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: Resonant Acoustic Rheometry (RAR) is used to characterize the viscoelastic properties of soft materials, such as blood plasma or hydrogels.

"RAR" also stands for , an ultrasound-based technique. ECHOPLEX.rar

In a clinical setting, "Echo" and "RAR" (Right Atrial Remodeling) are frequently paired in cardiology research. : Resonant Acoustic Rheometry (RAR) is used to