Optimisation of chest computed tomography using a phantom: impact of mAs and reconstruction techniques on image quality

Reis, Cláudia; Faquir, T.; Harsaker, V.; Hogg, Peter; Kristoffersen, L.; van Rein, I. L.; Stancombe, K.; Warmerdam, N. C.; Wergeland, C.

http://hdl.handle.net/10400.21/7591

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Abstract(s)

Purpose: To verify if the mAs and reconstruction techniques affect the visualization of relevant structures in lung Computed Tomography (CT) using a phantom. Methods and Materials: Images were acquired using varying mAs and reconstruction techniques. Image quality (IQ) was analyzed applying two approaches: perceptual, using 5 observers and objective (edge gradient calculation) to verify the sharpness of the structures. Dose was recorded. Wilcoxon Signed Rank test was used to compare the data from the perceptual image analysis. P-values were calculated (Bonferroni-Correction method) to compare reconstruction techniques and mAs. A Kappa Test with linear weighting was performed to calculate the level of agreement between observers.

Keywords

Imagiology Chest Computed tomography Phantom Image quality

URI

http://hdl.handle.net/10400.21/7591

Citation

Reis CS, Faquir T, Harsaker V, Hogg P, Kristoffersen L, van Rein IL, et al. Optimisation of chest computed tomography using a phantom: impact of mAs and reconstruction techniques on image quality. In: ECR 2016 – European Congress of Radiology, Vienna (Austria), 2-6 March 2016. Insights Imaging. 2016;7(Suppl 1):S236.