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计算机断层X射线机（CT）、远距离钴-60放射治疗机和铱-192内置后装治疗机现已广泛地应用于当今的医疗部门。由于它们比普通X射线机的射线能量高、剂量大，因而了解它们在工作状态下室内剂量的分布并加强相应的防护措施就极为重要，为此我们作了这3种射线装置的剂量场分布测量
Computed tomography (CT), long-range cobalt-60 radiotherapy machines and iridium-192 built-in after-treatment machines are now widely used in today’s healthcare sector. Because of their higher energy and higher dose than conventional X-ray machines, it is important to understand the distribution of indoor doses and the corresponding protective measures at work. For this purpose we have done a dose field distribution measuring