Registration free automatic identification of gold fiducial markers in MRI target delineation images for prostate radiotherapy.
CONCLUSIONS: MEGRE images was shown to be a feasible and reliable way to perform GFM identification. For clinical practice, visual inspection of the results from the automatic method is needed at the current stage. This article is protected by copyright. All rights reserved. PMID: 28803447 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 13, 2017 Category: Physics Authors: Gustafsson C, Korhonen J, Persson E, Gunnlaugsson A, Nyholm T, Olsson LE Tags: Med Phys Source Type: research

Cauda Equina Syndrome Due to Vigorous Back Massage With Spinal Manipulation in a Patient With Pre-Existing Lumbar Disc Herniation: A Case Report and Literature Review.
In conclusion, this case brings us novel knowledge that spinal massage or manipulation may worsen pre-existing disc herniation causing CES, and a timely emergency surgery is necessary and effective for treatment of CES-related symptoms. PMID: 28796647 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 7, 2017 Category: Physics Authors: Yang SD, Chen Q, Ding WY Tags: Am J Phys Med Rehabil Source Type: research

Differences in waiting list prioritization preferences of occupational therapists, elderly people and persons with disabilities: a discrete choice experiment.
Abstract OBJECTIVE: To compare the preferences of occupational therapists, elderly people and adults with disabilities regarding prioritization criteria for occupational therapy waiting lists in home care. DESIGN: Discrete choice experiment survey. Respondents completed eight choice tasks where they were asked to choose which of two referral scenarios should be prioritized for services. Scenarios varied in terms of four attributes reflecting competing issues that come into play in waiting list prioritization: the person's ability to shower, ability to enter and exit the home, history of falls and time already...
Source: Physica Medica - August 7, 2017 Category: Physics Authors: Raymond MH, Demers L, Feldman DE Tags: Arch Phys Med Rehabil Source Type: research

Risk factors for falls in community stroke survivors: A systematic review and meta-analysis.
CONCLUSIONS: This study confirms that balance and mobility problems, assisted self-care, taking sedative or psychotropic medications, cognitive impairment, depression, and history of falling are associated with falls in community stroke survivors. We recommend that any future research into falls prevention programs should consider addressing these modifiable risk factors. As the risk factors for falls in community stroke survivors are multifactorial, interventions should be multi-dimensional. PMID: 28797618 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 7, 2017 Category: Physics Authors: Xu T, Clemson L, O'Loughlin K, Lannin NA, Dean C, Koh G Tags: Arch Phys Med Rehabil Source Type: research

Relationships between respiratory parameters, exercise capacity and psychosocial factors in people with chronic obstructive pulmonary disease.
CONCLUSION: Participants with COPD demonstrated reduced respiratory parameter values and low exercise capacity but moderate PESE. We found significant correlations between exercise capacity and respiratory parameter values, but PESE was correlated with only gait speed and RPE. The study has implications for respiratory health promotion and exercise adherence. PMID: 28797622 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 7, 2017 Category: Physics Authors: Awotidebe TO, Awopeju OF, Bisiriyu LA, Ativie RN, Oke KI, Adedoyin RA, Olusola OD, Erhabor GE Tags: Ann Phys Rehabil Med Source Type: research

Experience with a process for acquiring assistive technology devices with testing in a semi-ecological situation.
PMID: 28797623 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 7, 2017 Category: Physics Authors: Compagnat M, Daviet JC, Bordes J, Munoz M, Salle JY Tags: Ann Phys Rehabil Med Source Type: research

Transcranial direct current stimulation over multiple days enhances motor performance of a grip task.
CONCLUSIONS: Anodal tDCS is effective in promoting grip motor learning in healthy individuals. Further studies are warranted to test its potential use for the rehabilitation of fine motor skills in stroke patients. PMID: 28797624 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 7, 2017 Category: Physics Authors: Fan J, Voisin J, Milot MH, Higgins J, Boudrias MH Tags: Ann Phys Rehabil Med Source Type: research

