| Development of pulmonary blood flow evaluation method with a dynamic flat-panel detector: quantitative correlation analysis with findings on perfusion scan. | |
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MedLine Citation:
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PMID: 20821100 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Pulmonary blood flow is reflected in dynamic chest radiographs as changes in X-ray translucency, i.e., pixel values. Thus, decreased blood flow should be observed as a reduction of the variation of X-ray translucency. We performed the present study to investigate the feasibility of pulmonary blood flow evaluation with a dynamic flat-panel detector (FPD). Sequential chest radiographs of 14 subjects were obtained with a dynamic FPD system. The changes in pixel value in each local area were measured and mapped on the original image by use of a gray scale in which small and large changes were shown in white and black, respectively. The resulting images were compared to the findings in perfusion scans. The cross-correlation coefficients of the changes in pixel value and radioactivity counts in each local area were also computed. In all patients, pulmonary blood flow disorder was indicated as a reduction of changes in pixel values on the mapping image, and a correlation was observed between the distribution of changes in pixel value and those in radioactivity counts (0.7 <or= r, 3 cases; 0.4 <or= r < 0.7, 7 cases; 0.2 <or= r < 0.4, 4 cases). The results indicated that the distribution of changes in pixel value could provide a relative measure related to pulmonary blood flow. The present method is potentially useful for evaluating pulmonary blood flow as an additional examination in conventional chest radiography. |
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Authors:
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Rie Tanaka; Shigeru Sanada; Masaki Fujimura; Masahide Yasui; Norio Hayashi; Shiro Tsuji; Hiroyuki Okamoto; Yuko Nanbu; Osamu Matsui |
Publication Detail:
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Type: Journal Article Date: 2009-11-07 |
Journal Detail:
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Title: Radiological physics and technology Volume: 3 ISSN: 1865-0341 ISO Abbreviation: Radiol Phys Technol Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-09-07 Completed Date: 2011-01-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101467995 Medline TA: Radiol Phys Technol Country: Japan |
Other Details:
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Languages: eng Pagination: 40-5 Citation Subset: IM |
Affiliation:
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Department of Radiological Technology, School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kodatsuno, Kanazawa, Japan. rie44@mhs.mp.kanazawa-u.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Female Heart / physiology, physiopathology Humans Image Processing, Computer-Assisted / instrumentation, methods* Lung / blood supply*, radiography Lung Diseases / physiopathology, radiography Male Middle Aged Regional Blood Flow* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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