Application value of 1 024×1 024 reconstruction matrix combined with iterative reconstruction algorithm in CT angiography of the deep inferior epigastric artery
10.3969/j.issn.1002-1671.2024.11.032
- VernacularTitle:1 024×1 024重建矩阵结合迭代重建算法在腹壁下动脉CT血管成像中的应用价值
- Author:
Mengting HU
1
;
Lei LIU
;
Shigeng WANG
;
Xiaoyu TONG
;
Yong FAN
;
Jingyi ZHANG
;
Qiye CHENG
;
Anliang CHEN
;
Yijun LIU
Author Information
1. 大连医科大学附属第一医院放射科,辽宁 大连 116011
- Keywords:
deep inferior epigastric artery;
computed tomography angiography;
reconstruction matrix;
iterative reconstruction algorithm
- From:
Journal of Practical Radiology
2024;40(11):1897-1900,1936
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the application value of 1 024×1 024 reconstruction matrix combined with iterative reconstruc-tion algorithm(Karl)in deep inferior epigastric artery(DIEA)computed tomography angiography(CTA).Methods A total of 40 patients who underwent DIEA CTA were prospectively selected and the original data were reconstructed by grouping.Group A was reconstructed using a conventional 512×512 matrix combined with Karl 5 grade.Group B was reconstructed using 1 024×1 024 recon-struction matrix combined with Karl 5,7,and 9 grades,respectively,and 3 subgroups B1-B3 were obtained.The CT and standard devia-tion(SD)values of the external iliac artery and psoas major muscle were measured on axial images,and signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)were calculated.A 3-point scale was used to evaluate the perforating vessels from the DIEA,intramuscular course,point of emergence,superficial inferior epigastric artery(SIEA)and superficial inferior epigastric vein(SIEV)on volume ren-dering(VR)and maximum intensity projection(MIP)images by two observers,and a 5-point scale was used to evaluate the overall image quality on axial images.Results With the increase of Karl grade in groups B1 to B3,the SD value of the external iliac artery decreased gradually(P＜0.05),while SNR and CNR increased gradually(P＜0.05).The SD values of the external iliac artery in group B2 and group B3 were lower than those in group A(P＜0.05),and SNR and CNR were higher than those in group A(P＜0.05).There was a good consistency in the subjective evaluation between the two observers(Kappa values=0.773-0.872,P＜0.05).The perforating vessels from the DIEA,intramuscular course,point of emergence,SIEA and SIEV display and overall image quality subjective scores of group B2 and group B3 were better than those of group A(P＜0.05),and the scores of group B2 showed the greatest improvement.Conclusion The 1 024 × 1 024 reconstruction matrix combined with the Karl 7 reconstruction algorithm can optimize the image quality and improve the display of the DIEA and perforator microvessels.
