Gas bubble motion artifact in MDCT

AJR. American Journal of Roentgenology
Franklin LiuPaul E Kinahan

Abstract

The purpose of our study was to characterize the imaging features of an MDCT artifact caused by gas bubble motion. For the period 2002-2006, the CT images of 10 patients that revealed a curvilinear artifact thought to be due to a gas bubble moving during CT acquisition were retrospectively identified and reviewed by an attending body radiologist. The clinical images were acquired on MDCT scanners. A phantom containing water and moving air bubbles (gas injection rates of 0.1 and 0.5 mL/s) was designed, built, and scanned using a 16-MDCT scanner. Computer simulation was used to test our hypothesis that these observed artifacts originated from moving gas bubbles. Semicircular tubular CT artifacts with attenuation close to that of air were observed in all 10 clinical cases. The acquired MDCT images from the phantom and the computer simulations showed tubular air-attenuation semicircular artifacts that closely matched the imaging findings on the 10 clinical cases. Increased rates of bubble injection multiplied the artifact. Based on the computer simulation, the precise appearance of the artifact depends on the bubble location and velocity relative to the rotation of the CT scanner. Gas bubble motion during CT generates a semicircula...Continue Reading

References

Dec 1, 1988·AJR. American Journal of Roentgenology·R D TarverJ D Godwin
Oct 26, 1999·IEEE Transactions on Medical Imaging·X LiuD Townsend
Dec 12, 2000·Radiographics : a Review Publication of the Radiological Society of North America, Inc·C H McColloughF E Zink
Nov 13, 2004·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Julia F Barrett, Nicholas Keat
Jun 7, 2005·Advances in Colloid and Interface Science·K MalysaM Krzan
Sep 24, 2005·AJR. American Journal of Roentgenology·Marcus KatohArno Buecker

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Citations

Nov 21, 2008·AJR. American Journal of Roentgenology·Donald J Emby, Kevin C Ho
Feb 6, 2015·Medical Physics·Rolf Clackdoyle, Laurent Desbat
Sep 15, 2012·Asian Spine Journal·Yoshihisa SugimotoTetsuro Mazaki

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