IVIM-MRI在直腸癌不同短徑淋巴結(jié)良惡性鑒別診斷的價(jià)值研究
發(fā)布時(shí)間:2020-05-23 04:54
【摘要】:目的:探討體素內(nèi)不相干運(yùn)動(dòng)成像(intravoxel incoherent motion magnetic resonance imaging,IVIM-MRI)對(duì)直腸癌不同短徑淋巴結(jié)良惡性的鑒別價(jià)值。方法:本研究共收集60例(149個(gè)淋巴結(jié))經(jīng)手術(shù)病理證實(shí)的直腸癌患者。所有患者術(shù)前行常規(guī)MRI及IVIM檢查,在常規(guī)MRI上測(cè)量每個(gè)淋巴結(jié)的短徑值,將淋巴結(jié)的原始IVIM數(shù)據(jù)導(dǎo)入后處理工作站,應(yīng)用雙指數(shù)模型計(jì)算得到標(biāo)準(zhǔn)表觀擴(kuò)散系數(shù)(standard apparent diffusion coefficient,standard ADC)、真性擴(kuò)散系數(shù)(true diffusion coefficient,D)、假性擴(kuò)散系數(shù)(perfusion-related diffusion coefficient,D*)及灌注分?jǐn)?shù)(perfusion fraction,f)。將所有淋巴結(jié)按照其短徑(x)值的大小分為3個(gè)亞組:3mm≤x≤4mm,4mmx≤8mm和x8mm。應(yīng)用獨(dú)立樣本t檢驗(yàn)比較分析各亞組中轉(zhuǎn)移性和非轉(zhuǎn)移性淋巴結(jié)的短徑值和IVIM參數(shù)值,對(duì)有統(tǒng)計(jì)學(xué)差異的指標(biāo)進(jìn)一步利用頻率變量繪制受試者工作特征(Receiver operating characteristic,ROC)分析其診斷效能。結(jié)果:在3mm≤x≤4mm m的亞組中,轉(zhuǎn)移性淋巴結(jié)的平均D值(0.00094±0.00025 mm~2/s)明顯低于非轉(zhuǎn)移淋巴結(jié)(0.00124±0.00027mm~2/s)(P0.05)。在4mmx≤8mm的亞組中,轉(zhuǎn)移性淋巴結(jié)的平均f值(0.28330±0.10068)明顯低于非轉(zhuǎn)移性淋巴結(jié)(0.34436±0.09474)(P0.05)。而在x8mm的亞組中,轉(zhuǎn)移淋巴結(jié)的短徑(11.33±2.28mm)明顯大于非轉(zhuǎn)移淋巴結(jié)(8.60±0.48mm)(P0.05),而所有IVIM相關(guān)參數(shù)在轉(zhuǎn)移性和非轉(zhuǎn)移性淋巴結(jié)間均無明顯統(tǒng)計(jì)學(xué)差異。以上各亞組中具有統(tǒng)計(jì)學(xué)差異的指標(biāo)對(duì)區(qū)分轉(zhuǎn)移性淋巴結(jié)和非轉(zhuǎn)移性淋巴結(jié)的曲線下面積(area under the curve,AUC)、敏感性、特異性和截?cái)嘀捣謩e如下:3mm≤x≤4mm,D,0.779,83.7%,66.7%和0.001035mm~2/s;4mmx≤8mm,f,0.707,72.7%,71.1%和0.308;x8mm,短徑,0.905,94.7%,75.0%和8.835mm(P0.05)。結(jié)論:IVIM有利于鑒別直腸癌轉(zhuǎn)移性和非轉(zhuǎn)移性淋巴結(jié),但其價(jià)值受淋巴結(jié)大小的影響。
【圖文】:
圖 1:一短徑為 3.4 mm 的非轉(zhuǎn)移性淋巴結(jié)(白色箭頭),位于腫瘤左側(cè)。圖 a-g 分別代表軸位T2WI、IVIM DWI(b = 1200s / mm2)、標(biāo)準(zhǔn) ADC、D、D *、f 偽彩圖及病理組織切片圖(×100 倍)。IVIM 各參數(shù)值如下:ADC = 0.00107 mm2/ s;D = 0.000694 mm2/ s;D * = 0.00397 mm2/ s;f = 0.465。Fig.1 Ahistopathologically proved nonmetastatic lymph node (white arrow) was located on the leftside of the tumor, with short-axis diameter of 3.4 mm.a-g, axisal T2WI, axial IVIM DWI(b=1200s/mm2), standard ADC, D, D*, f images and HE histological section (×100), respectively.standardADC=0.00107 mm2/s, D=0.000694 mm2/s, D*=0.00397 mm2/s, f=0.465.
