Application of Auto-Prescription Technique in CT Portal Venography and Liver Volume Measurement
10.3969/j.issn.1005-5185.2025.09.018
- VernacularTitle:自动预置技术在CT门静脉成像及肝脏体积测量中的应用
- Author:
Yong FAN
1
;
Xin FANG
1
;
Yijun LIU
1
;
Beibei LI
1
;
Shigeng WANG
1
;
Anliang CHEN
1
Author Information
1. 大连医科大学附属第一医院放射科,辽宁 大连 116011
- Publication Type:Journal Article
- Keywords:
Portal vein;
Tomography,X-ray computed;
Imaging,three-dimensional;
Liver volume;
Radiation dose
- From:
Chinese Journal of Medical Imaging
2025;33(9):1009-1014
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To explore the application value of auto-prescription technique in CT portal venography and liver volume measurement.Materials and Methods A total of 180 patients who underwent contrast-enhanced abdominal CT in the First Affiliated Hospital of Dalian Medical University from April to November 2022 were prospectively collected and randomly divided into two groups,with 90 cases in each group.Group A(experimental group)was scanned with auto-prescription technique.Group B(conventional group)was scanned with 120 kVp,and the other imaging parameters kept the same as group A.In group A,the correlation between body mass index and tube voltage(kVp)recommended by auto-prescription technique was analyzed.The following values were compared between group A and group B,including the volume CT dose index,dose length product,CT value of portal vein and liver,standard deviation,contrast-to-noise ratio(CNR),image quality and subjective score of automatic segmentation.The liver volumes of group A and B were measured by Liver Segmentation software.The volumes measured by automatic segmentation software(Vsoft)were recorded,and then were compared with those segmented manually(gold standard)(Vstnd).Results Compared with group B,the volume CT dose index and dose length product in group A decreased by 22%and 25%(t=-4.654,-5.403,both P<0.05),respectively.The CT value and CNR of portal vein and liver in group A were higher than those in group B(t=4.857-6.011,all P<0.05).There was no significant difference in standard deviation,Vstnd and Vsoft between group A and group B(P>0.05).The consistency of subjective scores between the two observers was good(ICC=0.773-0.856,all P<0.05).The subjective scores of two-dimensional and three-dimensional images,as well as the automatic software segmentation scores in group A were higher than those in group B(Z=897.500,1 287.500,912.721,all P<0.05).The recommended kVp value in group A was positively correlated with body mass index(r=0.674,P<0.001).Conclusion The application of auto-prescription technique in CT portal venography can ensure the image quality,measure the liver volume accurately,and reduce the patient's radiation dose individually.
