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https://www.readbyqxmd.com/read/28813902/hybrid-position-and-orientation-tracking-for-a-passive-rehabilitation-table-top-robot
#1
K K Wojewoda, P R Culmer, J F Gallagher, A E Jackson, M C Levesley
This paper presents a real time hybrid 2D position and orientation tracking system developed for an upper limb rehabilitation robot. Designed to work on a table-top, the robot is to enable home-based upper-limb rehabilitative exercise for stroke patients. Estimates of the robot's position are computed by fusing data from two tracking systems, each utilizing a different sensor type: laser optical sensors and a webcam. Two laser optical sensors are mounted on the underside of the robot and track the relative motion of the robot with respect to the surface on which it is placed...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28790467/current-concepts-in-acetabular-positioning-in-total-hip-arthroplasty
#2
Deepu Bhaskar, Asim Rajpura, Tim Board
Being one of the most successful surgeries in the history of medicine, the indications for total hip arthroplasty have widened and are increasingly being offered to younger and fitter patients. This has also led to high expectations for longevity and outcomes. Acetabular cup position has a significant impact on the results of hip arthroplasty as it affects dislocation, abductor muscle strength, gait, limb lengths, impingement, noise generation, range of motion (ROM), wear, loosening, and cup failure. The variables in cup position are depth, height, and angular position (anteversion and inclination)...
July 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28742758/the-effect-of-an-adjustable-hinged-operating-table-on-lumbar-lordosis-during-lumbar-surgery
#3
Arjun Sebastian, Amin Ahmed, Brian Vernon, Emily C Nguyen, Ilyas Aleem, Michelle J Clarke, Bradford L Currier, Paul Anderson, Mohamad Bydon, Ahmad Nassr
STUDY DESIGN: Prospective observational study OBJECTIVES.: Quantify the amount of lumbar lordosis achieved on a hinged operative table in neutral, flexion, and extension. SUMMARY OF BACKGROUND DATA: Hinged operative tables may allow surgeons to adjust lumbar spine positioning intraoperatively. The amount of lumbar lordosis in neutral, flexion, and extension positions has not been quantified prospectively using a hinged table. METHODS: Thirty patients undergoing elective lumbar surgery were enrolled...
July 24, 2017: Spine
https://www.readbyqxmd.com/read/28727549/learning-and-inferring-dark-matter-and-predicting-human-intents-and-trajectories-in-videos
#4
Dan Xie, Tianmin Shu, Sinisa Todorovic, Song-Chun Zhu
This paper presents a method for localizing functional objects and predicting human intents and trajectories in surveillance videos of public spaces, under no supervision in training. People in public spaces are expected to intentionally take shortest paths (subject to obstacles) toward certain objects (e.g. vending machine, picnic table, dumpster etc.) where they can satisfy certain needs (e.g., quench thirst). Since these objects are typically very small or heavily occluded, they cannot be inferred by their visual appearance but indirectly by their influence on people's trajectories...
July 19, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28722314/prospective-motion-correction-using-coil-mounted-cameras-cross-calibration-considerations
#5
Julian Maclaren, Murat Aksoy, Melvyn B Ooi, Benjamin Zahneisen, Roland Bammer
PURPOSE: Optical prospective motion correction substantially reduces sensitivity to motion in neuroimaging of human subjects. However, a major barrier to clinical deployment has been the time-consuming cross-calibration between the camera and MRI scanner reference frames. This work addresses this challenge. METHODS: A single camera was mounted onto the head coil for tracking head motion. Two new methods were developed: (1) a rapid calibration method for camera-to-scanner cross-calibration using a custom-made tool incorporating wireless active markers, and (2) a calibration adjustment method to compensate for table motion between scans...
July 19, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28675598/mr-based-truncation-and-attenuation-correction-in-integrated-pet-mr-hybrid-imaging-using-huge-with-continuous-table-motion
#6
Maike E Lindemann, Mark Oehmigen, Jan O Blumhagen, Marcel Gratz, Harald H Quick
PURPOSE: The objective of this study was to introduce and evaluate a method for MR-based attenuation and truncation correction in phantom and patient measurements to improve PET quantification in PET/MR hybrid imaging. METHODS: The fully MR-based method HUGE (B0 Homogenization using gradient enhancement) provides field-of-view extension in MR imaging, which can be used for truncation correction and improved PET quantification in PET/MR hybrid imaging. The HUGE method in this recent implementation is combined with continuously moving table data acquisition to provide a seamless non-truncated whole-body data set of the outer patient contours to complete the established standard MR-based Dixon-VIBE data for attenuation correction...
July 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/28651417/-influences-of-different-rehabilitative-methods-on-function-of-hands-and-psychological-anxiety-of-patients-with-deeply-burned-hands-retaining-denatured-dermis-and-grafting-large-autologous-skin
#7
RANDOMIZED CONTROLLED TRIAL
H Peng, P F Liang, A Wang, L Q Yue
Objective: To investigate influences of different rehabilitative methods on function of hands and psychological anxiety of patients with deeply burned hands retaining denatured dermis and grafting large autologous skin. Methods: Forty-four patients with deeply burned hands, conforming to the study criteria were admitted to Department of Burns and Reconstructive Surgery of Xiangya Hospital of Central South University from January 2014 to June 2015. Patients were divided into propaganda education rehabilitation group (PER, n=23) and specially-assigned person rehabilitation group (SAPR, n=21) according to the random number table and patients' willingness...
