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肺组织是一个广含气体的器官。其组织密度低易被X线穿透,但其前后、左、右和中间都被高密质组织如:心脏、纵隔、肋骨、胸骨、胸椎、锁骨、肩胛骨等遮盖,其遮盖范围广达70％,因此,有些病变极可能因为部位或体位的关系被遮盖而造成漏诊。高仟伏摄影术可解决这一难题,因为高仟伏摄影X线具有很强的穿透力,足以穿透高密度组织,而使被高密度组织所遮盖的肺组织显示出来,提高诊断效果。1997年我院引进了一台美国费莎500毫安高频胸部摄影专用机,这是一台自动上片、洗片的联动式摄影机,胸片架,片库和球管带有同步升降的联动装置,并带有电子探测系统。
Lung tissue is a gas-rich organ. Its tissue density is low and easily penetrated by X-rays. However, it is covered by high density tissue such as heart, mediastinum, rib, sternum, thoracic vertebrae, clavicle and scapula before, after, left, right and middle. , Therefore, some lesions are most likely to be missed due to site or body position. High-kv photography can solve this problem, because the high-kV radiography X-ray has a strong penetrating power, enough to penetrate high-density tissue, leaving the high-density tissue covered lung tissue is displayed to improve the diagnostic results . In 1997, our hospital introduced a US Feisa 500 mA high-frequency chest photography machine, which is an automatic on-chip, wash the film linked camera, chest rack, film library and the tube with a synchronized lift Linkage, with electronic detection system.