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https://www.readbyqxmd.com/read/28047829/th-ab-201-07-filmless-treatment-localization-qa-for-the-cyberknife-system
#1
J Gersh, M Noll
PURPOSE: Accuray recommends daily evaluation of the treatment localization and delivery systems (TLS/TDS) of the CyberKnife. The vendor-provided solution is a Winston-Lutz-type test that evaluates film shadows from an orthogonal beam pair (known as AQA). Since film-based techniques are inherently inefficient and potentially inconsistent and uncertain, this study explores a method which provides a comparable test with greater efficiency, consistency, and certainty. This test uses the QAStereoChecker (QASC, Standard Imaging, Inc...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047456/mo-de-207a-06-ecg-gated-ct-reconstruction-for-a-c-arm-inverse-geometry-x-ray-system
#2
J M Slagowski, Dap Dunkerley
PURPOSE: To obtain ECG-gated CT images from truncated projection data acquired with a C-arm based inverse geometry fluoroscopy system, for the purpose of cardiac chamber mapping in interventional procedures. METHODS: Scanning-beam digital x-ray (SBDX) is an inverse geometry fluoroscopy system with a scanned multisource x-ray tube and a photon-counting detector mounted to a C-arm. In the proposed method, SBDX short-scan rotational acquisition is performed followed by inverse geometry CT (IGCT) reconstruction and segmentation of contrast-enhanced objects...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27967273/eccentric-overload-training-in-team-sports-functional-performance-constant-bilateral-vertical-vs-variable-unilateral-multidirectional-movements
#3
Oliver Gonzalo-Skok, Julio Tous-Fajardo, Carlos Valero-Campo, César Berzosa, Ana Vanessa Bataller, José Luis Arjol-Serrano, Gerard Moras, Alberto Mendez-Villanueva
PURPOSE: This study analyzed the effects of two different eccentric overload training (EOT) programs, using a rotational conical-pulley, on functional performance in team-sports players. A traditional movement paradigm (i.e., squat) including several sets of one bilateral and vertical movement was compared to a novel paradigm including a different exercise in each set of unilateral and multidirectional movements. METHODS: Forty-eight amateur/semiprofessional team-sport players were randomly assigned to an EOT program including either the same bilateral-vertical (CBV, n=24) movement (squat) or different unilateral-multidirectional (VUMD, n=24) movements...
December 14, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27942898/assessment-of-endolymphatic-hydrops-and-otolith-function-in-patients-with-m%C3%A3-ni%C3%A3-re-s-disease
#4
Tomoko Okumura, Takao Imai, Yasumitsu Takimoto, Noriaki Takeda, Tadashi Kitahara, Atsuhiko Uno, Takefumi Kamakura, Yasuhiro Osaki, Yoshiyuki Watanabe, Hidenori Inohara
Ménière's disease is associated with hydrops of the inner ear endolymphatic space, and histopathologically, the cochlea and vestibule are usually involved. We used gadolinium-enhanced magnetic resonance imaging and measured cervical and ocular vestibular evoked myogenic potentials and the gain in the utricular induced linear vestibulo-ocular reflex to test the hypothesis that vestibular hydrops in Ménière's disease patients is associated with otolith organ dysfunction. We evaluated 21 patients diagnosed with unilateral definitive Ménière's disease using gadolinium magnetic resonance imaging to detect endolymphatic hydrops in the cochlea and vestibule...
December 10, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27921118/can-different-occlusal-positions-instantaneously-impact-spine-and-body-posture-a-pilot-study-using-rasterstereography-for-a-three-dimensional-evaluation
#5
Karoline März, Werner Adler, Ragai-Edward Matta, Linda Wolf, Manfred Wichmann, Bastian Bergauer
PURPOSE: Orthodontists influence dental occlusion directly. To suggest any link between dental occlusion and body posture is highly contentious, as evidenced by the literature. Rasterstereography, an optical technique that enables three-dimensional (3D) body measurements to be collected, has not yet been used to impartially examine whether different occlusal positions could instantaneously alter spine and body posture. We therefore set out to use this technique to nonsubjectively evaluate this question under static conditions...
