نتایج جستجو برای: radiographic film classification
تعداد نتایج: 606083 فیلتر نتایج به سال:
Digital radiographic imaging systems, such as those using photostimulable storage phosphor, amorphous selenium, amorphous silicon, CCD, and MOSFET technology, can produce adequate image quality over a much broader range of exposure levels than that of screen/film imaging systems. In screen/film imaging, the final image brightness and contrast are indicative of over- and underexposure. In digita...
OBJECTIVE To determine the examination frequencies, quality of radiographic images and the entrance surface dose (ESD) in patients undergoing general radiographic examinations. DESIGN Prospective study on the device performance, film reject rate, patient dose, and image quality during the use of standard and fast speed film screen combination. SETTING Radiology Department of Kenyatta Nation...
Statement of Problem: Computer Sciences, in radiology, like other fields, is of high importance. It should also be noted that the accuracy of the technique and work conditions affects the radiographs information considerably. There for, in order to get more accurate diagnostic information, it seems necessary to investigate different digitized radiographic techniques and to compare them with the...
Microbiological analysis of radiographic films and tubes (2001in private and public dental radiographic centres in Yazd( oddini Ardakani* - Dr. S. Karamzadeh Motlagh** zDr. F. E * - Assistant professor of Oral Radiology Dept. Faculty of Dentistry Yazd University of Medical Sciences. ** - Dentist. Background and aim: In dental radiography, there are specific potentials to transmit infection. T...
Film calibration is time-consuming work when dose accuracy is essential while working in a range of photon scatter environments. This study uses the single-target single-hit model of film response to fit the calibration curves as a function of calibration method, processor condition, field size and depth. Kodak XV film was irradiated perpendicular to the beam axis in a solid water phantom. Stan...
Indications for the most frequently used imaging modalities in implant dentistry are proposed based on clinical need and biologic risk for the patient. To calculate the biologic risk, the authors carried out dose measurements. They demonstrated that the risk from a periapical radiograph is 20% of that from a panoramic radiograph. A panoramic radiograph and a series of 4 conventional tomographs ...
OBJECTIVE The objective of this study was to assess the impact of filmless operation and computed radiography on technologists' examination times compared with conventional film-based operation and film-screen radiography. CONCLUSION Compared with conventional film-screen operation, filmless operation using computed radiography was associated with a significant decrease in technologist examin...
The advances in digital imaging technology in dentistry have provided an alternative to film-based radiography and have given new options to detect periodontal bone loss. The purpose of this study was to compare inverted and unprocessed digitized radiographic imaging in periodontal bone loss measurements. Thirty-five film-based periapical radiographs of patients suffering from moderate to advan...
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