France-Quebec: Synergies in the rehabilitation sciences.
PMID: 28781206 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 3, 2017 Category: Physics Authors: Sylvie N, Patrick D, Dominic P Tags: Ann Phys Rehabil Med Source Type: research

Leveraging the Medical Context to Increase Upper Extremity Reconstruction among Patients with Tetraplegia: A Qualitative Analysis.
CONCLUSIONS: In appropriate candidates, UER produces substantial functional gains, but reconstruction remains underutilized in the tetraplegic population. By analyzing how patients achieve health and build trust in early recovery/injury, our study provides strategies to improve UER access. We propose that interventions targeting highly trusted points of care (transfer hospitals) and avoiding low-trust points (PCPs, home health) will be most effective. Urology may represent a novel entry point for UER interventions. PMID: 28782539 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 3, 2017 Category: Physics Authors: Harris CA, Muller JM, Shauver MJ, Chung KC Tags: Arch Phys Med Rehabil Source Type: research

Health Services Research in Rehabilitation and Disability - The Time is Now.
Abstract Policy drives practice, and health services research (HSR) is at the intersection of policy, practice and patient outcomes. HSR specific to rehabilitation and disability is particularly needed. As rehabilitation researchers and providers, we are uniquely positioned to provide the evidence that guides reforms targeting rehabilitative care. We have the expertise to define the value of rehabilitation in a policy-relevant context. HSR is a powerful tool for providing this evidence. We need to continue building capacity for conducting rigorous, timely rehabilitation-related HSR. Fostering stakeholder engagemen...
Source: Physica Medica - August 3, 2017 Category: Physics Authors: Graham JE, Middleton A, Bettger JP, Mallinson T, Roberts P Tags: Arch Phys Med Rehabil Source Type: research

Investigating The Efficacy of Web-based Transfer Training on Independent Wheelchair Transfers through Randomized Control Trials.
Abstract OBJECTIVES: To determine the efficacy of a web-based transfer training module at improving transfer technique across three groups: web-based training, in-person training (current standard of practice), and a waitlist control group (WLCG). Secondarily, to determine subject factors that can be used to predict improvements in transfer ability after training. DESIGN: Randomized control trials. SETTING: Summer and winter sporting events for disabled veterans. PARTICIPANTS: A convenience sample of manual and power wheelchair users who could transfer independently (n=71). INTERVENTIONS: An in...
Source: Physica Medica - August 3, 2017 Category: Physics Authors: Worobey L, Rigot S, Hogaboom N, Venus C, Boninger ML Tags: Arch Phys Med Rehabil Source Type: research

Supported Employment for Veterans with Traumatic Brain Injury: Patient Perspectives.
Abstract OBJECTIVE: To quantify the need for, and interest in, Supported Employment (SE) among recent military Veterans with traumatic brain injury (TBI), and to examine characteristics associated with Veterans' interest in SE. DESIGN: Stratified random sample of Iraq and Afghanistan War Veterans confirmed to have TBI through the Veterans Health Administration (VHA) screening and evaluation system. SETTING: Community-based via mailed survey. PARTICIPANTS: We recruited 1,800 Veterans with clinician-confirmed TBI (1,080 mild TBI; 720 moderate/severe TBI) through multiple mailings. Among 1,451 whose su...
Source: Physica Medica - August 3, 2017 Category: Physics Authors: Carlson KF, Pogoda TK, Gilbert T, Resnick SG, Twamley E, O'Neil ME, Sayer NA Tags: Arch Phys Med Rehabil Source Type: research

Image-based immersed boundary model of the aortic root.
Abstract Each year, approximately 300,000 heart valve repair or replacement procedures are performed worldwide, including approximately 70,000 aortic valve replacement surgeries in the United States alone. Computational platforms for simulating cardiovascular devices such as prosthetic heart valves promise to improve device design and assist in treatment planning, including patient-specific device selection. This paper describes progress in constructing anatomically and physiologically realistic immersed boundary (IB) models of the dynamics of the aortic root and ascending aorta. This work builds on earlier IB mod...
Source: Physica Medica - August 1, 2017 Category: Physics Authors: Hasan A, Kolahdouz EM, Enquobahrie A, Caranasos TG, Vavalle JP, Griffith BE Tags: Med Eng Phys Source Type: research

