1、1 /GE Healthcare Technologies DXR Application/2022-6-30圖像后處理參數(shù)的調(diào)節(jié)圖像后處理參數(shù)的調(diào)節(jié)Application team后處理參數(shù)都有哪些 后處理參數(shù)都有哪些 Contract AdjustContract AdjustBrightness AdjustBrightness AdjustTissue Contract Tissue Contract Reduce NoiseReduce NoiseEdgeEdgeUnder PenetratedUnder PenetratedOver PenetratedOver Penetrate

2、dTissue EqualizationTissue Equalization4 /GE Healthcare Technologies DXR Application/2022-6-30Contrast Adjust對(duì)比度調(diào)節(jié)GE Confidential Distribute to Authorized Individuals OnlyGE Confidential Distribute to Authorized Individuals Only5 /GE Healthcare Technologies DXR Application/2022-6-300DensityPIXEL0.2L

3、UT曲線3.2ROILUT曲線-密度調(diào)節(jié)曲線最黑最白Contrast Adjust 數(shù)值越小,對(duì)比度越高。7 /GE Healthcare Technologies DXR Application/2022-6-300DensityPIXEL0.2LUT曲線3.2ROILUT曲線-Contract8 /GE Healthcare Technologies DXR Application/2022-6-30Contrast Adjust9 /GE Healthcare Technologies DXR Application/2022-6-30Brightness Adjust亮度調(diào)節(jié)GE Co

4、nfidential Distribute to Authorized Individuals OnlyGE Confidential Distribute to Authorized Individuals OnlyBrightness Adjust 數(shù)值越大,亮度越高。11 /GE Healthcare Technologies DXR Application/2022-6-300DensityPIXEL0.2LUT曲線3.2LUT曲線-Brightness12 /GE Healthcare Technologies DXR Application/2022-6-30Brightness

5、Adjust13 /GE Healthcare Technologies DXR Application/2022-6-30Tissue Equalization組織均衡GE Confidential Distribute to Authorized Individuals OnlyGE Confidential Distribute to Authorized Individuals Only14 /GE Healthcare Technologies DXR Application/2022-6-3015 /GE Healthcare Technologies DXR Applicatio

6、n/2022-6-300DensityPIXEL0.2LUT曲線3.2ROILUT曲線-TE16 /GE Healthcare Technologies DXR Application/2022-6-30組織均衡組織均衡FDA 認(rèn)證認(rèn)證設(shè)定閾值，分解設(shè)定閾值，分解圖像數(shù)據(jù)圖像數(shù)據(jù)新的新的LUT新的新的 LUT標(biāo)準(zhǔn)標(biāo)準(zhǔn)DR圖圖像像組織均衡組織均衡圖像圖像+17 /GE Healthcare Technologies DXR Application/2022-6-30先進(jìn)的圖像處理組織均衡更寬廣的動(dòng)態(tài)范圍使得一次曝光能夠顯示更多的信息把密度高（偏白）的部分把密度高（偏白）的部分圖像優(yōu)化，圖像優(yōu)化，

7、areaarea控制調(diào)控制調(diào)多少大面積，多少大面積，StrengthStrength控控制調(diào)到什么程度，制調(diào)到什么程度，白的調(diào)黑，不影響其它部白的調(diào)黑，不影響其它部分分把密度低（偏暗）的部把密度低（偏暗）的部分圖像優(yōu)化，分圖像優(yōu)化，areaarea控制控制調(diào)多少大面積。調(diào)多少大面積。StrengthStrength控制調(diào)到什么控制調(diào)到什么程度，程度，黑的更灰，又不影響其黑的更灰，又不影響其它部分它部分兩個(gè)區(qū)域：曝光不足、曝光過(guò)度 ；兩個(gè)參數(shù)量：Area 、Strength18 /GE Healthcare Technologies DXR Application/2022-6-30調(diào)節(jié)AREA

8、參數(shù)柱狀分布圖THIN AreaNumber of pixelsPixel value0.30.6THICK Area增加Area數(shù)值等于選擇更多的像素提供給組織均衡來(lái)處理19 /GE Healthcare Technologies DXR Application/2022-6-30調(diào)節(jié)STRENGTH 參數(shù)在過(guò)度曝光和曝光不足的區(qū)域中調(diào)節(jié)信號(hào)強(qiáng)度和對(duì)比度-保證軟組織到骨組織都能清晰可見(jiàn)20 /GE Healthcare Technologies DXR Application/2022-6-30組織均衡組織均衡無(wú)組織均衡無(wú)組織均衡組織均衡組織均衡21 /GE Healthcare Techn

9、ologies DXR Application/2022-6-30針對(duì)過(guò)度曝光部分的均衡針對(duì)過(guò)度曝光部分的均衡 無(wú)組織均衡無(wú)組織均衡組織均衡組織均衡22 /GE Healthcare Technologies DXR Application/2022-6-30Tissue contrast組織對(duì)比度GE Confidential Distribute to Authorized Individuals OnlyGE Confidential Distribute to Authorized Individuals OnlyTissue contrast-該參數(shù)調(diào)節(jié)圖像上的階差。范圍從-0.15

10、到 +0.15。Tissue contrast這是同一原始數(shù)據(jù)在其它參數(shù)不變的情況下，tissue contrast 值為下限-0.15的處理效果Tissue Contrast這是同一原始數(shù)據(jù)在其它參數(shù)不變的情況下，tissue contrast 值為上限+0.15的處理效果Tissue Contrast通過(guò)具體圖像我們來(lái)了解其效果，這張圖像是Factory 3默認(rèn)的值0.05Tissue Contrast對(duì)比研究可得出結(jié)論，該值越小高、低密度部分之間會(huì)對(duì)比越低；反之對(duì)比越高。28 /GE Healthcare Technologies DXR Application/2022-6-30Edg

11、e邊緣增強(qiáng)GE Confidential Distribute to Authorized Individuals OnlyGE Confidential Distribute to Authorized Individuals OnlyEdge數(shù)值越大,圖像銳利度越高,數(shù)值范圍在1-10之間30 /GE Healthcare Technologies DXR Application/2022-6-30銳利度銳利度 edge定義：圖像上高密度和低密度組織之間的對(duì)比度。定義：圖像上高密度和低密度組織之間的對(duì)比度。 銳利度是建立在對(duì)比度基礎(chǔ)之上的，如果相鄰兩部分密度移行距離越銳利度是建立在對(duì)比度基

12、礎(chǔ)之上的，如果相鄰兩部分密度移行距離越 短，則銳利度越高。短，則銳利度越高。S=(D1-D2)/H 低銳利度低銳利度高銳利度高銳利度31 /GE Healthcare Technologies DXR Application/2022-6-30Noise Reduction降噪處理GE Confidential Distribute to Authorized Individuals OnlyGE Confidential Distribute to Authorized Individuals OnlyNoise Reduction分為None/low/medium/high四檔，絕大部分默認(rèn)協(xié)議的是none。其功能是消除/降低噪聲（noise）。Noise Reduction腰椎側(cè)位片Noise redu