{"id":510,"date":"2025-12-16T22:45:32","date_gmt":"2025-12-16T13:45:32","guid":{"rendered":"https:\/\/www.jsrt.or.jp\/94rg\/cuo_ying_fen_ke_hui\/wp\/?p=510"},"modified":"2025-12-16T22:52:44","modified_gmt":"2025-12-16T13:52:44","slug":"%e7%ac%ac10%e5%9b%9ect%e5%bf%9c%e7%94%a8%e3%82%bb%e3%83%9f%e3%83%8a%e3%83%bc-%e9%96%8b%e5%82%ac%e5%a0%b1%e5%91%8a","status":"publish","type":"post","link":"https:\/\/www.jsrt.or.jp\/94rg\/cuo_ying_fen_ke_hui\/wp\/?p=510","title":{"rendered":"\u7b2c10\u56deCT\u5fdc\u7528\u30bb\u30df\u30ca\u30fc \u958b\u50ac\u5831\u544a"},"content":{"rendered":"

2025\u5e749\u670820\u65e5\uff08\u571f\uff09\uff0c21\u65e5\uff08\u65e5\uff09\u306e2\u65e5\u9593\u306b\u308f\u305f\u308a\uff0c\u4e2d\u90e8\u652f\u90e8\u306e\u5171\u50ac\u306e\u3082\u3068\uff0cJP\u30bf\u30ef\u30fc\u540d\u53e4\u5c4b5\u968e \u30df\u30c3\u30c9\u30bf\u30a6\u30f3\u30af\u30ea\u30cb\u30c3\u30af\u540d\u99c5 \u4f1a\u8b70\u5ba4\u306b\u3066\uff0c\u7b2c10\u56deCT\u5fdc\u7528\u30bb\u30df\u30ca\u30fc\u3092\u958b\u50ac\u3057\u307e\u3057\u305f\uff0e\u672c\u30bb\u30df\u30ca\u30fc\u306f\uff0cCT\u753b\u50cf\u8a08\u6e2c\u6cd5\u306e\u7406\u89e3\u3068\u7fd2\u5f97\u306b\u52a0\u3048\uff0c\u5b66\u8853\u767a\u8868\u304b\u3089\u8ad6\u6587\u5316\u306b\u81f3\u308b\u307e\u3067\u306e\u65b9\u6cd5\u8ad6\u306e\u7406\u89e3\u3092\u76ee\u7684\u3068\u3057\u3066\u958b\u50ac\u3057\u3066\u3044\u307e\u3059\uff0e
\n\u7b2c9\u56de\u3088\u308a\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u898b\u76f4\u3057\u3092\u884c\u3044\uff0cCT\u753b\u8cea\u8a55\u4fa1\u306e\u7406\u89e3\u3092\u4e00\u5c64\u6df1\u3081\u308b\u305f\u3081\u306b\u300c\u6982\u8ad6\u300d\u306e\u8b1b\u7fa9\u3092\u65b0\u305f\u306b\u8ffd\u52a0\u3057\u307e\u3057\u305f\uff0e\u3053\u308c\u306b\u3088\u308a\uff0cCT\u753b\u50cf\u306e\u753b\u8cea\u8a55\u4fa1\u306e\u57fa\u790e\u304b\u3089\u6700\u65b0\u306e\u8a55\u4fa1\u624b\u6cd5\uff0c\u8a55\u4fa1\u624b\u9806\u304a\u3088\u3073\u6ce8\u610f\u70b9\u307e\u3067\u3092\u4f53\u7cfb\u7684\u306b\u5b66\u3076\u69cb\u6210\u3068\u3057\uff0c\u5b9f\u969b\u306bPC\u3092\u7528\u3044\u305f\u8a08\u6e2c\u6f14\u7fd2\u3082\u5b9f\u65bd\u3057\u307e\u3057\u305f\uff0e\u753b\u8cea\u8a08\u6e2c\u6f14\u7fd2\u3067\u306f\uff0cTask Transfer Function\uff08TTF\uff09\uff0cNoise Power Spectrum\uff08NPS\uff09\uff0cSystem Performance\uff08SP\uff09\u306b\u52a0\u3048\uff0cDetectability Index\uff08d\u2019\uff09\u306e\u8a08\u6e2c\u3092\u884c\u3044\u307e\u3057\u305f\uff0e\u3055\u3089\u306b\uff0cCT\u691c\u67fb\u306b\u304a\u3051\u308b\u88ab\u3070\u304f\u306e\u6700\u65b0\u52d5\u5411\uff0c\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u6280\u8853\u8ad6\uff0c\u8ad6\u6587\u5316\u306b\u5411\u3051\u305f\u65b9\u6cd5\u8ad6\u306e\u8b1b\u7fa9\u3092\u542b\u3081\uff0c\u5b66\u8853\u7814\u7a76\u306b\u5fc5\u8981\u306a\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u3092\u7db2\u7f85\u3057\u305f\u5145\u5b9f\u3057\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u69cb\u6210\u3068\u3057\u307e\u3057\u305f\uff0e<\/p>\n

