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\u8ba9\u5b66\u4e60\u6210\u4e3a\u4e00\u79cd\u597d\u4e60\u60ef<\/strong><\/p>\n \u6b63\u6587\u5f00\u59cb <\/p>\n \u591a\u5c42\u87ba\u65cbCT\u7684\u57fa\u672c<\/strong><\/p>\n \u7ed3\u6784\u53ca\u7279\u70b9<\/strong><\/p>\n \u4e00\u3001\u63a2\u6d4b\u5668\u9635\u5217<\/strong><\/p>\n <\/strong>\u5355\u5c42\u87ba\u65cbCT\u7684Z\u8f74\u65b9\u5411\u53ea\u6709\u4e00\u6392\u63a2\u6d4b\u5668\uff0cMSCT\u5219\u5177\u6709\u591a\u6392\u63a2\u6d4b\u5668\u9635\u5217\uff0c\u5206\u4e3a\u5bf9\u79f0\u578b\u548c\u975e\u5bf9\u79f0\u578b\u3002<\/strong><\/p>\n <\/p>\n \u56fe1 \u7b49\u5bbd\u548c\u975e\u7b49\u5bbd\u63a2\u6d4b\u5668\u9635\u5217<\/p>\n 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\u63a2\u6d4b\u5668\u5355\u5143\u4e0e\u6570\u636e\u91c7\u96c6\u901a\u9053\u7684\u7ec4\u5408\u3002\u5176\u4e2d\uff0c\u63a2\u6d4b\u5668\u5355\u5143\u662f1.25mm\u3002(1)\u5c42\u539a\u662f1.25mm\uff0c16\u5c42\uff0c16\u4e2a\u6570\u636e\u91c7\u96c6\u901a\u9053\uff1b(2)\u5c42\u539a\u662f2.5mm\uff0c8\u5c42\uff0c8\u4e2a\u6570\u636e\u91c7\u96c6\u901a\u9053\uff1b(3)\u5c42\u539a\u662f5mm\uff0c4\u5c42\uff0c4\u4e2a\u6570\u636e\u91c7\u96c6\u901a\u9053\uff1b<\/p>\n \u4e09\u3001X\u7ebf\u675f<\/strong><\/p>\n \u5728\u5355\u5c42\u87ba\u65cbCT\u4e2d\uff0c\u901a\u8fc7\u51c6\u76f4\u5668\u540e\u7684X\u7ebf\u675f\u4e3a\u8584\u6247\u5f62\uff0c\u56e0\u4e3a\u5728Z\u8f74\u65b9\u5411\u4ec5\u6709\u4e00\u6392\u63a2\u6d4b\u5668\u63a5\u6536\u4fe1\u53f7\uff0c\u4e00\u4e2a\u6570\u636e\u91c7\u96c6\u901a\u9053\uff0cX\u7ebf\u7ba1\u65cb\u8f6c\u4e00\u5468\u53ea\u80fd\u751f\u6210\u4e00\u5f20\u56fe\u50cf\uff0c\u6545X\u7ebf\u675f\u7684\u5bbd\u5ea6\u7b49\u4e8e\u5c42\u539a\uff0c\u4e3a\u8584\u6247\u5f62X\u7ebf\u675f<\/strong><\/strong>\u3002<\/p>\n <\/p>\n \u56fe3 X\u7ebf\u675f\u4e3a\u8584\u6247\u5f62<\/p>\n \u5728MSCT\u4e2d\uff0c\u7531\u4e8eZ\u8f74\u65b9\u5411\u6709\u591a\u6392\u63a2\u6d4b\u5668\u63a5\u6536\u4fe1\u53f7\uff0c\u591a\u7ec4\u6570\u636e\u91c7\u96c6\u901a\u9053\uff0cX\u7ebf\u7ba1\u65cb\u8f6c\u4e00\u5468\u80fd\u751f\u6210\u591a\u5f20\u56fe\u50cf\uff0c\u6545X\u7ebf\u675f\u7684\u5bbd\u5ea6\u7b49\u4e8e\u591a\u4e2a(2\u62164)\u5c42\u539a\u4e4b\u548c\uff0c\u4e3a\u539a\u6247\u5f62X\u7ebf\u675f(\u6216\u79f0\u9525\u5f62X\u7ebf\u675f)<\/strong>\u8986\u76d6\u63a2\u6d4b\u5668Z\u8f74\u65b9\u5411\u7684\u603b\u5bbd\u5ea6\uff0c\u6700\u539a\u53ef\u8fbe20\u621632cm\uff0c\u4f7fX\u7ebf\u7684\u5229\u7528\u7387\u5927\u5927\u63d0\u9ad8\u3002<\/p>\n <\/p>\n \u56fe4 X\u7ebf\u675f\u4e3a\u539a\u6247\u5f62<\/p>\n \u56db\u3001<\/strong>MSCT\u7684\u4e3b\u8981\u4f18\u70b9<\/strong><\/p>\n 1.