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Australasian Physical & Engineering Sciences in Medicine

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https://www.readbyqxmd.com/read/30448974/author-index-volume-41
#1
(no author information available yet)
No abstract text is available yet for this article.
November 17, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30443828/multiband-ultra-thin-flexible-on-body-transceivers-for-wearable-health-informatics
#2
Mubasher Ali, Junaid Zafar, Haroon Zafar, Martin O'Halloran, Faisal Sharif
Substantial concentration has been associated to the monitoring of vital signs and human activity using wireless body area networks. However, one of the key technical challenges is to characterize an optimized transceiver geometry for desired isolation/bandwidth and specific absorption rate (SAR) characteristics, independent of transceiver chip on-body location. A microwave performance evaluation of monopole wearable transceiver was completed and results presented. A novel on-body antenna transceiver was designed, simulated and fabricated using an ultra-thin substrate RO 3010 (h = 250 µm) that ensures compactness and enhanced flexibility...
November 15, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30406923/a-prospective-study-of-weekly-intensity-modulated-radiation-therapy-plan-adaptation-for-head-and-neck-cancer-improved-target-coverage-and-organ-at-risk-sparing
#3
F Aly, A A Miller, M G Jameson, P E Metcalfe
This prospective study of weekly CT scanning and plan adaption during H&N IMRT reports on the frequency of plan adaptations based on dosimetric differences between original and re-optimised IMRT plans. The volumetric and geometric change occurring in target volumes and salivary glands is also described. Ten H&N cancer patients underwent weekly planning CT imaging and re-optimisation of the IMRT plan if PTV or OAR coverage was unacceptable. Comparisons of PTV and parotid gland dosimetry between the original and adaptive plans were made...
November 8, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30406922/afomp-policy-number-6-code-of-ethics-for-medical-physicists-in-afomp-countries
#4
REVIEW
W H Round, K H Ng, L Rodriguez, K Thayalan, F Tang, R Srivastava, S Fukuda, A Krisanachinda, X Deng, Y Han
This policy statement, which is the sixth of a series of documents prepared by the Asia-Oceania Federation of Organizations for Medical Physics (AFOMP) Professional Development Committee, gives guidance on how medical physicists in AFOMP countries should conduct themselves in an ethical manner in their professional practice (Ng et al. in Australas Phys Eng Sci Med 32:175-179, 2009; Round et al. in Australas Phys Eng Sci Med 33:7-10, 2010; Round et al. in Australas Phys Eng Sci Med 34:303-307, 2011; Round et al...
November 8, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30406921/standardised-quality-control-and-quality-assurance-activities-in-radiology-across-australia-and-new-zealand-in-search-of-the-holy-grail
#5
EDITORIAL
Amanda Perdomo
No abstract text is available yet for this article.
November 8, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30397899/qr-code-based-patient-data-protection-in-ecg-steganography
#6
Ponnambalam Mathivanan, Sam Edward Jero, Palaniappan Ramu, Athi Balaji Ganesh
Connected health enables patient centric interventions resulting in better healthcare and hence better living. In order to accomplish this, bio-signals, medical and diagnosis information are shared and accessed by multiple actors and it is important to protect the privacy of patient data. Steganography is widely used to protect patient data by hiding it in the medical information. Current work investigates ECG steganography using Discrete Wavelet Transform (DWT) and Quick Response (QR) code. Steganography deteriorates the ECG signal and it is important to minimize this deterioration to preserve diagnosability...
November 5, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30390213/quantifying-clinical-improvements-in-patients-with-depression-under-the-treatment-of-transcranial-direct-current-stimulation-using-event-related-potentials
#7
Yeganeh Shahsavar, Majid Ghoshuni, Ali Talaei
The main goal of this study was to assess the changes in brain activities of patients with severe depression by applying transcranial direct current stimulation (tDCS) using event related potentials (ERPs). Seven patients (four males, with the mean age 34.85 ± 4.25) were asked to fill out Beck's depression questionnaires. EEG signals of subjects were recorded during Stroop test. This test entailed 360 stimulations, which included 120 congruent, 120 incongruent, and 120 neutral stimulations lasting for 12 min...
November 2, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30390212/women-and-men-in-the-australasian-college-of-physical-scientists-and-engineers-in-medicine-workforce-survey
#8
Eva Bezak, Roksolana Suchowerska, Elizabeth Claridge Mackonis, Heath Pillen, Anna Ralston, Annette Haworth, Natalka Suchowerska
A survey was designed to determine aspirations, motivations and workplace experiences of both female and male members of the Australasian College of Physical Scientists and Engineers in Medicine (ACPSEM). The survey collected both quantitate and qualitative data, including open ended questions. This paper reports the survey's qualitative results. The research was approved by Ethics at University of South Australia and endorsed by ACPSEM. All 205 women (30% of total membership) and 440 men were invited to complete the survey online...
