The main goal for this pilot level study is to correlate ultrasound elastography technique with more standard clinically based outcome measures within the setting of a small sample sized group of patients affected by moderate-to- severe, chronic (> 6 months) midsubstance Achilles tendinopathy (AT). Investigators will conduct a 24-week, 2-arm randomized controlled pilot study to determine whether novel elastography techniques (AE) and shear wave imaging (SWI), a new quantitative method of ultrasound (US) imaging, correlate with valid clinical outcome measures (VISA-A and conventional US). Methods will be based on recently published clinical trials of autologous blood injections for treating AT and will incorporate novel US outcome measures of Achilles tendon appearance and stiffness, i.e. elasticity. The results of this multi-disciplinary pilot study will be used to help plan a separate larger scaled study to evaluate the effects of platelet-rich plasma (PRP) therapy for Achilles tendinopathy in which elastography will be included as a potential outcome measure and also correlated with standard clinical outcome surveys.