May 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28637143/validity-and-reliability-of-an-activity-monitor-to-quantify-arm-movements-and-activity-in-adults-following-distal-radius-fracture
#8
Andrea M Bruder, Jodie A McClelland, Nora Shields, Karen J Dodd, Raphael Hau, Alexander T M van de Water, Nicholas F Taylor
PURPOSE: To examine the validity and reliability of an activity monitor to estimate upper limb activity. METHODS: Thirty-two adults after distal radial fracture were recruited. 15 adults performed five upper limb activities during two testing sessions, one week apart to investigate criterion validity against the criterion reference of three-dimensional motion analysis, convergent validity, and test-retest reliability. 17 adults in two therapy groups wore monitors for three consecutive days at baseline and six weeks post-intervention...
February 23, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28609198/interzonal-airflow-rates-for-use-in-near-field-far-field-workplace-concentration-modeling
#9
Chris Keil, Yuxi Zhao
Interzonal air flow rates (β) for a workspace above a table were measured in 12 indoor air spaces using an experimental apparatus simulating a vapor release into an occupied near zone. The near field was modeled as a 0.32 m(3) rectangular cube volume 0.60 m high above the 0.60 m × 0.90 m table. A total of 74 experimental measurements of β were made. The apparatus consisted of photoionization detectors measuring concentrations of acetone around an evaporating liquid surface with a robot arm simulating worker motion in the near field...
June 13, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28604690/all-optical-observation-and-reconstruction-of-spin-wave-dispersion
#10
Yusuke Hashimoto, Shunsuke Daimon, Ryo Iguchi, Yasuyuki Oikawa, Ka Shen, Koji Sato, Davide Bossini, Yutaka Tabuchi, Takuya Satoh, Burkard Hillebrands, Gerrit E W Bauer, Tom H Johansen, Andrei Kirilyuk, Theo Rasing, Eiji Saitoh
To know the properties of a particle or a wave, one should measure how its energy changes with its momentum. The relation between them is called the dispersion relation, which encodes essential information of the kinetics. In a magnet, the wave motion of atomic spins serves as an elementary excitation, called a spin wave, and behaves like a fictitious particle. Although the dispersion relation of spin waves governs many of the magnetic properties, observation of their entire dispersion is one of the challenges today...
June 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28585732/cost-effective-immobilization-for-whole-brain-radiation-therapy
#11
Ashley E Rubinstein, W Scott Ingram, Brian M Anderson, Skylar S Gay, Xenia J Fave, Rachel B Ger, Rachel E McCarroll, Constance A Owens, Tucker J Netherton, Kelly D Kisling, Laurence E Court, Jinzhong Yang, Yuting Li, Joonsang Lee, Dennis S Mackin, Carlos E Cardenas
To investigate the inter- and intra-fraction motion associated with the use of a low-cost tape immobilization technique as an alternative to thermoplastic immobilization masks for whole-brain treatments. The results of this study may be of interest to clinical staff with severely limited resources (e.g., in low-income countries) and also when treating patients who cannot tolerate standard immobilization masks. Setup reproducibility of eight healthy volunteers was assessed for two different immobilization techniques...
June 6, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28573945/resuscitation-practices-of-low-and-normal-birth-weight-infants-in-nepal-an-observational-study-using-video-camera-recordings
#12
Johan Wrammert, Camilla Zetterlund, Ashish Kc, Uwe Ewald, Mats Målqvist
BACKGROUND: The global burden of stillbirth and neonatal deaths remains a challenge in low-income countries. Training in neonatal resuscitation can reduce intrapartum stillbirth and early neonatal mortality. Previous results demonstrate that infants who previously would have been registered as stillbirths are successfully resuscitated after such training, suggesting that there is a process of selection for resuscitation that needs to be explored. OBJECTIVE: To compare neonatal resuscitation of low birth weight and normal birth weight infants born at a facility in a low-income setting...
2017: Global Health Action
https://www.readbyqxmd.com/read/28567011/imaging-brain-function-with-functional-near-infrared-spectroscopy-in-unconstrained-environments
#13
Joana B Balardin, Guilherme A Zimeo Morais, Rogério A Furucho, Lucas Trambaiolli, Patricia Vanzella, Claudinei Biazoli, João R Sato
Assessing the neural correlates of motor and cognitive processes under naturalistic experimentation is challenging due to the movement constraints of traditional brain imaging technologies. The recent advent of portable technologies that are less sensitive to motion artifacts such as Functional Near Infrared Spectroscopy (fNIRS) have been made possible the study of brain function in freely-moving participants. In this paper, we describe a series of proof-of-concept experiments examining the potential of fNIRS in assessing the neural correlates of cognitive and motor processes in unconstrained environments...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28548921/repeatability-testing-of-a-new-hybrid-iii-6-year-old-atd-lower-extremity
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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...
September 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
#20
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
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