November 2, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30387002/an-automated-scheduling-system-for-radiotherapy-physicist-on-call-using-monte-carlo-simulation
#9
Xavier Bauza, James C L Chow
An automated physicist on-call program was developed to support emergency radiotherapy in a cancer centre. A computer program was created to generate an on-call schedule according to the credit score approach. Monte Carlo method was used to simulate the number of treatment cases per shift of on-call physicists (total 32) based on 8 years of data (2010-2017), and the "Most Credit First" criteria was used to justify the order of physicists in the schedule. Evaluation of the old schedule, in which the physicists were randomly assigned, with the new one was carried out...
November 1, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30387001/winning-images-from-the-photography-in-medical-physics-pimp-competition
#10
(no author information available yet)
No abstract text is available yet for this article.
November 1, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30377948/automatic-segmentation-of-vertebrae-in-3d-ct-images-using-adaptive-fast-3d-pulse-coupled-neural-networks
#11
Mina Zareie, Hossein Parsaei, Saba Amiri, Malik Shahzad Awan, Mohsen Ghofrani
Two systems are presented for segmentation of vertebrae in a 3D computed tomography (CT) image. The first method extracts seven features from each voxel and uses a multi-layer perceptron neural network (MLPNN) to classify the voxel as vertebrae or background. In the second method, the segmentation is completed in two steps: first, a newly developed adaptive pulse coupled neural network (APCNN) directly applied to a given image segments vertebrae, then the result is refined using a median filter. In the developed APCNN, the values for the user-defined parameters of the pulse coupled neural networks (PCNN) are adaptively adjusted for each image individually, instead of using one value for all images as in conventional PCNN...
October 30, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30374771/an-adaptive-multiscale-anisotropic-diffusion-regularized-image-reconstruction-method-for-digital-breast-tomosynthesis
#12
Yangchuan Liu, Cishen Zhang, Wenru Li, Yuguo Tang, Xin Gao
As a special case of tomography, digital breast tomosynthesis (DBT) can realize quasi-3D image reconstruction for breast lesion detection from few-view and limited-angle projection data. For DBT image reconstruction, iterative algorithms are needed to suppress artifacts due to undersampling, and adaptive regularizations are necessary for preserving the edges of masses and calcifications. This paper presents a novel reconstruction method by regularizing projection onto convex sets (POCS) with multiscale Tikhonov-total variation (MTTV)...
October 29, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30374770/an-effective-approach-to-classify-epileptic-eeg-signal-using-local-neighbor-gradient-pattern-transformation-methods
#13
N J Sairamya, S Thomas George, R Balakrishnan, M S P Subathra
Electroencephalographic (EEG) signal records the neuronal activity in the brain and it is used in the diagnosis of epileptic seizure activities. Human inspection of non-stationary EEG signal for diagnosing epilepsy is cumbersome, time-consuming and inaccurate. In this paper an effective automatic approach to detect epilepsy using two feature extraction techniques namely local neighbor gradient pattern (LNGP) and symmetrically weighted local neighbor gradient pattern (SWLNGP) are proposed. Extracted features are fed into machine learning algorithms like k-nearest neighbor (k-NN), quadratic linear discriminant analysis, support vector machine, ensemble classifier and artificial neural network (ANN) to classify the EEG signals...
October 29, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30361918/australasian-recommendations-for-quality-assurance-in-kilovoltage-radiation-therapy-from-the-kilovoltage-dosimetry-working-group-of-the-australasian-college-of-physical-scientists-and-engineers-in-medicine
#14
Robin Hill, Brendan Healy, Duncan Butler, David Odgers, Simran Gill, Jessica Lye, Tina Gorjiara, Dane Pope, Brendan Hill
The Australasian College of Physical Scientists and Engineers in Medicine (ACPSEM) Radiation Oncology Specialty Group (ROSG) formed a series of working groups to develop recommendations for guidance of radiation oncology medical physics practice within the Australasian setting. These recommendations provide a standard for safe work practices and quality control. It is the responsibility of the medical physicist to ensure that locally available equipment and procedures are sufficiently sensitive to establish compliance...
