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https://www.readbyqxmd.com/read/28343304/geometry-calibration-between-x-ray-source-and-detector-for-tomosynthesis-with-a-portable-x-ray-system
#1
Kohei Sato, Takashi Ohnishi, Masashi Sekine, Hideaki Haneishi
PURPOSE: Tomosynthesis is attracting attention as a low-dose tomography technology compared with X-ray CT. However, conventional tomosynthesis imaging devices are large and stationary. Furthermore, there is a limitation in the working range of the X-ray source during image acquisition. We have previously proposed the use of a portable X-ray device for tomosynthesis that can be used for ward rounds and emergency medicine. The weight of this device can be reduced by using a flat panel detector (FPD), and flexibility is realized by the free placement of the X-ray source and FPD...
March 25, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28338618/real-time-gait-event-detection-based-on-kinematic-data-coupled-to-a-biomechanical-model-%C3%A2
#2
Stefan Lambrecht, Anna Harutyunyan, Kevin Tanghe, Maarten Afschrift, Joris De Schutter, Ilse Jonkers
Real-time detection of multiple stance events, more specifically initial contact (IC), foot flat (FF), heel off (HO), and toe off (TO), could greatly benefit neurorobotic (NR) and neuroprosthetic (NP) control. Three real-time threshold-based algorithms have been developed, detecting the aforementioned events based on kinematic data in combination with a biomechanical model. Data from seven subjects walking at three speeds on an instrumented treadmill were used to validate the presented algorithms, accumulating to a total of 558 steps...
March 24, 2017: Sensors
https://www.readbyqxmd.com/read/28271087/comparison-of-pediatric-and-general-orthopedic-surgeons-approaches-in-management-of-developmental-dysplasia-of-the-hip-and-flexible-flatfoot-the-road-to-clinical-consensus
#3
Ramin Haj Zargarbashi, Hirbod Nasiri Bonaki, Shayan Abdollah Zadegan, Taghi Baghdadi, Mohammad Hossein Nabian, Mehdi Ramezan Shirazi
Developmental dysplasia of the hip (DDH) and flatfoot are common pediatric orthopedic disorders, being referred to and managed by both general and pediatric orthopedic surgeons, through various modalities. Our study aimed to evaluate their consensus and perspective disagreements in terms of diagnostic and therapeutic approaches of the mentioned deformities. Forty participants in two groups of general orthopedic surgeons (GOS) (n=20) and pediatric orthopedic surgeons (POS) (n=20), were asked to answer an 8-item questionnaire on DDH and flexible flatfoot...
January 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/28269407/real-time-gait-event-detection-for-lower-limb-amputees-using-a-single-wearable-sensor
#4
H F Maqbool, M A B Husman, M I Awad, A Abouhossein, P Mehryar, N Iqbal, A A Dehghani-Sanij
This paper presents a rule-based real-time gait event/phase detection system (R-GEDS) using a shank mounted inertial measurement unit (IMU) for lower limb amputees during the level ground walking. Development of the algorithm is based on the shank angular velocity in the sagittal plane and linear acceleration signal in the shank longitudinal direction. System performance was evaluated with four control subjects (CS) and one transfemoral amputee (TFA) and the results were validated with four FlexiForce footswitches (FSW)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28257946/the-kinetic-and-kinematic-stability-measures-in-healthy-adult-subjects-with-and-without-flat-foot
#5
Paul S Sung, J Timothy Zipple, John M Andraka, Pamela Danial
BACKGROUND: Flat foot problems are associated with impaired mobility and postural stability. The purpose of this study was to compare the kinematic and kinetic indices during one leg standing between subjects with and without flat foot. METHODS: Forty-four participants enrolled in the study, including 22 subjects with flat foot and 22 control subjects. The measurements included kinematic stability on the trunk as well as kinetic stability from a force plate. All participants were asked to maintain one leg standing with the contralateral hip and knee flexed to approximately 90° for 25seconds...
