Determination of the optimal dose reduction level via iterative reconstruction using 640-slice volume chest CT in a pig model

PloS One
Xingli LiuQiyong Guo

Abstract

To determine the optimal dose reduction level of iterative reconstruction technique for paediatric chest CT in pig models. 27 infant pigs underwent 640-slice volume chest CT with 80kVp and different mAs. Automatic exposure control technique was used, and the index of noise was set to SD10 (Group A, routine dose), SD12.5, SD15, SD17.5, SD20 (Groups from B to E) to reduce dose respectively. Group A was reconstructed with filtered back projection (FBP), and Groups from B to E were reconstructed using iterative reconstruction (IR). Objective and subjective image quality (IQ) among groups were compared to determine an optimal radiation reduction level. The noise and signal-to-noise ratio (SNR) in Group D had no significant statistical difference from that in Group A (P = 1.0). The scores of subjective IQ in Group A were not significantly different from those in Group D (P>0.05). There were no obvious statistical differences in the objective and subjective index values among the subgroups (small, medium and large subgroups) of Group D. The effective dose (ED) of Group D was 58.9% lower than that of Group A (0.20±0.05mSv vs 0.48±0.10mSv, p <0.001). In infant pig chest CT, using iterative reconstruction can provide diagnostic image qua...Continue Reading

References

Jul 24, 2003·AJR. American Journal of Roentgenology·Denis TackPierre Alain Gevenois
Sep 27, 2005·Radiology·Mannudeep K KalraSuzanne L Aquino
Aug 29, 2007·Radiation Research·D L PrestonK Kodama
Nov 30, 2007·The New England Journal of Medicine·David J Brenner, Eric J Hall
Sep 17, 2008·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Chang Hyun LeeJung-Gi Im
Dec 17, 2009·Archives of Internal Medicine·Amy Berrington de GonzálezCharles Land
Jun 11, 2010·Pediatric Radiology·Rutger A J NievelsteinAart J van der Molen
Oct 24, 2012·Annals of the ICRP·P-L KhongH Ringertz

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Software Mentioned

3D
3D Exposure 3D
SPSS
AIDR
SURE

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