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 Starck, G
Right arrow Articles by Alpsten, M
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Starck, G
Right arrow Articles by Alpsten, M
British Journal of Radiology 75 (2002),140-150 © 2002 The British Institute of Radiology

Full paper

A method to obtain the same levels of CT image noise for patients of various sizes, to minimize radiation dose

G Starck, PhD 1,2 L Lönn, MD, PhD 3 Å Cederblad, MSc 1 E Forssell-Aronsson, PhD 2 L Sjöström, MD, PhD 4 and M Alpsten, PhD 1,2

1Division of Medical Physics and Medical Engineering and Departments of 2Radiation Physics, 3Radiology and 4Medicine, Göteborg University, Sahlgrenska University Hospital, Bruna Stråket 13, SE-413 45 Göteborg, Sweden

Correspondence: Göran Starck, Sahlgrenska University Hospital, MR Centre, Bruna Stråket 13, SE-413 45 Gothenburg, Sweden

The aim of this study was to develop a method of obtaining the same levels of CT image noise for patients of various sizes to minimize radiation dose. Two CT systems were evaluated regarding noise characteristics using phantoms and dosimetric measurements. Both CT systems performed well at dose levels used in normal clinical imaging, but only one was found to be suitable for low radiation dose applications. The CT system with the lowest noise level was used for further detailed studies. A simple strategy for manual selection of patient-specific scan parameters, considering patient size and required image quality, was implemented and verified on 11 volunteers. Images were obtained with at least the prescribed image quality at significantly reduced radiation dose levels compared with standard scan parameters. Depending on the diameter of the tomographic section, i.e. size of the subject, the dose levels could be reduced to 1–45% of the radiation dose with standard scan parameters (120 kV, 250 mAs, 10 mm). The results indicate a general potential for dose reduction in CT for slim patients. For tissue volume determination, large dose reductions can be achieved by adjusting the scan parameters for each individual. The concept of patient-specific scan parameters could be fully automated in the CT system design, but would require the scan to be specified in terms of image quality rather than X-ray tube load.




This article has been cited by other articles:


Home page
 DiabetesHome page
J. M. Kindblom, M. Lorentzon, A. Hellqvist, L. Lonn, J. Brandberg, S. Nilsson, E. Norjavaara, and C. Ohlsson
BMI Changes During Childhood and Adolescence as Predictors of Amount of Adult Subcutaneous and Visceral Adipose Tissue in Men: The GOOD Study
Diabetes, April 1, 2009; 58(4): 867 - 874.
[Abstract] [Full Text] [PDF]

Home page
 Br. J. Radiol.Home page
J KULLBERG, J BRANDBERG, J-E ANGELHED, H FRIMMEL, E BERGELIN, L STRID, H AHLSTROM, L JOHANSSON, and L LONN
Whole-body adipose tissue analysis: comparison of MRI, CT and dual energy X-ray absorptiometry
Br. J. Radiol., February 1, 2009; 82(974): 123 - 130.
[Abstract] [Full Text] [PDF]

Home page
 Br. J. Radiol.Home page
J BRANDBERG, L LONN, E BERGELIN, L SJOSTROM, E FORSSELL-ARONSSON, and G STARCK
Accurate tissue area measurements with considerably reduced radiation dose achieved by patient-specific CT scan parameters
Br. J. Radiol., October 1, 2008; 81(970): 801 - 808.
[Abstract] [Full Text] [PDF]

Home page
 J. Clin. Endocrinol. Metab.Home page
L. Vandenput, D. Mellstrom, M. Lorentzon, C. Swanson, M. K. Karlsson, J. Brandberg, L. Lonn, E. Orwoll, U. Smith, F. Labrie, et al.
Androgens and Glucuronidated Androgen Metabolites Are Associated with Metabolic Risk Factors in Men
J. Clin. Endocrinol. Metab., November 1, 2007; 92(11): 4130 - 4137.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Roentgenol.Home page
G. Hur, S. W. Hong, S. Y. Kim, Y. H. Kim, Y. J. Hwang, W. R. Lee, and S. J. Cha
Uniform Image Quality Achieved by Tube Current Modulation Using SD of Attenuation in Coronary CT Angiography
Am. J. Roentgenol., July 1, 2007; 189(1): 188 - 196.
[Abstract] [Full Text] [PDF]

