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https://www.readbyqxmd.com/read/28548921/repeatability-testing-of-a-new-hybrid-iii-6-year-old-atd-lower-extremity
#1
Laura C Boucher, Yeonsu Ryu, Yun-Seok Kang, John H Bolte
OBJECTIVE: Vehicle safety is improving, thus decreasing the number of life-threatening injuries and increasing the need for research in other areas of the body. The current child anthropomorphic test device (ATD) does not have the capabilities or instrumentation to measure many of the potential interactions between the lower extremity and the vehicle interior. A prototype Hybrid III 6-year-old ATD lower extremity (ATD-LE) was developed and contains a tibia load cell and a more biofidelic ankle...
May 29, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28525476/magnetic-resonance-classification-system-of-cervical-intervertebral-disk-degeneration-its-validity-and-meaning
#2
Akinobu Suzuki, Michael D Daubs, Tetsuo Hayashi, Monchai Ruangchainikom, Chenjie Xiong, Kevin Phan, Trevor P Scott, Jeffery C Wang
STUDY DESIGN: Retrospective analysis of kinetic magnetic resonance images (kMRIs). OBJECTIVE: (1) To analyze the changes seen on MRI related to disk degeneration and to develop a new grading system for cervical disk degeneration. (2) To evaluate the reliability and validity of the grading system. SUMMARY OF BACKGROUND DATA: Few have studied the relationship between changes seen on MRI with cervical disk degeneration and the chronological order of disk degeneration...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28507458/effect-of-tumor-amplitude-and-frequency-on-4d-modeling-of-vero4drt-system
#3
Hideharu Miura, Shuichi Ozawa, Masahiro Hayata, Shintaro Tsuda, Kiyoshi Yamada, Yasushi Nagata
BACKGROUND: An important issue in indirect dynamic tumor tracking with the Vero4DRT system is the accuracy of the model predictions of the internal target position based on surrogate infrared (IR) marker measurement. We investigated the predictive uncertainty of 4D modeling using an external IR marker, focusing on the effect of the target and surrogate amplitudes and periods. METHODS: A programmable respiratory motion table was used to simulate breathing induced organ motion...
July 2017: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/28502021/the-visual-and-haptic-contributions-to-hand-perception
#4
Lara A Coelho, Claudia Lr Gonzalez
Previous research has found that the perception of our hands is distorted. The characteristics of this distortion are an overestimation of hand width and an underestimation of finger length. The present study examined the role that different sensory modalities (vision and/or haptics) play in the perception of our hands. Participants pointed to their concealed hand in one of three groups: Vision+Haptics, Vision-only, or Haptics-only. Participants in the Vision+Haptics group had vision (non-informative) of the experimental setup and of the pointing hand, but no vision of the hand being estimated...
May 13, 2017: Psychological Research
https://www.readbyqxmd.com/read/28489651/the-impact-of-cervical-musculoskeletal-disorders-on-uk-consultant-plastic-surgeons-can-we-reduce-morbidity-with-applied-ergonomics
#5
Yvette Godwin, Christopher R Macdonald, Sarbjit Kaur, Li Zhelin, Christopher Baber
BACKGROUND: Based on anecdotal and observational evidence, we hypothesized that the prevalence of cervical musculoskeletal disorder (C-MSD) would be high among plastic surgeons. A questionnaire review was undertaken to test this hypothesis. Ergonomic assessment was undertaken to assess causal factors of C-MSD. METHOD: An anonymous questionnaire recording demographics, physical symptoms and behavioral responses to C-MSD was distributed to UK Plastic Surgery consultants...
June 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28429148/an-observational-time-and-motion-study-of-denosumab-subcutaneous-injection-and-zoledronic-acid-intravenous-infusion-in-patients-with-metastatic-bone-disease-results-from-three-european-countries
#6
Jean-Jacques Body, Francesca Gatta, Erwin De Cock, Sunning Tao, Persefoni Kritikou, Pauline Wimberger, Jeroen Mebis, Marc Peeters, Paolo Pedrazzoli, Augusto Caraceni, Vincenzo Adamo, Guy Hechmati
PURPOSE: Denosumab (administered via subcutaneous injection) demonstrated superior efficacy versus the intravenously administered zoledronic acid in the prevention of skeletal-related events in an integrated analysis of three head-to-head phase III trials in patients with bone metastases secondary to solid tumors. To date, no studies have evaluated treatment administration duration endpoints of these two agents. METHODS: A multinational, multi-site, observational time and motion study conducted in 10 day oncology units (DOUs) across Belgium, Germany, and Italy...
