Quantitative Ultrasonography Techniques for Assessing Femoropopliteal Atherosclerotic Lesions Using Peak Systolic Velocity Ratio: The TURN-UP Study II - Aiko Hayashi; Masahiko Fujihara; Mitsuyoshi Takahara; Yumiko Komiya; Shun Aoki; Mina Enoki; Takamitsu Miyauchi; Rika Tanimoto; Takashi Araki; Keisuke Ishida; Isao Suminoe; Masayuki Nakakura; et al. (Journal of Endovascular Therapy, 2026)