Image Quality and Dose Assessment in Inner Ear Computed Tomography Imaging With a Flat Panel–Based System. Issue 2 (March 2015)

• Record Type: Journal Article
• Authors: Brancaccio, Rosa; Bettuzzi, Matteo; Morigi, Maria Pia; Casali, Franco; Ragazzini, Luca
• Is Part Of: Journal of computer assisted tomography. Volume 39:Issue 2(2015)
• Publication Date: 2015-03
• Subjects: Tomography -- Periodicals; Tomography -- Periodicals; Tomography; Periodicals; 616.0757
• DOI: 10.1097/RCT.0000000000000176
• Languages: English
• ISSNs: 0363-8715

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <sec> <title>Purpose</title> <p>The temporal bone includes several important structures of the human body, some of which are smaller than 1 mm. The aim of this study is to demonstrate the feasibility of a computed tomography system capable of providing 3-dimensional images of the inner ear with low doses and a spatial resolution adequate for providing the surgeon with good guidance.</p> </sec> <sec> <title>Methods</title> <p>A laboratory prototype, based on a CMOS Hamamatsu model C10900D detector, was set up, and several tomographic tests were carried out on 2 dedicated phantoms.</p> </sec> <sec> <title>Results</title> <p>The proposed system is able to achieve a 150-μm spatial resolution (5% of modulation transfer function) with a voxel size of 88 μm, with an acceptable contrast and an estimated effective dose ranging from 1/20 up to 1/100 of the mean effective dose reported in literature for head computed tomography.</p> </sec> <sec> <title>Conclusion</title> <p>The new tomographic system has shown excellent characteristics and proves suitable for the imaging of the inner ear. In particular, this prototype requires very low radiation doses.</p> </sec> </abstract>