نتایج جستجو برای: cone beam
تعداد نتایج: 145331 فیلتر نتایج به سال:
Purpose: The objective of this study was to investigate the prevalence of pituitary calcifications using cone beam computed tomography in a group of Turkish individuals. Material and methods: Cone beam computed tomography scans in the axial, coronal and sagittal planes of the pituitary gland of 284 patients were examined for evidence of pituitary calcification. Results: In the cone beam compute...
Recent advancements in Cone Beam Computed Tomography (CBCT) have identified the importance of providing outcomes related to the appropriate use of this innovative technology in dentistry. To assist in determining whether evidence exists, the authors conducted a PubMed search in September, 2012 using the key words “cone beam in Dentistry.” This search revealed 1038 articles with 65 reviews recen...
Here we propose a cone-beam composite-circling mode to solve the quasi-short object problem, which is to reconstruct a short portion of a long object from longitudinally truncated cone-beam data involving the short object. In contrast to the saddle curve cone-beam scanning, the proposed scanning mode requires that the X-ray focal spot undergoes a circular motion in a plane facing the short obje...
A retromolar canal is an anatomical variation in the mandible. As it includes the neurovascular bundle, local anesthetic insufficiency can occur, and an injury of the retromolar canal during dental surgery in the mandible may result in excessive bleeding, paresthesia, and traumatic neuroma. Using imaging analysis software, we evaluated the cone-beam computed tomography (CT) images of two Korean...
4. Radiation protection: cone beam CT for dental and maxillofacial radiology. Evidence based guidelines. 2011. Available at: http:// www.sedentexct.eu/files/guidelines_final.pdf. Accessed December 23, 2015. 5. Halazonetis DJ. Cone-beam computed tomography is not the imaging technique of choice for comprehensive orthodontic assessment [Point/Counterpoint] Am J Orthod Dentofacial Orthop 2012; 141...
It has been a challenge to establish the accurate diagnosis of developmental tooth anomalies based on periapical radiographs. Recently, three-dimensional imaging by cone beam computed tomography has provided useful information to investigate the complex anatomy of and establish the proper management for tooth anomalies. The most severe variant of dens invaginatus, known as dilated odontome, is ...
Recently, several exact cone-beam reconstruction algorithms, such as the generalized filtered-backprojection (FBP) and backprojection-filtration (BPF) methods, have been developed to solve the long object problem. Although the well-known 3D Shepp-Logan phantom (SLP) is often used to validate these algorithms, it is deficient due to the discontinuity of the SLP. In this paper, we first construct...
OBJECTIVES The diagnosis of root fractures by conventional radiographs is still difficult because of limitations of 2D images. Cone-beam volumetric tomography improves the diagnosis capacity in dentistry, such as increased radiation dose to the patient and presence of artifacts on the image. STUDY DESIGN This study compared the images obtained on conventional periapical radiographs and 3D sca...
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