“…Furthermore, the GI transit function, including gastric emptying and GI motility, can be observed and evaluated non-invasively by scintigraphy, ultrasound, MRI, electrogastrography, and magnetogastrography. These methods measure the motility and movements of the luminal contents by imaging (scintigraphy, ultrasound, MRI) (Benini et al 1999, Córdova-Fraga et al 2017, bioelectric (electrogastrography), orbiomagnetic (magnetogastrography) analyses (Bradshaw et al 2003, de la Roca-chiapas et al 2007. Recently, ambulatory technology-based ingestible wireless capsule devices have been developed to track capsule movements and to measure the motility patterns of the gut, such as wireless-capsule GI endoscopy (Nakamura and Terano 2008), the wireless motility capsule (Farmer et al 2013) and the 3D-transit system (Mark et al 2019b).…”