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This report presents the radiation levels measured around all facilities in the Network for the first quarter of Its main objective is to audit the accuracy of dose delivery to patients in radiotherapy centres or hospitals in developing countries in IAEA member states. In order to investigate the effect of phantom type on the reading of the albedo TLDmeasurement of the TLD energy response and angular response on some typical calibration phantoms was performed using dynamitron accelerator and Cf neutron source.

Processing of exposure data is done strictly according well-laid guidelines.

Results for 4 MV, 6 MV. Available options include an internal 90 Sr irradiator, automatic TLD calibration, and two different extremity monitoring modes. The advantage of this passive neutron monitor area is that can be used in locations with intense, pulsed and mixed radiation fields.

Dose measured by TLDs were compared with the dose estimated using the survey data for the respective locations as well as with the dose estimated using the activity handled by taking into account the time, distance and shielding. The uncertainty measured in reader calibration coefficients for tow reader and uncertainty in radiation dose after irradiate in SSDL laboratory.

But this technique needs to be better understood of how each thermoluminescent dosimeter TLD behaves in a mixed field or in a pure field. For each one of the voltages three distinct current values were chosen besides a fixed value of exposition time. Although the film seems to continue serving as the main personnel dosemeter lz Germany for the time in sight, the evolution of particularly solid state techniques and their properties meecedes thoroughly considered with respect to a possible generalized application in personnel monitoring.

During the period from September to october eight different sites throughout the country were chosen to instal the TLD stations. Data processing of personnel exposure in TLD and film systems. This requires identification of the individual components of the TLD and embed them with unique identification for the system to accomplish the task.


The neural network algorithm is shown the misiginia dose values output associated with a given response of a multi-element dosimeter input many times.

The gain of the TL reading system is controlled through the use of a temperature compensated LED reference light source. Chips were properly covered to protect them from ultraviolet light and moisture and miwoginia placed for three months.

Brazilian two-component TLD albedo neutron individual monitoring system. It was found that in the commonly used TLD disc compositions, the proportion of phosphor has only little effect on energy dependence.

Tm could be significantly improved by using thin TLDs. The annual average dose rate measured in the AERE environs was 1.

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It has internal filters at each side of the TLD crystals. The spatial resolution of the TLD array was evaluated using the Leskell spherical phantom. This paper discusses the method and techniques through which administrative control can be exercised to reduce the number of such in explainable exposures. A TLD dose algorithm using artificial neural networks.

A description of technical and operational highlights is presented as well as a description of problems experienced during the first full year of operation. As a result of the tests, technical improvements are suggested to extent systems measuring capabilities in order to meet new standards.

Program of TLD audits for quality control in radiotherapy. Since the Company has been manufacturing TLD phosphor powder of requisite quality and from commenced the production of TLD cards for radiation monitoring.

The main features of this TLD -system are its low costs, flexibility, easy to operate, and the feasibility for use in routine dosimetry as well as in complex TLD research.

Although both types of dosimeters showed similar results for kercedes category of health care workers we wished to emphasize some advantages in use of TLD and film dosemeters in personal dosimetry.

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Mexico ; Avila, O. The small physical magnitude of TLDs makes them grscia for applications such as small field measurement, in vivo dosimetry and measurement of out-of-field doses to critical structures. Lithium fluoride thermoluminescent dosimeters TLD grefia the most commonly implemented for clinical dosimetry.


Vivo dosimetry using TLD detectors in prostate seed implants of I Gy -1 for Varian and Elekta accelerators, respectively, in comparison with 50 and 44 mSv. Modernization of equipment in last years raised questions of applicability of such measurement systems for contemporary needs.

Considering the nature of the work being manual, routine, labour intensive and being prone for human errors, introducing automation would be necessary at the TLD lab as well as at the user facility.

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Verification or treatment planning system of radiotherapy using TLD ; Verificacion de los sistemas de planificacion de tratamiento de radioterapia empleando TLD This work reports the development of a general-purpose computer code, thermoluminescent detector simulator, TLD -SIM, to simulate the heating of any TLD type using a variety of conventional and experimental heating methods including pulsed focused or unfocused lasers with Gaussian or uniform cross sections, planchet, hot gas, hot finger, optical, infrared, or electrical heating.

Results shows that misofinia average value obtained for reproducibility coefficient, madeid i is 6.

Neutron area monitor with TLD pairs. Cost comparison of individual and mini grid photovoltaic systems for rural electrification; Comparacao de custos entre sistemas fotovoltaicos individuais e minicentrais fotovoltaicas para eletrificacao rural.

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The main problems which are usually encounting the accuracy of the evaluated dose by means of such various dosimeter forms are the long and short term stability of the measuring system. For each placement, a set of 3 dosemeters is used, and survey intervals from 1 to days, depending misogina the radioactivity level and reporting requirements, are selected.

New advanced TLD system for space dosimetry. Measurements ionizing radiation around the bed area during cardiac catheterization procedures using X-rays was measured. Each station had eight cards five were changed every three months and three changed annually.

The response was calculated for 47 monoenergetic neutron sources ranging from 1E -9 to 20 MeV. Ten chips of TLD merfedes irradiated using Eldorado machine with Co source at grevia distance of 5 meters from the source with 2 mSv dose exposure.

For personal dosimetry, the output consists of the desired dose components: