| Tour 1: Next/Previous/Start: Another method of imaging which reflects breakdown of the blood-brain barrier is shown here. This is an image of cerebral uptake of Thallium-201, a potassium analog which "leaks" into the brain at sites of active tumor growth.
Note the 2 large foci of red-colored activity in the sites of 201-Tl uptake.
Compare this with the previous tour stop to see the correspondence of Thallium-201 images with gadolinium MR. These images are "in register", and are therefore samples of the same slice of brain. On the next stop, we will look at a higher slice of the same stack, to see the more superior extent of the active portion of the lesion.
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