Newton D
AJR Am J Roentgenol. 1977 Aug;129(2):327-8. doi: 10.2214/ajr.129.2.327.
Techniques of body radioactivity measurement were used to study the clearance of activated tantalum oxide accidentally inhaled by three reactor workers. The whole-body retention after 7 days was about 1% of the initial deposit. In one subject studied for a further 424 days the residual activity in the thorax was cleared with a biological half-life of about 1,400 days. The results support indications from other studies that tantalum powder administered in aerosol bronchography may be subject to prolonged alveolar retention.
采用人体放射性测量技术研究了3名反应堆工作人员意外吸入活性氧化钽后的清除情况。7天后全身滞留量约为初始沉积量的1%。在一名进一步研究了424天的受试者中，胸部的残留活性以约1400天的生物半衰期被清除。这些结果支持了其他研究的迹象，即在气溶胶支气管造影中使用的钽粉可能会在肺泡中长期滞留。
