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Relationship of injected POL22 with iodine to the needle tip. Measurement of the distance from the centroid of the injected POL22 with iodine (4 mL) to the needle tip in ex vivo liver, based on cone beam CT, for four needles: SEHN, MSHN, MPIN-1cm, and MPIN-2cm (a–d, respectively). Sample size of n = 3 for all needles, except for MPIN-2cm, n = 9. Error bars represent standard deviations of mean value.