\u30bb\u30df\u30ca\u30fc\u306e\u5185\u5bb9\u3068\u53d7\u8b1b\u751f\u304b\u3089\u306e\u8cea\u554f\u4e8b\u9805<\/strong><\/p>\n

CT\u753b\u50cf\u306e\u753b\u8cea\u8a55\u4fa1\u6982\u8ad6<\/strong>
\nCT\u753b\u50cf\u8a55\u4fa1\u306e\u6982\u8ad6\u3068\u3057\u3066\uff0c\u7a7a\u9593\u5206\u89e3\u80fd\uff0c\u30ce\u30a4\u30ba\uff0cCNR\uff0cSNR\uff0cSPF\uff0c\u4f4e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u691c\u51fa\u80fd\uff0cDetectability index ( d\u2019)\uff0c\u30b9\u30e9\u30a4\u30b9\u539a(SSP MTF Z)\uff0c\u6642\u9593\u5206\u89e3\u80fd\u306e\u89e3\u8aac\u3068\uff0c\u7d50\u679c\u306e\u8a55\u4fa1\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8b1b\u7fa9\u304c\u884c\u308f\u308c\u305f\uff0e
\n\u53d7\u8b1b\u751f\u304b\u3089\u306e\u4e3b\u306a\u8cea\u554f
\n\u30fbMTF\u6e2c\u5b9a\u306f\u7dda\u5f62\u6027\u304c\u4fdd\u305f\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u524d\u63d0\u3068\u8a00\u308f\u308c\u3066\u3044\u308b\u304c\uff0c\u9010\u6b21\u8fd1\u4f3c\u518d\u69cb\u6210\u753b\u50cf\u3084DLR\u306a\u3069\u306e\u975e\u7dda\u5f62\u753b\u50cf\u306b\u7528\u3044\u308b\u3053\u3068\u306f\u6570\u5b66\u7684\u306b\u9593\u9055\u3044\u3067\u306f\u306a\u3044\u306e\u304b\uff0e<\/p>\n

CT\u753b\u50cf\u306e\u753b\u8cea\u8a55\u4fa1\u3010Basic\u3011 \u7dda\u5f62\u753b\u50cf\u306e\u8a55\u4fa1<\/strong>
\nCT\u753b\u50cf\u306e\u753b\u50cf\u8a08\u6e2c(MTF\uff0cSD\uff0cNPS\uff0cCNR\uff0cSP)\u306e\u7406\u8ad6\u3092\u57fa\u672c\u539f\u7406\u304b\u3089\u8a73\u3057\u304f\u8b1b\u7fa9\u304c\u884c\u308f\u308c\u305f\uff0e
\n\u53d7\u8b1b\u751f\u304b\u3089\u306e\u4e3b\u306a\u8cea\u554f
\n\u30fb5\uff05\u3082\u3057\u304f\u306f10\uff05MTF\u306e\u5024\u304c\u540c\u3058\u5834\u5408\u306f\uff0c\u89e3\u50cf\u7279\u6027\u306f\u540c\u3058\u3068\u3068\u3089\u3048\u3066\u826f\u3044\u306e\u304b\uff0e
\n\u30fbNPS\u3092\u6e2c\u5b9a\u3057\u3066\u30b0\u30e9\u30d5\u306e\u4f4e\u5468\u6ce2\u5074\u304c\u8df3\u306d\u4e0a\u304c\u3063\u3066\u3057\u307e\u3046\u306e\u7406\u7531\u306f\u4f55\u304b\uff0e
\n\u30fbSPF\u306e\u8a55\u4fa1\u65b9\u6cd5\u306b\u3064\u3044\u3066\uff0c\u7dda\u5f62\u753b\u50cf\u3067\u518d\u69cb\u6210\u95a2\u6570\u306e\u9055\u3044\u3088\u308b\u5909\u5316\u3092\u8a55\u4fa1\u3059\u308b\u3053\u3068\u306e\u610f\u5473\u306f\uff0e
\n\u30fbSPF\u306e\u30b0\u30e9\u30d5\u3067\u9ad8\u5468\u6ce2\u5074\u304c\u4e0a\u304c\u3063\u3066\u3057\u307e\u3046\u7406\u7531\u306f\uff0e<\/p>\n

