نتایج جستجو برای: photostimulable phosphor plate
تعداد نتایج: 76788 فیلتر نتایج به سال:
The objective of the present study was to determine the reproducibility of the pixel values obtained with the Digora system (Soredex, Finland). Exposures were standardized, with variation in exposure and scanning time of two photostimulable phosphor plates containing a stepwedge image. The smallest variation in pixel values ranged from 50 to 75%, with the widest variations being observed in les...
OBJECTIVES This study aimed to assess the diagnostic value of conventional and digital radiography for detection of cavitated and non-cavitated proximal caries. MATERIALS AND METHODS Fifty extracted human premolars and molars were mounted in a silicone block. Charge-coupled device (CCD) and photostimulable phosphor plate (PSP) receptors and intra-oral films were exposed with 60 and 70 kVp wit...
Computed radiography (CR) is a digital radiographic technique, which uses very similar equipment to conventional radiography except that in place of a film to create the latent image, an imaging plate (IP) made of a photostimulable phosphor is used [1]. CR systems are commonly used in medical applications since they have proven reliability over more than two decades. Conversely, the NDT communi...
OBJECTIVES The optimal goal of radiography is to provide high-quality diagnostic images with the least patient radiation dose. The aim of this study was to evaluate the accuracy of cone-beam computed tomography (CBCT) and intraoral photostimulable phosphor plate (PSP) digital and film-based conventional radiography for detection of artificial cancellous bone defects. MATERIALS AND METHODS Fiv...
Radiography plays an important role in detection of interproximal caries. The aim of study is to compare diagnostic ability of photo stimulable phosphor (PSP) with direct measurement using stereomicroscope in detecting proximal caries. Hundred proximal surfaces of 50 extracted human posterior teeth were radiographed with dental X-ray unit. The image receptors used was storage phosphor plate Vis...
OBJECTIVE The objective of this study was to compare the technical errors of intraoral radiographs exposed on film v photostimulable phosphor (PSP) plates. METHODS The intraoral radiographic images exposed on phantoms from preclinical practical exams of dental and dental hygiene students were used. Each exam consisted of 10 designated periapical and bitewing views. A total of 107 film sets an...
This study evaluated the technique errors of full mouth series exposed with two intraoral radiography receptor systems; traditional film-based and PSP-based (photostimulable phosphor) receptors. Full mouth series (n=405) were randomly selected: three series per each student for film-based (n=81) and PSP-based (n=102). All images (1514 film and 1754 PSP images) were evaluated in four categories ...
OBJECTIVE The purpose of this in vitro study was to explore the radiopacity of composite resins and bonding materials using film and phosphor plates. METHODS Nine composite dental resin specimens and human tooth slices were exposed together with an aluminium stepwedge using dental film and phosphor plates. Eight dentin bonding specimens were prepared and exposed in a similar manner. Their rad...
Objective The aim of this study was to compare the diagnostic performance convolutional neural networks (CNNs) with human observers for detection simulated periapical lesions on radiographs. Study Design Ten sockets were prepared in bovine ribs. Periapical defects 3 sizes sequentially created. radiographs acquired each socket no lesion and size a photostimulable storage phosphor system. Radiogr...
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