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https://www.readbyqxmd.com/read/29325691/predictors-of-recurrent-sprains-after-an-index-lateral-ankle-sprain-a-longitudinal-study
#1
Fereshteh Pourkazemi, Claire E Hiller, Jacqueline Raymond, Deborah Black, Elizabeth J Nightingale, Kathryn M Refshauge
OBJECTIVE: To explore and identify the predictors of ankle sprain after an index (first) lateral ankle sprain. DESIGN: Prospective cohort study, Level of evidence II. SETTING: Musculoskeletal research laboratory at the University of Sydney. PARTICIPANTS: A sample of convenience (70 controls, 30 with an index sprain) was recruited. METHODS: Potential predictors of ankle sprain were measured including: demographic measures, perceived ankle instability, ankle joint ligamentous laxity, passive range of ankle motion, balance, proprioception, motor planning and control, and inversion/eversion peak power...
November 2, 2017: Physiotherapy
https://www.readbyqxmd.com/read/29315667/collision-free-poisson-motion-planning-in-ultra-high-dimensional-molecular-conformation-spaces
#2
Rasmus Fonseca, Dominik Budday, Henry van den Bedem
The function of protein, RNA, and DNA is modulated by fast, dynamic exchanges between three-dimensional conformations. Conformational sampling of biomolecules with exact and nullspace inverse kinematics, using rotatable bonds as revolute joints and noncovalent interactions as holonomic constraints, can accurately characterize these native ensembles. However, sampling biomolecules remains challenging owing to their ultra-high dimensional configuration spaces, and the requirement to avoid (self-) collisions, which results in low acceptance rates...
January 5, 2018: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29304901/indoor-tanning-a-gianus-bifrons-vitamin-d-and-human-cancer
#3
Giuseppe Lippi, Gianfranco Cervellin, Elisa Danese
Despite it is now undeniable that indoor tanning exposure is associated with a number of skin cancers, its favorable effects on vitamin D status may bear some underestimated and currently unexplored health benefits. Vitamin D is a fat-soluble vitamin naturally present in a limited number of foods, the concentration of which largely depends on ultraviolet (UV) B sources exposure in humans. A strong, graded, and inverse association has been documented between serum vitamin D and the risk of developing certain types of malignancy, especially colorectal, breast, lung, bladder, and kidney cancers...
2018: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/29302896/comparison-of-the-accuracy-of-noninvasive-hemoglobin-monitoring-for-preoperative-evaluation-between-adult-and-pediatric-patients-a-retrospective-study
#4
Yong-Hee Park, Seho Lim, Hyun Kang, Hwa-Yong Shin, Chong Wha Baek, Young Cheol Woo
We measured noninvasive hemoglobin (SpHb) levels during the pre-anesthesia visit in patients planning elective surgery. Differences between SpHb and laboratory-measured hemoglobin (Hblab) were compared between adult and pediatric patients. In the pre-anesthesia visiting office, we routinely monitor noninvasive Hb levels with oxygen saturation and heart rate using Masimo Radical-7® Pulse CO-Oximetry (Masimo Corp., Irvine, CA, USA). We attached the R1 20 (body weight, 10-50 kg) or R1 25 (body weight > 30 kg) probe on the index finger...
January 4, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29298256/planning-for-bone-excision-in-ewing-sarcoma-post-chemotherapy-mri-more-accurate-than-pre-chemotherapy-mri-assessment
#5
Camille Thévenin-Lemoine, Louise Destombes, Julie Vial, Matthieu Wargny, Paul Bonnevialle, Yan Lefevre, Anne Gomez Brouchet, Jérome Sales de Gauzy
BACKGROUND: In determining the level of bone resection in Ewing sarcoma, the most suitable time at which to perform magnetic resonance imaging (MRI) remains controversial. Current guidelines recommend that surgical planning be based on MRI performed prior to neoadjuvant chemotherapy. The goal of this study was to determine whether pre-chemotherapy or post-chemotherapy MRI provides greater accuracy of tumor limits for planning bone excision in the management of Ewing sarcoma. METHODS: This was a single-center, retrospective study...
