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Australasian Physical & Engineering Sciences in Medicine

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https://www.readbyqxmd.com/read/29344782/accuracy-and-efficiency-of-published-film-dosimetry-techniques-using-a-flat-bed-scanner-and-ebt3-film
#1
E Spelleken, S B Crowe, B Sutherland, C Challens, T Kairn
Gafchromic EBT3 film is widely used for patient specific quality assurance of complex treatment plans. Film dosimetry techniques commonly involve the use of transmission scanning to produce TIFF files, which are analysed using a non-linear calibration relationship between the dose and red channel net optical density (netOD). Numerous film calibration techniques featured in the literature have not been independently verified or evaluated. A range of previously published film dosimetry techniques were re-evaluated, to identify whether these methods produce better results than the commonly-used non-linear, netOD method...
January 17, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29340946/standardisation-of-shielding-of-medical-x-ray-installations
#2
LETTER
Giovanni Bibbo
No abstract text is available yet for this article.
January 16, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29340945/electromagnetic-induction-sensor-for-dynamic-testing-of-coagulation-process
#3
Zhe Wang, Yuanhua Yu, Zhanjiang Yu, Qimeng Chen
With the increasing demand for coagulation POCT for patients in the surgery department or the ICU, rapid coagulation testing techniques and methods have drawn widespread attention from scholars and businessmen. This paper proposes the use of electromagnetic induction sensor probe for detection of dynamic process causing changes in the blood viscosity and density before and after coagulation based on the damped vibration principle, in order to evaluate the coagulation status. Utilizing the dynamic principle, the differential equation of vibration system comprising elastic support and electromagnetic induction device is established through sensor dynamic modeling...
January 16, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29335918/winning-images-from-the-photography-in-medical-physics-pimp-competition
#4
(no author information available yet)
No abstract text is available yet for this article.
January 15, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29318536/-revise-before-review-reject-without-review-reject-after-review-why-manuscripts-are-rejected
#5
EDITORIAL
Martin Caon
No abstract text is available yet for this article.
January 9, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29285615/application-of-image-recognition-based-automatic-hyphae-detection-in-fungal-keratitis
#6
Xuelian Wu, Yuan Tao, Qingchen Qiu, Xinyi Wu
The purpose of this study is to evaluate the accuracy of two methods in diagnosis of fungal keratitis, whereby one method is automatic hyphae detection based on images recognition and the other method is corneal smear. We evaluate the sensitivity and specificity of the method in diagnosis of fungal keratitis, which is automatic hyphae detection based on image recognition. We analyze the consistency of clinical symptoms and the density of hyphae, and perform quantification using the method of automatic hyphae detection based on image recognition...
December 28, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29264792/epileptic-seizure-detection-in-eeg-signal-using-machine-learning-techniques
#7
Abeg Kumar Jaiswal, Haider Banka
Epilepsy is a well-known nervous system disorder characterized by seizures. Electroencephalograms (EEGs), which capture brain neural activity, can detect epilepsy. Traditional methods for analyzing an EEG signal for epileptic seizure detection are time-consuming. Recently, several automated seizure detection frameworks using machine learning technique have been proposed to replace these traditional methods. The two basic steps involved in machine learning are feature extraction and classification. Feature extraction reduces the input pattern space by keeping informative features and the classifier assigns the appropriate class label...
December 20, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29260406/feasibility-study-for-production-and-quality-control-of-yb-175-as-a-byproduct-of-no-carrier-added-lu-177-preparation-for-radiolabeling-of-dotmp
#8
Nafise Salek, Simindokht Shirvani Arani, Ali Bahrami Samani, Sara Vosoghi, Mohsen Mehrabi
Skeletal uptake of β- emitters of DOTMP complexes is used for the bone pain palliation. In this study, two moderate energy β- emitters, 177Lu (T1/2 = 6.7 days, Eβmax = 497 keV) and 175Yb (T1/2 = 4.2 days, Eβmax = 480 keV), are considered as potential agents for the development of the bone-seeking radiopharmaceuticals. Since the specific activity of the radiolabelled carrier molecules should be high, the non-carrier-added (NCA) radionuclides have an effective role in nuclear medicine...
December 19, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29260405/a-principal-component-analysis-based-data-fusion-method-for-ecg-derived-respiration-from-single-lead-ecg
#9
Yue Gao, Hong Yan, Zhi Xu, Meng Xiao, Jinzhong Song
An ECG-derived respiration (EDR) algorithm based on principal component analysis (PCA) is presented and applied to derive the respiratory signals from single-lead ECG. The respiratory-induced variabilities of ECG features, P-peak amplitude, Q-peak amplitude, R-peak amplitude, S-peak amplitude, T-peak amplitude and RR-interval, are fused by PCA to yield a better surrogate respiratory signal than other methods. The method is evaluated on data from the MIT-BIH polysomnographic database and validated against a "gold standard" respiratory obtained from simultaneously recorded respiration data...
