慎重对待孕妇和哺乳妇女的核医学检查与治疗

对孕妇进行核医学检查或治疗时，放射性药物经胎盘转运而分布于胎儿组织造成对胎儿的内照射，孕妇器官和组织的放射性药物对胎儿构成外照射。许多放射性药物可经乳汁转运到婴儿体内。孕妇和哺乳妇女在接受核医学检查和治疗过程中，应慎重判断其实践的正当性，采取最优化的防护措施，最大限度地避免或减少电离辐射对胚胎、胎儿或婴儿的影响。

Cautions to procedures involving nuclear medicine in pregnant and breast-feeding women

When pregnant women are examined or treated with procedures involving nuclear medicine,radioactive agents can distribute to fetal tissues resulting from placental transfer and cause internal irradiation to the fetuses and external irradiation from mothers' organs and tissues to them.Many of radioactive drugs can be transferred to the bodies of the infants from mothers by breast-feeding.When women during pregnancy and breast-feeding receive examinations and therapy involving nuclear medicine,they should caution their necessity and relevance.Optimal protective measures should be taken for the women to avoid or minimize health consequences of ionizing radiation in their embryoes,fetuses or infants.Relevant regulations,requirements and recommendations for procedures involving nuclear medicine are also provided in the paper.