Figure 5.

Anatomical, diffusion-weighted and dynamic contrast-enhanced MRI of intracranial MDA-MB-231 LM2–4 tumors treated with B20-4.1.1.

(A) T₂-weighted MRI images, and associated parametric ADC and K^trans maps, from representative intracranial MDA-MB-231 LM2–4 tumors prior to and 48 hours after a single 10 mg/kg dose of isotype-matched control antibody Ragweed:1428 (control) or B20-4.1.1, as indicated. (B) Quantification of the change in tumor volume over the 48 h treatment period, and of K^trans and ADC, prior to, and following, treatment with control antibody (n = 6) or B20-4.1.1 (n = 7). (C) Frequency distributions of all tumor ADC and K^trans voxels. Distributions were divided into 5 equally sized bins for each dataset, using 0–300, 300–600, 600–900, 900–1200, 1200–1500×10⁻⁶mm²sec⁻¹ for ADC and 0–02, 0.2–0.4, 0.4–0.6, 0.6–0.8, 0.8–0.1 min⁻¹ for K^trans. ^##P < .01, unpaired Student's t test between control and B20-4.1.1-treated cohorts; *P < .05, paired Student's t test.