December 5, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27824237/focused-extracorporeal-shock-wave-therapy-combined-with-supervised-eccentric-training-for-supraspinatus-calcific-tendinopathy
#6
Ettore Carlisi, Claudio Lisi, Anna Dall'angelo, Serena Monteleone, Vincenza Nola, Carmine Tinelli, Elena Dalla Toffola
BACKGROUND: Extracorporeal shock wave therapy is effective in reducing shoulder pain and improving function in calcific supraspinatus tendinopathy. Eccentric exercise has been introduced as an effective treatment choice for Achilles tendinopathy, but poor evidence exists about its role in the treatment of rotator cuff tendinopathy. AIM: To investigate if adding a supervised eccentric training of the shoulder abductor muscles could improve the outcome of extracorporeal shock wave therapy...
November 8, 2016: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27813683/shoulder-rotator-strength-range-of-motion-and-acromiohumeral-distance-in-asymptomatic-adolescent-volleyball-attackers
#7
Gulcan Harput, Hande Guney, Ugur Toprak, Tunca Kaya, Fatma Filiz Colakoglu, Gul Baltaci
CONTEXT: Sport-specific adaptations at the glenohumeral joint could occur in adolescent athletes because they start participating in high-performance sports in early childhood. OBJECTIVE: To investigate shoulder-rotator strength, internal-rotation (IR) and external-rotation (ER) range of motion (ROM), and acromiohumeral distance (AHD) in asymptomatic adolescent volleyball attackers to determine if they have risk factors for injury. DESIGN: Cross-sectional study...
September 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27791241/comparison-of-femoral-head-translation-following-eccentric-rotational-acetabular-osteotomy-and-rotational-acetabular-osteotomy
#8
Tohru Irie, Daisuke Takahashi, Tsuyoshi Asano, Ryuta Arai, Takuya Konno, Tomohiro Onodera, Eiji Kondo, Norimasa Iwasaki
PURPOSE: Eccentric rotational acetabular osteotomy (ERAO) is a modification of rotational acetabular osteotomy (RAO); it has been reported that ERAO allows the femoral head to translate medially and distally. However, no study has compared femoral head translation following RAO or ERAO. The purpose of this study was to compare immediate postoperative translation of the femoral head after RAO and ERAO in comparison with the preoperative position by radiological methods. METHODS: Patients treated by RAO or ERAO between 2006 and 2014 were retrospectively evaluated...
October 26, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27762669/the-validation-and-application-of-inertial-measurement-units-to-springboard-diving
#9
Cherie Walker, Peter Sinclair, Kenneth Graham, Stephen Cobley
Inertial Measurement Units (IMUs) may offer an ecologically valid, reliable, and practical method for biomechanical performance analysis. With such potential in mind, Part 1 of this study examined the accuracy of IMUs gyroscopes with an optical system (Cortex 3.3). A calibration formula standardised the IMUs angular velocity output with the optical system. The percentage differences between the two measures = 0.5% (p < 0.05), suggest IMU's efficacy for application. In Part 2, the aim was to examine and understand how dive flight angular velocity time series plots change and increase according to dive degree of difficulty...
October 20, 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27734436/pectoralis-major-injury-during-basic-airborne-training
#10
Sean McIntire, Lee Boujie, John Leasiolagi
Injuries involving rupture of the pectoralis major are relatively rare. When they do occur, it is mostly frequently in a young, athletic man. The most common cause is weight lifting that results in eccentric muscle contraction (muscle contraction against an overbearing force, leading to muscle lengthening)-specifically, the bench press. Other mechanisms for this injury include forceful abduction and external rotation of the arm. Injury can occur anywhere along the pectoralis major from its medial origin on the sternum and clavicle to its lateral tendinous insertion on the humerus...
