Cardiac activity measurement from video signals of the human skin in ultrahigh-field magnetic resonance imaging


Ultra-high-®eld magnetic resonance imaging (MRI) with ®eld strengths ≥ 7 Tesla comes with many bene®ts concerning image quality such as increased signal-to-noise ratio (SNR) as well as high spatial and temporal resolution. However, there are still many technical challenges encountered, impeding its full potential. For example, conventional contact-based methods for cardiac monitoring and triggering such as pulse oximetry and electrocardiography are limited by an increased error rate at higher ®eld strengths. In this paper, we give an overview on our works in developing video-based, contact-free, real-time methods to overcome these limitations based on recent ®ndings in remote vital sign measurement.


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