December 19, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29238919/a-novel-fully-automatic-multilevel-thresholding-technique-based-on-optimized-intuitionistic-fuzzy-sets-and-tsallis-entropy-for-mr-brain-tumor-image-segmentation
#10
Taranjit Kaur, Barjinder Singh Saini, Savita Gupta
In the present paper, a hybrid multilevel thresholding technique that combines intuitionistic fuzzy sets and tsallis entropy has been proposed for the automatic delineation of the tumor from magnetic resonance images having vague boundaries and poor contrast. This novel technique takes into account both the image histogram and the uncertainty information for the computation of multiple thresholds. The benefit of the methodology is that it provides fast and improved segmentation for the complex tumorous images with imprecise gray levels...
December 13, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29235058/author-index-volume-40
#11
(no author information available yet)
No abstract text is available yet for this article.
December 12, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29230656/development-of-gate-monte-carlo-simulation-for-a-csi-pixelated-gamma-camera-dedicated-to-high-resolution-animal-spect
#12
Payvand Taherparvar, Alireza Sadremomtaz
GATE is currently considered in scintigraphic imaging as a powerful tool to develop, design and optimize nuclear medicine modalities. This paper describes the GATE simulation of a pixelated gamma camera which is dedicated to high resolution of small animals imaging. It consists of a CsI(Na) crystal array coupled to position sensitive photomultiplier tube. The simulation model includes photon tracking through low energy high resolution hexagonal parallel holes collimator, CsI(Na) pixelated crystal, back-compartment, and camera shielding...
December 11, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29210020/effects-of-visual-and-cognitive-interference-on-joint-contributions-in-perturbed-standing-a-temporal-and-spectral-analysis
#13
Mohammed N Ashtiani, Mahmood-Reza Azghani
Postural balance requires using joint strategies which may be changed from normal conditions by interfering with the sensory information. The goal of the present study was to quantitatively evaluate the role of the joint mechanisms during perturbed stance. Visual and cognitive interference was imposed to sixteen healthy young males under rotational toes-down or up perturbations. Power spectral analysis was employed to distinguish the joint contribution and their in- or out-phase co-works. Results showed that addition of cognitive loads reduce the stability by increasing the center of mass (CoM) power to three times greater...
December 5, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29199375/using-percolation-networks-to-incorporate-spatial-dose-information-for-assessment-of-complication-probability-in-radiotherapy
#14
Nicholas Gale, Michael House, Martin A Ebert
This study investigates an extension of recent cluster based methods of assessing the probability of complication in normal organs following radiotherapy treatment which delivers a spatially non-uniform radiation dose distribution. Current methods of assessing this complication probability are spatially degenerate and do not adequately assess the contiguity of damage done to tissue. Therefore, new measures of assessing complication after radiation exposure have been proposed for parallel and serial type organs...
December 3, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29192392/risks-posed-by-neutron-contamination-in-high-energy-radiotherapy
#15
(no author information available yet)
No abstract text is available yet for this article.
November 30, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29189968/detection-of-electrocardiographic-changes-in-partial-epileptic-patients-using-local-binary-pattern-based-composite-feature
#16
T Sunil Kumar, Vivek Kanhangad
In this paper, we propose a novel method for detecting electrocardiographic (ECG) changes in partial epileptic patients using a composite feature set. At the core of our approach is a local binary pattern (LBP) based feature representation containing a set of statistical features derived from the distribution of LBPs of the ECG signal. In order to enhance the discriminating power, a set of statistical features are also extracted from the original ECG signal. The composite feature is then generated by combining the two homogeneous feature sets...
November 30, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29188555/medical-physics-publishing-in-a-changing-research-environment-the-australasian-physical-engineering-sciences-in-medicine-40th-anniversary-editorial
#17
EDITORIAL
Scott B Crowe, Tanya Kairn
No abstract text is available yet for this article.
November 29, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29188554/acknowledgement-of-apesm-reviewers-for-volume-40
#18
(no author information available yet)
No abstract text is available yet for this article.
November 29, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29159764/establishing-iaea-trs-457-diagnostic-x-ray-beam-qualities-at-the-australian-primary-standard-dosimetry-laboratory
#19
Kam L Lee, Duncan Butler, Tracy Bailey
This paper reports the process and findings in establishing the diagnostic beam qualities for the calibration of diagnostic dose meters in the Australian primary standard dosimetry laboratory at the Australian Radiation Protection and Nuclear Safety Agency, ARPANSA. A novel iterative method to achieve the RQR beam quality requirements described by IEC 61267 is presented. The correction factors for the primary standard free-air chamber and their uncertainties are reported. The calibration procedure with detailed uncertainty budget of a typical diagnostic ionisation chamber (model PTW 34060) is reported...
November 20, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29143909/design-of-an-optimum-poincar%C3%A3-plane-for-extracting-meaningful-samples-from-eeg-signals
#20
Babak Sharif, Amir Homayoun Jafari
Biosignals are considered as important sources of data for diagnosing and detecting abnormalities, and modeling dynamics in the body. These signals are usually analyzed using features taken from time and frequency domain. In theory' these dynamics can also be analyzed utilizing Poincaré plane that intersects system's trajectory. However' selecting an appropriate Poincaré plane is a crucial part of extracting best Poincaré samples. There is no unique way to choose a Poincaré plane' because it is highly dependent to the system dynamics...
November 16, 2017: Australasian Physical & Engineering Sciences in Medicine
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