短語詞組短語chemical selective shift imaging 化學位移選擇成象chemical -shift imaging 化學位移成像chemical shift imaging sequence 化學位移成像序列chemical shift mr imaging 化學位移成像2D chemical shift imaging 的二維化學位移成像D chemical shift imaging 的二維化學位移成像chemical shift imaging csi 化學位移成像 返回 chemical shift imaging