abstract：:Compression techniques are vital for efficient storage and fast transfer of medical image data. The existing compression techniques take significant amount of time for performing encoding and decoding and hence the purpose of compression is not fully satisfied. In this paper a rapid 4-D lossy compression method constr...

journal_title：Australasian physical & engineering sciences in medicine

authors： Uma Vetri Selvi G,Nadarajan R

更新日期：2015-12-01 00:00:00

abstract：:Bipolar disorder (BD) is a severe psychiatric disorder and has two common types: type I and type II. Early diagnosis of the subtypes is very challenging particularly in adolescence. In this study, 38 adolescents are participated including 18 patients with BD I and 20 patients with BD II. The electroencephalogram signa...

journal_title：Australasian physical & engineering sciences in medicine

authors： Khaleghi A,Sheikhani A,Mohammadi MR,Nasrabadi AM,Vand SR,Zarafshan H,Moeini M

更新日期：2015-12-01 00:00:00

abstract：:A continuous positive airway pressure (CPAP) device is considered one of the most effective treatments for obstructive sleep apnea (OSA). However, many patients receiving this treatment complain of mask discomfort and other issues. Therefore, this study aimed to develop a customized nasal mask cushion to reduce the di...

journal_title：Australasian physical & engineering sciences in medicine

authors： Hsu DY,Cheng YL,Bien MY,Lee HC

更新日期：2015-12-01 00:00:00

abstract：:Glaucoma is a chronic and irreversible neuro-degenerative disease in which the neuro-retinal nerve that connects the eye to the brain (optic nerve) is progressively damaged and patients suffer from vision loss and blindness. The timely detection and treatment of glaucoma is very crucial to save patient's vision. Compu...

journal_title：Australasian physical & engineering sciences in medicine

authors： Akram MU,Tariq A,Khalid S,Javed MY,Abbas S,Yasin UU

更新日期：2015-12-01 00:00:00

abstract：:It was the aim of this work to assess and track the workload, working conditions and professional recognition of radiation oncology medical physicists (ROMPs) in the Asia Pacific region over time. In this third survey since 2008, a structured questionnaire was mailed in 2014 to 22 senior medical physicists representin...

journal_title：Australasian physical & engineering sciences in medicine

authors： Kron T,Azhari HA,Voon EO,Cheung KY,Ravindran P,Soejoko D,Inamura K,Han Y,Ung NM,TsedenIsh B,Win UM,Srivastava R,Marsh S,Farrukh S,Rodriguez L,Kuo M,Baggarley S,DilipKumara AH,Lee CC,Krisanachinda A,Nguyen XC,Ng

更新日期：2015-09-01 00:00:00

abstract：:This paper proposes a novel approach to detect epilepsy seizures by using Electroencephalography (EEG), which is one of the most common methods for the diagnosis of epilepsy, based on 1-Dimension Local Binary Pattern (1D-LBP) and grey relational analysis (GRA) methods. The main aim of this paper is to evaluate and val...

journal_title：Australasian physical & engineering sciences in medicine

authors： Kaya Y

更新日期：2015-09-01 00:00:00

abstract：:Segmentation of different tissues is one of the initial and most critical tasks in different aspects of medical image processing. Manual segmentation of brain images resulted from magnetic resonance imaging is time consuming, so automatic image segmentation is widely used in this area. Ensemble based algorithms are ve...

journal_title：Australasian physical & engineering sciences in medicine

authors： Ahmadvand A,Sharififar M,Daliri MR

更新日期：2015-06-01 00:00:00

abstract：:Given that there is increasing recognition of the effect that sub-millimetre changes in collimator position can have on radiotherapy beam dosimetry, this study aimed to evaluate the potential variability in small field collimation that may exist between otherwise matched linacs. Field sizes and field output factors we...

journal_title：Australasian physical & engineering sciences in medicine

authors： Kairn T,Asena A,Charles PH,Hill B,Langton CM,Middlebrook ND,Moylan R,Trapp JV

更新日期：2015-06-01 00:00:00

abstract：:The Australasian College of Physical Scientists and Engineers in Medicine (ACPSEM) radiation oncology specialty group (ROSG) formed a series of working groups in 2011 to develop recommendations for guidance of radiation oncology medical physics practice within the Australasian setting. These recommendations are intend...

journal_title：Australasian physical & engineering sciences in medicine

authors： Nelligan R,Bailey M,Tran T,Baldwin Z,ACPSEM total body irradiation working group.

