bridge, each of which can in principle be used in this limit with near equivalent figures-of-merit (FOM). In practice a bridge to PCP/Sagnac source noise rejection ratio of 1/4θF(2) enables the bridge to operate in the photon shot noise limit even at high light intensities. The superior performance of the bridge is illustrated via the measurement of a 3 nrad rotation arising from an axial magnetic field of 0...
April 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28452534/first-demonstration-of-electrostatic-damping-of-parametric-instability-at-advanced-ligo
#12
Carl Blair, Slawek Gras, Richard Abbott, Stuart Aston, Joseph Betzwieser, David Blair, Ryan DeRosa, Matthew Evans, Valera Frolov, Peter Fritschel, Hartmut Grote, Terra Hardwick, Jian Liu, Marc Lormand, John Miller, Adam Mullavey, Brian O'Reilly, Chunnong Zhao, B P Abbott, T D Abbott, C Adams, R X Adhikari, S B Anderson, A Ananyeva, S Appert, K Arai, S W Ballmer, D Barker, B Barr, L Barsotti, J Bartlett, I Bartos, J C Batch, A S Bell, G Billingsley, J Birch, S Biscans, C Biwer, R Bork, A F Brooks, G Ciani, F Clara, S T Countryman, M J Cowart, D C Coyne, A Cumming, L Cunningham, K Danzmann, C F Da Silva Costa, E J Daw, D DeBra, R DeSalvo, K L Dooley, S Doravari, J C Driggers, S E Dwyer, A Effler, T Etzel, T M Evans, M Factourovich, H Fair, A Fernández Galiana, R P Fisher, P Fulda, M Fyffe, J A Giaime, K D Giardina, E Goetz, R Goetz, C Gray, K E Gushwa, E K Gustafson, R Gustafson, E D Hall, G Hammond, J Hanks, J Hanson, G M Harry, M C Heintze, A W Heptonstall, J Hough, K Izumi, R Jones, S Kandhasamy, S Karki, M Kasprzack, S Kaufer, K Kawabe, N Kijbunchoo, E J King, P J King, J S Kissel, W Z Korth, G Kuehn, M Landry, B Lantz, N A Lockerbie, A P Lundgren, M MacInnis, D M Macleod, S Márka, Z Márka, A S Markosyan, E Maros, I W Martin, D V Martynov, K Mason, T J Massinger, F Matichard, N Mavalvala, R McCarthy, D E McClelland, S McCormick, G McIntyre, J McIver, G Mendell, E L Merilh, P M Meyers, R Mittleman, G Moreno, G Mueller, J Munch, L K Nuttall, J Oberling, P Oppermann, Richard J Oram, D J Ottaway, H Overmier, J R Palamos, H R Paris, W Parker, A Pele, S Penn, M Phelps, V Pierro, I Pinto, M Principe, L G Prokhorov, O Puncken, V Quetschke, E A Quintero, F J Raab, H Radkins, P Raffai, S Reid, D H Reitze, N A Robertson, J G Rollins, V J Roma, J H Romie, S Rowan, K Ryan, T Sadecki, E J Sanchez, V Sandberg, R L Savage, R M S Schofield, D Sellers, D A Shaddock, T J Shaffer, B Shapiro, P Shawhan, D H Shoemaker, D Sigg, B J J Slagmolen, B Smith, J R Smith, B Sorazu, A Staley, K A Strain, D B Tanner, R Taylor, M Thomas, P Thomas, K A Thorne, E Thrane, C I Torrie, G Traylor, G Vajente, G Valdes, A A van Veggel, A Vecchio, P J Veitch, K Venkateswara, T Vo, C Vorvick, M Walker, R L Ward, J Warner, B Weaver, R Weiss, P Weßels, B Willke, C C Wipf, J Worden, G Wu, H Yamamoto, C C Yancey, Hang Yu, Haocun Yu, L Zhang, M E Zucker, J Zweizig
Interferometric gravitational wave detectors operate with high optical power in their arms in order to achieve high shot-noise limited strain sensitivity. A significant limitation to increasing the optical power is the phenomenon of three-mode parametric instabilities, in which the laser field in the arm cavities is scattered into higher-order optical modes by acoustic modes of the cavity mirrors. The optical modes can further drive the acoustic modes via radiation pressure, potentially producing an exponential buildup...
April 14, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28451954/incidental-findings-in-cardiac-magnetic-resonance-imaging-superiority-of-bssfp-over-t1w-haste-for-extra-cardiac-findings-assessment
#13
Jan M Sohns, Jan Menke, Alexander Schwarz, Leonard Bergau, Johannes T Kowallick, Andreas Schuster, Frank Konietschke, Marius Placzek, Desiree Weiberg, Stefan Nordlohne, Sebastian Schmuck, Sebastian Schulz, Thorsten Derlin, Wieland Staab
Incidental findings are frequent in radiological examinations and may have an impact on further patient management. The aim of this retrospective study was to analyze, which of two thoracic scout sequences is more suitable for detecting incidental extra-cardiac findings at cardiac magnetic resonance imaging (CMRI) with stress perfusion. During a 14-month period clinically indicated stress perfusion CMRI was performed in 97 consecutive patients. For anatomical orientation ECG-triggered (electrocardiography) T1w-Half-fourier acquisition single-shot turbo spin-echo (HASTE) and balanced steady state free precession (bSSFP) sequences were performed for planning the standard cardiac sequences...
