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. 2016 Dec 13;6(4):58. doi: 10.3390/brainsci6040058

Figure 5.

Figure 5

Calculating the subthalamic nucleus (STN) coordinates from the magnetic resonance imaging (MRI) console. (A) Two diagonal lines intersecting at the center of the frame at the STN level with MRI coordinates of the center of the frame shown inside the red square; (B) a crosshair at the center of the left STN, with its MRI coordinates shown inside the red square; two lines are drawn between the middle and lower fiducials on both sides of the frame and their lengths (in the blue rectangle) are used to calculate the Z coordinate; (C) a crosshair at the center of the right STN, with its MRI coordinates shown inside the red square; two line are drawn between the middle and lower fiducials on both sides of the frame and their lengths (in the blue rectangle) are used to calculate the Z coordinate.