Six-minute walk performance in persons with multiple sclerosis while using passive or powered ankle-foot orthoses.
CONCLUSIONS: The current embodiment of this portable powered AFO did not improve endurance walking performance based on 6MW in a sampling of participants with gait impairment due to MS. Further research is required to determine if expanded training or modified design of this powered orthosis can be effective at improving endurance walking performance in persons with gait impairment due to MS. PMID: 28778829 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - August 1, 2017 Category: Physics Authors: Boes MK, Bollaert RE, Kesler R, Learmonth YC, Islam M, Petrucci MN, Motl RW, Hsiao-Wecksler ET Tags: Arch Phys Med Rehabil Source Type: research

Abstracts.
Authors: PMID: 28758688 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 31, 2017 Category: Physics Tags: Med Phys Source Type: research

Feasibility of 3D printed air slab diode caps for small field dosimetry.
Abstract Commercial diode detectors used for small field dosimetry introduce a field-size-dependent over-response relative to an ideal, water-equivalent dosimeter due to high density components in the body of the detector. An air gap above the detector introduces a field-size-dependent under-response, and can be used to offset the field-size-dependent detector over-response. Other groups have reported experimental validation of caps containing air gaps for use with several types of diodes in small fields. This paper examines two designs for 3D printed diode air caps for the stereotactic field diode (SFD)-a cap con...
Source: Physica Medica - July 31, 2017 Category: Physics Authors: Perrett B, Charles P, Markwell T, Kairn T, Crowe S Tags: Australas Phys Eng Sci Med Source Type: research

A simple and efficient algorithm operating with linear time for MCEEG data compression.
Abstract Popularisation of electroencephalograph (EEG) signals in diversified fields have increased the need for devices capable of operating at lower power and storage requirements. This has led to a great deal of research in data compression, that can address (a) low latency in the coding of the signal, (b) reduced hardware and software dependencies, (c) quantify the system anomalies, and (d) effectively reconstruct the compressed signal. This paper proposes a computationally simple and novel coding scheme named spatial pseudo codec (SPC), to achieve lossy to near lossless compression of multichannel EEG (MCEEG)...
Source: Physica Medica - July 31, 2017 Category: Physics Authors: Titus G, Sudhakar MS Tags: Australas Phys Eng Sci Med Source Type: research

Fully automatic, multi-organ segmentation in normal whole body magnetic resonance imaging (MRI), using classification forests (CFs), convolutional neural networks (CNNs) and a multi-atlas (MA) approach.
CONCLUSIONS: Three state-of-the-art algorithms were developed and used to automatically segment major organs and bones in whole body MRI; good agreement to manual segmentations performed by clinical MRI experts was observed. CNNs perform favourably, when using T2w volumes as input. Using multi-modal MRI data as input to CNNs did not improve the segmentation performance. This article is protected by copyright. All rights reserved. PMID: 28756622 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 30, 2017 Category: Physics Authors: Lavdas I, Glocker B, Kamnitsas K, Rueckert D, Mair H, Sandhu A, Taylor SA, Aboagye EO, Rockall AG Tags: Med Phys Source Type: research

Aquatic Exercises in the Treatment of Low Back Pain: A Systematic Review of the Literature and Meta-Analysis of Eight Studies.
CONCLUSIONS: Aquatic exercise can statistically significantly reduce pain and increase physical function in patients with low back pain. Further high-quality investigations on a larger scale are required to confirm the results. PMID: 28759476 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Shi Z, Zhou H, Lu L, Pan B, Wei Z, Yao X, Kang Y, Liu L, Feng S Tags: Am J Phys Med Rehabil Source Type: research

