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美国伊利诺伊州的布鲁克菲尔德动物园周二为园内一只1000磅重的巨型北极熊进行首次电脑断层扫描（CT Scan），以评估其健康；研究人员还提取其精液样本，用作为它传宗接代。

雄性北极熊赫德森（Hudson）由于身形太大，一直以来都没有扫描仪器的桌子可承受其体重。园方上年幸获拨款，将扫描器的桌子特制成最大可承重2200磅，才得以安排它进行脑扫描。园方为赫德森注射镇静剂后，出动改装推土机，将其抬到检查中心。

检查期间，研究人员还提取了赫德森的精液样本，用以替美国国内其他动物园的雌性北极熊受精，以增加该种濒危动物的数量。

据国际自然保护联盟统计，野生北极熊现存总数仅剩约2万2000至3万1000只。

芝加哥动物学会临床医学副主席阿克森表示，这次扫描不但难得地让让动物学家一窥北极熊的脑部状况，更可以让他们评估赫德森的关节、内脏以及其整体健康。这些资料除了作为监察赫德森日后健康的参考，将来还可在有需要时用以与其他北极熊作比较。

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