| A novel in vivo method for lung segment movement tracking. | |
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MedLine Citation:
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PMID: 22298293 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Knowledge about lung movement in health and disease is sparse. Current evaluation methods, such as CT, MRI and external view have significant limitations. To study respiratory movement for image guided tumour diagnostics and respiratory physiology, we needed a method that overcomes these limitations. We fitted balloon catheters with electromagnetic sensors, and placed them in lung lobes of ventilated pigs. The sensors sensed their position at 40 Hz in an electromagnetic tracking field with a precision of ∼0.5 mm. The method was evaluated by recording sensor movement in different body positions and at different tidal volumes. No 'gold standard' exists for lung segment tracking, so our results were compared to 'common knowledge'. The sensors were easily placed, showed no clinically relevant position drift and yielded sub-millimetre accuracy. Our measurements fit 'common knowledge', as increased ventilation volume increased respiratory movement, and the right lung moved significantly less in the right than the left lateral position. The novel method for tracking lung segment movements during respiration was easy to implement and yielded high spatial and temporal resolution, and the equipment parts are reusable. It is easy to implement as a research tool for lung physiology, navigated bronchoscopy and radiation therapy. |
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Authors:
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H O Leira; G A Tangen; E F Hofstad; T Langø; T Amundsen |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-01 |
Journal Detail:
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Title: Physics in medicine and biology Volume: 57 ISSN: 1361-6560 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401220 Medline TA: Phys Med Biol Country: - |
Other Details:
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Languages: ENG Pagination: 1071-1086 Citation Subset: - |
Affiliation:
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Department of Thoracic Medicine, St Olavs Hospital, Trondheim, Norway. Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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