نتایج جستجو برای: unfiltered panoramic
تعداد نتایج: 6133 فیلتر نتایج به سال:
one of the most common positioning errors in panoramic radiography is palatoglossal air space above the apices of the root of maxillary teeth. it causes a radiolucency obscuring the apices of maxillary teeth. in the case of this positioning error, the imaging should be repeated. this causes the patient be exposed to radiation again. to avoid the repetition of exposing harmful x-rays to the pati...
To reconstruct an environment under 360 degrees with a great accuracy and true color represents an important challenge for motion pictures and multimedia applications. This paper describes a new stereoscopic panoramic sensor to achieve this task. Unlike the existing sensors, it uses four acquisition channels coupled with an additional structured light projector to obtain an accurate 3 0 panoram...
Introduction: Dental caries is the most common chronic condition in children. Recently, there has been a growing tendency to using digital panoramic radiography among clinicians. The present study aimed to determine the accuracy of digital panoramic radiography with and without software enhancement in the diagnosis of proximal dental caries in primary molars. Methods: This study was conducted u...
Statement of Problem: Panoramic radiography seems necessary at examination, diagnosis and treatment plan phases of removable prostheses treatment since most of the patients who request removable prostheses treatment have retained root fragments, impacted teeth, cycts and tumors that might not otherwise be detected.Purpose: The aim of the present study was to investigate the incidence rate of re...
PURPOSE This study evaluated the association between cone beam computed tomography (CBCT) and panoramic radiographs in the assessment of a superimposed relationship between the mandibular canal and impacted third molars. MATERIALS AND METHODS The study samples consisted of 175 impacted third molars from 131 patients who showed a superimposed relationship between the mandibular canal and third...
BACKGROUND The gonial angle is one of the most important measurements required for orthodontic treatment and orthognathic surgery. It is difficult to determine the accurate measurement of each gonial angle on cephalometric radiographs because of superimposition of the left and right angles. OBJECTIVES The aim of the present study was to determine the right and left gonial angles on panoramic ...
abstract background and aim: considering the widespread development of implants in dental treatment plans, linear measurements on panoramic radiography are of especial importance. in the present study we investigated the effect of head misalignment up to 15° around vertical and horizontal axes on the magnification rate of digital panoramic radiography in each part of upper and lower jaws. mater...
Several techniques have been used for terrestrial panoramic imaging. Known methods for panoramic imaging include: mosaicking/stitching of a rotated frame array CCD camera, mirror technology including single mirror and multi mirrors, near 180 degrees with large frame cameras or one shot with fish-eye lens and recently a linear array-based panoramic camera by horizontal rotation. Up to now, the t...
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