Plates should not be removed from their sheaths until just before the scanning procedure and unsheathed plates should not be overlapped with anything, advice from the manufacturers must be considered for the ambient light intensity and plates should be scanned as soon as possible after exposure Intraobserver reliability was analyzed with kappa analyses.īrighter radiographic image than usual, which is almost always correctable with image adjustment toolsĪmbient light exposure of the unsheathed plate because of delayed scanning, tolerable spontaneous releasing of the electrons that form the latent image and reduced output signal that causes incorrect initial image density optimization
21 (IBM Corp., New York, NY formerly SPSS Inc., Chicago, IL), and the frequency and percentage of image errors and artefacts were determined.
Statistical analyses were performed with IBM SPSS ® Statistics v. Selected 50 radiographs were revaluated after 2 weeks for the determination of intraobserver reliability. All of the radiographs were evaluated by one observer. These radiographs were individually evaluated for the absence or presence of all defined image errors and artefacts. In the second part, 2100 intraoral radiographs were collected from the patient records in September 2015, which is the following month of major revision of the plates being used. Possible causes and solutions of these errors and artefacts were determined through consideration of the materials and image acquisition process of faulty radiographs. In the first part, different types of image errors and artefacts observed on intraoral radiographs during 2014–15 were detected and defined. The evaluation was performed in the reporting room that has semi-dark lighting condition.
Ambient light definition software#
The images were transferred to the HBYS Hospital information management system computer program (Turcasoft Software Ltd., Samsun, Turkey) and evaluated on a 20.1-inch Dome GX2MP Plus monitor (NDS Surgical Imaging, LLC, San Jose, CA). All radiographs were obtained with the bisecting angle technique using VistaScan image plates and scanning procedures were performed with a VistaScan Combi scanner using a standard scanning mode that allowed for a 50-µm pixel size and a 10-lp/mm theoretical spatial resolution (Dürr Dental GmbH & Co. The radiographic database of Ondokuz Mayıs University, Faculty of Dentistry, Department of Dentomaxillofacial Radiology, was used for this study.Įxposures were performed with two Sirona Heliodent Plus dental X-ray machines with parameters of 60 kVp and 7 mA (Sirona Dental Systems GmbH, Bensheim, Germany). The study protocol was approved by the university institutional review board. The causes and solutions of the errors and artefacts which are specific to PSP-based intraoral imaging have also been discussed. Evaluation includes a large number of PSP-based radiographs acquired in one university dental hospital.
Ambient light definition psp#
The aim of this study was to detect and determine image error and artefact types in intraoral radiographs obtained with PSP technology, place them in an appropriate classification and retrospectively analyze the detected PSP-specific image artefacts. Determining and clarifying the mechanisms of these mistakes is essential in overcoming these errors and artefacts. Thus, the optimal radiographic examination for an area of interest cannot be performed, which may lead to a misdiagnosis. Incorrect manipulations and technical errors during both acquisition and processing of the images may cause distinctive radiographic errors and artefacts. The integration of these relatively new imaging technologies in dental radiographic practices has brought about innovations that have to be understood for a proper examination. Advantages of CR include having cordless and flexible plates, having similar structural features to well-known conventional films, being easily manipulated, the option of changing image adjustments via software, lower dose requirements, a wide dose latitude, the elimination of chemical processes, an ease of storage, sharing and replication. Generally, PSP plate-based radiographic systems are named as “computed radiography” (CR) and the term “digital radiography” is preferred for the solid-state detector-based imaging. Photostimulable phosphor (PSP) plates are still widely used as receptors in intraoral radiography.These image receptors allow indirect digital image acquisition more specifically, after the exposure, latent image occurs on the plate, it is then converted to a digital radiographic four image via a scanning device.
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