PT - JOURNAL ARTICLE AU - T.P. Tanpitukpongse AU - J.R. Petrella TI - Reply: AID - 10.3174/ajnr.A5259 DP - 2017 May 25 TA - American Journal of Neuroradiology 4099 - http://www.ajnr.org/content/early/2017/05/25/ajnr.A5259.short 4100 - http://www.ajnr.org/content/early/2017/05/25/ajnr.A5259.full