April 27, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28451144/photochemical-pump-and-nmr-probe-to-monitor-the-formation-and-kinetics-of-hyperpolarized-metal-dihydrides
#14
Barbara Procacci, Pedro M Aguiar, Meghan E Halse, Robin N Perutz, Simon B Duckett
On reaction of IrI(CO)(PPh3)21 with para-hydrogen (p-H2), Ir(H)2I(CO)(PPh3)22 is formed which exhibits strongly enhanced (1)H NMR signals for its hydride resonances. Complex 2 also shows similar enhancement of its NMR spectra when it is irradiated under p-H2. We report the use of this photochemical reactivity to measure the kinetics of H2 addition by laser-synchronized reactions in conjunction with NMR. The single laser pulse promotes the reductive elimination of H2 from Ir(H)2I(CO)(PPh3)22 in C6D6 solution to form the 16-electron precursor 1, back reaction with p-H2 then reforms 2 in a well-defined nuclear spin-state...
December 1, 2016: Chemical Science
https://www.readbyqxmd.com/read/28450064/a-paradoxical-response-of-the-rat-organism-to-long-term-inhalation-of-silica-containing-submicron-predominantly-nanoscale-particles-of-a-collected-industrial-aerosol-at-realistic-exposure-levels
#15
Marina P Sutunkova, Svetlana N Solovyeva, Boris A Katsnelson, Vladimir B Gurvich, Larisa I Privalova, Ilzira A Minigalieva, Tatyana V Slyshkina, Irene E Valamina, Oleg H Makeyev, Vladimir Ya Shur, Ilya V Zubarev, Dmitry K Kuznetsov, Ekaterina V Shishkina
While engineered SiO2 nanoparticle toxicity is being widely investigated, mostly on cell lines or in acute animal experiments, the practical importance of as well as the theoretical interest in industrial condensation aerosols with a high SiO2 particle content seems to be neglected. That is why, to the best of our knowledge, long-term inhalation exposure to nano-SiO2 has not been undertaken in experimental nanotoxicology studies. To correct this data gap, female white rats were exposed for 3 or 6 months 5 times a week, 4h a day to an aerosol containing predominantly submicron (nanoscale included) particles of amorphous silica at an exposure concentration of 2...
April 24, 2017: Toxicology
https://www.readbyqxmd.com/read/28438666/how-to-choose-the-right-mr-sequence-for-your-research-question-at-7-t-and-above
#16
José P Marques, David G Norris
The choice of a pulse sequence at ultra-high field can be influenced by a number of considerations and constraints that are not always the same as those at lower fields. Foremost amongst these is of course the information required and the time available, but considerations of static main field- and transmit field- inhomogeneities as well as power deposition can also play an important role. In this review we first briefly examine the characteristics of high field MRI, and then describe the performance and constraints relevant to the major imaging readouts, and their implementation with parallel imaging techniques...
April 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/28437940/rydberg-atom-based-radio-frequency-electrometry-using-frequency-modulation-spectroscopy-in-room-temperature-vapor-cells
#17
Santosh Kumar, Haoquan Fan, Harald Kübler, Akbar J Jahangiri, James P Shaffer
Rydberg atom-based electrometry enables traceable electric field measurements with high sensitivity over a large frequency range, from gigahertz to terahertz. Such measurements are particularly useful for the calibration of radio frequency and terahertz devices, as well as other applications like near field imaging of electric fields. We utilize frequency modulated spectroscopy with active control of residual amplitude modulation to improve the signal to noise ratio of the optical readout of Rydberg atom-based radio frequency electrometry...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28433852/efficiency-of-low-versus-high-airline-pressure-in-stunning-cattle-with-a-pneumatically-powered-penetrating-captive-bolt-gun
#18
Steffan Edward Octávio Oliveira, Neville George Gregory, Filipe Antonio Dalla Costa, Troy John Gibson, Mateus José Rodrigues Paranhos da Costa
The efficiency of stunning cattle was assessed in 443 animals (304 pure Zebu and 139 crossbred cattle), being mainly mature bulls and cows. Cattle were stunned using a Jarvis pneumatically powered penetrating captive bolt gun operating with low (160-175psi, N=82) and high (190psi, N=363) airline pressure, which was within the manufactures specifications. Signs of brain function and the position of the shots on the heads were recorded after stunning. Velocity of the captive bolt and its physical parameters were calculated...
August 2017: Meat Science
https://www.readbyqxmd.com/read/28424822/rapid-non-contrast-magnetic-resonance-imaging-for-post-appendectomy-intra-abdominal-abscess-in-children
#19
Megan H Lee, Eric P Eutsler, Elizabeth F Sheybani, Geetika Khanna
BACKGROUND: Acute appendicitis, especially if perforated at presentation, is often complicated by postoperative abscess formation. The detection of a postoperative abscess relies primarily on imaging. This has traditionally been done with contrast-enhanced computed tomography. Non-contrast magnetic resonance imaging (MRI) has the potential to accurately detect intra-abdominal abscesses, especially with the use of diffusion-weighted imaging (DWI). OBJECTIVE: To evaluate our single-center experience with a rapid non-contrast MRI protocol evaluating post-appendectomy abscesses in children with persistent postsurgical symptoms...
April 20, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28403398/systematic-review-of-the-systemic-concentrations-of-local-anaesthetic-after-transversus-abdominis-plane-block-and-rectus-sheath-block
#20
J Rahiri, J Tuhoe, D Svirskis, N J Lightfoot, P B Lirk, A G Hill
Background.: Safe and efficacious modalities of perioperative analgesia are essential for enhanced recovery after surgery. Truncal nerve blocks are one potential adjunct for analgesia of the abdominal wall, and in recent years their popularity has increased. Transversus abdominis plane block (TAPB) and rectus sheath block (RSB) have been shown to reduce morphine consumption and improve pain relief after abdominal surgery. These blocks typically require large volumes of local anaesthetic (LA)...
April 1, 2017: British Journal of Anaesthesia
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