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中华医学超声杂志(电子版) ›› 2023, Vol. 20 ›› Issue (09) : 916 -922. doi: 10.3877/cma.j.issn.1672-6448.2023.09.005

高帧频超声影像学

肾透明细胞癌高帧频超声造影时间-强度曲线特征分析
张卫平, 王婧玲, 刘志兴, 陈莉(), 谌芳群   
  1. 330006 南昌,南昌大学第一附属医院超声科
  • 收稿日期:2023-06-05 出版日期:2023-09-01
  • 通信作者: 陈莉
  • 基金资助:
    江西省科技厅重点研发计划一般项目(20203BBGL73196); 江西省卫生健康委员会科技计划项目(202210452); 江西省中医药管理局科技计划项目(2021A060)

Characteristics of time-intensity curve of high-frame-rate contrast-enhanced ultrasound in clear cell renal cell carcinoma

Weiping Zhang, Jingling Wang, Zhixing Liu, Li Chen(), Fangqun Chen   

  1. Department of Ultrasound, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
  • Received:2023-06-05 Published:2023-09-01
  • Corresponding author: Li Chen
引用本文:

张卫平, 王婧玲, 刘志兴, 陈莉, 谌芳群. 肾透明细胞癌高帧频超声造影时间-强度曲线特征分析[J]. 中华医学超声杂志(电子版), 2023, 20(09): 916-922.

Weiping Zhang, Jingling Wang, Zhixing Liu, Li Chen, Fangqun Chen. Characteristics of time-intensity curve of high-frame-rate contrast-enhanced ultrasound in clear cell renal cell carcinoma[J]. Chinese Journal of Medical Ultrasound (Electronic Edition), 2023, 20(09): 916-922.

目的

探讨肾透明细胞癌(CCRCC)高帧频超声造影(H-CEUS)时间-强度曲线(TIC)特征及其临床应用价值。

方法

选取2022年6月至2023年1月在南昌大学第一附属医院行常规超声造影(C-CEUS)及H-CEUS检查并经手术后病理确诊的CCRCC患者21例。回顾性分析C-CEUS及H-CEUS的TIC曲线特点,获得TIC参数,包括拟合程度(GOF)、基本强度(BI)、始增时间(AT)、达峰时间(TTP)、峰值强度(PI)、上升斜率(AS)、峰值强度减半时间(DT/2)、曲线下降斜率(DS)、曲线下面积(AUC)、平均渡越时间(MTT)。采用配对t检验比较2种超声造影模式下病灶与正常肾皮质的TIC参数差异;并用公式ΔPI=(病灶PI-正常肾皮质PI)/正常肾皮质PI进行校正,以此类推,分别对BI、AT、TTP、AS、DT/2、DS、AUC、MTT进行校正。采用配对Wilcoxon signed-rank检验对H-CEUS及C-CEUS校正后的TIC参数进行比较。

结果

C-CEUS造影模式中病灶TIC参数PI、DS大于正常肾皮质[(49.93±6.02)dB vs(44.12±7.55)dB;0.24±0.14 vs 0.22±0.12],DT/2、MTT小于正常肾皮质[(140.38±26.51)s vs(150.98±29.27)s;(130.95±26.54)s vs(142.03±29.72)s],差异均具有统计学意义(t=5.300、-3.404、-4.139、-4.095,P<0.001、=0.003、=0.001、=0.001),参数GOF、BI、AT、TTP、AS、AUC差异均无统计学意义(P均>0.05)。H-CEUS造影模式中病灶TIC参数AT、TTP、AS、AUC均小于正常肾皮质[(9.41±2.73)s vs(10.40±3.03)s;(27.17±6.17)s vs(30.13±6.66)s;0.94±0.36 vs 1.07±0.39,3064.47±844.52 vs 3378.62±993.54],PI大于正常肾皮质[(43.34±8.69)dB vs(40.30±7.05)dB],差异均具有统计学意义(t=-3.465、-2.499、-2.688、-2.220、2.211,P=0.002、0.021、0.014、0.038、0.039),参数GOF、BI、DT/2、DS、MTT值差异无统计学意义(P均>0.05)。H-CEUS与C-CEUS校正后的TIC参数比较,H-CEUS的参数ΔAT、ΔAS、ΔAUC均小于C-CEUS[-0.072(-0.180,-0.022) vs -0.025(-0.054,0.053),-0.089(-0.190,0.083)vs 0.034(-0.016,0.074),-0.097(-0.256,-0.004)vs -0.045(-0.079,0.266)],差异具有统计学意义(Z=-2.242,-2.520,-2.033,P=0.025、0.012、0.042),ΔBI、ΔTTP、ΔPI、ΔDT/2、ΔDS、ΔMTT差异无统计学意义(P均>0.05)。CCRCC的H-CEUS TIC曲线形态呈弓背向上的弧形,上升支陡直,与正常肾皮质曲线的间距较大,消退较慢。

结论

CCRCC的H-CEUS TIC曲线形态有一定特征,其灌注期参数ΔAT短于C-CEUS、ΔAS绝对值高于C-CEUS,可为临床进一步分析灌注期造影特征提供依据。

Objective

To investigate the characteristics and clinical application of the time-intensity curve (TIC) of high-frame-rate contrast-enhanced ultrasound (H-CEUS) in clear cell renal cell carcinoma (CCRCC).

