Scanning resolution and the detection of approximal caries

A comparison of two compression algorithms and the detection of caries.

“…All radiographs were then scanned on a¯atbed scanner (Agfa DuoScan T1200; Agfa, Mortsel, Belgium), using the manufacturer's software (Agfa Fotolook 3.0; Agfa, Mortsel, Belgium) at eight bits and resolution set at 300 d.p.i. This resolution was chosen because in a previous study it was shown to be suitable for caries detection 19 and is similar to values used for intra-oral radiography storage phosphor plate scanners. The maximum density range of the scanner was D=3.4 and the gamma was set at 2.2, which proved to reproduce all gray levels of the original radiographs.…”

“…In total, 13 premolar blocks and 16 molar blocks were constructed with full details available in our previous study. 19 A total of 15 radiographs simulating the bitewing projection technique were obtained on conventional No. 2 size Ektaspeed Plus ®lms (Eastman Kodak, Rochester, NY, USA).…”

Evaluation of proximal caries in images resulting from different modes of radiographic digitalization

“…The studies that evaluate the use of digital radiographs for the observation of proximal caries are numerous. 3,[6][7][8] However, these studies are not only directed at the image quality, which influences the identification of the lesions, or at the ability and accuracy of the diagnoses using the digital image itself, but also at the performance of the above tools and of the adjustments after image processing. Special attention has been given to studies that assess the different stages of the process of scanning the image, including the selection means for the scanners, 3,9 the resolution settings and characteristics of entry into the scanning 6,7,10 and the formats and image features.…”

Digital images obtained with a digital camera are not associated with a loss of critical information – a preliminary study

“…11 It has been claimed that the reason digitising conventional radiographs using current high-grade digital cameras or scanners does not produce images of diagnostic quality is the need for improved resolution of viewing monitors. 12 Another study found that pulp areas within the crown molar were larger…”