April 21, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28360852/self-organized-behavior-generation-for-musculoskeletal-robots
#7
Ralf Der, Georg Martius
With the accelerated development of robot technologies, control becomes one of the central themes of research. In traditional approaches, the controller, by its internal functionality, finds appropriate actions on the basis of specific objectives for the task at hand. While very successful in many applications, self-organized control schemes seem to be favored in large complex systems with unknown dynamics or which are difficult to model. Reasons are the expected scalability, robustness, and resilience of self-organizing systems...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28297435/simple-quality-assurance-method-of-dynamic-tumor-tracking-with-the-gimbaled-linac-system-using-a-light-field
#8
Hideharu Miura, Shuichi Ozawa, Masahiro Hayata, Shintaro Tsuda, Kiyoshi Yamada, Yasushi Nagata
We proposed a simple visual method for evaluating the dynamic tumor tracking (DTT) accuracy of a gimbal mechanism using a light field. A single photon beam was set with a field size of 30×30 mm2 at a gantry angle of 90°. The center of a cube phantom was set up at the isocenter of a motion table, and 4D modeling was performed based on the tumor and infrared (IR) marker motion. After 4D modeling, the cube phantom was replaced with a sheet of paper, which was placed perpendicularly, and a light field was projected on the sheet of paper...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28291934/electromagnetic-tracking-emt-technology-for-improved-treatment-quality-assurance-in-interstitial-brachytherapy
#9
Markus Kellermeier, Jens Herbolzheimer, Stephan Kreppner, Michael Lotter, Vratislav Strnad, Christoph Bert
Electromagnetic Tracking (EMT) is a novel technique for error detection and quality assurance (QA) in interstitial high dose rate brachytherapy (HDR-iBT). The purpose of this study is to provide a concept for data acquisition developed as part of a clinical evaluation study on the use of EMT during interstitial treatment of breast cancer patients. The stability, accuracy, and precision of EMT-determined dwell positions were quantified. Dwell position reconstruction based on EMT was investigated on CT table, HDR table and PDR bed to examine the influence on precision and accuracy in a typical clinical workflow...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28256025/development-of-allocentric-spatial-recall-from-new-viewpoints-in-virtual-reality
#10
James Negen, Edward Heywood-Everett, Hannah E Roome, Marko Nardini
Using landmarks and other scene features to recall locations from new viewpoints is a critical skill in spatial cognition. In an immersive virtual reality task, we asked children 3.5-4.5 years old to remember the location of a target using various cues. On some trials they could use information from their own self-motion. On some trials they could use a view match. In the very hardest kind of trial, they were 'teleported' to a new viewpoint and could only use an allocentric spatial representation. This approach provides a strict test for allocentric coding (without either a matching viewpoint or self-motion information) while avoiding additional task demands in previous studies (it does not require them to deal with a small table-top environment or to manage stronger cue conflicts)...
March 2, 2017: Developmental Science
https://www.readbyqxmd.com/read/28243999/physiological-effects-of-early-incremental-mobilization-of-a-patient-with-acute-intracerebral-and-intraventricular-hemorrhage-requiring-dual-external-ventricular-drainage
#11
Sowmya Kumble, Elizabeth K Zink, Mackenzie Burch, Sandra Deluzio, Robert D Stevens, Mona N Bahouth
BACKGROUND: Recent trials have challenged the notion that very early mobility benefits patients with acute stroke. It is unclear how cerebral autoregulatory impairments, prevalent in this population, could be affected by mobilization. The safety of mobilizing patients who have external ventricular drainage (EVD) devices for cerebrospinal fluid diversion and intracranial pressure (ICP) monitoring is another concern due to risk of device dislodgment and potential elevation in ICP. We report hemodynamic and ICP responses during progressive, device-assisted mobility interventions performed in a critically ill patient with intracerebral hemorrhage (ICH) requiring two EVDs...
February 27, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28242957/shake-table-testing-of-an-elevator-system-in-a-full-scale-five-story-building
#12
Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P Conte, José I Restrepo, Matthew S Hoehler, Waldir Ribeiro
This paper investigates the seismic performance of a functional traction elevator as part of a full-scale five-story building shake table test program. The test building was subjected to a suite of earthquake input motions of increasing intensity, first while the building was isolated at its base, and subsequently while it was fixed to the shake table platen. In addition, low-amplitude white noise base excitation tests were conducted while the elevator system was placed in three different configurations, namely, by varying the vertical location of its cabin and counterweight, to study the acceleration amplifications of the elevator components due to dynamic excitations...
March 2017: Earthquake Engineering & Structural Dynamics
https://www.readbyqxmd.com/read/28239605/low-dimensional-synergistic-representation-of-bilateral-reaching-movements
#13
Martin K Burns, Vrajeshri Patel, Ionut Florescu, Kishore V Pochiraju, Ramana Vinjamuri
Kinematic and neuromuscular synergies have been found in numerous aspects of human motion. This study aims to determine how effectively kinematic synergies in bilateral upper arm movements can be used to replicate complex activities of daily living (ADL) tasks using a sparse optimization algorithm. Ten right-handed subjects executed 18 rapid and 11 natural-paced ADL tasks requiring bimanual coordination while sitting at a table. A position tracking system was used to track the subjects' arms in space, and angular velocities over time for shoulder abduction, shoulder flexion, shoulder internal rotation, and elbow flexion for each arm were computed...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28218455/experimental-evaluation-of-magnified-haptic-feedback-for-robot-assisted-needle-insertion-and-palpation
#14
Leonardo Meli, Claudio Pacchierotti, Domenico Prattichizzo
BACKGROUND: Haptic feedback has been proven to play a key role in enhancing the performance of teleoperated medical procedures. However, due to safety issues, commercially-available medical robots do not currently provide the clinician with haptic feedback. METHODS: This work presents the experimental evaluation of a teleoperation system for robot-assisted medical procedures able to provide magnified haptic feedback to the clinician. Forces registered at the operating table are magnified and provided to the clinician through a 7-DoF haptic interface...
