| Improvement of data acquisition and analysis to evaluate regional ventilation. | |
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MedLine Citation:
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PMID: 3159577 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To evaluate the regional ventilation using 133Xe under different conditions, the respiratory flow and the phase with image were measured simultaneously, and sequential frames were made breath by breath. The flow signal and phase signal were converted to pulse signals by a microcomputer and stored with image data in the same file. Thus, the tidal volume and duration of each breath were measured. From sequential frames compiled breath by breath, an activity breath-number curve was made in each pixel, and the half-clearance breath number (B1/2) was calculated. The changes in conventional half-clearance time (T1/2) and B1/2 were compared under different ventilatory conditions in normal subjects and in patients with chronic pulmonary emphysema. Values of B1/2 indicated the change of turnover rate more accurately than T1/2. It is considered that B1/2 is a better parameter than T1/2 for evaluating the change in regional ventilatory function under different conditions. |
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Authors:
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H Ikeda; K Takahashi; S Yasui; A Komatani; K Takahashi; K Yamaguchi |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: European journal of nuclear medicine Volume: 10 ISSN: 0340-6997 ISO Abbreviation: Eur J Nucl Med Publication Date: 1985 |
Date Detail:
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Created Date: 1985-07-29 Completed Date: 1985-07-29 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7606882 Medline TA: Eur J Nucl Med Country: GERMANY, WEST |
Other Details:
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Languages: eng Pagination: 406-10 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Analog-Digital Conversion Humans Male Microcomputers Pulmonary Emphysema / physiopathology Respiration* Rheology Xenon Radioisotopes / diagnostic use |
| Chemical | |
Reg. No./Substance:
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0/Xenon Radioisotopes |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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