Second-Order Peer Reviews of Clinically Relevant Articles for the Physiatrist: Additional Weekend Therapy May Reduce Length of Rehabilitation Stay After Stroke: A Meta-analysis of Individual Patient Data.
PMID: 28759477 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Teasell R, Cotoi A Tags: Am J Phys Med Rehabil Source Type: research

The variation in frequency locations in Doppler ultrasound spectra for maximum blood flow velocities in narrowed vessels.
This study assessed the variation in the frequency locations in the Doppler ultrasound spectra for the maximum blood flow velocities of in vessels with different degrees of bilaterally axisymmetric stenosis. This was done by comparing the relationship between the velocity distributions and corresponding Doppler power spectra. First, a geometric vessel model with axisymmetric stenosis was established. This made it possible to obtain the blood flow velocity distributions for different degrees of stenosis from the solutions of the Navier-Stokes equations. Then, the Doppler spectra were calculated for the entire segment of the...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Zhang Y, Zhang Y, Gao L, Deng L, Hu X, Zhang K, Li H Tags: Med Eng Phys Source Type: research

Development of an acoustic measurement protocol to monitor acetabular implant fixation in cementless total hip Arthroplasty: A preliminary study.
This study presents a novel real-time method based on acoustic signals to monitor the acetabular implant fixation in cementless total hip arthroplasty. Twelve acoustic in vitro experiments were performed on three types of bone models; a simple bone block model, an artificial pelvic model and a cadaveric model. A custom made beam was screwed onto the implant which functioned as a sound enhancer and insertor. At each insertion step an acoustic measurement was performed. A significant acoustic resonance frequency shift was observed during the insertion process for the different bone models; 250 Hz (35%, second bending mode)...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Goossens Q, Leuridan S, Henyš P, Roosen J, Pastrav L, Mulier M, Desmet W, Denis K, Vander Sloten J Tags: Med Eng Phys Source Type: research

"Pulmonary embolism diagnostics of pregnant patients: What is the recommended clinical pathway considering the clinical value and associated radiation risks of available imaging tests?"
"Pulmonary embolism diagnostics of pregnant patients: What is the recommended clinical pathway considering the clinical value and associated radiation risks of available imaging tests?" Phys Med. 2017 Jul 28;: Authors: Papadakis GZ, Karantanas AH, Perisinakis K Abstract Pulmonary embolism (PE) during pregnancy remains the leading preventable cause of maternal morbidity and mortality in the developed countries. Diagnosis of PE in pregnant patients is a challenging clinical problem, since pregnancy-related physiologic changes can mimic signs and symptoms of PE. Patient mismanagement may result...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Papadakis GZ, Karantanas AH, Perisinakis K Tags: Phys Med Source Type: research

A comparison of treatment plan quality between Tri-Co-60 intensity modulated radiation therapy and volumetric modulated arc therapy for cervical cancer.
CONCLUSIONS: Owing to the target margin reduction capability, the tri-Co-60 IMRT plans were more favorable than the VMAT plans for cervical cancer. PMID: 28760506 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Park JM, Park SY, Kim JI, Kang HC, Choi CH Tags: Phys Med Source Type: research

Use of a second-dose calculation algorithm to check dosimetric parameters for the dose distribution of a first-dose calculation algorithm for lung SBRT plans.
CONCLUSIONS: This study quantitatively demonstrated that the dosimetric performance of AXB is almost equal to that of XVMC, compared with that of AAA. Therefore, AXB is a more appropriate algorithm for an independent verification method for XVMC. PMID: 28760507 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Tsuruta Y, Nakamura M, Miyabe Y, Nakata M, Ishihara Y, Mukumoto N, Akimoto M, Ono T, Yano S, Higashimura K, Matsuo Y, Mizowaki T, Hiraoka M Tags: Phys Med Source Type: research

Effects of gamma-low dose irradiation on skin flap survival in rats.
Abstract PURPOSE: Skin flap necrosis due to inadequate blood supply has remained a common postoperative problem in constructive surgery. As low-dose irradiation (LDI) has been shown to promote the wound-healing process, this study aims to investigate whether LDI could increase neovascularization and skin flap survival in rats. METHODS: McFarlane flaps were created in 21 male rats, which were divided into one control and two treatment groups (Ta and Tb). The treatment groups received a whole body single dose of 100cGy gamma ray irradiation before (Tb) and after (Ta) flap surgery. The flap survival area was eva...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Karimipour M, Amanzade V, Jabbari N, Farjah GH Tags: Phys Med Source Type: research

