Methods: TOCA was labeled with 99mTc using HYNIC as bifunctional chelator, EDDA and tricine as coligand.

• 方法:以HYNIC为双功能螯合剂(bifunctionalchelator,BFC),乙二胺-N,N’-二乙酸(EDDA)和三(羟甲基)甲基甘氨酸(Tricine)为协同配体进行TO-CA的99mTc标记;