Chest computed tomography using iterative reconstruction vs filtered back projection (Part 1): evaluation of image noise reduction in 32 patients

被引：149

作者：

Pontana, Francois ^{[2
]}

Pagniez, Julien ^{[2
]}

Flohr, Thomas ^{[3
]}

Faivre, Jean-Baptiste ^{[2
]}

Duhamel, Alain ^{[4
]}

Remy, Jacques ^{[2
]}

Remy-Jardin, Martine ^{[1
,2
]}

机构：

[1] Hosp Calmette, Dept Thorac Imaging, F-59037 Lille, France

[2] Univ Lille Nord France, Dept Thorac Imaging, Hosp Calmette, EA 2694, F-59000 Lille, France

[3] Siemens HealthCare, Computed Tomog Div, D-91301 Forchheim, Germany

[4] Univ Lille Nord France, Dept Med Stat, F-59000 Lille, France

来源：

EUROPEAN RADIOLOGY | 2011年 / 21卷 / 03期

关键词：

Radiation dose; CT; Chest; Iterative reconstruction; Image quality; HIGH-RESOLUTION CT; RADIATION-DOSE REDUCTION; DIFFUSE LUNG-DISEASE; HELICAL CT; SECTIONS; QUALITY;

D O I：

10.1007/s00330-010-1990-5

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：

To assess noise reduction achievable with an iterative reconstruction algorithm. 32 consecutive chest CT angiograms were reconstructed with regular filtered back projection (FBP) (Group 1) and an iterative reconstruction technique (IRIS) with 3 (Group 2a) and 5 (Group 2b) iterations. Objective image noise was significantly reduced in Group 2a and Group 2b compared with FBP (p < 0.0001). There was a significant reduction in the level of subjective image noise in Group 2a compared with Group 1 images (p < 0.003), further reinforced on Group 2b images (Group 2b vs Group 1; p < 0.0001) (Group 2b vs Group 2a; p = 0.0006). The overall image quality scores significantly improved on Group 2a images compared with Group 1 images (p = 0.0081) and on Group 2b images compared with Group 2a images (p < 0.0001). Comparative analysis of individual CT features of mild lung infiltration showed improved conspicuity of ground glass attenuation (p < 0.0001), ill-defined micronodules (p = 0.0351) and emphysematous lesions (p < 0.0001) on Group 2a images, further improved on Group 2b images for ground glass attenuation (p < 0.0001), and emphysematous lesions (p = 0.0087). Compared with regular FBP, iterative reconstructions enable significant reduction of image noise without loss of diagnostic information, thus having the potential to decrease radiation dose during chest CT examinations.

引用

页码：627 / 635

页数：9

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