Kinesiophobia and its Association with Health Related Quality of Life Across Injury Locations.
CONCLUSION: Kinesiophobia levels appear elevated and negatively associated with health-related quality of life at initial physical therapy evaluation regardless of injury location. These findings suggest physical therapists in outpatient orthopaedic settings should implement routine kinesiophobia assessment and provide stratified care based on kinesiophobia levels across musculoskeletal conditions. PMID: 28760572 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Goldberg P, Zeppieri G, Bialosky J, Bocchino C, van den Boogaard J, Tillman S, Chmielewski TL Tags: Arch Phys Med Rehabil Source Type: research

Work productivity loss after mild traumatic brain injury.
CONCLUSION: Even in patients who RTW after MTBI, detailed assessment revealed underemployment and productivity loss associated with residual symptoms and psychiatric complications. PMID: 28760573 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Silverberg ND, Panenka WJ, Iverson GL Tags: Arch Phys Med Rehabil Source Type: research

Physical Function after Total Knee Replacement: An observational study describing outcomes in a small group of women from China and the United States.
Abstract OBJECTIVE: To describe physical function before and six months after Total Knee Replacement (TKR) in a small sample of women from China and the United States (US). PARTICIPANTS: 60 women after TKR from China and the US Design, Setting, Outcomes: Data was from an observational study of TKR outcomes in Newark, Delaware (US group) and a control group after TKR in Beijing (China group). Both groups followed the same Osteoarthritis Research Society International (OARSI) protocols for the six-minute walk and 30-second chair stand. We compared physical function prior to TKR and six months after using linear...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: White DK, Li Z, Zhang Y, Marmon AR, Master H, Zeni J, Niu J, Jiang L, Zhang S, Lin J Tags: Arch Phys Med Rehabil Source Type: research

A Bayesian approach to solve proton stopping powers from noisy multi-energy CT data.
CONCLUSION: The Bayesian ETD is shown to be more robust against noise than similar methods and a promising approach to extract SPR from noisy DECT data. In the advent of commercially available multi-energy CT or photon-counting CT scanners, the Bayesian ETD is expected to allow extracting more information and improve the precision of proton therapy beyond DECT. This article is protected by copyright. All rights reserved. PMID: 28752662 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Lalonde A, Bär E, Bouchard H Tags: Med Phys Source Type: research

A deep learning framework for supporting the classification of breast lesions in ultrasound images.
Abstract In this research, we exploit the deep learning framework to differentiate the distinctive types of lesions and nodules in breast acquired with ultrasound imaging. A biopsy proven benchmarking dataset was built from 5151 patients' cases containing a total of 7408 ultrasound breast images, representative of semi-automatically segmented lesions associated with masses. The data set is composed of 4254 benign and 3154 malignant lesions. The developed method comprises histogram equalization, image cropping, and margin augmentation. GoogLeNet Convolutionary Neural Network(CNN) is trained to t...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Han S, Kang HK, Jeong JY, Park MH, Kim W, Bang WC, Seong YK Tags: Phys Med Biol Source Type: research

Performance evaluation of a high-resolution brain PET scanner using four-layer MPPC DOI detectors.
Abstract A high-resolution positron emission tomography (PET) scanner dedicated to brain studies was developed, and its performance was evaluated. A four-layer depth of interaction (DOI) detector was designed; it contains five detector units axially lined up per layer board. Each of the detector units consists of a LYSO scintillator array finely segmented (1.2 mm) and an 8 × 8 array of multi-pixel photon counters (MPPCs). The new scanner was designed to form a detector ring of 430-mm diameter with 32 detector modules and 168 detector rings with a 1.2-mm pitch. The transaxial and axial field of views (FOVs) a...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Watanabe M, Saito A, Isobe T, Ote K, Yamada R, Moriya T, Omura T Tags: Phys Med Biol Source Type: research