更新日期：2015-06-01 00:00:00

abstract：:The Australian Clinical Dosimetry Service (ACDS) has demonstrated the capacity to perform a basic dosimetry audit on all radiotherapy clinics across Australia. During the ACDS's three and a half year trial the majority of the audits were performed using optically stimulated luminescence dosimeters (OSLD) mailed to fac...

journal_title：Australasian physical & engineering sciences in medicine

authors： Alves AD,Lye J,Kenny J,Dunn L,Lehmann J,Cole A,Kron T,Butler D,Johnston P,Williams I

更新日期：2015-03-01 00:00:00

abstract：:This study was aimed to improve the surgical accuracy of plating and screwing for complicated tibial plateau fracture assisted by 3D implants library and 3D-printed navigational template. Clinical cases were performed whereby complicated tibial plateau fractures were imaged using computed tomography and reconstructed ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Huang H,Hsieh MF,Zhang G,Ouyang H,Zeng C,Yan B,Xu J,Yang Y,Wu Z,Huang W

更新日期：2015-03-01 00:00:00

abstract：:The umbilical cord is part of the fetus and generally includes one umbilical vein (UV) and two umbilical arteries (UAs). As the saphenous vein and UV are the most commonly used veins for the coronary artery disease treatment as a coronary artery bypass graft (CABG), understating the mechanical properties of UV has a k...

journal_title：Australasian physical & engineering sciences in medicine

authors： Karimi A,Navidbakhsh M

更新日期：2014-12-01 00:00:00

abstract：:Conventional laser accelerated proton beam has broad energy spectra. It is not suitable for clinical use directly, so it is necessary for employing energy selection system. However, in the conventional laser accelerated proton system, the intensity of the proton beams in the low energy regime is higher than that in th...

journal_title：Australasian physical & engineering sciences in medicine

authors： Yoo SH,Cho I,Cho S,Song Y,Jung WG,Kim DH,Shin D,Lee SB,Pae KH,Park SY

更新日期：2014-12-01 00:00:00

abstract：:In this paper, the hemodynamic characteristics inside a physiologically correct three-dimensional LV model using fluid structure interaction scheme are examined under various heart beat conditions during early filling wave (E-wave), diastasis and atrial contraction wave (A-wave). The time dependent and incompressible ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Arefin MS,Morsi YS

更新日期：2014-06-01 00:00:00

abstract：:Wavelet theory is emerging as one of the prevalent tool in signal and image processing applications. However, the most suitable mother wavelet for these applications is still a relative question mark amongst researchers. Selection of best mother wavelet through parameterization leads to better findings for the analysi...

journal_title：Australasian physical & engineering sciences in medicine

authors： Saraswathy J,Hariharan M,Nadarajaw T,Khairunizam W,Yaacob S

更新日期：2014-06-01 00:00:00

abstract：:Gravity associated with postural changes has a strong bearing on haemodynamics of blood flow in arteries. Its effect on stenosed cases has not been widely investigated. In the present study, variation observed in blood flow during postural changes is investigated for different conditions like standing, sleeping and he...

journal_title：Australasian physical & engineering sciences in medicine

authors： Raghuvir Pai B,Ayachit A,Abdul Khader SM,Ahmed KA,Rao VR,Kamath SG,Gupta PD

更新日期：2014-03-01 00:00:00

abstract：:Cricket bowling generates forces with torques on the upper limb muscles and makes the biceps brachii (BB) muscle vulnerable to overuse injury. The aim of this study was to investigate whether there are differences in the amplitude of the EMG signal of the BB muscle during fast and spin delivery, during the seven phase...

journal_title：Australasian physical & engineering sciences in medicine

authors： Ahamed NU,Sundaraj K,Ahmad B,Rahman M,Ali MA,Islam MA

更新日期：2014-03-01 00:00:00

abstract：:The Australasian College of Physical Scientists and Engineers in Medicine (ACPSEM) Radiation Oncology Specialty Group (ROSG) formed a series of working groups in 2011 to develop position papers for guidance of radiation oncology medical physics practice within the Australasian setting. These position papers are intend...

journal_title：Australasian physical & engineering sciences in medicine

authors： Shakeshaft J,Perez M,Tremethick L,Ceylan A,Bailey M

更新日期：2014-03-01 00:00:00

abstract：:The computed tomography (CT) imaging artefacts that metallic medical implants produce in surrounding tissues are usually contoured and over-ridden during radiotherapy treatment planning. In cases where radiotherapy treatment beams unavoidably pass though implants, it is especially important to understand the imaging a...

journal_title：Australasian physical & engineering sciences in medicine

authors： Kairn T,Crowe SB,Fogg P,Trapp JV

更新日期：2013-06-01 00:00:00

abstract：:An automated computer-aided diagnosis system is developed to classify benign and malignant thyroid nodules using multi-stained fine needle aspiration biopsy (FNAB) cytological images. In the first phase, the image segmentation is performed to remove the background staining information and retain the appropriate foregr...