Home page
 DiabetesHome page
J. M. Kindblom, M. Lorentzon, E. Norjavaara, L. Lonn, J. Brandberg, J.-E. Angelhed, A. Hellqvist, S. Nilsson, and C. Ohlsson
Pubertal Timing Is an Independent Predictor of Central Adiposity in Young Adult Males: The Gothenburg Osteoporosis and Obesity Determinants Study
Diabetes, November 1, 2006; 55(11): 3047 - 3052.
[Abstract] [Full Text] [PDF]

Home page
 Eur J EndocrinolHome page
C. Franco, J. D Veldhuis, A. Iranmanesh, J. Brandberg, L. Lonn, B. Andersson, B.-A. Bengtsson, J. Svensson, and G. Johannsson
Thigh intermuscular fat is inversely associated with spontaneous GH release in post-menopausal women with abdominal obesity.
Eur. J. Endocrinol., August 1, 2006; 155(2): 261 - 268.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Roentgenol.Home page
J. Campbell, M. K. Kalra, S. Rizzo, M. M. Maher, and J.-A. Shepard
Scanning Beyond Anatomic Limits of the Thorax in Chest CT: Findings, Radiation Dose, and Automatic Tube Current Modulation
Am. J. Roentgenol., December 1, 2005; 185(6): 1525 - 1530.
[Abstract] [Full Text] [PDF]

Home page
 RadiologyHome page
M. K. Kalra, S. Rizzo, M. M. Maher, E. F. Halpern, T. L. Toth, J.-A. O. Shepard, and S. L. Aquino
Chest CT Performed with Z-Axis Modulation: Scanning Protocol and Radiation Dose
Radiology, October 1, 2005; 237(1): 303 - 308.
[Abstract] [Full Text] [PDF]

Home page
 RadiologyHome page
J. Menke
Comparison of Different Body Size Parameters for Individual Dose Adaptation in Body CT of Adults
Radiology, August 1, 2005; 236(2): 565 - 571.
[Abstract] [Full Text] [PDF]

Home page
 Radiat Prot DosimetryHome page
K. Ledenius, M. Gustavsson, S. Johansson, F. Stalhammar, J. Soderberg, L. M. Wiklund, and A. Thilander Klang
A method of predicting the image noise in paediatric multi-slice computed tomography images
Radiat Prot Dosimetry, May 17, 2005; 114(1-3): 313 - 316.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Roentgenol.Home page
T. Irie and H. Inoue
Individual Modulation of the Tube Current-Seconds to Achieve Similar Levels of Image Noise in Contrast-Enhanced Abdominal CT
Am. J. Roentgenol., May 1, 2005; 184(5): 1514 - 1518.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Roentgenol.Home page
S. S. Y. Ho, W. W-m. Lam, S. C. P. Ng, M. K. Lam, M. T. V. Chan, W. S. Poon, and C. Metreweli
Cerebral Vasoreactivity: A Comparison of Color Velocity Imaging Quantification and Stable Xenon-Enhanced CT
Am. J. Roentgenol., March 1, 2005; 184(3): 948 - 952.
[Abstract] [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
C J Koller, J P Eatough, and A Bettridge
Variations in radiation dose between the same model of multislice CT scanner at different hospitals
Br. J. Radiol., November 1, 2003; 76(911): 798 - 802.
[Abstract] [Full Text] [PDF]

Home page
 RadiologyHome page
M. K. Kalra, C. Wittram, M. M. Maher, A. Sharma, G. B. Avinash, K. Karau, T. L. Toth, E. Halpern, S. Saini, and J.-A. Shepard
Can Noise Reduction Filters Improve Low-Radiation-Dose Chest CT Images? Pilot Study
Radiology, July 1, 2003; 228(1): 257 - 264.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING  ALL BIR JOURNALS 
Copyright © 2002 by the British Institute of Radiology.