October 25, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30361917/retrospective-analysis-of-multi-institutional-patient-specific-treatment-planning-results-of-high-dose-rate-intracavitary-brachytherapy-for-gynecological-cancer-using-v-100
#15
Tetsuya Watanabe, Hisayuki Miyashita, Ryoichi Notake, Keisuke Todoroki, Go Nakajima, Kana Washizu, Nobuko Utsumi, Shogo Hatanaka, Masatsugu Hariu, Takafumi Yamano, Keiichiro Nishimura, Munefumi Shimbo, Takeo Takahashi
The objective of this study was to clarify the usefuleness of the K parameters of the independent verification method using V100% (the volume of water receiving 100% of the prescription dose) for institutions implementing the high-dose-rate (HDR) intracavitary brachytherapy for gynecological cancer. The data of 249 plans of 11 institutions in Japan were used, and the constant K value obtained by a parameter fit for single-192 Ir, two-192 Ir, and three-192 Ir systems was calculated. The predicted total dwell time calculated using the constant K value was defined as Tpr , and the total dwell time calculated using a radiation treatment planning system was defined as TRTP ...
October 25, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30341673/characterization-of-epid-software-for-vmat-transit-dosimetry
#16
Marco Esposito, Andrea Bruschi, Paolo Bastiani, Alessandro Ghirelli, Silvia Pini, Serenella Russo, Giovanna Zatelli
Dosimetry check (DC) is a commercial software that allows reconstruction of 3D dose distributions using transit electronic portal imaging device (EPID) images. In this work, we evaluated the suitability of DC software for volumetric modulated arc therapy (VMAT) transit dosimetry. The volumetric gamma agreement index 3%/3 mm between twenty VMAT dose distributions reconstructed by DC and calculated with treatment planning system (TPS) were compared to those obtained using PTW OCTAVIUS®4D to assess DC accuracy in VMAT quality assurance (QA)...
October 19, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30338496/automatic-anesthesia-depth-staging-using-entropy-measures-and-relative-power-of-electroencephalogram-frequency-bands
#17
Mercedeh Jahanseir, Seyed Kamaledin Setarehdan, Sirous Momenzadeh
Many of the surgeries performed under general anesthesia are aided by electroencephalogram (EEG) monitoring. With increased focus on detecting the anesthesia states of patients in the course of surgery, more attention has been paid to analyzing the power spectra and entropy measures of EEG signal during anesthesia. In this paper, by using the relative power of EEG frequency bands and the EEG entropy measures, a new method for detecting the depth of anesthesia states has been presented based on the least squares support vector machine (LS-SVM) classifiers...
October 18, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30338495/multi-class-eeg-classification-of-motor-imagery-signal-by-finding-optimal-time-segments-and-features-using-snr-based-mutual-information
#18
Mahmoud Mahmoudi, Mousa Shamsi
The electroencephalogram signals are used to distinguish different motor imagery tasks in brain-computer interfaces. In most studies, in order to classify the EEG signals recorded in a cue-guided BCI paradigm, time segments for feature extraction after the onset of the visual cue were selected manually. In addition, in these studies the authors have selected a single identical time segment for different subjects. The present study emphasized on the inter-individual variability and difference between different motor imagery tasks as the potential source of erroneous results and used mutual information and the subject specific time interval to overcome this problem...
October 18, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30338494/multichannel-eeg-based-inter-ictal-seizures-detection-using-teager-energy-with-backpropagation-neural-network-classifier
#19
N Sriraam, Kadeeja Tamanna, Leena Narayan, Mehraj Khanum, S Raghu, A S Hegde, Anjani Bhushan Kumar
A long-term multichannel electroencephalogram recording plays a crucial role in recognizing the epileptic seizure activities from the brain lobes. This research study investigates the automated detection of epileptic seizures from multichannel electroencephalogram recordings using Teager energy feature. A supervised back-propagation neural network model was implemented to classify the inter-ictal seizures. The study was conducted on multichannel electroencephalogram data that was obtained from Institute of Neuroscience, Ramaiah Memorial Hospital, Bengaluru, India, after ethical clearance from the from the Institutional Ethics Board...
October 18, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/30338493/estimating-transmitted-power-density-from-mobile-phone-an-epidemiological-pilot-study-with-a-software-modified-phone
#20
Chhavi Raj Bhatt, Mary Redmayne, Michael J Abramson, Malcolm R Sim, Christopher Brzozek, Berihun M Zeleke, Geza Benke
The aims of this study were to evaluate the weekly and annual cumulative radiofrequency-electromagnetic field (RF-EMF) exposure attributed to mobile phone (MP) use, and assess whether a novel app (Quanta Monitor™) could be employed in a small human sample to characterise the RF-EMF exposures associated with the use of MPs. Ten participants provided their two months' daily objective data on their MP exposures (i.e. transmitted and received power densities) attributed to different modes of MP usage such as cellular calls, cellular data and Wi-Fi...
October 18, 2018: Australasian Physical & Engineering Sciences in Medicine
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