Skip to main content
. Author manuscript; available in PMC: 2015 Jan 5.
Published in final edited form as: AJR Am J Roentgenol. 2014 Aug;203(2):W158–W165. doi: 10.2214/AJR.14.12518

Fig. 2.

Fig. 2

Choline (Cho)/N-acetyl aspartate (NAA) ratio map of MR spectrographic image reveals residual tumor (arrow) better than MRI alone in glioblastoma patients after surgical resection.

A, To estimate residual glioblastomas, T1-weighted image (top left) was subtracted from contrast-enhanced T1-weighted image (top right). Difference map (bottom) shows residual tumors marked in purple inside of red circle using Velocity AI program (Velocity Medical Solution).

B, Cho-to-NAA ratio map was calculated using Metabolic Imaging Data Analysis System (University of Miami) and displayed using Velocity AI. Residual tumors based on elevated Cho-to-NAA ratio are indicated by red arrow inside of red circle. Some motion artifacts are shown in lesions of ventricle and sinus in top and center area.