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Arterial wall motion is an essential feature of a healthy cardiovascular system and it is known that wall motion is affected by age and disease. In recent years, methods have been developed for measurement of wall motion with the intention of providing diagnostically useful information. An issue with all of these techniques is the accuracy and variability of both wall motion and derived quantities such as elasticity, which requires the development of suitable test tools. In this paper, a vessel wall phantom is described for use in ultrasound studies of wall motion. The vessel was made from polyvinyl alcohol (PVA) subjected to a freeze-thaw process to form a cryogel (PVA-C). The elastic modulus, acoustic velocity and attenuation coefficient varied from 57 kPa, 1543 m s⁻¹ and 0.18 dB cm⁻¹ MHz⁻¹ for one freeze-thaw cycle to 330 kPa, 1583 m s⁻¹ and 0.42 dB cm⁻¹ MHz⁻¹ for 10 freeze-thaw cycles. Wall motion was …