Methods

A total of 21 patients with CCRCC who underwent conventional contrast-enhanced ultrasound (C-CEUS) and H-CEUS examinations were selected at the First Affiliated Hospital of Nanchang University. TIC parameters of C-CEUS and H-CEUS were acquired and analyzed retrospectively, such as goodness of fit (GOF), base intensity (BI), arrival time (AT), time to peak (TTP), peak intensity (PI), ascending slope (AS), time to half peak intensity (DT/2), descending slope (DS), area under curve (AUC), and mean transit time (MTT). The paired t test was used to compare the TIC parameters of C-CEUS and H-CEUS between the lesions and the normal renal cortex. The equation ΔPI=(focal PI-normal renal cortex PI)/normal renal cortex PI was used for correction of BI, AT, TTP, AS, DT/2, DS, AUC, and MTT. Corrected TIC parameters of H-CEUS and C-CEUS were compared by the paired Wilcoxon signed-rank test.

Results

The C-CEUS TIC parameters PI and DS of the lesions were significantly higher than those of the normal renal cortex [(49.93±6.02) dB vs (44.12±7.55) dB, t=5.300, P<0.001; 0.24±0.14 vs 0.22±0.12, t=-3.404, P=0.003], while DT/2 and MTT of the lesions were significantly smaller than those of the normal renal cortex [(140.38±26.51) s vs (150.98±29.27) s, t=-4.139, P=0.001; (130.95±26.54) s vs (142.03±29.72) s, t=-4.095, P=0.001]. There were no significant differences in GOF, BI, AT, TTP, AS, or AUC between the lesions and the normal renal cortex (P>0.05 for all). The H-CEUS TIC parameters AT, TTP, AS, and AUC of the lesions were significantly lower than those of the normal renal cortex [(9.41±2.73) s vs (10.40±3.03) s, t=-3.465, P=0.002; (27.17±6.17) s vs (30.13±6.66) s, t=-2.499, P=0.021; 0.94±0.36 vs 1.07±0.39, t=-2.688, P=0.014; 3064.47±844.52 vs 3378.62±993.54, t=-2.220, P=0.038], PI of the lesions was significantly greater than that of the normal renal cortex [(43.34±8.69) dB vs (40.30±7.05) dB, t=2.211, 0.039], while there was no statistically significant difference in GOF, BI, DT/2, DS, or MTT between the lesions and the normal renal cortex (P>0.05 for all). Comparing the corrected TIC parameters of H-CEUS with C-CEUS, ΔAT, ΔAS and ΔAUC of H-CEUS were significantly smaller than those of C-CEUS [-0.072 (-0.180, -0.022) vs -0.025 (-0.054, 0.053), Z=-2.242, P=0.025; -0.089 (-0.190, 0.083) vs 0.034 (-0.016, 0.074), Z=-2.520, P=0.012; -0.097 (-0.256, -0.004) vs -0.045 (-0.079, 0.266), Z=-2.033, P=0.042], while there were no significant differences in ΔBI, ΔTTP, ΔPI, ΔDT/2, ΔDS, or ΔMTT (P>0.05 for all). The TIC of H-CEUS of CCRCC was arching upward with a steep ascending branch and regressed slowly, and the distance between the TIC of the lesions and normal renal cortex was large.

Conclusion

The TIC of H-CEUS of CCRCC has certain characteristics. The perfusion period parameter ΔAT of H-CEUS is shorter than that of C-CEUS, but the absolute value of ΔAS is higher, which provides a basis for further analysis of contrast characteristics of the perfusion stage contrast features.

图1 44岁男性患者,左肾透明细胞癌常规超声、超声造影及病理图像。图a:常规超声见左肾上极低回声团,大小4.51 cm×4.42 cm,边界清晰,形态规则(箭头示病灶);图b:肿块内见点状血流信号,血流分级Ⅰ级(箭头示病灶);图c、d:病理诊断为肾透明细胞癌,世界卫生组织/国际泌尿病理学会分级为2级,镜下肿瘤细胞呈巢状分布,细胞核呈小圆形,胞浆空亮,期间见薄壁血管分布(HE×100);图e:常规超声造影(C-CEUS)灌注期23 s呈均匀性高增强(箭头示病灶);图f:C-CEUS时间-强度曲线(TIC)呈弓背向上的弧形,与正常肾皮质曲线的间距较小,消退较快(红色曲线为病灶,黄色曲线为正常肾皮质);图g:高帧频超声造影(H-CEUS)灌注期23 s呈均匀性高增强(箭头示病灶);图h:H-CEUS TIC呈弓背向上的弧形,上升支陡直,与正常肾皮质曲线的间距较大,消退较慢(红色曲线为病灶,黄色曲线为正常肾皮质)
表1 21例肾透明细胞癌患者常规超声造影时间-强度曲线参数比较(
表2 21例肾透明细胞癌患者高帧频超声造影时间-强度曲线参数比较(
表3 21例肾透明细胞癌患者C-CEUS与H-CEUS时间-强度曲线校正后的参数比较[MQR)]
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