CT\u753b\u50cf\u306e\u753b\u8cea\u8a55\u4fa1\u3010Advance\u3011 \u975e\u7dda\u5f62\u753b\u50cf\u306e\u8a55\u4fa1<\/strong>
\n\u9010\u6b21\u8fd1\u4f3c\u518d\u69cb\u6210\u6cd5\u306e\u753b\u50cf\u518d\u69cb\u6210\u6cd5\uff0c\u975e\u7dda\u5f62\u753b\u50cf\u306e\u7279\u5fb4\uff0c\u975e\u7dda\u5f62\u753b\u50cf\u306e\u753b\u8cea\u8a55\u4fa1(TTF\u3092\u542b\u3080)\u306b\u3064\u3044\u3066\u8b1b\u7fa9\u304c\u884c\u308f\u308c\u305f\uff0e
\n\u53d7\u8b1b\u751f\u304b\u3089\u306e\u4e3b\u306a\u8cea\u554f
\n\u30fbTTF\u306e\u30b3\u30f3\u30c8\u30e9\u30b9\u30c8\u5dee\u306f\u3069\u306e\u304f\u3089\u3044\u307e\u3067\u6e2c\u5b9a\u53ef\u80fd\u306a\u306e\u304b\uff0e
\n\u30fbTTF\u3092\u8a08\u6e2c\u3059\u308b\u305f\u3081\u306e\u30d5\u30a1\u30f3\u30c8\u30e0\u3092\u4f5c\u6210\u3059\u308b\u6642\u306b\uff0c\u6c34\u3092\u5e0c\u91c8\u9020\u5f71\u5264\u306b\u7f6e\u304d\u63db\u3048\u3066\u3082\u826f\u3044\u306e\u304b\uff1f
\nCT\u753b\u50cf\u306e\u753b\u8cea\u8a55\u4fa1\u6700\u524d\u7dda(\u542b\u3080\uff0cPhoton counting CT)
\n\u30bf\u30b9\u30af\u30d9\u30fc\u30b9\u306e\u753b\u8cea\u8a55\u4fa1(\u30b9\u30e9\u30a4\u30b9\u539a\u3092\u542b\u3080)\uff0c1mm\u306e\u30e8\u30fc\u30c9\u30ef\u30a4\u30e4\u30fc\u306e\u89e3\u50cf\u7279\u6027\u306e\u8a55\u4fa1\u65b9\u6cd5(\u88c5\u7f6e\u9593\u306e\u9055\u3044\u3092\u542b\u3080)\uff0c\u4e0d\u5747\u4e00\u30d5\u30a1\u30f3\u30c8\u30e0\u3092\u7528\u3044\u305f\u30ce\u30a4\u30ba\u8a55\u4fa1\uff0cphoton counting CT\u306e\u753b\u8cea\u7279\u6027\u306b\u3064\u3044\u3066\u8b1b\u7fa9\u304c\u884c\u308f\u308c\u305f\uff0e<\/p>\n

