| 1. |
- Gårdestig, Magnus, 1973-, et al.
(author)
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Approved Personal Dosimetry for Medical Personnel using Direct Ion Storage Dosimeters
- 2009
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In: IFMBE Proceedings vol. 25/III. - Heidelberg : Springer. - 9783642038976 ; , s. 352-354
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Conference paper (other academic/artistic)abstract
- Dosimeters based on the Direct Ion Storage technology is used as the first approved electronic personal dosimeter in Sweden at the County Councils in Östergötland and Kalmar. TL dosimeters are replaced by DIS-1 dosimeters for all category A personnel at six hospitals with totally 300 dosimeter holders. The advantages are longer issue periods and instant read outs, appreciated by both the service and the holders
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| 2. |
- Gårdestig, Magnus, 1973-, et al.
(author)
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Estimations of effective dose in X-ray examinations derived from information stored in PACS
- 2005
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In: Radiological Protection in Transition. - Stockholm : Statens Strålskyddsinstitut. ; , s. 175-178
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Conference paper (other academic/artistic)abstract
- Information about each X-ray examination, in a modern digitized X-ray department is generated and stored in a PACS. Appropriate conversion factors, e.g. E/DAP, can be applied to separate projections and summed to the total effective dose for each examination. The objectives of the work were (i) to investigate the accuracy and precision in the calculated effective dose (ii) to identify data for registration of (1) patient dose, (2) exposure data, and (3) patient information (iii) to make it possible to derive dose statistics on patient level for documentation of diagnostic standard doses, optimizations, constancy checks, and future epidemiological studies. The effective doses were calculated using Monte Carlo based computer programs or by using tabulations. Conversion factors were calculated for different levels of information and the individual effective dose was compared to the most precise estimation. The results suggest that the accuracy in the estimations of effective dose increases by added information about the patient (gender, size) and how the examination was performed.
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| 3. |
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| 4. |
- Gårdestig, Magnus, 1973-, et al.
(author)
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RadiaCopter – UAS Gamma spectrometry for detection and identification of radioactive sources
- 2011
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In: XVI Conference of the NSFS, Reykjavik Iceland, 22-25 August 2011.
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Conference paper (other academic/artistic)abstract
- With an unmanned helicopter (UAS), known as drones, equipped with a gamma spectrometer, one can achieve both a high spatial resolution and good range, and be able to approach a radioactive source closely. Linköping University, Sweden, is proposing a microdrone system that will fill a gap between man-portable measurement systems and full-sized airborne systems, complementing the car-driven measurement systems. The system may play a unique role in many of our contingency scenarios in terms of accessibility, versatility, efficiency, and is advantageous from the viewpoint of radiation protection as it can be controlled at a safe distance.
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| 5. |
- Gårdestig, Magnus, 1973-, et al.
(author)
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RadiaDroid – Simulated radiation detection in smartphones
- 2011
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In: XVI Conference of the NSFS, Reykjavik Iceland, 22-25 August 2011.
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Conference paper (other academic/artistic)abstract
- RadiaDroid is an Android application that simulates the portable radiation detector Intensimeter 28 civ. and uses virtual radioactive sources, defined by GPS coordinates, radionuclide and activity. The trainees load a scenario and search the exercise area for radioactivity. The locations of sources and safety perimeters are reported. Creation of scenarios is possible in the application, but is facilitated in a PC tool that also presents the reports and the dose to the trainee.
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| 6. |
- Gårdestig, Magnus, 1973-, et al.
(author)
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RadiaX – Radiac Simulation for First Responders
- 2010
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In: Proceedings of Third European IRPA Congress 2010 June 14−16, Helsinki, Finland.
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Conference paper (other academic/artistic)abstract
- As a complement to the training of first responders in their preparedness for accidents and incidents involving radiation, a radiac simulation, called RadiaX, was developed. RadiaX has a threefold purpose; to teach (i) the handling of specific instruments, (ii) the proper procedures in missions and (iii) basic principles in radiation physics and radiation protection. The simulation is developed as a modification of Half-Life 2, a famous computer game.
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| 7. |
- Karlsson, Mattias P, et al.
(author)
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External radiation doses to biota : Monte Carlo dose model calculations
- 2011
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In: XVI Conference of the NSFS, Reykjavik Iceland, 22-25 August 2011.
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Conference paper (other academic/artistic)abstract
- Realistic and reliable dose models are required to estimate the radiological risks to non-human biota, in regions contaminated by radioactivity. To facilitate detailed dose calculations, a graphical user interface has been developed to the Monte Carlo N-Particle Transport code (MCNP): the TADPOLE editor (Terrestrial and Aquatic Dose assessment Program for Organisms in their Local Environment). The editor is intended for site and biota specific analyses of absorbed dose from external γ- and β- radiation. An experiment was performed in controlled, laboratory conditions as a first validation of the calculation models assigned by the editor. Measurements with TL-dosimeters yielded lower doses than was calculated by MCNP5 through the editor.
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| 8. |
- Norrman, Eva, et al.
(author)
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A clinical evaluation of the image quality computer program, CoCIQ
- 2005
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In: Journal of digital imaging. - : Springer Science and Business Media LLC. - 0897-1889 .- 1618-727X. ; 18:2, s. 138-144
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Journal article (peer-reviewed)abstract
- To provide an objective way of measuring image quality, a computer program was designed that automatically analyzes the test images of a contrast-detail (CD) phantom. The program gives a quantified measurement of image quality by calculating an Image Quality Figure (IQF). The aim of this work was to evaluate the program and adjust it to clinical situations in order to find the detectable level where the program gives a reliable figure of the contrast resolution. The program was applied on a large variety of images with lumbar spine and urographic parameters, from very low to very high image qualities. It was shown that the computer program produces IQFs with small variations and there were a strong linear statistical relation between the computerized evaluation and the evaluation performed by human observers (R2 = 0.98). This method offers a fast and easy way of conducting image quality evaluations.
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