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Representative ultrasound of an inflation sequence. (A) vessel cross section at no pressure, (B) 70 mmHg (9332.5 Pa), (C) 120 mmHg (15998.7 Pa). The dotted line indicates the area that appeared to be fixed, with the wall inflating outward from this line. (D) MTM in the circumferential direction at axial in situ stretch for the different test protocols.
