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Correlation between physical measurements and observer evaluations of image quality in digital chest radiography.

Abstract：

PURPOSE:The aim of this paper was to investigate the relationship between the physical and subjective (observer) image quality metrics in digital chest radiography. METHODS:Five digital radiography systems, four with indirect flat panel detector and one with storage phosphor-based computed radiography system, were used in the study. The physical image quality assessments were carried out using effective detective quantum efficiency (eDQE) metric and subjective performance of the digital radiography systems was evaluated in terms of inverse image quality figure (IQFinv ) derived from the contrast-detail (CD) diagrams using CDRAD 2.0 phantom and CDRAD phantom analyzer software. All measurements were performed for different tube voltages (70, 81, 90, 102, 110, and 125 kVp) and polymethyl methacrylate (PMMA) phantom thicknesses. An anthropomorphic chest phantom and visual grading analysis (VGA) technique based on European image quality criteria for chest radiography were used for clinical image quality evaluation. RESULTS:The Spearman correlation coefficients were calculated for the investigation of the correlation between physical image quality and clinical image quality. The results showed strong positive correlation between the physical and clinical image quality findings. The minimum correlation coefficient was 0.91 (p < 0.011) for IQFinv vs VGA scores and 0.92 (p < 0.009) for IeDQE vs VGA scores. CONCLUSIONS:Our results confirm that clinical image quality can be predicted with both physical assessments and contrast-detail detectability studies.

journal_name

Med Phys

journal_title

Medical physics

authors

Yalcin A,Olgar T,Sancak T,Atac GK,Akyar S

doi

10.1002/mp.14244

subject

Has Abstract

pub_date

2020-09-01 00:00:00

pages

3935-3944

issue

9

eissn

0094-2405

issn

2473-4209

journal_volume

47

pub_type

杂志文章

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