Results 101 to 110 of about 309,469 (351)
Effects of bone- and air-tissue inhomogeneities on the dose distributions of the Leksell Gamma Knife$^{\circledR}$ calculated with PENELOPE [PDF]
, 2005 Monte Carlo simulation with PENELOPE (v.~2003) is applied to calculate Leksell Gamma Knife$^{\circledR}$ dose distributions for heterogeneous phantoms. The usual spherical water phantom is modified with a spherical bone shell simulating the skull and an air-filled cube simulating the frontal or maxillary sinuses. Different simulations of the 201 source
arxiv +1 more source
A STUDY ON CHRONIC OTITIS MEDIA ACTIVE MUCOSAL TYPE WITH SINUSITIS AS FOCAL SEPSIS [PDF]
, 2012 AIM : To establish the role of Sinusitis as Focal sepsis in Chronic Otitis media active mucosal disease, to emphasizethe need of proper diagnostic endoscopic evaluation and improvement in middle ear mucosal disease status afterfunctional endoscopic sinus
Gopalakrishnan, Shankaranarayanan +1 more
core +1 more source
Sinonasal Intestinal‐Type Adenocarcinoma in the Netherlands: A Nationwide Study (2008–2022)
Head &Neck, EarlyView.ABSTRACT Background Intestinal‐type adenocarcinoma (ITAC) is a rare sinonasal malignancy with poor survival. By creating a clinical and epidemiological overview of the Dutch ITAC population between 2008 and 2022, this study aims to identify areas for improvement in ITAC management. Methods A systematic query within the Netherlands Cancer Registry (NCR)
Lise J. van de Velde +8 more
wiley +1 more source
, 2018 Mucosal nasopharyngeal melanoma is a rare head and neck melanoma. Prognosis is poor (5-year overall survival rate of 10–30%) with high rates of metastases and local recurrence. Head and neck mucosal melanoma represents 0.8–3.7% of all melanomas and 0.03%
Calvieri, Stefano +4 more
core +1 more source
Paediatric computed tomography diagnostic reference levels in Africa: A systematic review
Journal of Medical Radiation Sciences, Volume 72, Issue 1, Page 139-147, March 2025.Improvements in computed tomography (CT) technology have increased its applications in medical imaging. Variations in the paediatric DRLs indicate that harmonisation and standardisation of paediatric CT protocols are essential for the optimisation of paediatric doses. Abstract Introduction Improvements in computed tomography (CT) technology in terms of
Emmanuel Gyan +3 more
wiley +1 more source
An 8-year evaluation of nasal and paranasal sinuses malignant neoplasms in Tehran University of Medical Sciences hospitals [PDF]
Iranian Journal of Otorhinolaryngology, 2009 Introduction: Nasal and paranasal sinuses malignant neoplasms are usually diagnosed in advanced stages because of non-specific and benign symptoms. In this study we evaluated the symptoms, pathology and treatment of paranasal sinuses malignancies in ...
Mohsen Naraghi +3 more
doaj
Indian Journal of Social Psychiatry, 2017 Background: Fungal infections of nose and paranasal sinuses have a protracted course with frequent relapses and recurrences. Quality of life (QOL) of such patients is severely affected.
Tanuja Kaushal +5 more
doaj +1 more source
Performance of Iterative Image Reconstruction in CT of the Paranasal Sinuses: A Phantom Study
American Journal of Neuroradiology, 2013 BACKGROUND AND PURPOSE: CT in low dose technique is the criterion standard imaging modality for evaluation of the paranasal sinus. Our aim was to evaluate the dose-reduction potential of a recently available sinogram-affirmed iterative reconstruction ...
B. Schulz +7 more
semanticscholar +1 more source
Histological Type‐Specific Behavior in Sarcomas: Analysis of Head and Neck Cancer Registry of Japan
The Laryngoscope, EarlyView.The nasal cavity and paranasal sinuses are the most common sites for sarcomas of the head and neck, and predominant histological type depended on the primary site. Objective The goal of this study was to better understand the epidemiology, clinical characteristics, and treatment outcomes of head and neck sarcomas using real‐world data from Japan ...
Kenya Kobayashi +7 more
wiley +1 more source
Automatic 2D-3D Registration without Contrast Agent during Neurovascular Interventions [PDF]
arXiv, 2021 Fusing live fluoroscopy images with a 3D rotational reconstruction of the vasculature allows to navigate endovascular devices in minimally invasive neuro-vascular treatment, while reducing the usage of harmful iodine contrast medium. The alignment of the fluoroscopy images and the 3D reconstruction is initialized using the sensor information of the X ...
arxiv