Martin Zimmerling

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OBJECTIVE To investigate the level of demagnetization of the magnets and temperature changes in cochlear implants (Cis) in a 3.0 tesla (3.0T) MRI. STUDY DESIGN Experimental. SUBJECTS AND METHODS Demagnetization and remagnetization measurements were done on magnets for different types of CIs. Temperature of different body and electrode sides was measured(More)
This work introduces a new digital signal processor (DSP) architecture concept, which provides increased instruction-level parallelism (ILP), flexibility and scalability compared to state-of-the-art DSPs. The concept can be characterized by an enhanced RISC microprocessor with a tightly coupled reconfigurable ALU array, a vector load/store unit and a(More)
OBJECTIVE Objective measurements can be helpful for cochlear implant fitting of difficult populations, as for example very young children. One method, the recording of the electrically evoked compound action potential (EAP), measures the nerve recruitment in the cochlea in response to stimulation through the implant. For coding strategies implemented at a(More)
The pulse transit time (PTT) is a parameter which can be used to characterize the functional state of the cardiovascular system. The PTT, which is closely connected to the blood pressure, can be derived from an electrocardiogram (ECG) and a simultaneously recorded photoplethysmogram (PPG) signal. In contrast to conventional non-invasive blood pressure(More)
The aim of this study was to evaluate artifacts produced by cochlear implants (CI) during 3.0 Tesla (T) magnetic resonance imaging of the brain using different sequences on phantom and cadaveric specimens. A phantom and three cadaveric specimens with CIs were imaged using a 3.0 T clinical scanner. Artifacts were analyzed quantitatively and according to the(More)
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