Results 201 to 210 of about 17,926 (236)
Some of the next articles are maybe not open access.
Dose reduction in panoramic radiography.
Dentomaxillofacial Radiology, 1993A modern programmable panoramic radiography unit was used to irradiate an anthropomorphic phantom in order to assess the variation in organ absorbed dose and calculated effective dose with program selection. The results of the measurements for five of the 12 programs available are presented, together with those obtained from an older, non-programmable ...
A R Lecomber, K Faulkner
openaire +2 more sources
Image quality in panoramic radiography.
Dentomaxillofacial Radiology, 1995Because of the increase in panoramic radiography it is important to know if image quality has improved with recent technical developments and if there are differences between the different machines that can justify the difference in price. Six conventional panoramic units and the two panoramic programs (dental and jaw panorama) of the Scanora (Soredex,
M Ahlqwist +2 more
openaire +2 more sources
Panoramic radiography in the examination of edentulous patients
The Journal of Prosthetic Dentistry, 1977A radiologic survey covering 4 years and using orthopantomography was made of 287 edentulous patients prior to denture construction. Orthopantomographs revealed 155 significant lesions in 41 per cent of the patients examined. Therefore, the use of panoramic radiography before any prosthetic procedure is undertaken seems justified.
Luc A. Perrelet +2 more
openaire +3 more sources
Dimensional reproduction in rotational panoramic radiography
Oral Surgery, Oral Medicine, Oral Pathology, 1986The customary mathematical expressions for magnification in rotational panoramic radiography are examined. It is shown that although these expressions yield correct results for small objects placed perpendicularly to the central ray of the beam, they must be corrected in other situations.
U. Welander +3 more
openaire +3 more sources
Panoramic Radiography for Use in Experimental Dogs
Dentomaxillofacial Radiology, 1979The use of panoramic radiography in experimental dogs is described. The advantages of this technique as compared to conventional radiography of the maxillo-mandibular apparatus in experimental small animals are exemplified with radiographs of dental implants in beagles. The technical prerequisites and limitations of the technique in dogs are discussed.
P A Reichart, W Küpper, R Worch
openaire +3 more sources
Panoramic radiography in orthodontic diagnosis
American Journal of Orthodontics, 1967Abstract Despite the great and continuing challenge of diagnosis and the need for constant evaluation of continuing orthodontic therapy, the emphasis until recently has been on the mechanisms of actual treatment and not on the all-important phase of diagnosis.
openaire +3 more sources
Influence of the rotation centre in panoramic radiography
Radiation Protection Dosimetry, 2007The aim is to present the curve of the rotation centre in dental panoramic radiography and to examine its influence on organ doses. A screenless film was fixed between the layers of an Alderson Rando phantom in the centre of the mandible. The phantom was positioned in two different X-ray units [Scanora (Soredex, Helsinki, Finland) and Orthophos (Sirona,
G. Kaeppler, S. Reinert, M. Buchgeister
openaire +3 more sources
Digital panoramic radiography: An overview [PDF]
Seminars in Orthodontics, 2004 New technologies are continually being developed and one of the most useful for clinical orthodontics is the development of the digital panoramic radiograph. This article describes this technology including what digital panoramic images are, how they are acquired, and some attributes and advantages of these newer methods. Advantages for the orthodontic
Nikos Parissis +4 more
openaire +1 more source
Rare earth screens for panoramic radiography
Oral Surgery, Oral Medicine, Oral Pathology, 1984Six panoramic radiographs, each made with a different screen/film combination, were compared for "periapical visibility" by fourteen dentists. Two combinations (a par-speed and a high-speed) used calcium tungstate screens, and three used rare earth screen systems four times faster than par-speed.
Larry J. Coggins, Charles Hurlburt
openaire +3 more sources
Dimensions of the Focal Trough in Panoramic Radiography
The Journal of the American Dental Association, 1972A method of radiographing target pins in a known repeatable position was devised so that the outline of the focal area in the panoramic radiograph unit could be delineated. A pin-holding device was so designed that target pins could be moved across the area of focus in three parallel planes.
Cecil E. Brown +2 more
openaire +3 more sources