Sensitometric control of roentgen film processorsįorsberg, H. processor temperature, which could be used for correcting dose in radiation dosimetry when film is used. A simple linear equation is provided for the changes in OD vs. The changes in processor temperature are directly related to the dose by a quadratic function. For both films, OD is a linear function of processor temperature in the range of 29.4–40.6Â☌ (85–105Â☏) for various dose ranges. At each temperature, a set of films was processed to evaluate OD at a given dose. The temperature of the processor was adjusted manually with increasing temperature. An automatic film processor (X-Omat 5000) was used for processing films. Multiple XV and EDR films were exposed in the reference condition (d max. There is very limited information on processor temperature, which is investigated in this study. Most of these parameters have been studied for Kodak XV and extended dose range (EDR) films used in radiation oncology. Optical density (OD) of a radiographic film plays an important role in radiation dosimetry, which depends on various parameters, including beam energy, depth, field size, film batch, dose, dose rate, air film interface, postexposure processing time, and temperature of the processor. Conclusion: This investigation clearly establishes the possibility of obtaining optimal sensitometric properties, despite using intensifying screens and films of different manufacturers, if spectral match is ensured.Įffect of processor temperature on film dosimetry Results: Results revealed increasing density, contrast and speed values with increasing processing times and temperatures of both green and blue sensitive films. Density, contrast and speed were calculated, using H and D curve. Later, maintaining constant processing temperature of 35Â☌ and five different processing times were engaged. Initially, at constant processing time of 2.5 min, five different processing temperatures were employed. These films were exposed to five different exposure times and subsequently processed in an automatic processor, using two different protocols. However, the films and the intensifying screens employed belonged to different manufacturers. Materials and Methods: Sixty green light sensitive and 60 blue light sensitive spectrally matched screen film combinations were used in the study.
The study also aimed to note the effect on sensitometric properties when mismatch occurred when using between the screen and film belonging to different manufacturers. Therefore, this research was conducted to recognize the effect of time and temperature variations of automatic processor on the sensitometric properties of blue and green light sensitive screen films. Radiographic films show variations in densities and contrast, with changes in processing conditions, and also film type, all of which are interdependent. (UK)ĭirectory of Open Access Journals (Sweden)įull Text Available Background: Accurate film processing is of paramount importance in acquiring a good diagnostic radiograph. Neujens, G.J.Īpparatus for unloading cassettes, containing exposed radiographic films, has means for unfastening the cassettes, an inclined pathway for gravity feeding and rotating feed members (rollers or belts) to propel the films into the processor. International Nuclear Information System (INIS) Radiographic film cassette unloading apparatus Suchetha N Malleshi Karthikeya Patil Mahima V Guledgudīackground: Accurate film processing is of paramount importance in acquiring a good diagnostic radiograph.
Optimization of sensitometric properties of blue and green light sensitive dental radiographic films employing an automatic processor
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