نتایج جستجو برای: beam computed tomography cbct

تعداد نتایج: 367528  

2016
Lawrence Lechuga Georg A. Weidlich

A comparison of image quality and dose delivered between two differing computed tomography (CT) imaging modalities-fan beam and cone beam-was performed. A literature review of quantitative analyses for various image quality aspects such as uniformity, signal-to-noise ratio, artifact presence, spatial resolution, modulation transfer function (MTF), and low contrast resolution was generated. With...

2015
Hyo-Cheol Kim

With the advent of C-arm cone-beam computed tomography (CBCT), minimally-invasive procedures in the angiography suite made a new leap beyond the limitations of 2-dimensional (D) angiography alone. C-arm CBCT can help interventional radiologists in several ways with the treatment of hepatocellular carcinoma (HCC); visualization of small tumors and tumor-feeding arteries, identification of occult...

Journal: :Polish journal of radiology 2016
Smita Kamtane Monali Ghodke

BACKGROUND The aim of the study was to identify the number of root canals and examine root canal morphology of permanent mandibular incisors in an Indian sub-population of Pune, Maharashtra, India using cone-beam computed tomography (CBCT). MATERIAL/METHODS This study was conducted at Elite CBCT & Dental Diagnostics, Pune. One hundred mandibular incisors were evaluated for the number of root,...

Journal: :International Journal of Research in Medical Sciences 2022

Recognition of aberrant root canal configurations is critical to successfully negotiate and treat a one such aberrancies C shape system. The fins webs present in system presents challenge debridement obturation. Knowledge variations through advanced imaging modalities like CBCT, rotary hand instruments assisted with ultrasonics modified obturation techniques aid effective management shaped cana...

Journal: :The journal of contemporary dental practice 2013
Jiwanasha Manish Agrawal Manish Suresh Agrawal Lalita Girish Nanjannawar Anita D Parushetti

UNLABELLED Cone beam computed tomography (CBCT) has probably been one of the most revolutionary innovations in the field of dentistry in the past decade and it provides a novel platform for orthodontic diagnosis and treatment planning. Current imaging techniques are essentially two-dimensional (2D) representations of threedimensional (3D) objects and suffer from several limitations. Hence, fulf...

2006
Seungjong Oh Siyong Kim Tae‐Suk Suh

The advent of kilovoltage cone-beam computed tomography (CBCT) integrated with a linear accelerator allows for more accurate image-guided radiotherapy (IGRT). The IGRT technique corrects target displacement based on internal body information obtained by acquiring the CBCT image set and registering it with the simulation CT image set just before the beam is delivered. In the present paper, we co...

2013
Jun Li Weiguang Yao Ying Xiao Yan Yu

The study was to explore the feasibility of improving cone-beam CT (CBCT) number (corresponding to the Hounsfield units in computed tomography) consistency using a scatter-correction algorithm, with the aim of using CBCT images for treatment planning with density correction. A scatter correction algorithm was applied to a Varian OBI CBCT and an Elekta XVI CBCT, and was evaluated for improving C...

Jahangir Haghani, Majid Asadi-Shekaari, Maryam Alsadat Hashemipour, Molok Torabi, Parviz Amini, Simin Esmaeli,

Introduction: Cone beam computed tomography (CBCT) is a new method that is able to provide three-dimensional images in radiology and is useful for dentomaxillofacial imaging. This study aimed to investigate the cases administrated CBCT by dentists of Kerman (2015 year). Methods: This cross-sectional study was conducted on dentists in Kerman. The data were gathered using standard research q...

Journal: :iranian endodontic journal 0
rahul kumar

introduction: coronal anatomic variations in permanent maxillary molars are unusual; conversely variations involving the number of root canals or number of roots are more common. methods and materials: this case report presents a successful nonsurgical endodontic therapy of left maxillary first molar with three roots and seven root canals. this unusual morphology was diagnosed using a dental op...

2017
BS Mahesh Shilpa P Shastry Padmashree S Murthy TR Jyotsna

AIM To report a rare case of large radicular cyst-associated deciduous tooth and to discuss the importance of cone beam computed tomography (CBCT) in diagnosing the condition. BACKGROUND Radicular cyst is the most common cyst affecting the permanent teeth, but its occurrence in deciduous teeth is rare. Most of the radicular cysts are asymptomatic and are discovered accidentally when radiograp...

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