journal_title：Australasian physical & engineering sciences in medicine

authors： Gopinath B,Shanthi N

更新日期：2013-06-01 00:00:00

abstract：:Rats are often used in the electromagnetic field (EMF) exposure experiments. In the study for the effect of 900 MHz EMF exposure on learning and memory in SD rats, the specific absorption rate (SAR) and the temperature rise in the rat head are numerically evaluated. The digital anatomical model of a SD rat is reconstr...

journal_title：Australasian physical & engineering sciences in medicine

authors： Yang L,Hao D,Wu S,Zhong R,Zeng Y

更新日期：2013-06-01 00:00:00

abstract：:Currently, a software-based second check dose calculation for helical tomotherapy (HT) is not available. The goal of this study is to evaluate the dose calculation accuracy of the in-house software using EGS4/MCSIM Monte Carlo environment against the treatment planning system calculations. In-house software was used t...

journal_title：Australasian physical & engineering sciences in medicine

authors： Dzintars E,Stathakis S,Mavroidis P,Sadeghi A,Papanikolaou N

更新日期：2012-12-01 00:00:00

abstract：:The performance of an image registration (IR) software was evaluated for automatically detecting known errors simulated through the movement of ExactCouch using an onboard imager. Twenty-seven set-up errors (11 translations, 10 rotations, 6 translation and rotation) were simulated by introducing offset up to ± 15 mm i...

journal_title：Australasian physical & engineering sciences in medicine

authors： Sharma SD,Dongre P,Mhatre V,Heigrujam M

更新日期：2012-09-01 00:00:00

abstract：:In this study, we assessed the accuracy of surface doses determined by direct measurement and treatment planning system (TPS) calculations, relative to benchmark Monte Carlo (MC) doses calculated at 70 μm for a 6 MV, 10 × 10 cm clinical radiotherapy beam. In a homogeneous phantom with both open and fixed wedged fields...

journal_title：Australasian physical & engineering sciences in medicine

authors： Kim JH,Hill R,Kuncic Z

更新日期：2012-09-01 00:00:00

abstract：:Accuracy of dwell position and reproducibility of dwell time are critical in high dose rate (HDR) brachytherapy. A phantom was designed to verify dwell position and dwell time reproducibility for an Ir-192 HDR stepping source using Computed Radiography (CR). The central part of the phantom, incorporating thin alternat...

journal_title：Australasian physical & engineering sciences in medicine

authors： Madebo M,Pillainayagam J,Kron T,Franich R

更新日期：2012-09-01 00:00:00

abstract：:The measurement of absorbed dose to water in a solid-phantom may require a conversion factor because it may not be radiologically equivalent to water. One phantom developed for the use of dosimetry is a solid water, RW3 white-polystyrene material by IBA. This has a lower mass-energy absorption coefficient than water d...

journal_title：Australasian physical & engineering sciences in medicine

authors： Seet KY,Hanlon PM,Charles PH

更新日期：2011-12-01 00:00:00

abstract：:The dosimetric features of the Fricke dosimeter in clinical linear accelerator beams are considered. Experimental data were obtained using various nominal energies 6 and 18 MV, 12 and 15 MeV, including the (60)Co γ-ray beam. The calibration of the dosimeters was performed using the ionization chamber as a reference do...

journal_title：Australasian physical & engineering sciences in medicine

authors： Moussous O,Khoudri S,Benguerba M

更新日期：2011-12-01 00:00:00

abstract：:In-phantom figures of merit of the radiobiological dose distribution are the main criteria for evaluation of the boron neutron capture therapy (BNCT) plan and neutron beam evaluation. Since in BNCT there are several reactions, which contribute to the total dose of the tissue, the calculation of the dose distribution i...

journal_title：Australasian physical & engineering sciences in medicine

authors： Ahangari R,Afarideh H

更新日期：2011-12-01 00:00:00

abstract：:AFOMP recognizes that clinical medical physicists should demonstrate that they are competent to practice their profession by obtaining appropriate education, training and supervised experience in the specialties of medical physics in which they practice, as well as having a basic knowledge of other specialties. To hel...

journal_title：Australasian physical & engineering sciences in medicine

authors： Round WH,Ng KH,Healy B,Rodriguez L,Thayalan K,Tang F,Fukuda S,Srivastava R,Krisanachinda A,Shiau AC,Deng X,Han Y

更新日期：2011-09-01 00:00:00

abstract：:Radiochromic film is a self developing two-dimensional dosimeter system that is widely used in radiotherapy. Since its development some 40 years ago many improvements have been made; however the sensitivity can vary across the film and a non-linear dose response remains. The former can be addressed using a double expo...