January 27, 2017: Foot
https://www.readbyqxmd.com/read/28227650/real-time-gait-event-detection-for-lower-limb-amputees-using-a-single-wearable-sensor
#6
H F Maqbool, M A B Husman, M I Awad, A Abouhossein, P Mehryar, N Iqbal, A A Dehghani-Sanij, H F Maqbool, M A B Husman, M I Awad, A Abouhossein, P Mehryar, N Iqbal, A A Dehghani-Sanij, M A B Husman, M I Awad, N Iqbal, P Mehryar, H F Maqbool, A Abouhossein, A A Dehghani-Sanij
This paper presents a rule-based real-time gait event/phase detection system (R-GEDS) using a shank mounted inertial measurement unit (IMU) for lower limb amputees during the level ground walking. Development of the algorithm is based on the shank angular velocity in the sagittal plane and linear acceleration signal in the shank longitudinal direction. System performance was evaluated with four control subjects (CS) and one transfemoral amputee (TFA) and the results were validated with four FlexiForce footswitches (FSW)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28186914/design-and-validation-of-a-biofeedback-device-to-improve-heel-to-toe-gait-in-seniors
#7
Abhishek Vadnerkar, Sabrina Figueiredo, Nancy Mayo, Robert Kearney
A feature of healthy human walking gait is a clearly defined heel-strike at initial contact, known as heel-to-toe gait. However, a common consequence of ageing is the deterioration of this heel first gait towards a flat foot, or 'shuffling' gait. This leads to a shortened stride length, slowed gait speed, and an increased fall risk. Shuffling gait is normally treated by physiotherapy, however, therapist time is limited and training is restricted to a clinical environment. Gait rehabilitation could be expedited with the use of a device that distinguishes between heel-to-toe and shuffling gait and gives feedback to the user...
February 7, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28182859/radiographic-study-of-pes-planovarus
#8
Janic Aebi, Monika Horisberger, Arno Frigg
BACKGROUND: Depending on the direction of the subtalar joint, a foot deformity generally tends towards pronation (pes planovalgus) or supination (pes cavovarus). However, the combination of hindfoot varus and flat midfoot/forefoot (pes planovarus) is an exception to this rule. Pes planovarus has so far only been referred to in connection with Müller-Weiss disease and congenital disease. We diagnosed pes planovarus in otherwise healthy patients without these diseases. METHODS: Forty patients with 54 symptomatic feet who were treated between August 2012 and July 2016 were included (mean age, 44...
February 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28144406/fatigue-effect-on-linear-center-of-pressure-measures-during-gait-in-people-with-flat-feet
#9
Mohammad Ali Sanjari, Sahar Boozari, Ali Ashraf Jamshidi, Mohammad Reza Nikmaram
BACKGROUND: Flat foot, as one of the common foot deformities can affect gait biomechanics and risk of lower extremity injury. Fatigue, as a high load task, can also change biomechanical parameters of locomotion. Studying normal and flat footed individuals under high load tasks such as fatigue can elucidate their differences more easily. OBJECTIVES: In this study, center of pressure (CoP) changes were studied between individuals with flat and normal feet after fatigue...
December 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/28046009/stiffness-effects-in-rocker-soled-shoes-biomechanical-implications
#10
Shih-Yun Lin, Pei-Fang Su, Chia-Hua Chung, Chi-Chun Hsia, Chih-Han Chang
Rocker-soled shoes provide a way to reduce the possible concentration of stress, as well as change movement patterns, during gait. This study attempts to examine how plantar force and spatio-temporal variables are affected by two rocker designs, one with softer and one with denser sole materials, by comparing them with the barefoot condition and with flat-soled shoes. Eleven subjects' gait parameters during walking and jogging were recorded. Our results showed that compared with barefoot walking, plantar forces were higher for flat shoes while lower for both types of rocker shoes, the softer-material rocker being the lowest...
