Krzysztof Wawrzyn

Krzysztof Wawrzyn
The University of Western Ontario | UWO

Master of Science
http://wawrzyn.ca

About

11
Publications
1,907
Reads
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55
Citations
Citations since 2016
8 Research Items
46 Citations
2016201720182019202020212022051015
2016201720182019202020212022051015
2016201720182019202020212022051015
2016201720182019202020212022051015
Introduction
Skills and Expertise

Publications

Publications (11)
Article
Inhaled hyperpolarized ¹²⁹Xe MRI is a non-invasive and radiation risk free lung imaging method, which can directly measure the business unit of the lung where gas exchange occurs: the alveoli and acinar ducts (lung function). Currently, three imaging approaches have been demonstrated to be useful for hyperpolarized ¹²⁹Xe MR in lungs: Fast Gradient...
Article
This paper presents the design and validation of a tuned time-domain electric field probe for mapping of radio frequency (RF) exposures used during testing of magnetic resonance imaging (MRI) conditional medical devices. The probes were 5 and 10 mm short dipole antenna, developed as a tradeoff between spatial resolution, linearity, and sensitivity....
Article
Full-text available
Transcranial direct current stimulation (tDCS) is a form of non-invasive brain stimulation that may modulate cortical excitability, metabolite concentration, and human behaviour. The supplementary motor area (SMA) has been largely ignored as a potential target for tDCS neurorehabilitation but is an important region in motor compensation after brain...
Preprint
Full-text available
Transcranial direct current stimulation (tDCS) is a form of non-invasive brain stimulation that may modulate cortical excitability, metabolite concentration, and human behaviour. The supplementary motor area (SMA) has been largely ignored as a potential target for tDCS neurorehabilitation but is an important region in motor compensation after brain...
Conference Paper
Abstract— Radio frequency (RF) heating of leads on medical-ly implanted devices is a critical patient safety matter in Magnet-ic Resonance Imaging (MRI). Safety is generally assessed via large-scale computer simulations, which relies on the use of a “transfer function” (TF) approach in order to make the simula-tions sufficiently efficient to allow...
Article
Full-text available
This work presents electric and magnetic probes to measure radio frequency (RF) electric and magnetic fields for measuring the time-varying RF fields used in magnetic resonance imaging (MRI). A small single loop (2 cm) and short dipole antenna (2 cm) were developed to monitor the near field magnetic and electric exposure during the medical device t...
Article
Full-text available
We demonstrate the feasibility of using optical coherence tomography (OCT) to detect and image an electro-kinetic response: electric-field induced optical changes (EIOC) in soft biological tissues. A low-frequency electric field was applied to ex vivo samples of porcine heart tissues, while OCT signals were acquired continuously. Experimental resul...
Conference Paper
Full-text available
The capability of optical coherent tomography (OCT) to detect changes induced by physiological level electric field in biological tissue is demonstrated. The suggested method can potentially image the electro-kinetic properties of tissues with OCT.

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