At each time point, the positioning of the subject, setup and data collection will take ~15min. After the first 60 min, at completion of data collection at each time-point, the volunteers will be kept sitting upright in a quiet lounge next to the scanner. At each time point, volunteers will fill a 100mm Visual Analogue Scale (VAS) symptoms questionnaire scoring their feeling of fullness, bloating, distension, abdominal pain/discomfort and nausea. The VAS anchors were from 'not' to 'extremely'. Participants will be given a meal at the end of the study.