2017: PloS One
https://www.readbyqxmd.com/read/28033053/the-effect-of-walking-speed-on-foot-kinematics-is-modified-when-increased-pronation-is-induced
#11
Joana F Hornestam, Thales R Souza, Paula Arantes, Juliana Ocarino, Paula L Silva
BACKGROUND: The relation between walking speed and foot kinematics during gait is not well established, and neither is it clear whether this relation is modified in the presence of factors expected to increase pronation (eg, abnormal foot alignment). Understanding how foot kinematics is affected by walking speed under varying conditions could contribute to our understanding of stresses to the musculoskeletal system during walking. We evaluated the effect of walking speed on foot kinematics in the frontal plane during gait and determined whether this effect is modified by using medially inclined insoles that force the foot into increased pronation...
November 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28008365/development-of-a-prototype-of-portable-fes-rehabilitation-system-for-relearning-of-gait-for-hemiplegic-subjects
#12
Takashi Watanabe, Shun Endo, Ryusei Morita
This study aimed at developing a prototype of portable FES rehabilitation system for relearning gait pattern of healthy subjects, which can measure gait information during walking applying electrical stimulation for foot drop correction or providing timing information. A gait event detection method using an inertial sensor attached on the foot was determined based on gait of healthy subjects from simultaneous measurements with pressure sensors. From the result of comparing the detected gait event timings with EMG signal of the tibialis anterior muscle during walking of healthy subjects, the toe off and the foot flat timings detected by the inertial sensor were suggested to be useful to determine the stimulation timing for the foot drop correction...
December 2016: Healthcare Technology Letters
https://www.readbyqxmd.com/read/27960398/highly-anisotropic-adhesive-film-made-from-upside-down-flat-and-uniform-vertically-aligned-cnts
#13
Sanghyun Hong, Troy Lundstrom, Ranajay Ghosh, Hamed Abdi, Ji Hao, Sun Kyoung Jeoung, Paul Su, Jonghwan Suhr, Ashkan Vaziri, Nader Jalili, Yung Joon Jung
We have created a multifunctional dry adhesive film with transferred vertically aligned carbon nanotubes (VA-CNTs). This unique VA-CNT film was fabricated by a multistep transfer process, converting the flat and uniform bottom of VA-CNTs grown on atomically flat silicon wafer substrates into the top surface of an adhesive layer. Unlike as-grown VA-CNTs, which have a nonuniform surface, randomly entangled CNT arrays, and a weak interface between the CNTs and substrates, this transferred VA-CNT film shows an extremely high coefficient of static friction (COF) of up to 60 and a shear adhesion force 30 times higher (12 N/cm(2)) than that of the as-grown VA-CNTs under a very small preloading of 0...
December 14, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27922985/video-analysis-of-anterior-cruciate-ligament-acl-injuries-a-systematic-review
#14
Victor R Carlson, Frances T Sheehan, Barry P Boden
BACKGROUND: As the most viable method for investigating in vivo anterior cruciate ligament (ACL) rupture, video analysis is critical for understanding ACL injury mechanisms and advancing preventative training programs. Despite the limited number of published studies involving video analysis, much has been gained through evaluating actual injury scenarios. METHODS: Studies meeting criteria for this systematic review were collected by performing a broad search of the ACL literature with use of variations and combinations of video recordings and ACL injuries...
November 29, 2016: JBJS Reviews
https://www.readbyqxmd.com/read/27886420/posterior-tibial-tendinopathy-associated-with-matrix-metalloproteinase-13-promoter-genotype-and-haplotype
#15
REVIEW
Francielle Boçon de Araujo Munhoz, José Eduardo Baroneza, Alexandre Godoy-Santos, Túlio Diniz Fernandes, Filipe Polese Branco, Lupe Furtado Alle, Ricardo Lehtonen de Souza, Maria Cristina Leme Godoy Dos Santos
BACKGROUND: Posterior tibial tendon (PTT) is particularly vulnerable and its insufficiency is recognized as the main cause of adult acquired flat foot. Some patients have a predisposition without a clinically recognized cause, suggesting that individual characteristics play an important role in tendinopathy. The present study investigated whether genetic variants in matrix metalloproteinases (MMPs) are associated with PTT dysfunction. METHODS: One hundred women who presented PTT dysfunction, with histopathological examination of the tendon and magnetic resonance imaging (MRI) confirming tendinopathy, as well as 100 asymptomatic women who presented intact PPT as assessed by MRI and constituting the control group, were evaluated for MMP-13 g...
