Retraction to: BMC Medical Imaging (2019) 19:47

https://doi.org/10.1186/s12880-019-0344-2

The Editor has retracted this article [1] because Figure 1 appears to have multiple duplications and replications throughout. This article is therefore unreliable. Quan Zou does not agree with this statement. Sumei Ma and Xinghu Zhou have not responded to any correspondence from the Editor about this retraction.