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Use of respiratory biofeedback and CLAWS for increased navigator efficiency for imaging the thoracic aorta

Jhooti, P. and Haas, T. and Kawel, N. and Bremerich, J. and Keegan, J. and Scheffler, K.. (2011) Use of respiratory biofeedback and CLAWS for increased navigator efficiency for imaging the thoracic aorta. Magnetic resonance in medicine, Vol. 66, H. 6. pp. 1666-1673.

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Official URL: http://edoc.unibas.ch/dok/A6006563

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Abstract

A novel technique to guide a subjects' breathing pattern using a respiratory biofeedback (rBF) "game" to improve respiratory efficiency is presented. The continuously adaptive windowing strategy, a fully automatic and highly efficient free-breathing navigator gated technique, is used to acquire the data as it ensures that all potential navigator acceptance windows are possible. This enables the rBF to be fully adaptable to a subject's respiratory pattern. Images of the thoracic aorta acquired using balanced steady-state free precession with continuously adaptive windowing strategy respiratory motion control, with and without rBF, were compared in 10 healthy subjects. Total scan time was reduced by using rBF. The mean scan time was reduced from 7 min 44 s (463 cardiac cycles, ± 127 cc) without rBF to 5 min 43 s (380 cardiac cycles, ± 118 cc) with the use of rBF (P > 0.05). Respiratory efficiency was increased from 45% without rBF to 56% with rBF (P > 0.01). Image quality was the same for both techniques (P = ns). In conclusion, rBF significantly improved respiratory efficiency and reduced acquisition duration without affecting image quality.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Medizinische Radiologie (Steinbrich)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Medizinische Radiologie (Steinbrich)
UniBasel Contributors:Bremerich, Jens
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Wiley-Liss
ISSN:0740-3194
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:13 Sep 2013 07:59
Deposited On:13 Sep 2013 07:49

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