iQMetrix-CT: New software for task-based image quality assessment of phantom CT images

被引：27

作者：

Greffier, Joel ^{[1
]}

Barbotteau, Yves ^{[2
]}

Gardavaud, Francois ^{[3
,4
]}

机构：

[1] Montpellier Univ, Nimes Univ Hosp, Dept Med Imaging, IMAGINE UR 103, F-30029 Nimes, France

[2] Ramsay Sante, CHP Clairval, Dept Radiol, F-13273 Marseille, France

[3] APHP, Hop Tenon, Dept Radiol, F-75020 Paris, France

[4] Sorbonne Univ, Inst Comp & Data Sci ISCD, F-75013 Paris, France

来源：

DIAGNOSTIC AND INTERVENTIONAL IMAGING | 2022年 / 103卷 / 11期

关键词：

Image quality; Computer -assisted image analysis; Multidetector computed tomography; Task -based image quality assessment; Software; ITERATIVE RECONSTRUCTION ALGORITHM; DOSE REDUCTION; CHEST CT; MODEL; PERFORMANCE; DETECTABILITY; OPTIMIZATION; SYSTEM; IMPACT; PROTOCOLS;

D O I：

10.1016/j.diii.2022.05.007

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：

The purpose of this article was to explain how the new iQMetrix-CT software works, as well as to describe its current potential and discuss its future applications. iQMetrix-CT was developed by a working group from the French Society of Medical Physicists (SFPM). This software calculates three advanced metrics, which have been adapted to take into account the non-linear and non-stationary properties of iterative reconstruction algorithms. Noise power spectrum is calculated to assess noise texture and noise magnitude in the frequency domain. The task-based transfer function is computed to assess the spatial resolution under conditions of contrast and noise similar to the lesions encountered in clinical practice. Finally, the detectability index is used to estimate the radiologist's ability to perform a given task such as detecting a simulated lesion. These metrics are very useful to evaluate the performance of reconstruction algorithms in term of image quality and optimize the doses of a given protocol or to evaluate and compare a new technology.(c) 2022 Published by Elsevier Masson SAS on behalf of Societe francaise de radiologie.

引用

页码：555 / 562

页数：8

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