\u753b\u50cf\u8a55\u4fa1\u6f14\u7fd2(PC\u3092\u7528\u3044\u305f\u8a08\u6e2c\u6f14\u7fd2)<\/strong>
\n\u7dda\u5f62\u753b\u50cf\u306e\u753b\u50cf\u8a08\u6e2c\u3068\u3057\u3066\uff0c\u4eee\u60f3\u30b9\u30ea\u30c3\u30c8\u6cd5\u306b\u3088\u308bMTF\u6e2c\u5b9a\uff0cRadial NPS\u306e\u6e2c\u5b9a\u3092\u884c\u3044\uff0cSNR\u306e\u7b97\u51fa\u3092\u884c\u3063\u305f\uff0e\u5f15\u304d\u7d9a\u304d\uff0c\u975e\u7dda\u5f62\u753b\u50cf\u306e\u753b\u50cf\u8a08\u6e2c\u3068\u3057\u3066ACR\u30d5\u30a1\u30f3\u30c8\u30e0\u3092\u7528\u3044\u3066\uff0cCircular Edge\u6cd5\u306b\u3088\u308bMTF\u6e2c\u5b9a\uff0cNPS\u6e2c\u5b9a\u3092\u884c\u3044\uff0cdetectability index\u306e\u7b97\u51fa\u3092\u884c\u3063\u305f\uff0e<\/p>\n

CT\u691c\u67fb\u88ab\u3070\u304f\u306b\u95a2\u3059\u308b\u6700\u65b0\u52d5\u5411<\/strong>
\nCT\u691c\u67fb\u306e\u7dda\u91cf\u8a55\u4fa1\u5024\u306b\u3064\u3044\u3066\uff0cIEC\uff0cJIS\u898f\u683c\u306e\u6700\u65b0\u60c5\u5831(SSDE\u3092\u542b\u3080)\u306b\u3064\u3044\u3066\uff0c\u8b1b\u7fa9\u304c\u884c\u308f\u308c\u305f\uff0e
\n\u53d7\u8b1b\u751f\u304b\u3089\u306e\u4e3b\u306a\u8cea\u554f
\n\u30fb\u30d3\u30fc\u30e0\u5e4556 mm\u306eCT\u88c5\u7f6e\u306eCTDI\u306e\u6e2c\u5b9a\u6cd5\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u304b\uff0cCTDIfree air\u3092\u6e2c\u5b9a\u3059\u308b\u3068\u304d\u306e\u96fb\u96e2\u7bb1\u306e\u6709\u52b9\u9577\u306f\u4f55mm\u3092\u7528\u3044\u308c\u3070\u826f\u3044\u306e\u304b\uff0e<\/p>\n

\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u6280\u8853\u8ad6<\/strong>
\n\u5177\u4f53\u7684\u306a\u4f8b\uff08\u60aa\u3044\u4f8b\uff0c\u826f\u3044\u4f8b\uff09\u3092\u6319\u3052\u306a\u304c\u3089\uff0c\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u4f5c\u6210\u624b\u6cd5 (\u30d5\u30a9\u30f3\u30c8\uff0c\u884c\u6570\uff0c\u884c\u9593\uff0c\u8868\u7d44\uff0c\u30b0\u30e9\u30d5\u306a\u3069)\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u305f\uff0e
\n\u53d7\u8b1b\u751f\u304b\u3089\u306e\u4e3b\u306a\u8cea\u554f
\n\u30fb\u5171\u540c\u6f14\u8005\u306e\u66f8\u304f\u9806\u756a\u306b\u6c7a\u307e\u308a\u306f\u3042\u308b\u304b
\n\u30fb\u300c\u4f7f\u7528\u6a5f\u5668\u30b9\u30e9\u30a4\u30c9\u304b\u3089\u306e\u8131\u5374\u300d\u3068\u306f\u3069\u3046\u3044\u3046\u610f\u56f3\u304b
\n\u30fb\u30b0\u30e9\u30d5\u306e\u51e1\u4f8b\u306f\u77e2\u5370\u3067\u793a\u3059\u3079\u304d\u3068\u8a71\u304c\u3042\u3063\u305f\u304c\uff0c8\u672c\u304c\u91cd\u306a\u308a\u5408\u3046\u3088\u3046\u306a\u30b0\u30e9\u30d5\u3067\u306f\uff0c\u306e\u3088\u3046\u306b\u51e1\u4f8b\u3092\u793a\u3059\u3079\u304d\u304b\u3059\u3079\u304d\u304b\uff1f<\/p>\n

