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Thermal noise variance of a receive radiofrequency coil as a respiratory motion sensor
Magnetic resonance in medicine, 2017-01, Vol.77 (1), p.221-228
Andreychenko, A.
Raaijmakers, A.J.E.
Sbrizzi, A.
Crijns, S.P.M.
Lagendijk, J.J.W.
Luijten, P.R.
van den Berg, C.A.T.
2017
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Andreychenko, A.
Raaijmakers, A.J.E.
Sbrizzi, A.
Crijns, S.P.M.
Lagendijk, J.J.W.
Luijten, P.R.
van den Berg, C.A.T.
Titel
Thermal noise variance of a receive radiofrequency coil as a respiratory motion sensor
Ist Teil von
Magnetic resonance in medicine, 2017-01, Vol.77 (1), p.221-228
Ort / Verlag
United States: Wiley Subscription Services, Inc
Erscheinungsjahr
2017
Quelle
MEDLINE
Beschreibungen/Notizen
Purpose Development of a passive respiratory motion sensor based on the noise variance of the receive coil array. Methods Respiratory motion alters the body resistance. The noise variance of an RF coil depends on the body resistance and, thus, is also modulated by respiration. For the noise variance monitoring, the noise samples were acquired without and with MR signal excitation on clinical 1.5/3 T MR scanners. The performance of the noise sensor was compared with the respiratory bellow and with the diaphragm displacement visible on MR images. Several breathing patterns were tested. Results The noise variance demonstrated a periodic, temporal modulation that was synchronized with the respiratory bellow signal. The modulation depth of the noise variance resulting from the respiration varied between the channels of the array and depended on the channel's location with respect to the body. The noise sensor combined with MR acquisition was able to detect the respiratory motion for every k‐space read‐out line. Conclusion Within clinical MR systems, the respiratory motion can be detected by the noise in receive array. The noise sensor does not require careful positioning unlike the bellow, any additional hardware, and/or MR acquisition. Magn Reson Med 77:221–228, 2017. © 2016 Wiley Periodicals, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0740-3194
eISSN: 1522-2594
DOI: 10.1002/mrm.26108
Titel-ID: cdi_proquest_miscellaneous_1859474308
Format
–
Schlagworte
Algorithms
,
Diaphragm
,
Diaphragm - diagnostic imaging
,
Diaphragm - physiology
,
Humans
,
Magnetic Resonance Imaging - methods
,
Modulation
,
motion correction
,
motion monitoring
,
motion sensor
,
Motion sensors
,
Motional resistance
,
Movement - physiology
,
Noise
,
Noise monitoring
,
Radio frequency
,
Radio Waves
,
receive RF coil
,
Respiration
,
Scanners
,
Sensor arrays
,
Sensors
,
Signal Processing, Computer-Assisted
,
Signal-To-Noise Ratio
,
Thermal noise
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