Comparison of maximum slope and deconvolution algorithms in multi-slice CT hepatic perfusion measurement
10.3760/cma.j.issn.1005-1201.2016.07.012
- VernacularTitle:肝脏CT灌注成像中不同算法对灌注参数的影响
- Author:
Kehua PAN
;
Guoquan CAO
;
Houzhang SUN
;
Aimin WANG
;
Xianzhong GUO
;
Xiufen JIA
- Publication Type:Journal Article
- Keywords:
Liver;
Tomography,X-ray computed;
Comparative study
- From:
Chinese Journal of Radiology
2016;50(7):537-541
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the reliability of CT perfusion parameter values of the normal hepatic segments and neoplasms, obtained with deconvolution (DC) and maximum slope (MS) algorithms. Methods Perfusion parameter values of 111 ROIs in 62 normal hepatic segments and 49 neoplasms derived from 62 CT perfusion studies performed with 320 multi-slice CT, were retrospectively analyzed by two experienced radiologists. BF,BV and PI according to DC and MS algorithms were compared with t paired test, Pearson correlation and Bland-Altman agreement analysis. Interobserver agreement for all perfusion parameters was calculated using intraclass correlation coefficients (ICC). Results Interobserver agreement measured with ICC was very good for all perfusion parameters (≥0.95). BFdc and BVdc exceeded the BFms and BVms in normal hepatic segments and neoplasms (P<0.05); PIdc significantly exceeded the PIms in normal hepatic segments(P<0.05) ,while no difference were found in hepatic neoplasms(P>0.05). Both pairs of perfusion measurements significantly correlated with each other(r>0.9, P<0.01),but the agreement of BF, BV and PI according to DC and MS algorithms was not good. Conclusions CT perfusion values such as BF,BV and PI obtained by DC and MS algorithms correlated significantly with each other, but with poor agreement.
