Comparison of patient doses at different CT scanners with same acquisition protocol

L. Balkay, A. Oszlánszki, A. K. Krizsán

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In the last decade both the number of powerful CT scanners and the number of patient investigations increased with a consequent increase of the patient radiation dose. There are large dose variations (more than 10 fold) among individual CT centers and it remains true if they include the same model of CT scanners. The aim of this study was to compare the patient effective dose (De) during the CT examinations from different manufacturer models presuming the same acquisition protocol and using the imPACT patient organ and effective dose calculator program. The following manufacturers and models were selected in the program: GE (LightSpeed Ultra, LightSpeed 16, LightSpeed Pro 16, LightSpeed VCT), Philips (Brilliance 16, Brilliance 16 Power, Big Bore, Brilliance 64/40) and the Siemens (Emotion 6, Sensation 16, Sensation 16 Straton, Sensation 64, Definition AS). Head and body scans were defined for all cases altering tube voltages, while dose calculations were normalized to 100 mAs X-ray exposure. It was found that in body investigations the calculated D e for the GE scans were higher by 20% comparing to Siemens and Philips related values. For the head examinations the differences were larger by almost 55%. We also demonstrated that a power relationship can be found between the De and the tube voltage with the exponent of 3.02±0.14 kV-1 and 2.68±0.14 kV-1 for the body and the head scans respectively. It can be concluded that the patient effective dose could be different in CT examinations using distinct CT scanners but defining the same acquisition protocol. Considering the patient dose, this also means that the scan protocols cannot be transferred between different models without specific investigation.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Pages3644-3645
Number of pages2
DOIs
Publication statusPublished - 2012
Event2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012 - Anaheim, CA, United States
Duration: Oct 29 2012Nov 3 2012

Other

Other2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012
CountryUnited States
CityAnaheim, CA
Period10/29/1211/3/12

Fingerprint

scanners
acquisition
dosage
Head
examination
emotions
tubes
calculators
Emotions
electric potential
X-Rays
organs
Radiation
exponents
cavities
radiation
x rays
Power (Psychology)

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

Cite this

Balkay, L., Oszlánszki, A., & Krizsán, A. K. (2012). Comparison of patient doses at different CT scanners with same acquisition protocol. In IEEE Nuclear Science Symposium Conference Record (pp. 3644-3645). [6551837] https://doi.org/10.1109/NSSMIC.2012.6551837

Comparison of patient doses at different CT scanners with same acquisition protocol. / Balkay, L.; Oszlánszki, A.; Krizsán, A. K.

IEEE Nuclear Science Symposium Conference Record. 2012. p. 3644-3645 6551837.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Balkay, L, Oszlánszki, A & Krizsán, AK 2012, Comparison of patient doses at different CT scanners with same acquisition protocol. in IEEE Nuclear Science Symposium Conference Record., 6551837, pp. 3644-3645, 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012, Anaheim, CA, United States, 10/29/12. https://doi.org/10.1109/NSSMIC.2012.6551837
Balkay L, Oszlánszki A, Krizsán AK. Comparison of patient doses at different CT scanners with same acquisition protocol. In IEEE Nuclear Science Symposium Conference Record. 2012. p. 3644-3645. 6551837 https://doi.org/10.1109/NSSMIC.2012.6551837
Balkay, L. ; Oszlánszki, A. ; Krizsán, A. K. / Comparison of patient doses at different CT scanners with same acquisition protocol. IEEE Nuclear Science Symposium Conference Record. 2012. pp. 3644-3645
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