sMLACF: a generalized expectation-maximization algorithm for TOF-PET to reconstruct the activity and attenuation simultaneously.
Abstract The 'simultaneous Maximum-Likelihood Attenuation Correction Factors' (sMLACF) algorithm presented here, is an iterative algorithm to calculate the maximum-likelihood (ML) estimate of the activity 'λ' and the attenuation factors 'a' in time-of-flight (TOF) positron emission tomography (PET), and this from emission data only. Hence sMLACF is an alternative to the MLACF algorithm. sMLACF is derived using the generalized expectation-maximization (GEM) principle by introducing an appropriate set of complete data. The resulting iteration step yields a simultaneous update of 'λ' and 'a' which, in a...
Source: Physica Medica - July 28, 2017 Category: Physics Authors: Salvo K, Defrise M Tags: Phys Med Biol Source Type: research

Dosimetric evaluation of a commercial proton spot scanning Monte-Carlo dose algorithm: comparisons against measurements and simulations.
Conclusions: RS-MC algorithm demonstrated improved dosimetric accuracy over RS-PBA in presence of homogenous, heterogeneous and anthropomorphic phantoms. The computation performance of RS-MC was similar to RS-PBA algorithm. For complex disease sites like breast, head and neck, and lung cancer, the RS-MC algorithm will provide significantly more accurate treatment planning. . PMID: 28749373 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Saini J, Maes D, Egan A, Bowen SR, St James S, Janson M, Wong T, Bloch C Tags: Phys Med Biol Source Type: research

Towards fast online intrafraction replanning for free-breathing stereotactic body radiation therapy with the MR-linac.
Abstract The hybrid MRI-radiotherapy machines, like the MR-linac (Elekta AB, Stockholm, Sweden) installed at the UMC Utrecht (Utrecht, The Netherlands), will be able to provide real-time patient imaging during treatment. In order to take advantage of the system's capabilities and enable online adaptive treatments, a new generation of software should be developed, ranging from motion estimation to treatment plan adaptation. In this work we present a proof of principle adaptive pipeline designed for high precision Stereotactic Body Radiation Therapy (SBRT) suitable for sites affected by respiratory motion, like Rena...
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Kontaxis C, Bol GH, Stemkens B, Glitzner M, Prins FM, Kerkmeijer LGW, Lagendijk JJW, Raaymakers BW Tags: Phys Med Biol Source Type: research

Compton scatter tomography in TOF-PET.
In this study, a novel approach is proposed to reconstruct activity distribution using the scattered data on the PET system. For each single scattering coincidence, scattering angle can be determined by recorded energy of the detected photons and then possible locations of scattering can be calculated based on the scattering angle. Geometry equations show that these sites lie on two arcs in 2D mode or surface of a prolate spheroid in 3D mode passing through the pair detector elements. The proposed method uses a novel and flexible technique to estimate source origin locations from the possible scattering locations using the...
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Hemmati H, Kamali-Asl A, Ay M, Ghafarian P Tags: Phys Med Biol Source Type: research

Theoretical limits to sensitivity and resolution in magneto-acousto electrical tomography.
In this study, the performance of Magneto-Acousto Electrical Tomography (MAET) method is investigated quantitatively by considering interrelations between its sensitivity, resolution and conductivity contrast. An analytical solution for the forward problem of MAET is derived for two-dimensional (2D) concentric bodies by Separation of Variables Method. The electric potential and the acoustic pressure are separated to their angular and radial components. The series coefficients for these solutions are obtained by their respective boundary conditions. The electric potential on the boundary is related to the acoustic boundary ...
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Ghalichi E, Gencer NG Tags: Phys Med Biol Source Type: research