December 0: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/27725367/influence-of-eccentric-cyclic-loading-on-implant-components-comparison-between-external-joint-system-and-internal-joint-system
#11
Kei Sakamoto, Shinya Homma, Takuya Takanashi, Shinji Takemoto, Yoshitaka Furuya, Masao Yoshinari, Yasutomo Yajima
The purpose of this in vitro study was to investigate the influence of eccentric loading on implant components by measuring screw loosening and observing these components under several load positions and magnitudes. The external and internal joint system implants with butt joint connection were subjected to cyclic loading tests according to the specifications of ISO 14801. Load position was set at 0, 4, or 8 mm, and load was set at 100 or 300 N. On the external joint system, the reverse torque values decreased with distal shift in the loading position and an increase in magnitude of load, and abrasion and deformation on the anti-rotation device were observed...
December 1, 2016: Dental Materials Journal
https://www.readbyqxmd.com/read/27694585/a-pre-operative-predictive-score-for-the-outcome-of-eccentric-rotational-acetabular-osteotomy-in-the-treatment-of-acetabular-dysplasia-and-early-osteoarthritis-of-the-hip-in-adults
#12
T Amano, Y Hasegawa, T Seki, Y Takegami, K Murotani, N Ishiguro
AIMS: The influence of identifiable pre-operative factors on the outcome of eccentric rotational acetabular osteotomy (ERAO) is unknown. We aimed to determine the factors that might influence the outcome, in order to develop a scoring system for predicting the prognosis for patients undergoing this procedure. PATIENTS AND METHODS: We reviewed 700 consecutive ERAOs in 54 men and 646 women with symptomatic acetabular dysplasia or early onset osteoarthritis (OA) of the hip, which were undertaken between September 1989 and March 2013...
October 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27683004/the-oculomotor-salience-of-flicker-apparent-motion-and-continuous-motion-in-saccade-trajectories
#13
Wieske van Zoest, Benedetta Heimler, Francesco Pavani
The aim of the present study was to investigate the impact of dynamic distractors on the time-course of oculomotor selection using saccade trajectory deviations. Participants were instructed to make a speeded eye movement (pro-saccade) to a target presented above or below the fixation point while an irrelevant distractor was presented. Four types of distractors were varied within participants: (1) static, (2) flicker, (3) rotating apparent motion and (4) continuous motion. The eccentricity of the distractor was varied between participants...
September 28, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27676829/isokinetic-rehabilitation-in-the-chronic-former-instability-of-the-shoulder-for-individualized-rehabilitative-care
#14
Ludovic Humetz
OBJECTIVE: The isokinetic exploration of the shoulder seems little standardized, particularly at the time of the choice of the studied muscular groups, of the installation of the subject as well as positioning of the articulation itself. OBSERVATIONS: Rehabilitation treatment of a 17 year old patient, hyperlaxe, swimmer, in the context of a painful chronic former instability of the shoulder without osseous, muscular lesion or labrale. An isokinetic work of reinforcement of the internal rotators is carried out, into concentric of 60°/s to 240°/s, position known as of Davies modified then in decubitus dorsal of 45° to 90° of abduction...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27670356/humeral-elevation-reduces-the-dynamic-control-ratio-of-the-shoulder-muscles-during-internal-rotation
#15
William Howard, Jonathan Burgess, Borut Vrhovnik, Christian Stringer, Sherrie T Choy, Jonathan F Marsden, Ingrid A Gedikoglou, Gary L Shum
OBJECTIVES: To determine the differences in the dynamic control ratio of the glenohumeral joint rotators, during internal rotation at 20° and 60° of humeral elevation in the scapular plan. Dynamic control ratio (DCR) is defined as the ratio between eccentric action of the lateral rotators and the concentric action of the medial rotators. DESIGN: A cross-sectional laboratory study. METHODS: Thirty asymptomatic participants (men n=14, women n=16, mean age=29...
