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. 2021 Jun 8;7(2):238–252. doi: 10.3390/tomography7020022

Figure 1.

Figure 1

Sample set of MRI ROIs. (A–D) are examples of MR images of the phantom with differently sized ROIs (in yellow). (A,B) are images acquired with the T1w sequence, (C,D) are images acquired with the T2w TIRM sequence. The left column shows ROIs with a 16 mm diameter, the right column ROIs with a 16-pixel diameter. Due to the different spatial resolutions, the 16-pixel ROI in the T2w TIRM image has a greater diameter than the 16-pixel ROI in the T1w image. Both T1w and T2w TIRM-weighted images show typical, gradient-like inhomogeneities within the phantom (brighter at the bottom, darker at the top).