^○Mitsuyuki Takahashi¹, Hiroyuki Yamzaki², Hiroaki Minami³ (1.Federation Of National Public Service Personnel Mutual Aid Associations Yokohama Sake Kyosai Hospital, 2.静岡済生会総合病院, 3.国家公務員共済組合 連合会 横浜南共済病院)

^○Hisashi Kitagawa (Department of Radiological technology,Jikei University Hospital)