abstract：:A general purpose, multi-channel digital data acquisition and analysis system (Amlab, Associative Measurements, Sydney) configured to collect and process physiological signals including electroencephalograph and blood pressure is described. Its advantages over analog and single-purpose instrumentation are discussed as...

journal_title：Australasian physical & engineering sciences in medicine

authors： Hall GL,Colditz PB

更新日期：1995-09-01 00:00:00

abstract：:Thermoluminescence dosimetry (TLD) is a versatile tool for the assessment of dose from ionising radiation. The wide variety of TLD materials and their different physical forms allow the determination of different radiation qualities at dose levels from microGy to kGy. Major advantages of TL dosimeters are their small ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Kron T

更新日期：1994-12-01 00:00:00

abstract：:The angular distribution for electron beams produced by the Siemens KD-2 linear accelerator has been found by simulating electron transport through the scattering foils and air using two methods: Fermi-Eyges multiple Coulomb scattering calculations, and EGS4 Monte Carlo simulations. Fermi-Eyges theory gives solutions ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Keall PJ,Hoban PW

更新日期：1994-09-01 00:00:00

abstract：:A new era has arrived for the Biomedical Engineering Department at the Royal Women's Hospital in Melbourne. We have developed a system to qualitatively test for intermittent or unconfirmed faults, associated with Bear Cub ventilators. Where previous testing has been inadequate, computer logging is now used to interfac...

journal_title：Australasian physical & engineering sciences in medicine

authors： Ghaly J,Smith AL

更新日期：1994-06-01 00:00:00

abstract：:X-ray imaging of the chest is challenging because of the large differences in x-ray attenuation between the mediastinal and lung regions of the chest. This large dynamic range of chest exit exposure, along with associated large changes in the scatter component of the beam, makes film based chest imaging difficult to o...

journal_title：Australasian physical & engineering sciences in medicine

authors： McLean D

更新日期：1993-12-01 00:00:00

abstract：:The quality of phantom materials is crucial for accurate dosimetry in radiotherapy. A wide range of factors such as density, electron density and elemental composition can influence the radiation properties, and hence the absorbed dose, of materials. New materials can be tested by direct measurements which requires co...

journal_title：Australasian physical & engineering sciences in medicine

authors： Keall P,Kron T,Hoban P

更新日期：1993-09-01 00:00:00

abstract：:Calculations have been performed of the kerma to radiographic film and to silicon from a number of x-ray spectra generated at 30 to 140 kV with tungsten and molybdenum targets. These results have been compared with the air-kerma values due to the same beams. It is concluded that both film and silicon can be used as pr...

journal_title：Australasian physical & engineering sciences in medicine

authors： Paix D

更新日期：1992-12-01 00:00:00

abstract：:Two software packages designed for automatic counting nuclear tracks are tested and compared. The image processing in the first package is divided into three parts segmentation, speckle elimination and removal of ill-formed track holes. The second package is also divided into three parts but the last part is modified ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Coakley K,Wong CF,Forbes K,Anh V

更新日期：1992-06-01 00:00:00

abstract：:A set of four 4 MV photon beam compensators were produced, one for each field of a Hodgkins Disease treatment plan. The resultant dose profiles at various depths were measured by an ion chamber in water and by Kodak X-Omat V film in a Solid Water phantom, and compared to the doses calculated by a GE RT/Plan treatment ...

journal_title：Australasian physical & engineering sciences in medicine

authors： Ralston AC,Francis JW

更新日期：1992-03-01 00:00:00

abstract：:Magnetic resonance imaging has become a key modality within the modern radiology department. In addition to the conventional slice images, three dimensional angiographic images, and quantitative flow measurements can be obtained. More recently methods have been developed which enable one to visualize the motion of obj...

journal_title：Australasian physical & engineering sciences in medicine

authors： McKinnon GC,Fischer SE,Maier SE

更新日期：1991-12-01 00:00:00

abstract：:Fractal dimension has been proposed as a useful method for characterizing medical images. The fractal dimension is calculated from the average radial power spectrum of the image. However, simpler methods of calculation have been proposed. This paper examines a very simple and easily implemented method which has been p...

journal_title：Australasian physical & engineering sciences in medicine

authors： Bartlett ML

更新日期：1991-09-01 00:00:00

abstract：:A 69 year old male was treated with an ablative dose of 3.7 GBq (100 mCi) of I131 for carcinoma of the thyroid and died 10 days after administration. The requirement for an autopsy and the level of radiation still present in the body necessitated the intervention of Radiation Safety Personnel to minimise support staff...

journal_title：Australasian physical & engineering sciences in medicine

authors： Wallace AB,Bush V

更新日期：1991-06-01 00:00:00

abstract：:Sometimes infusion pumps are used to deliver whole blood to patients. However, in doing so there is a potential for damage to red cells from mechanical stresses in the pump, resulting in haemolysis. In order to investigate the degree of haemolysis caused by different pumps and therefore their suitability for whole blo...

journal_title：Australasian physical & engineering sciences in medicine

authors： Denison M,U P,Bell R,Schuldreich R,Chaudhri MA

更新日期：1991-03-01 00:00:00

abstract：:Monte Carlo modelling of particle transport problems in medical radiation physics offers significant advantages over other techniques. Experiments can be performed without having to set up the physical situation, and "impossible" experiments can be performed, such as labelling multiple-scattered particles or simulatin...

journal_title：Australasian physical & engineering sciences in medicine

authors： Murray D

更新日期：1990-09-01 00:00:00

abstract：:A electrocardiogram (ECG) central station has been developed for the Intensive Care Unit at Christchurch Hospital. The system allows the selection and display of four ECGs selected from seven bedside monitors in the Unit. It also provides for automatic display, hard copy and audio alarm of ECG from any monitor which h...

journal_title：Australasian physical & engineering sciences in medicine

authors： Jans R,Elder AG,Jones RD,Fright WR,Bones PJ

更新日期：1990-03-01 00:00:00

abstract：:The knowledge of radiation dose at all points of interest within a patient's body is essential for the evaluation of treatment plans and for the judicious selection of the best one from among a set of competing plans. This paper discusses the physical and geometric aspects of radiation dose distribution calculations n...

journal_title：Australasian physical & engineering sciences in medicine

authors： Mohan R

更新日期：1989-12-01 00:00:00

abstract：:A set of computer programs to simulate diagnostic x-ray spectra has been developed according to the method of Birch and Marshall, with good agreement to published HPA data. These programs have been extended to simulate spectra generated with capacitor discharge x-ray units. The application of these programs has proved...

journal_title：Australasian physical & engineering sciences in medicine

authors： McLean D

更新日期：1989-09-01 00:00:00

abstract：:The reliability of the traditional Cobb angle index, which at present exhibits a wide range of reported values, was determined in this study and amounted to a within subject error of +/-4.3 degrees and a between subject error of +/-4.9 degrees. An attempt to pinpoint the source of this variability by investigating the...

journal_title：Australasian physical & engineering sciences in medicine

authors： Dutton KE,Jones TJ,Slinger BS,Scull ER,O'Connor J

更新日期：1989-03-01 00:00:00