Correlation between Basic Imaging Properties and Subjective Evaluations of Two Digital Radiographic X-ray Systems Based on Direct-Conversion Flat Panel Detector
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- Sakaguchi Taro
- Center for Diagnostic Imaging, Kurume University Hospital
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- Katayama Reiji
- Center for Diagnostic Imaging, Kurume University Hospital
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- Morishita Junji
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University
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- Sakai Shinji
- Center for Diagnostic Imaging, Kurume University Hospital
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- Kuroki Hidefumi
- Center for Diagnostic Imaging, Kurume University Hospital
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- Ohkubo Seiji
- Center for Diagnostic Imaging, Kurume University Hospital
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- Maeda Takashi
- Center for Diagnostic Imaging, Kurume University Hospital
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- Hayabuchi Naofumi
- Department of Radiology, Kurume University School of Medicine
Bibliographic Information
- Other Title
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- 直接変換型FPDを搭載したディジタルX線透視撮影システムの画質特性と視覚評価の対応
- チョクセツ ヘンカンガタ FPD オ トウサイ シタ ディジタル Xセン トウシ サツエイ システム ノ ガシツ トクセイ ト シカク ヒョウカ ノ タイオウ
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Abstract
The purpose of this study was to examine the correlation between the basic imaging properties of two digital radiographic X-ray systems with a direct conversion flat-panel detector and their image qualities, which were evaluated by the observer in hard copy and soft copy studies. The subjective image quality was evaluated and compared in terms of the low-contrast detectability and image sharpness in the two digital radiographic X-ray systems. We applied the radiographs of a contrast detail phantom to the evaluation of low-contrast detectability and analyzed the contrast detail diagrams. Finally, low-contrast detectability was evaluated by the image quality figure (IQF) calculated from the contrast detail diagrams. Also, the subjective image sharpness of human dry bones of two systems was examined and evaluated by the normalized-rank method. The results indicated that System A tended to provide superior subjective image quality compared to System B in both observer studies. We also found high correlations between IQFs and basic imaging properties, such as the noise power spectrum (NPS) and the noise equivalent quantum (NEQ). In conclusion, the low-contrast detectability of the two digital radiographic X-ray systems with a direct conversion flat-panel detector corresponded to the NPS and the NEQ in both outputs (soft copy and hard copy). On the other hand, the subjective image sharpness of human dry bones was affected by their noise properties.
Journal
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- Japanese Journal of Radiological Technology
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Japanese Journal of Radiological Technology 66 (11), 1457-1466, 2010
Japanese Society of Radiological Technology
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Details 詳細情報について
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- CRID
- 1390282681339900928
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- NII Article ID
- 10026964891
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- NII Book ID
- AN00197784
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- ISSN
- 18814883
- 03694305
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- NDL BIB ID
- 10921719
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed