机构地区:[1]郑州大学附属肿瘤医院,河南省肿瘤医院放射科,450008
出 处:《临床放射学杂志》2015年第12期1929-1934,共6页Journal of Clinical Radiology
摘 要:目的初步探讨直肠癌体素内不一致运动磁共振成像(IVIM—MRI)序列的成像特点,进一步研究探讨IVIM参数标准ADC、真实扩散系数(D)、灌注相关扩散系数(D^*)、灌注分数(f)及表观扩散系数(ADC)值对直肠癌术前病理分级的评估价值。方法分析30例经手术病理证实为直肠癌患者的IVIM参数标准ADC、D、D^*、f值及DWI资料,结合病理结果,分析在肿瘤不同分化程度、T分期及N分期中的区别。结果D在直肠癌分化程度组、T分期组的差异有统计学意义(F值分别为3.700、12.846;P〈0.05),ADC值在直肠癌分化程度组、T分期组的差异有统计学意义(F值分别为3.823、7.881;P〈0.05),两者在N分期组中差异均无统计学意义(F值分别为0.510、0.214;P〉0.05)。多重比较显示肿瘤分化程度组的高一中分化组与中分化组[95%可信区间(*104):0.358~4.608,P=0.018]、中一低分化组[95%可信区间(*104):0.1578~4.819,P=0.033]的D值差异有统计学意义(P〈0.05),肿瘤分化程度组的高一中分化组与中分化组[95%可信区间(*104):4.968—52.34,P=0.013]、中一低分化组[95%可信区间(*104):1.73~53.689,P=0.033]的ADC值差异有统计学意义(P〈0.05);肿瘤T分期中T1期与其他三期之间的D值[95%可信区间(*104)分别为:1.167~5.135、1.868~5.872、2.358~6.362]差异有统计学意义(P〈0.05),肿瘤T分期中T1期与其他三期之间的ADC值[95%可信区间(*104)分别为:15.945~66.615、17.09~68.227、17.562~68.698]差异有统计学意义(P〈0.05),T2期与T4期之间的D值差异有统计学意义[95%可信区间(*104):0.032-2.386,P〈0.05]。各参数在N0期~N2期之问差异均无统计学意义(P〉0.05)。结论D及ADC值可在一定程度上反映直肠癌的病理分级Objective To investigate intravoxel incoherent motion MR imaging (IVIM) features of rectal cancer, and the values of IVIM parameters including standard ADC, pure molecular diffusion coefficient (D) , perfusion-related diffu- sion coefficient (D * ) , perfusion fraction (f) , and DWI parameter including apparent diffusion coefficient (ADC)in the preoperative staging of rectal cancer. Methods Standard ADC, D, D* and f, ADC in 30 patients with rectal cancer con- firmed by surgical pathology were analyzed, and compared with the pathological resuhs. The IVIM parameters and ADC value were compared between histologic differentiated grades, T-stage, as well as the difference in N-stage. Results The differences of D between the differentiated grades and T-stage were statistically significant (F = 3. 700,12. 846;P 〈 0.05 ) , The differences of ADC between the differentiated grades and T-stage were statistically significant ( F = 3. 823,7. 881 ;P 〈 0.05 ), and no significant difference between the N-Stage (F = 0. 510,0. 214 ;P 〉 0.05 ). Tukey's post hoc test showed that the differences of D between good-moderate differentiated(95% Confidence Interval( * 104 ) :0. 358 ~ 4. 608,P = 0.018 ) and moderate-poor differentiated group(95% Confidence Interval( * 104) :0. 1578 - 4. 819 ,P = 0. 033 ) were significant ( P 〈 0.05). Tukey's post hoc test showed that the differences of ADC between good-moderate differentiated(95% Confidence Interval ( * 104 ) :4. 968 - 52.34, P = 0.013 ) and moderate-poor differentiated group ( 95 % Confidence Interval ( * 104 ) : 1.73 ~ 53. 689, P = 0. 033 )were significant (P 〈 0.05 ). The differences of D(95% Confidence Interval( * 104) :1. 1675. 135,1. 868 - 5. 872,2. 358 - 6. 362) between the stage T1 rectal cancer and stage T2 - 4 rectal cancer were statistically significant (P 〈 0.05 ). The differences of ADC (95% Confidence Interval ( * 104 ) : 15. 945 - 66. 615,17.
关 键 词:直肠癌 体素内不一致运动序列 表观扩散系数
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