BJR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS

This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Sohaib, S A
Right arrow Articles by Reznek, R H
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Sohaib, S A
Right arrow Articles by Reznek, R H
British Journal of Radiology 74 (2001),157-161 © 2001 The British Institute of Radiology

Full paper

The effect of decreasing mAs on image quality and patient dose in sinus CT

S A Sohaib, MRCP, FRCR ,1 P D Peppercorn, MRCP, FRCR 1 J A Horrocks, BSc, PhD 2 M H Keene, FRCS 3 G S Kenyon, FRCS 3 and R H Reznek, FRCP, FRCR 1

1 Departments of Diagnostic Imaging 2 Clinical Physics 3 Otolaryngology, St Bartholomew's Hospital, West Smithfield, London EC1A 7BE, UK

The aim of this study was to determine the effect of reducing mAs on the diagnostic quality of images and the radiation dose to the orbits in patients undergoing sinus CT. We studied 40 consecutive patients undergoing paranasal sinus CT for inflammatory disease prior to functional endoscopic sinus surgery (FESS). Four groups of 10 patients were scanned at 200 mAs, 150 mAs, 100 mAs and 50 mAs, respectively. Orbital radiation dose was measured using thermoluminescent dosemeters. Images were reviewed independently by two observers who were unaware of the mAs setting used. Image quality was evaluated using a semi-quantitative scoring system for six anatomical structures. The osteomeatal complex, uncinate process, infundibulum, frontal recess, middle turbinate and optic nerve were assessed as: clearly demonstrated (2 points); demonstrated but not clearly visualized (1 point); or not seen (0 points). No significant difference was shown between any of the four groups in terms of image quality according to the scoring system used in this study. Mean radiation dose to the orbit was reduced by 77%, from 13.5 mGy at 200 mAs to 3.1 mGy at 50 mAs (p<0.05). CT of the sinuses can be performed in patients prior to FESS at greatly reduced mAs without loss of diagnostic quality of the images. This is important in reducing the radiation dose to the lens.




This article has been cited by other articles:


Home page
Am. J. Neuroradiol.Home page
E.J. Lee, S.K. Lee, R. Agid, P. Howard, J.M. Bae, and K. terBrugge
Comparison of Image Quality and Radiation Dose between Fixed Tube Current and Combined Automatic Tube Current Modulation in Craniocervical CT Angiography
AJNR Am. J. Neuroradiol., October 1, 2009; 30(9): 1754 - 1759.
[Abstract] [Full Text] [PDF]


Home page
Am. J. Neuroradiol.Home page
C.B. Nauer, A. Eichenberger, P. Dubach, J. Gralla, and M. Caversaccio
CT Radiation Dose for Computer-Assisted Endoscopic Sinus Surgery: Dose Survey and Determination of Dose-Reduction Limits
AJNR Am. J. Neuroradiol., March 1, 2009; 30(3): 617 - 622.
[Abstract] [Full Text] [PDF]


Home page
Dentomaxillofac RadiolHome page
R Olszewski, H Reychler, G Cosnard, J M Denis, S Vynckier, and F Zech
Accuracy of three-dimensional (3D) craniofacial cephalometric landmarks on a low-dose 3D computed tomograph
Dentomaxillofac. Radiol., July 1, 2008; 37(5): 261 - 267.
[Abstract] [Full Text] [PDF]


Home page
RadiologyHome page
M. H. Brem, A. A. Zamani, R. Riva, K. H. Zou, Z. Rumboldt, F. F. Hennig, R. Kikinis, A. M. Norbash, and U. J. Schoepf
Multidetector CT of the Paranasal Sinus: Potential for Radiation Dose Reduction
Radiology, June 1, 2007; 243(3): 847 - 852.
[Abstract] [Full Text] [PDF]


Home page
Am. J. Roentgenol.Home page
D. V. Sahani, S. P. Kalva, P. F. Hahn, and S. Saini
16-MDCT Angiography in Living Kidney Donors at Various Tube Potentials: Impact on Image Quality and Radiation Dose
Am. J. Roentgenol., January 1, 2007; 188(1): 115 - 120.
[Abstract] [Full Text] [PDF]


Home page
Am. J. Roentgenol.Home page
T. H. Mulkens, C. Broers, S. Fieuws, J.-L. Termote, and P. Bellnick
Comparison of Effective Doses for Low-Dose MDCT and Radiographic Examination of Sinuses in Children
Am. J. Roentgenol., May 1, 2005; 184(5): 1611 - 1618.
[Abstract] [Full Text] [PDF]


Home page
RadiologyHome page
B. B. Ertl-Wagner, R.-T. Hoffmann, R. Bruning, K. Herrmann, B. Snyder, J. D. Blume, and M. F. Reiser
Multi-Detector Row CT Angiography of the Brain at Various Kilovoltage Settings
Radiology, May 1, 2004; 231(2): 528 - 535.
[Abstract] [Full Text] [PDF]


Home page
Am. J. Neuroradiol.Home page
A. J. Fox
Use of the Lowest Necessary Radiation Dose
AJNR Am. J. Neuroradiol., April 1, 2004; 25(4): 519 - 519.
[Full Text] [PDF]


Home page
RadiologyHome page
M. K. Kalra, M. M. Maher, T. L. Toth, L. M. Hamberg, M. A. Blake, J.-A. Shepard, and S. Saini
Strategies for CT Radiation Dose Optimization
Radiology, March 1, 2004; 230(3): 619 - 628.
[Abstract] [Full Text] [PDF]


Home page
Br. J. Radiol.Home page
I Zammit-Maempel, C L Chadwick, and S P Willis
Radiation dose to the lens of eye and thyroid gland in paranasal sinus multislice CT
Br. J. Radiol., June 1, 2003; 76(906): 418 - 420.
[Abstract] [Full Text] [PDF]


Home page
Am. J. Roentgenol.Home page
M. K. Kalra, S. Prasad, S. Saini, M. A. Blake, J. Varghese, E. F. Halpern, J. T. Rhea, and J. H. Thrall
Clinical Comparison of Standard-Dose and 50% Reduced--Dose Abdominal CT: Effect on Image Quality
Am. J. Roentgenol., November 1, 2002; 179(5): 1101 - 1106.
[Abstract] [Full Text] [PDF]


Home page
Am. J. Roentgenol.Home page
S. R. Prasad, C. Wittram, J.-A. Shepard, T. McLoud, and J. Rhea
Standard-Dose and 50%--Reduced-Dose Chest CT: Comparing the Effect on Image Quality
Am. J. Roentgenol., August 1, 2002; 179(2): 461 - 465.
[Abstract] [Full Text] [PDF]




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING  ALL BIR JOURNALS 
Copyright © 2001 by the British Institute of Radiology.