January 3, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29274951/correlation-between-the-posterior-mandibular-width-and-the-lingual-gap-caused-by-symphyseal-fractures-using-a-virtual-model
#6
Christian Pedemonte Trewhela, Andrea Carmona Avendaño, Edgardo González Mora, Ilich Vargas Farren, Francisco Lopetegui Caceres, Erick Rojas Quiroz
PURPOSE: The objective was to determine the dimensional impact, on the occlusal and articular level, of the gap produced in the lingual plate from symphyseal fractures, correlated with the dimensional change in the posterior mandibular width. MATERIALS AND METHODS: We performed an observational experimental study based on 30 computed tomography scans of patients treated by the Maxillofacial Surgery Service, Hospital Clínico Mutual de Seguridad, Santiago, Chile, between 2012 and 2016...
December 7, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29250134/image-fusion-of-ct-and-mr-with-sparse-representation-in-nsst-domain
#7
Chenhui Qiu, Yuanyuan Wang, Huan Zhang, Shunren Xia
Multimodal image fusion techniques can integrate the information from different medical images to get an informative image that is more suitable for joint diagnosis, preoperative planning, intraoperative guidance, and interventional treatment. Fusing images of CT and different MR modalities are studied in this paper. Firstly, the CT and MR images are both transformed to nonsubsampled shearlet transform (NSST) domain. So the low-frequency components and high-frequency components are obtained. Then the high-frequency components are merged using the absolute-maximum rule, while the low-frequency components are merged by a sparse representation- (SR-) based approach...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/29249954/an-extended-passive-motion-paradigm-for-human-like-posture-and-movement-planning-in-redundant-manipulators
#8
Paolo Tommasino, Domenico Campolo
A major challenge in robotics and computational neuroscience is relative to the posture/movement problem in presence of kinematic redundancy. We recently addressed this issue using a principled approach which, in conjunction with nonlinear inverse optimization, allowed capturing postural strategies such as Donders' law. In this work, after presenting this general model specifying it as an extension of the Passive Motion Paradigm, we show how, once fitted to capture experimental postural strategies, the model is actually able to also predict movements...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29248876/associations-between-adjuvant-radiotherapy-and-different-causes-of-death-in-a-german-breast-cancer-cohort
#9
Nadia Obi, Christine Eulenburg, Petra Seibold, Ursula Eilber, Kathrin Thöne, Sabine Behrens, Jenny Chang-Claude, Dieter Flesch-Janys
BACKGROUND: Studies of cohorts of breast cancer (BC) patients diagnosed before 1990 showed radiotherapy (RT) to be associated with increased cardiovascular (CVD) and lung cancer mortality many years after diagnosis. In the late 1990s, improvements in RT planning techniques reduced radiation doses to normal tissues. Recent studies did not consistently report higher RT-related mortality for CVD and second cancers. Aim of the study was to analyze specific causes of death after 3D-conformal RT in a recent BC cohort...
December 14, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/29243101/fractures-in-a-nationwide-population-based-cohort-of-users-of-breast-cancer-hormonal-therapy
#10
Joan M Neuner, Yushu Shi, Amanda L Kong, Sailaja Kamaraju, Elizabeth C Smith, Alicia J Smallwood, Purushottam W Laud, John A Charlson
PURPOSE: Although users of aromatase inhibitors have higher total fracture risk in some randomized trials, little is known about their risk outside of clinical trials or in older higher-risk cohorts. METHODS: In a population-based retrospective cohort study, we identified all older US Medicare D prescription drug insurance plan-enrolled women who had initial breast cancer surgery in 2006-2008 and began hormonal therapy (an aromatase inhibitor (AI) or tamoxifen) within the subsequent year...
December 15, 2017: Journal of Cancer Survivorship: Research and Practice
https://www.readbyqxmd.com/read/29233593/anterior-mediastinal-tissue-volume-is-correlated-with-antiacetylcholine-receptor-antibody-level-in-myasthenia-gravis
#11
Akihiro Takahagi, Mitsugu Omasa, Toyofumi F Chen-Yoshikawa, Masatsugu Hamaji, Akihiko Yoshizawa, Takashi Sozu, Makoto Sonobe, Hiroshi Date
OBJECTIVES: Extended thymectomy is a treatment option for myasthenia gravis (MG), but the surgical indications are controversial. Pathologic features of the thymus can be used to predict surgical outcomes, but there is no reliable method for evaluating these characteristics preoperatively. The purpose of this study was to determine whether anterior mediastinal tissue volume, as measured via 3-dimensional computed tomography (3DCT) volumetry, correlates with serum anti-acetylcholine receptor antibody (AChRAb) levels in patients undergoing thymectomy for myasthenia gravis...