journal_title：Australasian physical & engineering sciences in medicine

authors： Roozen K,Kron T,Haworth A,Franich R

更新日期：2011-06-01 00:00:00

abstract：:Despite ongoing active research, the role of the radiation bystander effect in modifying local tissue response to an ionising radiation dose remains unclear. The present study aims to provide new insight by simulating the diffusion-mediated inter-cellular communication processes in 2D and 3D cell-like structures to ca...

journal_title：Australasian physical & engineering sciences in medicine

authors： Moulton CR,Fleming AJ,Ebert MA

更新日期：2011-04-01 00:00:00

abstract：:Diamond detectors are particularly well suited for dosimetry applications in radiotherapy for reasons including near-tissue equivalence and high-spatial resolution resulting from small sensitive volumes. However, these detectors have not become commonplace due to high cost and poor availability arising from the need f...

journal_title：Australasian physical & engineering sciences in medicine

authors： Lansley SP,Betzel GT,Metcalfe P,Reinisch L,Meyer J

更新日期：2010-12-01 00:00:00

abstract：:Numerical simulation is performed to demonstrate that hemodynamic factors are significant determinants for the development of a vascular pathology. Experimental measurements by particle image velocimetry are carried out to validate the credibility of the computational approach. We present a study for determining compl...

journal_title：Australasian physical & engineering sciences in medicine

authors： Cheung SC,Wong KK,Yeoh GH,Yang W,Tu J,Beare R,Phan T

更新日期：2010-12-01 00:00:00

abstract：:Post installation acceptance testing is vital to demonstrate that the equipment meets the vendor's specification and is suitable for clinical studies. The test procedures described in the NEMA NU 2-2001 document form the basis of vendor performance specifications of PET scanners and hence are also appropriate for acce...

journal_title：Australasian physical & engineering sciences in medicine

authors： Sathiakumar C,Som S,Eberl S,Lin P

更新日期：2010-06-01 00:00:00

abstract：:A new PTW advanced Markus ionization chamber has been implemented in IMRT fields, to measure surface dose at ICRU and ICRP reference depth of 0.07 mm [ICRU Report 39, Determination of dose equivalents resulting from external radiation sources, 1985; ICRP Publication 60, 1990 recommendations of the International Commis...

journal_title：Australasian physical & engineering sciences in medicine

authors： Chen FQ,Gupta R,Metcalfe P

更新日期：2010-03-01 00:00:00

abstract：:Lead attenuation characteristic curves are often consulted in premises radiation shielding assessments employing the non-destructive testing (NDT) method. This study developed lead attenuation characteristics mathematical models for the radionuclide Co-57. These models take into account the statistical variation of th...

journal_title：Australasian physical & engineering sciences in medicine

authors： Lee KL,Schick D

更新日期：2009-12-01 00:00:00

abstract：:Non-linear loading of the utilities supply introduced significant electromagnetic field (EMF) interference severe enough to disrupt electrocardiograph (ECG) monitoring and recordings in the new Emergency Department (ED) at the Royal Melbourne Hospital (RMH). This interference was evident even though standard Mu-metal ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Davie WJ,Fowler MJ,Koumoundouros E

更新日期：2009-09-01 00:00:00

abstract：:A simple and rapid technique to measure the proton beam energy in the external beam line of a medical cyclotron has been examined. A stack of 0.1 mm thick high purity copper (Cu) foils was bombarded and the relative activity of 65Zn produced in each foil was compared to a computational model that predicted activity, b...

journal_title：Australasian physical & engineering sciences in medicine

authors： Burrage JW,Asad AH,Fox RA,Price RI,Campbell AM,Siddiqui S

更新日期：2009-06-01 00:00:00

abstract：:The effective energy of diagnostic X-rays is important for quality assurance (QA) and quality control (QC). However, the half-value layer (HVL), which is necessary to evaluate the effective energy, is not ubiquitously monitored because ionization-chamber dosimetry is time-consuming and complicated. To verify the appli...

journal_title：Australasian physical & engineering sciences in medicine

authors： Gotanda T,Katsuda T,Gotanda R,Tabuchi A,Yamamoto K,Kuwano T,Yatake H,Takeda Y

更新日期：2009-03-01 00:00:00

abstract：:The reference air kerma rate from 192Ir High Dose Rate (HDR) brachytherapy sources can be measured using a suitably calibrated Farmer chamber and an appropriate in-air calibration jig. When a primary standard for 192Ir gamma rays is available, a calibration coefficient for the chamber and jig combination can be determ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Butler D,Haworth A,Sander T,Todd S

更新日期：2008-12-01 00:00:00