Low-dose computed tomography of the paranasal sinus and facial skull using a high-pitch dual-source system—First clinical results
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Boris Schell, Ralf W. Bauer, Thomas Lehnert, J. Matthias Kerl, Markus Hambek, Angelika May, Thomas J. Vogl, Martin G. Mack
- چاپ و سال / کشور: 2010
Description
Objective Computed tomography (CT) of the paranasal sinus is the standard diagnostic tool for a wide range of indications in mostly younger patients. This study aims to assess the image quality of CT of the sinus by using a highpitch dual-source technique with special regard to the radiation dose. Methods Examinations were performed on a second-generation dualsource CT with a pitch factor of 3.0 (dual-source mode). Images were compared with those with a pitch factor of 0.9 on the same system (single-source mode) and with those of 16-slice CT. Image quality was evaluated by four blinded readers using a 5-point scale (1=poor, 5=excellent). Comparison of the dose length product (DLP) was used to estimate radiation exposure. Results Seventy-three consecutive patients underwent imaging with the proposed CT protocols. The viewers rated the image quality of the dual-source image sets as nearly as good (3.62) as the single-source images on the same device (4.18) and those on 16-slice CT (3.7). DLP was cut to half of the dose [51mGycm vs. 97.8mGycm vs. 116.9mGycm (p<0.01)]. Conclusions Using the proposed dual-source mode when examining the paranasal sinus, diagnostic image quality can be achieved while drastically lowering the patient's radiation exposure
Eur Radiol (2011) 21: 107–112 DOI 10.1007/s00330-010-1892-6 Received: 3 May 2010 Revised: 10 June 2010 Accepted: 23 June 2010 Published online: 20 July 2010
