Usefulness of standard deviation on the histogram of ultrasound as a quantitative value for hepatic parenchymal echo texture; Preliminary study
Usefulness of standard deviation on the histogram of ultrasound as a quantitative value for hepatic parenchymal echo texture; Preliminary study
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DOI：
10.1016/j.ultrasmedbio.2006.06.014
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发表时间：
2006-12-01
影响因子：
2.9
通讯作者：
Park, Cheol Min
中科院分区：
文献类型：
--
作者：
Lee, Chang Hee;Choi, Jae Woong;Park, Cheol Min
本研究探讨了超声图像存档和通信系统（PACS）视图中测量的直方图上的标准差（SD）值是否可以用作确定肝实质回声均匀性或异质性的指标。患者（n = 202）接受了腹部超声检查。一个US单元与凸形（3至5 MHz）换能器一起使用。在肝脏的四个不同的感兴趣区域（ROI）中测量肝实质的回声，避免所有血管、胆管和钙化。在PACS视图中的ROI直方图上自动计算SD。肝脏回声类型分为正常、脂肪肝（FL）和慢性肝病（CLD）。检查从这三组的ROI直方图计算的SD的分布，并使用单因素方差分析对三组的平均SD进行多重比较的统计分析。在202名患者中，有72名正常患者（平均SD：11.10 +/- 0.91），66名FL患者（平均SD：11.09 +/- 1.04）和64名CLD患者（平均SD：14.21 +/- 2.32）。正常组与FL组SD值相似（p > 0.05），CLD组与正常组、CLD组与FL组间SD值差异有显著性（p < 0.0001）。腹部US检查的SD值（根据PACS视图的感兴趣区域直方图计算）被认为反映了肝实质的同质性或异质性。较小的SD值被认为代表正常或FL条件，较大的SD值反映了显示粗回声的CLD的可能性。因此，可以得出结论，SD可以作为一个有用的定量值，可以确定CLD的粗糙度。
This study examined whether the standard deviation (SD) values on the histogram measured in the picture archiving and communication system (PACS) views of an ultrasound (US) can be used as an index to determine the homogeneity or heterogeneity of a hepatic parenchymal echo. Patients (n = 202) underwent an abdominal US examination. One US unit was used with a convex (3 to 5 MHz) transducer. The echogenicity of the hepatic parenchyma was measured in four different regions-of-interest (ROIs) of the liver with all vessels, bile ducts and calcification being avoided. The SDs were calculated automatically on the histogram of the ROI in the PACS views. The echo patterns of the liver were classified into normal, fatty liver (FL) and chronic liver disease (CLD). The distribution of the SD calculated from the ROI histogram of these three groups was examined, and statistical analysis for multiple comparisons of the average SD of the three groups was carried out using one-way analysis of variance. Among the 202 patients, there were 72 normal patients (mean SD: 11.10 +/- 0.91), 66 with a FL (mean SD: 11.09 +/- 1.04) and 64 with CLD (mean SD: 14.21 +/- 2.32). The SD values of the normal and FL groups were similar (p > 0.05), but there were significant differences (p < 0.0001) between the CLD and normal groups, and between the CLD and FL groups. The SD values of the abdominal US examination, which had been calculated on the ROI histogram of the PACS view, are believed to reflect the homogeneity or heterogeneity of the hepatic parenchyma. Smaller SD values are thought to represent normal or FL conditions, and larger SD values reflect the possibility of CLD that shows coarse echo. Therefore, it is concluded that the SD can be used as a useful quantitative value that can determine the coarseness of CLD.