Performance evaluation of a collapsed cone dose calculation algorithm for HDR Ir-192 of APBI treatments.
Abstract PURPOSE: Most dose calculations for HDR brachytherapy treatments are based on the AAPM-TG43 formalism. Because patient's anatomy, heterogeneities and applicator shielding are not considered, the dose calculation based on this formalism is inaccurate in some cases. Alternatively, Collapsed Cone (CC) methods as well as Monte Carlo (MC) algorithms belong to the model based dose calculation algorithms, which are expected to improve the accuracy of calculated dose distributions. In this work, the performance of a CC algorithm, ACE in Oncentra Brachy 4.5 (ACE 4.5), has been investigated by comparing the calcula...
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Terribilini D, Vitzthum V, Volken W, Frei D, Loessl K, van Veelen B, Manser P, Fix MK Tags: Med Phys Source Type: research

Does myofascial and trigger point treatment reduce pain and analgesic intake in patients undergoing OnabotulinumtoxinA injection due to chronic intractable migraine? A pilot, single-blind randomized controlled trial.
CONCLUSIONS: Manipulative techniques aimed at reducing peripheral nociceptive triggers might add value in the management of chronic migraine symptoms and lower acute medication use. CLINICAL REHABILITATION IMPACT: An interdisciplinary approach comprising pharmacological and non- pharmacological strategies can reduce analgesic consumption and myofascial dysfunction symptoms in chronic migraine patients. PMID: 28750504 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Gandolfi M, Geroin C, Valè N, Marchioretto F, Turrina A, Dimitrova E, Tamburin S, Serina A, Castellazzi P, Meschieri A, Ricard F, Saltuari L, Picelli A, Smania N Tags: Eur J Phys Rehabil Med Source Type: research

Lower limb muscle activity during gait in individuals with hearing loss.
The objective of this study was to investigate the electrical activity of lower limb muscles during gait in an able-bodied control group and in deaf individuals. Thirty male children were equally divided into a control group and a group of deaf children. A portable EMG system was used to record the activity of the bilateral tibialis anterior, gastrocnemius medialis and vastus lateralis muscles during barefoot walking with and without dual task. For EMG analysis, the average root mean square (RMS) values of the five trials were calculated and then normalized based on the peak RMS obtained by the maximum isometric voluntary ...
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Majlesi M, Azadian E, Farahpour N, Jafarnezhad AA, Rashedi H Tags: Australas Phys Eng Sci Med Source Type: research

Polymer gel dosimeters with PVA-GA matrix.
Abstract Properties of a new polymer gel with cross-linked polyvinyl alcohol as a gelatinous matrix were investigated. The new polymer gel dosimeter was named PVABAT. The irradiation was performed using a calibrated (60)Co beam. The dose responses of the PVABAT formulations were quantified with MRI transverse relaxation rate (R2) measurements. The results show that the PVABAT gel responds linearly to the absorbed dose for doses from 30 up to 45 Gy. The maximal amount of [Formula: see text] of PVABAT polymer gel dosimeter was about 0.19 Gy which was indicated on a better resolution in comparison with prev...
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Abtahi SMM, Sadeghi Abandansari H Tags: Australas Phys Eng Sci Med Source Type: research

A new scoring system for evaluating coronary artery disease by using blood pressure variability.
In conclusion, the new scoring system based on ABPM has potential as a non-invasive tool for evaluating CAD. PMID: 28752321 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 27, 2017 Category: Physics Authors: Zhu W, Qiu J, Ma L, Lei H, Cai Z, Zhao H, Deng Y, Ma J, Xu L Tags: Australas Phys Eng Sci Med Source Type: research

Classification of changes occurring in lung patient during radiotherapy using relative γ analysis and hidden Markov models.
CONCLUSION: We showed a method to classify patients during the course of radiotherapy based on relative changes in EPID images and a hidden Markov model. Information obtained through this automated classification can complement the clinical information collected during treatment and help identify patients in need of a plan adaptation. This article is protected by copyright. All rights reserved. PMID: 28744863 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 26, 2017 Category: Physics Authors: Varfalvy N, Piron O, Cyr MF, Dagnault A, Archambault L Tags: Med Phys Source Type: research