圖 2:一短徑為 4.0mm 的非轉(zhuǎn)移性淋巴結(jié)(白色箭頭),位于腫瘤右側(cè)。圖 a-g 分別代表軸位T2WI、IVIM DWI(b = 1200s / mm2)、標(biāo)準(zhǔn) ADC、D、D *、f 偽彩圖及病理組織切片圖(×100 倍)。IVIM 各參數(shù)值如下:ADC = 0.000992 mm2/ s;D = 0.000437 mm2/ s;D * = 0.0338mm2/ s;f =0.215。Fig.2 a-g, axisal T2WI, axial IVIM DWI (b=1200s/mm2), standardADC, D, D*, f images and HEhistological section (×100), respectively.Ahistopathologically proved metastatic lymph node(white arrow) was located on the right side of the tumor, with short-axis diameter of 4.0 mm,standardADC=0.000992 mm2/s, D=0.000437 mm2/s, D*=0.0338 mm2/s, f=0.215.
【學(xué)位授予單位】:重慶醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2018
【分類號(hào)】:R445.2;R735.37
本文編號(hào):2677179
【圖文】:
圖 1:一短徑為 3.4 mm 的非轉(zhuǎn)移性淋巴結(jié)(白色箭頭),位于腫瘤左側(cè)。圖 a-g 分別代表軸位T2WI、IVIM DWI(b = 1200s / mm2)、標(biāo)準(zhǔn) ADC、D、D *、f 偽彩圖及病理組織切片圖(×100 倍)。IVIM 各參數(shù)值如下:ADC = 0.00107 mm2/ s;D = 0.000694 mm2/ s;D * = 0.00397 mm2/ s;f = 0.465。Fig.1 Ahistopathologically proved nonmetastatic lymph node (white arrow) was located on the leftside of the tumor, with short-axis diameter of 3.4 mm.a-g, axisal T2WI, axial IVIM DWI(b=1200s/mm2), standard ADC, D, D*, f images and HE histological section (×100), respectively.standardADC=0.00107 mm2/s, D=0.000694 mm2/s, D*=0.00397 mm2/s, f=0.465.
圖 2:一短徑為 4.0mm 的非轉(zhuǎn)移性淋巴結(jié)(白色箭頭),位于腫瘤右側(cè)。圖 a-g 分別代表軸位T2WI、IVIM DWI(b = 1200s / mm2)、標(biāo)準(zhǔn) ADC、D、D *、f 偽彩圖及病理組織切片圖(×100 倍)。IVIM 各參數(shù)值如下:ADC = 0.000992 mm2/ s;D = 0.000437 mm2/ s;D * = 0.0338mm2/ s;f =0.215。Fig.2 a-g, axisal T2WI, axial IVIM DWI (b=1200s/mm2), standardADC, D, D*, f images and HEhistological section (×100), respectively.Ahistopathologically proved metastatic lymph node(white arrow) was located on the right side of the tumor, with short-axis diameter of 4.0 mm,standardADC=0.000992 mm2/s, D=0.000437 mm2/s, D*=0.0338 mm2/s, f=0.215.
【學(xué)位授予單位】:重慶醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2018
【分類號(hào)】:R445.2;R735.37
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