November 8, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29228098/association-of-household-opioid-availability-and-prescription-opioid-initiation-among-household-members
#12
Marissa J Seamans, Timothy S Carey, Daniel J Westreich, Stephen R Cole, Stephanie B Wheeler, G Caleb Alexander, Virginia Pate, M Alan Brookhart
Importance: Increases in prescription opioid use in the United States have been attributed to changing prescribing guidelines and attitudes toward pain relief; however, the spread of opioid use within households through drug diversion may also be a contributing factor. Objective: To investigate whether individuals living in a household with a prescription opioid user are more likely to initiate prescription opioids themselves, compared with individuals in households with a prescription nonsteroidal anti-inflammatory drug (NSAID) user...
December 11, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/29218841/improvement-of-conformal-arc-plans-by-using-deformable-margin-delineation-method-for-stereotactic-lung-radiotherapy
#13
Görkem Güngör, Melek Demir, Gökhan Aydın, Bülent Yapıcı, Banu Atalar, Enis Özyar
PURPOSE: Stereotactic body radiotherapy (SBRT) is an established treatment technique in the management of medically inoperable early stage non-small cell lung cancer (NSCLC). Different techniques such as volumetric modulated arc (VMAT) and three-dimensional conformal arc (DCA) can be used in SBRT. Previously, it has been shown that VMAT is superior to DCA technique in terms of plan evaluation parameters. However, DCA technique has several advantages such as ease of use and considerable shortening of the treatment time...
December 7, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29207827/to-evaluate-the-correlation-between-skeletal-and-dental-parameters-to-the-amount-of-crowding-in-class-ii-div-1-malocclusions
#14
Shivani Singh, G Shivaprakash
Introduction: Crowding of teeth is one of the most common problem that motivates the patient to seek orthodontic treatment. Determination of etiology of crowding could have a significant effect on treatment planning and prognosis of Class II malocclusion. Aim: Aim of this study was to evaluate the relationship of skeletal and dental parameters to amount of dental crowding in patients with Class II Divison 1 (div.1) malocclusion. Materials and Methods: Pretreatment lateral cephalograms and dental casts of 60 patients with skeletal Class II malocclusion were collected for the study...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29204531/axillary-lymph-node-coverage-with-3-dimensional-tangential-field-irradiation-and-correlation-with-heart-and-lung-dose
#15
Geraldine Jacobson, Nicole Bunda-Randall, Sijin Wen, Matthew Miller
Purpose: The American College of Surgeons Oncology Group Z0011 trial indicated no benefit from axillary lymph node (LN) dissection after a positive sentinel LN biopsy in patients receiving breast irradiation, suggesting that level I-II LNs were covered in tangential fields. Methods and materials: We evaluated 50 computed tomography-based tangential breast plans and contoured level I-III axillary LNs using the Radiation Therapy Oncology Group guidelines. The volumes of level I-III LN regions covered by 90% and 95% of the prescription dose (PD) were calculated and correlated with the V20 ipsilateral lung and mean heart dose...
October 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29203149/improved-rectal-dosimetry-with-the-use-of-spaceoar-during-high-dose-rate-brachytherapy
#16
Susan Y Wu, Lauren Boreta, Ashley Wu, Joey P Cheung, J Adam M Cunha, Katsuto Shinohara, Albert J Chang
PURPOSE: Hydrogel spacers have been suggested to limit rectal radiation dose with improvements in clinical outcomes in patients undergoing external beam radiation treatment for prostate cancer. No studies to date have assessed the utility and dosimetric effect of SpaceOAR (Augmenix, Inc, Waltham, MA), the only Food and Drug Administration-approved hydrogel rectal spacer, for high-dose-rate (HDR) brachytherapy. METHODS: Eighteen consecutive patients scheduled for HDR brachytherapy in the treatment of prostate cancer underwent transperineal ultrasound-guided placement of 10 cc of SpaceOAR hydrogel following catheter implantation...