\u63d0\u9ad8\u4e86X\u5c04\u7ebf\u7684\u5229\u7528\u7387<\/strong><\/p>\n \u5728\u5355\u5c42\u87ba\u65cbCT\u4e2dZ\u8f74\u65b9\u5411\u4e0a\u626b\u63cf\u5c42\u9762\u4e24\u4fa7\u7684X\u7ebf\u88ab\u6d6a\u8d39\u4e86\uff0c\u800c\u5728MSCT\u626b\u63cf\u4e2d\u88ab\u7528\u6765\u91c7\u96c6\u6570\u636e\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u4e86X\u7ebf\u7684\u5229\u7528\u7387\u3002<\/p>\n 2.CT\u900f\u89c6\u5b9a\u4f4d\u66f4\u51c6\u786e<\/strong><\/p>\n \u5355\u5c42\u87ba\u65cbCT\u4f7f\u7528CT\u900f\u89c6\u529f\u80fd\u4ec5\u80fd\u83b7\u5f97\u4e00\u4e2a\u5c42\u9762\u7684\u900f\u89c6\u56fe\u50cf\uff0cCT\u5f15\u5bfc\u4e0b\u7684\u7a7f\u523a\u6d3b\u68c0\u4ec5\u53ef\u4ee5\u5b9e\u65f6\u663e\u793a\u9488\u5c16\u7684\u4f4d\u7f6e\u3002<\/p>\n 3.\u626b\u63cf\u901f\u5ea6\u660e\u663e\u63d0\u9ad8<\/strong><\/p>\n MSCT\u7684X\u7ebf\u7ba1\u65cb\u8f6c\u4e00\u5468\u53ef\u4ee5\u626b\u63cf4~320\u5c42,X\u7ebf\u7ba1\u65cb\u8f6c\u4e00\u5468(X\u7ebf\u7ba1\u65cb\u8f6c360\u00b0)\u4ec5\u97000.27~0.35\u79d2\uff0c\u6bd4\u5355\u5c42\u87ba\u65cbCT\u5feb2\u500d\u4ee5\u4e0a\uff0c\u540c\u65f6\u626b\u63cf\u7684\u8986\u76d6\u8303\u56f4\u4e3a\u5355\u5c42\u87ba\u65cbCT\u7684\u6570\u500d\u81f3\u6570\u5341\u3001\u751a\u81f3\u6570\u767e\u500d\u3002<\/p>\n 4.\u56fe\u50cf\u7684\u8d28\u91cf\u63d0\u9ad8<\/strong><\/p>\n \u7531\u4e8eMSCT\u7684\u626b\u63cf\u901f\u5ea6\u63d0\u9ad8\uff0c\u5728\u76f8\u540c\u7684\u626b\u63cf\u65f6\u95f4\u5185\u53ef\u83b7\u5f97\u8303\u56f4\u66f4\u957f\u548c\u5c42\u9762\u66f4\u8584\uff0c\u751a\u81f3\u662f\u5404\u5411\u540c\u6027\u7684\u5bb9\u79ef\u6570\u636e\uff0c\u6709\u5229\u4e8e\u91cd\u5efa\u51fa\u9ad8\u8d28\u91cf\u7684\u6a2a\u65ad\u56fe\u50cf\u3002<\/p>\n \u4e94\u3001\u5c0f\u7ed3<\/strong><\/p>\n <\/p>\n <\/strong>\u90e8\u5206\u8d44\u6599\uff1a\u53c2\u8003\u300a\u533b\u5b66\u5f71\u50cf\u8bbe\u5907\u5b66\u300b\uff0c\u77f3\u660e\u56fd\u3001\u97e9\u4e30\u8c08\u4e3b\u7f16<\/p>\n \u53c2\u8003\u300a\u653e\u5c04\u533b\u5b66\u6280\u672f\u300b\uff0c <\/p>\n \u5ef6\u4f38\u62d3\u5c55<\/strong><\/p>\n 1.CT\u6210\u50cf\u7684\u76f8\u5173\u89c2\u5ff5<\/strong><\/p>\n (1)\u4f53\u7d20( voxel )<\/strong>\u80fd\u88abCT\u626b\u63cf\u7684\u6700\u5c0f\u4f53\u79ef\u5355\u4f4d\u3002<\/strong> CT\u626b\u63cf\u4e2d\uff0c\u6839\u636e\u65ad\u5c42\u8bbe\u7f6e\u7684\u539a\u5ea6\u3001\u77e9\u9635\u7684\u5927\u5c0f\u786e\u5b9a\u4f53\u7d20\u5927\u5c0f\u3002<\/p>\n *\u4f53\u7d20\u6709\u4e09\u8981\u7d20\uff0c\u5373\u957f\u3001\u5bbd\u3001\u9ad8\u3002<\/strong><\/p>\n *\u4f53\u7d20\u7684\u5f71\u54cd\u56e0\u7d20\uff1a\u5c42\u539a\u3001FOV\u3001\u77e9\u9635<\/strong><\/p>\n *\u901a\u5e38CT\u4e2d\u4f53\u7d20\u7684\u957f\u548c\u5bbd\u90fd\u4e3a1mm \uff0c\u9ad8\u5ea6\u6216\u6df1\u5ea6\u5219\u6839\u636e\u5c42\u539a\u53ef\u5206\u522b\u4e3a10\u30015\u30013\u30012\u30011mm\u7b49\u3002<\/strong><\/p>\n (2)\u50cf\u7d20( pixel )\u53c8\u79f0\u50cf\u5143<\/strong>\u6784\u6210CT\u56fe\u50cf\u6700\u5c0f\u7684\u5355\u4f4d<\/strong>\uff0c\u4e0e\u4f53\u7d20\u76f8\u5bf9\u5e94\uff0c\u4f53\u7d20\u7684\u5927\u5c0f\u5728CT\u56fe\u50cf\u4e0a\u7684\u8868\u73b0\uff0c\u5373\u4e3a\u50cf\u7d20\u3002<\/p>\n \u5c0f\u7ed3<\/strong><\/p>\n <\/p>\n (3)\u7a7a\u95f4\u5206\u8fa8\u7387\u53c8\u79f0\u9ad8\u5bf9\u6bd4\u5ea6\u5206\u8fa8\u7387<\/strong>\uff0c\u6307\u5728\u9ad8\u5bf9\u6bd4\u5ea6\u60c5\u51b5\u4e0b(\u5bf9\u6bd4\u5ea6>10%)\uff0c\u7cfb\u7edf\u533a\u5206\u76f8\u90bb\u5fae\u5c0f\u7ec4\u7ec7\u6216\u75c5\u7076\u7684\u80fd\u529b\uff0c\u5373\u663e\u793a\u6700\u5c0f\u4f53\u79ef\u7684\u75c5\u7076\u6216\u7ed3\u6784\u7684\u80fd\u529b\u3002\u901a\u5e38\u4ee5\u6bcf\u5398\u7c73\u7684\u7ebf\u5bf9\u6570(LP\/cm)\u8868\u793a\u3002<\/strong><\/p>\n 1)\u7a7a\u95f4\u5206\u8fa8\u7387\u7684\u5f71\u54cd\u56e0\u7d20<\/strong><\/p>\n \u2460\u7403\u7ba1\u7684\u7126\u70b9\u5c3a\u5bf8<\/strong><\/p>\n \u7126\u70b9\u8d8a\u5c0f\uff0c\u4ea7\u751f\u7684X\u7ebf\u8d8a\u7a84\uff0c\u7a7a\u95f4\u5206\u8fa8\u7387\u8d8a\u9ad8\uff1b<\/p>\n \u2461\u63a2\u6d4b\u5668\u5355\u5143\u7684\u5b54\u5f84<\/strong><\/p>\n \u63a2\u6d4b\u5668\u5c3a\u5bf8\u8d8a\u5c0f\uff0c\u7cfb\u7edf\u7684\u7a7a\u95f4\u5206\u8fa8\u7387\u8d8a\u9ad8\uff1b<\/p>\n \u2462\u5c42\u539a<\/strong><\/p>\n \u5c42\u539a\u8d8a\u8584\uff0c\u7a7a\u95f4\u5206\u8fa8\u7387\u8d8a\u9ad8\uff1b\u4f46\u540c\u65f6\u56fe\u50cf\u566a\u58f0\u589e\u5927\uff0c\u5bc6\u5ea6\u5206\u8fa8\u7387\u964d\u4f4e\uff1b<\/p>\n \u2463\u5377\u79ef\u51fd\u6570<\/strong><\/p>\n \u5e94\u7528\u589e\u5f3a\u7b97\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u7a7a\u95f4\u5206\u8fa8\u7387\uff0c\u540c\u65f6\u56fe\u50cf\u566a\u58f0\u589e\u52a0\uff1b\u800c\u5e73\u6ed1\u7b97\u6cd5\u5219\u964d\u4f4e\u7a7a\u95f4\u5206\u8fa8\u7387\uff1b<\/p>\n 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