September 16, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27633214/vibrotactile-perception-assessment-for-a-haptic-interface-on-an-antigravity-suit
#16
Sang Min Ko, Kwangil Lee, Daeho Kim, Yong Gu Ji
Haptic technology is used in various fields to transmit information to the user with or without visual and auditory cues. This study aimed to provide preliminary data for use in developing a haptic interface for an antigravity (anti-G) suit. With the structural characteristics of the anti-G suit in mind, we determined five areas on the body (lower back, outer thighs, inner thighs, outer calves, and inner calves) on which to install ten bar-type eccentric rotating mass (ERM) motors as vibration actuators. To determine the design factors of the haptic anti-G suit, we conducted three experiments to find the absolute threshold, moderate intensity, and subjective assessments of vibrotactile stimuli...
January 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/27632848/the-effect-of-shoulder-plyometric-training-on-amortization-time-and-upper-extremity-kinematics
#17
Kathleen A Swanik, Stephen J Thomas, Aaron H Struminger, Kellie C Huxel Bliven, John D Kelly, Charles B Swanik
CONTEXT: Plyometric training is credited with providing benefits in performance and dynamic restraint. However, limited prospective data exist quantifying kinematic adaptations such as amortization time, glenohumeral rotation, and scapulothoracic position, which may underlie the efficacy of plyometric training for upper-extremity rehabilitation or performance enhancement. OBJECTIVE: To measure upper-extremity kinematics and plyometric phase times before and after an 8-wk upper-extremity strength- and plyometric-training program...
December 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27551938/absence-of-bilateral-differences-in-child-baseball-players-with-throwing-related-pain
#18
M Mickevičius, S Rutkauskas, S Sipavičienė, A Skurvydas, J Jürimäe, H Degens, S Kamandulis
The aim of this study was to assess whether side-to-side differences in morphology and function of the upper limbs in 11-12 year-old male baseball players with throwing-related pain (n=14) were more pronounced than that of age-matched healthy untrained subjects (n=16). Baseball players 1) had played baseball≥4.5 h·wk(-1) for ≥ 4 years and (2) suffered from moderate-intensity (3-6 points on 10-point questionnaire scale) throwing-related pain in the shoulder or elbow in at least 2 training sessions within the past month...
November 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27500450/hand-held-dynamometry-strength-measures-for-internal-and-external-rotation-demonstrate-superior-reliability-lower-minimal-detectable-change-and-higher-correlation-to-isokinetic-dynamometry-than-externally-fixed-dynamometry-of-the-shoulder
#19
K L Holt, D P Raper, C E Boettcher, G S Waddington, M K Drew
OBJECTIVES: To investigate inter and intra-rater reliability of hand held (HHD) and externally fixed (EFD) dynamometry for shoulder internal (IR) and external rotation (ER) strength and their correlation to isokinetic testing. DESIGN: Within participant, inter and intra-rater reliability study. PARTICIPANTS: Twenty active, healthy male and female participants underwent testing by two examiners. OUTCOME MEASURES: Intra-class coefficients (ICC), percentage standard error of measurement (%SEM), and percentage minimal detectable change (%MDC) were calculated for inter-rater, intra-day and intra-rater, inter-week reliability...
September 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/27468482/-clinical-significance-of-hip-rotation-center-location-after-reconstruction-with-modular-hemipelvic-prostheses-for-pelvic-tumor
#20
Yi Luo, Hong Duan, Jiao-ming Luo, Yong Zhou, Li Min, Wen-li Zhang, Rui Shi, Chang Zou, Chong-qi Tu
OBJECTIVE: To investigatethe clinical significance of hip rotation center location after reconstruction with modular hemipelvic prostheses for periacetabula tumors. METHODS: Forty-two patients who received periacetabular tumor resection and reconstruction with modular hemipelvic prosthesis between January 2004 and January 2014 in our institute were included. Postoperative complications, function (measured by MSTS score), survival rate and recurrence rate were analyzed...
May 2016: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
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