Authors: Stephan Baumueller Anna Winklehner Christoph Karlo Robert Goetti Thomas Flohr Erich W Russi Thomas Frauenfelder Hatem Alkadhi
Publish Date: 2012/06/15
Volume: 22, Issue: 12, Pages: 2597-2606
Abstract
Nonenhanced lowdose chest CT tube currenttime product 30 mAs was performed on 30 patients at 100 kVp and on 30 patients at 80 kVp Images were reconstructed with FBP and SAFIRE Two blinded independent readers measured image noise two readers assessed image quality of normal anatomic lung structures on a fivepoint scale Radiation dose parameters were recordedImage noise in datasets reconstructed with FBP 574 ± 159 was significantly higher than with SAFIRE 317 ± 98 P 0001 Image quality was significantly superior with SAFIRE than with FBP P 001 without significant difference between FBP at 100 kVp and SAFIRE at 80 kVp P = 068 Diagnostic image quality was present with FBP in 96 of images at 100 kVp and 88 at 80 kVp and with SAFIRE in 100 at 100 kVp and 98 at 80 kVp There were significantly more datasets with diagnostic image quality with SAFIRE than with FBP P 001 Mean CTDIvol and effective doses were 15 ± 07 mGy·cm and 07 ± 02 mSv at 100 kVp and 14 ± 28 mGy·cm and 05 ± 02 mSv at 80 kVp P 0001 both
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