February 20, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28210341/a-multidisciplinary-investigation-of-the-effects-of-competitive-state-anxiety-on-serve-kinematics-in-table-tennis
#15
Vuong Ngo, Hugh Richards, Miran Kondric
Displays of anxiety in table tennis were assessed through subjective (a self-report questionnaire), physiological (heart-rate variability) and kinematic variables. Using a within-group crossover design, 9 university-level table tennis players completed a series of serves under low- and high-anxiety conditions. Anxiety manipulation was achieved through the introduction of a national standard table tennis player, known to the participants, to receive serves in the high-anxiety condition, whilst serves were received by no opponent in the low-anxiety condition...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210337/extraction-of-knowledge-from-the-topographic-attentive-mapping-network-and-its-application-in-skill-analysis-of-table-tennis
#16
Isao Hayashi, Masanori Fujii, Toshiyuki Maeda, Jasmin Leveille, Tokio Tasaka
The Topographic Attentive Mapping (TAM) network is a biologically-inspired classifier that bears similarities to the human visual system. In case of wrong classification during training, an attentional top-down signal modulates synaptic weights in intermediate layers to reduce the difference between the desired output and the classifier's output. When used in a TAM network, the proposed pruning algorithm improves classification accuracy and allows extracting knowledge as represented by the network structure...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210336/effect-of-changing-table-tennis-ball-material-from-celluloid-to-plastic-on-the-post-collision-ball-trajectory
#17
Yuki Inaba, Sho Tamaki, Haruhiko Ikebukuro, Koshi Yamada, Hiroki Ozaki, Kazuto Yoshida
The official material used in table tennis balls was changed from celluloid to plastic, a material free of celluloid, in 2014. The purpose of this study was to understand the differences and similarities in the two types of ball materials by comparing their behavior upon collision with a table. The behavior of the balls before and after collision with a table, at various initial speeds ranging from 15 to 115 km/h, was captured using high-speed cameras. Velocities and spin rates before collision and velocities after collision were computed to calculate the coefficients of restitution and friction...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28203602/hamstring-contracture-after-acl-reconstruction-is-associated-with-an-increased-risk-of-cyclops-syndrome
#18
Francisco Guerra Pinto, Mathieu Thaunat, Matt Daggett, Charles Kajetanek, Tiago Marques, Tales Guimares, Bénédicte Quelard, Bertrand Sonnery-Cottet
BACKGROUND: Cyclops syndrome is characterized by loss of terminal knee extension due to proliferative fibrous nodule formation in the intercondylar notch. This complication occurs in the early postoperative period after anterior cruciate ligament reconstruction (ACLR). The pathogenesis of Cyclops syndrome is not well understood. HYPOTHESIS: Persistent hamstring contracture after ACLR is associated with an increased risk of subsequent Cyclops syndrome. STUDY DESIGN: Case-control study; Level of evidence, 3...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28197849/effect-of-myofascial-techniques-for-treatment-of-upper-limb-dysfunctions-in-breast-cancer-survivors-randomized-controlled-trial
#19
An De Groef, Marijke Van Kampen, Nele Verlvoesem, Evi Dieltjens, Lore Vos, Tessa De Vrieze, Marie-Rose Christiaens, Patrick Neven, Inge Geraerts, Nele Devoogdt
PURPOSE: Besides pain, myofascial dysfunctions may contribute to the presence of upper limb impairments such as impaired range of motion, decreased strength, lymphedema, and altered postures and kinematics. Therefore, the aim of this study was to investigate the effect of myofascial therapy in addition to a standard physical therapy program for treatment of upper limb dysfunctions in breast cancer survivors. METHODS: Fifty women treated for a unilateral breast cancer with pain and myofascial dysfunctions at the upper limb region...
February 14, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28157790/physical-design-factors-contributing-to-patient-falls
#20
Debajyoti Pati, Shabboo Valipoor, Aimee Cloutier, James Yang, Patricia Freier, Thomas E Harvey, Jaehoon Lee
OBJECTIVES: The aim of this study was to identify physical design elements that contribute to potential falls in patient rooms. METHODS: An exploratory, physical simulation-based approach was adopted for the study. Twenty-seven subjects, older than 70 years (11 male and 16 female subjects), conducted scripted tasks in a mockup of a patient bathroom and clinician zone. Activities were captured using motion-capture technology and video recording. After biomechanical data processing, video clips associated with potential fall moments were extracted and then examined and coded by a group of registered nurses and health care designers...
February 3, 2017: Journal of Patient Safety
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