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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Ultrasound Med Biol. 2016 Mar 3;42(6):1251–1262. doi: 10.1016/j.ultrasmedbio.2016.01.004

Fig. 8.

Fig. 8

Example of a prostate cancer index lesion (green and purple) in the anterior stroma that was missed in ARFI imaging (no suspicious regions identified). A representative ARFI image (right) from the midgland reveals a bright central structure corresponding to the BPH/atrophy adjacent to the midline on the patient’s right, but the anterior stroma of the prostate could not be reliably evaluated because of stiffness heterogeneity introduced by the BPH and atrophy. There is also shadowing and a region of decorrelation on the patient’s left resulting from a posterior calcification in the prostate (hypo-echoic regions in the B-mode image) that can also complicate interpretation of the ARFI image. ARFI = acoustic radiation force impulse; BPH = benign prostatic hyperplasia.