[1] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Radiol, Seoul 138736, South Korea
[2] Univ Ulsan, Coll Med, Asan Med Ctr, Res Inst Radiol, Seoul 138736, South Korea
[3] Human Med Imaging & Intervent Ctr, Dept Radiol, Seoul 137902, South Korea
[4] Catholic Univ Korea, Seoul St Marys Hosp, Coll Med, Dept Radiol, Seoul 137701, South Korea
[5] Seoul Natl Univ, Coll Med, Dept Radiol, Seoul 110744, South Korea
[6] Daerim St Marys Hosp, Dept Radiol, Seoul 150070, South Korea
[7] Daerim St Marys Hosp, Thyroid Ctr, Seoul 150070, South Korea
[8] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Radiol, Seoul 135710, South Korea
[9] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Ctr Imaging Sci, Seoul 135710, South Korea
[10] Yonsei Univ, Coll Med, Dept Radiol, Seoul 120752, South Korea
[11] Dong A Univ, Med Ctr, Dept Radiol, Pusan 602713, South Korea
[12] Inje Univ, Coll Med, Busan Paik Hosp, Dept Radiol, Pusan 633165, South Korea
[13] Hanyang Univ, Coll Med, Hanyang Univ Hosp, Dept Radiol, Seoul 133792, South Korea
[14] Haeundae Healings Hosp, Dept Radiol, Pusan 613101, South Korea
[15] Korea Univ, Coll Med, Ansan Hosp, Dept Radiol, Ansan 425707, South Korea
[16] Chung Ang Univ, Coll Med, Chung Ang Univ Hosp, Dept Radiol, Seoul 156755, South Korea
[17] Chung Ang Univ, Coll Med, Chung Ang Univ Hosp, Thyroid Ctr, Seoul 156755, South Korea
[18] Mothers Clin, Dept Radiol, Songnam 463821, South Korea
[19] CHA Univ, Coll Med, Gangnam CHA Hosp, Dept Radiol, Seoul 135081, South Korea
[20] Ajou Univ, Sch Med, Dept Radiol, Suwon 443721, South Korea
[21] UNMEC Clin, Dept Radiol, Taegu 704910, South Korea
[22] Dr Hans Breast Clin, Dept Radiol, Seoul 135892, South Korea
[23] Myung Jindan Hlth Care Ctr, Dept Radiol, Seoul 157927, South Korea
[24] Philip Med Ctr, Thyroid Clin, Dept Radiol, Seoul 150042, South Korea