CT\u7814\u7a76\u8ad6\u6587\u306b\u304a\u3051\u308b\u65b9\u6cd5\u8ad6<\/strong>
\n\u8ad6\u6587\u3092\u66f8\u304f\u610f\u7fa9\uff0c\u8ad6\u6587\u3092\u66f8\u304f\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u30eb\u30fc\u30eb\uff0c\u691c\u7d22\u65b9\u6cd5\u306a\u3069\u3092\u8a73\u7d30\u306b\u89e3\u8aac\u3057\u305f\uff0e<\/p>\n

\u753b\u50cf\u8a08\u6e2c\u306b\u95a2\u3059\u308b\u8b1b\u7fa9\u3067\u306f\uff0c\u91d1\u6ca2\u5927\u5b66\u306e\u5e02\u5ddd\u52dd\u5f18\u5148\u751f\uff0c\u5317\u6d77\u9053\u79d1\u5b66\u5927\u5b66\u306e\u4f50\u85e4\u5148\u751f\u306b\uff0c\u5341\u5206\u306a\u6642\u9593\u3092\u304b\u3051\u3066\u4e01\u5be7\u306b\u3054\u89e3\u8aac\u3044\u305f\u3060\u304d\u307e\u3057\u305f\uff0e\u307e\u305f\uff0c\u53c2\u52a0\u8005\u304b\u3089\u306e\u8cea\u554f\u306b\u5bfe\u3057\u3066\u3082\u8a73\u7d30\u304b\u3064\u7684\u78ba\u306b\u3054\u56de\u7b54\u3044\u305f\u3060\u304d\u307e\u3057\u305f\uff0e\u5bfe\u9762\u958b\u50ac\u3067\u3042\u3063\u305f\u3053\u3068\u304b\u3089\uff0c\u53d7\u8b1b\u751f\u306e\u7406\u89e3\u5ea6\u3084\u53cd\u5fdc\u3092\u78ba\u8a8d\u3057\u306a\u304c\u3089\u9032\u3081\u3066\u3044\u305f\u3060\u3051\u305f\u70b9\u3082\uff0c\u7406\u89e3\u4fc3\u9032\u306b\u5927\u304d\u304f\u5bc4\u4e0e\u3057\u305f\u3082\u306e\u3068\u8003\u3048\u307e\u3059\uff0e
\n\u53d7\u8b1b\u5f8c\u30a2\u30f3\u30b1\u30fc\u30c8\u3067\u306f\uff0c\u300c\u671f\u5f85\u4ee5\u4e0a\u306e\u5185\u5bb9\u3067\u3042\u3063\u305f\u300d\u304c85\uff05\uff0c\u300c\u671f\u5f85\u901a\u308a\u306e\u5185\u5bb9\u3067\u3042\u3063\u305f\u300d\u304c15\uff05\u3068\uff0c\u975e\u5e38\u306b\u9ad8\u3044\u6e80\u8db3\u5ea6\u304c\u5f97\u3089\u308c\uff0c\u672c\u30bb\u30df\u30ca\u30fc\u306e\u5185\u5bb9\u304c\u9ad8\u304f\u8a55\u4fa1\u3055\u308c\u305f\u3082\u306e\u3068\u8003\u3048\u3066\u3044\u307e\u3059\uff0e\u8b1b\u5e2b\u306e\u5148\u751f\u65b9\uff0c\u4e2d\u90e8\u652f\u90e8\u306e\u95a2\u4fc2\u8005\u306e\u7686\u69d8\uff0c\u306a\u3089\u3073\u306b\u71b1\u5fc3\u306b\u53d7\u8b1b\u3057\u3066\u304f\u3060\u3055\u3063\u305f\u53c2\u52a0\u8005\u306e\u7686\u69d8\u306b\uff0c\u5fc3\u3088\u308a\u611f\u8b1d\u7533\u3057\u4e0a\u3052\u307e\u3059\uff0e
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