December 1, 2017: Brachytherapy
https://www.readbyqxmd.com/read/29191470/optimal-beam-margins-in-linac-based-vmat-stereotactic-ablative-body-radiotherapy-a-pareto-front-analysis-for-liver-metastases
#17
Savino Cilla, Anna Ianiro, Francesco Deodato, Gabriella Macchia, Cinzia Digesù, Vincenzo Valentini, Alessio G Morganti
We explored the Pareto fronts mathematical strategy to determine the optimal block margin and prescription isodose for stereotactic body radiotherapy (SBRT) treatments of liver metastases using the volumetric-modulated arc therapy (VMAT) technique. Three targets (planning target volumes [PTVs] = 20, 55, and 101 cc) were selected. A single fraction dose of 26 Gy was prescribed (prescription dose [PD]). VMAT plans were generated for 3 different beam energies. Pareto fronts based on (1) different multileaf collimator (MLC) block margin around PTV and (2) different prescription isodose lines (IDL) were produced...
November 27, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29181557/a-tailored-multicomponent-program-to-reduce-discomfort-in-critically-ill-patients-a-cluster-randomized-controlled-trial
#18
Pierre Kalfon, Karine Baumstarck, Philippe Estagnasie, Marie-Agnès Geantot, Audrey Berric, Georges Simon, Bernard Floccard, Thomas Signouret, Mohamed Boucekine, Mélanie Fromentin, Martine Nyunga, Achille Sossou, Marion Venot, René Robert, Arnaud Follin, Juliette Audibert, Anne Renault, Maïté Garrouste-Orgeas, Olivier Collange, Quentin Levrat, Isabelle Villard, Didier Thevenin, Julien Pottecher, René-Gilles Patrigeon, Nathalie Revel, Coralie Vigne, Elie Azoulay, Olivier Mimoz, Pascal Auquier
PURPOSE: Critically ill patients are exposed to stressful conditions and experience several discomforts. The primary objective was to assess whether a tailored multicomponent program is effective for reducing self-perceived discomfort. METHODS: In a cluster-randomized two-arm parallel trial, 34 French adult intensive care units (ICUs) without planned interventions to reduce discomfort were randomized, 17 to the arm including a 6-month period of program implementation followed by a 6-month period without the program (experimental group), and 17 to the arm with an inversed sequence (control group)...
November 27, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/29180703/comparison-of-graphical-optimization-or-ipsa-for-improving-brachytheraphy-plans-associated-with-inadequate-target-coverage-for-cervical-cancer
#19
ZhiJie Liu, HuanQing Liang, Xiao Wang, HaiMing Yang, Ye Deng, TingJun Luo, ChaoFeng Yang, Min Lu, QingGuo Fu, XiaoDong Zhu
Many studies have reported that inverse planning by simulated annealing (IPSA) can improve the quality of brachytherapy plans, and we wanted to examine whether IPSA could improve cervical cancer brachytherapy plans giving D90 < 6 Gy (with 7 Gy per fraction) at our institution. Various IPSA plans involving the tandem and ovoid applicators were developed for 30 consecutive cervical cancer patients on the basis of computed tomography: IPSA1, with a constraint on the maximum dose in the target volume; IPSA1-0, identical to IPSA1 but without a dwell-time deviation constraint; IPSA2, without a constraint on the maximum dose; and IPSA2-0, identical to IPSA2 but without a dwell-time deviation constraint...
November 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29176059/multi-gpu-configuration-of-4d-intensity-modulated-radiation-therapy-inverse-planning-using-global-optimization
#20
Aaron Michael Hagan, Amit Sawant, Michael Folkerts, Arezoo Modiri
We report on the design, implementation and characterization of a multi-graphic processing unit (GPU) computational platform for higher-order optimization in radiotherapy treatment planning. In collaboration with a commercial vendor (Varian Medical Systems, Palo Alto, CA), a research prototype GPU-enabled Eclipse (V13.6) workstation was configured. The hardware consisted of dual 8-core xeon processors, 256 GB RAM and four NVIDIA Tesla K80 general purpose GPUs. We demonstrate the utility of this platform for large radiotherapy optimization problems through the development and characterization of a parallelized particle swarm optimization (PSO) four dimensional (4D) intensity modulated radiation therapy (IMRT) technique...
November 23, 2017: Physics in Medicine and Biology
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