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PROPELLER images of a free-breathing mouse follow the evolution of metastatic colon cancer in the liver at (a) day 21; (b) day 24; (c) day 28; (d) day 31 post-inoculation. Lesions measuring < 200 μm seen in day 21 can be seen in the 1 mm slices out to the point where the necrotic core begins to form (arrows). Courtesy Dr. Prachi Pandit, PhD.
