[1] Univ Ulsan, Dept Radiol, Asan Med Ctr, Coll Med, 88 Olymp Ro 43 Gil, Seoul 05505, South Korea
[2] Univ Ulsan, Res Inst Radiol, Asan Med Ctr, Coll Med, 88 Olymp Ro 43 Gil, Seoul 05505, South Korea
[3] Univ Ulsan, Dept Oncol, Asan Med Ctr, Coll Med, Seoul, South Korea
[4] Univ Ulsan, Dept Pathol, Asan Med Ctr, Coll Med, Seoul, South Korea
[5] Univ Ulsan, Dept Nucl Med, Asan Med Ctr, Coll Med, Seoul, South Korea
[6] Harvard Med Sch, Dana Farber Canc Inst, Brigham & Womens Hosp, Dept Imaging, Boston, MA USA
[7] Case Western Reserve Univ, Dept Imaging, UH Cleveland Med Ctr, Cleveland, OH 44106 USA