Christensen E E, Dietz G W, Murry R C, Stokely E M, Moore J G
Invest Radiol. 1977 Sep-Oct;12(5):462-4. doi: 10.1097/00004424-197709000-00006.
A partial chest phantom was constructed to compare two commonly employed radiographic techniques, 70 kVp without a grid and 120 kVp with a grid, for the detection of pulmonary nodules. The phantom consisted of human ribs embedded in paraffin, the lungs of a dog injected with silicone rubber, a tissue equivalent wax heart and beeswax nodules. The nodules ranged in size from 3-7 mm. A series of 120 films was exposed, half with each technique, and the films were interpreted by three senior residents and seven staff radiologists. More nodules of all sizes except 3 mm were detected with the 120 kVp technique. The 3 mm nodules were rarely detected with either technique. The disadvantages of the 120 kVp technique were an approximate 50 percent increase in patient exposures and almost twice as many false-positive nodule detections.
构建了一个胸部局部体模，以比较两种常用的放射成像技术，即无滤线栅的70 kVp和有滤线栅的120 kVp，用于检测肺结节。该体模由嵌入石蜡中的人类肋骨、注入硅橡胶的狗肺、组织等效蜡质心脏和蜂蜡结节组成。结节大小范围为3 - 7毫米。共曝光了120张胶片，每种技术各曝光一半，这些胶片由三名住院医师和七名放射科主治医师进行解读。除了3毫米的结节外，120 kVp技术检测到的各种大小的结节更多。两种技术都很少能检测到3毫米的结节。120 kVp技术的缺点是患者辐射剂量增加了约50%，假阳性结节检测几乎增加了一倍。