November 2016: Journal of Gene Medicine
https://www.readbyqxmd.com/read/27876118/flat-shoes-increase-neurogenesis
#16
J Flensmark
The impairment of the horizontal is caused by elevation of the heel of the foot from the ground. Receptors in the soles of the feet provide a mapping of body orientation to the upright, and is identical to Mittelstaedt's idiotropic tendency. Initiation of gait wearing flat shoes without elevation of the heel is sufficient to change to a truthful horizontal. Using flat shoes increases neurogenesis and leads to a decreased frequency of diseases of the nervous system.
December 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27847725/rehabilitation-treatment-of-a-child-diagnosed-with-duplication-of-1q42-q44-a-case-report
#17
Seong Woo Kim, Jiyong Kim, Ha Ra Jeon, Min Jung Park, Yoon Kim
Trisomy 1 is a rare chromosomal anomaly and has never been reported in Korea. Clinical features of trisomy 1 include macrocephaly, prominent forehead, flat nasal bridge, low set ears, and micrognathia, all of which result in a very distinguishable facial structure. A child with trisomy 1 also suffers from mental retardation and/or developmental delays. In this case report, the child was diagnosed with de novo trisomy 1 without receiving any treatment until visiting our hospital. The child suffered from foot and ankle deformities, leading her unable to stand independently...
October 2016: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27843284/studying-maximum-plantar-stress-per-insole-design-using-foot-ct-scan-images-of-hyperelastic-soft-tissues
#18
Ali Sarikhani, Abbas Motalebizadeh, Sasan Asiaei, Babak Kamali Doost Azad
The insole shape and the resulting plantar stress distribution have a pivotal impact on overall health. In this paper, by Finite Element Method, maximum stress value and stress distribution of plantar were studied for different insoles designs, which are the flat surface and the custom-molded (conformal) surface. Moreover, insole thickness, heel's height, and different materials were used to minimize the maximum stress and achieve the most uniform stress distribution. The foot shape and its details used in this paper were imported from online CT-Scan images...
2016: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/27825592/immediate-effects-of-foot-orthoses-on-pain-during-functional-tasks-in-people-with-patellofemoral-osteoarthritis-a-cross-over-proof-of-concept-study
#19
Natalie J Collins, Rana S Hinman, Hylton B Menz, Kay M Crossley
BACKGROUND: The purpose of the study was to determine whether prefabricated foot orthoses immediately reduce pain during functional tasks in people with patellofemoral osteoarthritis, compared to flat insoles and shoes alone. METHODS: Eighteen people with predominant lateral patellofemoral osteoarthritis (nine women; mean [SD] age 59 [10]years; body mass index 27.9 [3.2]kg/m(2)) performed functional tasks wearing running sandals, and then wearing foot orthoses and flat insoles (random order)...
November 4, 2016: Knee
https://www.readbyqxmd.com/read/27824657/effect-of-footwear-on-joint-pain-and-function-in-older-adults-with-lower-extremity-osteoarthritis
#20
Amy Wagner, Sarah Luna
BACKGROUND AND PURPOSE: Lower extremity osteoarthritis (OA) is a common condition among older adults; given the risks of surgical and pharmaceutical interventions, conservative, lower-cost management options such as footwear warrant further investigation. This systematic review investigated the effects of footwear, including shoe inserts, in reducing lower extremity joint pain and improving gait, mobility, and quality of life in older adults with OA. METHODS: The CINAHL, SPORTDiscus, PubMed, RECAL, and Web of Knowledge databases were searched for publications from January 1990 to September 2014, using the terms "footwear," "shoes," "gait," "pain," and "older adult...
November 7, 2016: Journal of Geriatric Physical Therapy
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