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Authors: Fotios N. Vlachos ; Anastasios D. Garetsos and Nikolaos K. Uzunoglu

Affiliation: School of Electrical and Computer Engineering, Narional Technical University of Athens, Greece

Keyword(s): Automatic tuning, phased array, MR imaging, spectroscopy.

Related Ontology Subjects/Areas/Topics: Biomedical Engineering ; Biomedical Equipment ; Biomedical Instrumentation ; Biomedical Instruments and Devices ; Biomedical Metrology ; Low-Power Design ; Microelectronics

Abstract: We have designed and developed an automatic switching mechanism that deactivates and activates a reception coil during the MR experiment according to the phase it is at. The mechanism uses a feedback loop in which a comparator defines whether the current reception signal derives from the RF excitation pulses or the MR signal and then triggers an analog switch at the back-end of the coil accordingly. We applied the mechanism on a custom-made four channel phased array probe and tested its functionality by transmitting RF pulses to the probe of similar length and power to those used in actual MRI systems. The results presented in this paper demonstrate the robustness of the design and its switching accuracy.

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Paper citation in several formats:
N. Vlachos, F.; D. Garetsos, A. and K. Uzunoglu, N. (2008). AUTOMATIC DEACTIVATION DESIGN FOR PHASED ARRAY SURFACE PROBE IN 1.5T MRI. In Proceedings of the First International Conference on Biomedical Electronics and Devices (BIOSTEC 2008) - Volume 1: BIODEVICES; ISBN 978-989-8111- 17-3; ISSN 2184-4305, SciTePress, pages 160-163. DOI: 10.5220/0001050501600163

@conference{biodevices08,
author={Fotios {N. Vlachos}. and Anastasios {D. Garetsos}. and Nikolaos {K. Uzunoglu}.},
title={AUTOMATIC DEACTIVATION DESIGN FOR PHASED ARRAY SURFACE PROBE IN 1.5T MRI},
booktitle={Proceedings of the First International Conference on Biomedical Electronics and Devices (BIOSTEC 2008) - Volume 1: BIODEVICES},
year={2008},
pages={160-163},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001050501600163},
isbn={978-989-8111- 17-3},
issn={2184-4305},
}

TY - CONF

JO - Proceedings of the First International Conference on Biomedical Electronics and Devices (BIOSTEC 2008) - Volume 1: BIODEVICES
TI - AUTOMATIC DEACTIVATION DESIGN FOR PHASED ARRAY SURFACE PROBE IN 1.5T MRI
SN - 978-989-8111- 17-3
IS - 2184-4305
AU - N. Vlachos, F.
AU - D. Garetsos, A.
AU - K. Uzunoglu, N.
PY - 2008
SP - 160
EP - 163
DO - 10.5220/0001050501600163
PB - SciTePress

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