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. 2003 Apr 1;88(7):1135–1142. doi: 10.1038/sj.bjc.6600814

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Copyright © 2003 Cancer Research UK

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A series of T₁-weighted MR images acquired from a regressive E.G7-OVA tumour (A) and an EL-4 tumour (B) following i.v. injection of the MRI contrast agent, Gd-DTPA. The first images in the series were acquired prior to contrast agent injection. The subsequent images (reading from left-to-right and top-to-bottom) were acquired at 2 min intervals. The presence of the contrast agent increases signal intensity in the images and these increases are proportional to its concentration.