Fast dose optimization for rotating shield brachytherapy.
CONCLUSIONS: POGS reduced treatment plan optimization time approximately 18 times for RSBT with similar HR-CTV D90, organ at risk (OAR) D2cc values, and EQD2 values compared to CPLEX, which is significant progress toward clinical translation of RSBT. This article is protected by copyright. All rights reserved. PMID: 28744870 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 26, 2017 Category: Physics Authors: Cho M, Wu X, Dadkhah H, Yi J, Flynn RT, Kim Y, Xu W Tags: Med Phys Source Type: research

Reliability of bounce drop jump parameters within elite male rugby players.
Abstract BACKGROUND: The aims of the study were to investigate the number of familiarisation sessions required to establish reliability of the bounce drop jump (BDJ) and subsequent reliability once familiarisation is achieved. METHOD: Seventeen trained male athletes completed 4 BDJs in 4 separate testing sessions. Force-time data from a 20 cm BDJ was obtained using two force plates (ensuring ground contact
Source: Physica Medica - July 25, 2017 Category: Physics Authors: Costley L, Wallace E, Johnston M, Kennedy R Tags: J Sports Med Phys Fitness Source Type: research

Effects of taurine on markers of muscle damage, inflammatory response and physical performance in triathletes.
CONCLUSIONS: Taurine supplementation did not provide benefits on performance and muscle damage in triathletes. PMID: 28745470 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 25, 2017 Category: Physics Authors: Martinez Galan BS, Giolo de Carvalho F, Carvalho Santos P, Bucken Gobbi R, Kalva-Filho C, Papoti M, Sanchez Silva A, Freitas EC Tags: J Sports Med Phys Fitness Source Type: research

Visual control in basketball shooting under exertion conditions.
CONCLUSIONS: The findings suggest that physical exertion may reduce oculomotor efficiency during aiming at a distant target. Moreover, stationary and dynamic shots require different gaze behavior strategies. PMID: 28745471 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 25, 2017 Category: Physics Authors: Zwierko T, Popowczak M, Woźniak J, Rokita A Tags: J Sports Med Phys Fitness Source Type: research

Effect of eight weeks of upper-body plyometric training during the competitive season on professional female volleyball players.
CONCLUSIONS: Data showed the plyometric exercises that were tested could be used by performance-level volleyball teams to improve spike speed. The experimental group increased their upper-body maximal strength, their power application, and spike speed. PMID: 28745472 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 25, 2017 Category: Physics Authors: Valades D, Palao JM, Femia P, Ureña A Tags: J Sports Med Phys Fitness Source Type: research

Does the aerobic threshold correlate with the maximal fat oxidation rate in short stage treadmill tests?
Abstract BACKGROUND: The aim of this study was to identify the exercise intensity that elicited the highest rate of fat utilization (FATmax) and to assess its relationship with the aerobic threshold (AeT) in male athletes. We hypothesized existence of high correlation of these two parameters when a short-staged graded treadmill test with AeT identified through breath-by-breath gas exchange analysis was used. METHODS: Fifty-six trained male athletes (age 25.6 ± 3.4 y, height 197.8 ± 5.6 cm, body mass 98.5 ± 6.6 kg) participated in the study. Pearson correlation coefficient (r) and effect s...
Source: Physica Medica - July 25, 2017 Category: Physics Authors: Peric R, Meucci M, Bourdon PC, Nikolovski Z Tags: J Sports Med Phys Fitness Source Type: research

The use of metabolic power to assess physical demands in soccer: how does it differ from the traditional approach through speed running?
CONCLUSIONS: The MP and energy expenditure reported differences at medium-low intensity compared to the speed running traditional approach between playing positions. However, the other intensities did not report differences compared to the traditional approach in the different playing positions. PMID: 28745474 [PubMed - as supplied by publisher] (Source: Physica Medica)
Source: Physica Medica - July 25, 2017 Category: Physics Authors: Martínez-Cabrera FI, Núñez-Sánchez FJ Tags: J Sports Med Phys Fitness Source Type: research