Journal of Gastrointestinal & Digestive System
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Alternating Current Biosusceptometer (ACB) employs a pickup coil to generate an AC magnetic field over the gastrointestinal
(GI) region and the ferromagnetic contrast ingested by subject produces a secondary magnetic field measured by the
magnetometers. This technique is sensitive to distance variations between the magnetometers and the magnetic contrast, thus
the method is capable of tracking the magnetic test meal through the GI tract as well as to assess GI motility. Both of them are
important for diagnosis of different kind of diseases and to perform research related to the GI tract. A number of techniques
have been used to evaluate the GI tract such as scintigraphy, fluoroscopy, and manometry. However, all of them present some
inconvenience such as use of ionizing radiation or to be invasive. GI Scintigraphy is regarded as the gold standard method for
the assessment of gastric motility and gastric emptying time (GET) in humans. However, its use for investigative purposes is
prohibitive given its costs and the need to use a radioisotope as contrast. ACB has the competitive advantage over all of them.
ACB is non-invasive, radiation-free, easy to perform, portable, and may be used for clinical and investigative purposes. It may
open the door for unprecedented discoveries by expanding possibilities and increasing the efficiency of research, as well as to
make accurate and reliable pediatrics gastrointestinal diagnostics at a fraction of current costs without the risks of radiation. In
addition, the ACB could have significant impact in physiological research, pharmacology, and pharmaceutics.
Fabiano C. Paixao received the degree in Physics (2004) and completed his Ph.D. in General and Applied Biology (2009) at Univ. Estadual Paulista
(UNESP), Bauru and Botucatu, SP, Brazil. In early 2010 and 2011, he was an Adjunct Professor at the Pontifical Catholic University of Rio Grande
do Sul and former Professor of the Department of Physics and Biophysics at UNESP, between 2006 and 2009. He has published papers in reputed
journals and conferences around the world. He has filed patents and founded a start-up business in US. He was a pioneer in making this work at
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