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Miniaturized Fiber-Optic Transmission System for MRI Omer Gokalp Memis,1 Yigitcan Eryaman,1 Orhan Aytur,1 and Ergin Atalar1,2*

Summary: Miniaturized Fiber-Optic Transmission System for MRI
Omer Gokalp Memis,1 Yigitcan Eryaman,1 Orhan Aytur,1 and Ergin Atalar1,2*
Conventional MRI instruments transmit received MRI signals
through electrical cables. Although this design has proved to be
effective over the years, we report a fiber-optic system that
addresses the needs of recent developments in MRI technol-
ogy. One of these technologies is phased array coils with a high
number of elements, where total size of interconnections is a
primary problem, and other problem is internal MRI coils, where
there is a need for improvements in safety. The Miniature Fiber-
Optic Transmission (FOT) System was developed to address
these issues. The system consists of a receiver coil with active
detuning, a low-noise preamplifier, and a laser diode connected
to a photodetector with fiber-optic cabling. The overall noise
figure of the system is lower than 1 dB. Total power consump-
tion is 50 mW, and the device is switchable with another fiber-
optic line, which can also control active detuning. A prototype
device was tested in a GE 1.5 Tesla MRI scanner, and several
images were acquired with a signal to noise ratio similar to


Source: Atalar, Ergin - Department of Electrical and Electronics Engineering, Bilkent University


Collections: Engineering; Biology and Medicine