The effect of a pre-reconstruction process in a filtered back projection reconstruction on an image quality of a low tube voltage computed tomography

被引：0
|
作者：
Takemitsu, Masaki [1 ]
Kudomi, Shohei [1 ]
Takegami, Kazuki [1 ]
Uehara, Takuya [1 ]
机构：
[1] Yamaguchi Univ, Dept Radiol Technol, Yamaguchi 7558505, Japan
来源：
RADIOLOGICAL PHYSICS AND TECHNOLOGY | 2024年 / 17卷 / 01期
关键词：
Computed tomography; Filtered back projection reconstruction; Low tube voltage CT; CT ANGIOGRAPHY; NOISE; RESOLUTION; MULTISLICE; REDUCTION;
D O I：
10.1007/s12194-023-00764-9
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
This study aims to evaluate the effect of pre-reconstruction process for low tube voltage computed tomography (CT) on image quality of filtered back projection (FBP) reconstruction. Small and large quality assurance water phantoms (19 and 33 cm diameter) were scanned on a third-generation dual-source CT with 70 kVp and 120 kVp at various dose levels. Image quality was assessed in terms of the noise power spectrum (NPS) and task-based transfer function (TTF). NPSs and TTFs in the small phantom were comparable between 70 and 120 kVp protocols. In the large phantom, the curves of the NPS changed and the TTF decreased even at the high-dose levels for 70 kVp protocol compared to 120 kVp protocol. Our results indicated that the pre-reconstruction process is performed in low tube voltage CT for large objects even for the FBP reconstruction and has an effect on the image quality.
引用
收藏
页码：306 / 314
页数：9
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