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Gastric motor function and emptying in the right decubitus and seated body position as assessed by magnetic resonance imaging
Author(s) -
Treier Reto,
Steingoetter Andreas,
Weishaupt Dominik,
Goetze Oliver,
Boesiger Peter,
Fried Michael,
Schwizer Werner
Publication year - 2006
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.20507
Subject(s) - gastric emptying , postprandial , stomach , medicine , meal , magnetic resonance imaging , body position , ingestion , nuclear medicine , gastroenterology , radiology , insulin , physical medicine and rehabilitation
Purpose To determine the effect of the right decubitus lying body position (RP) on relevant parameters of human gastric motor function in healthy volunteers. Materials and Methods Postprandial gastric function after ingestion of a solid/liquid meal (150 g/150 mL) was assessed over 90 minutes in volunteers in the RP and seated position (SP). Ten healthy volunteers were imaged using two MRI systems that differed in architecture and field strength. Stomach and intragastric air volume, intragastric meal distribution, gastric emptying, and gastric peristalsis were compared between the RP and SP. Results Body position did not affect gastric relaxation (RP, 372 mL vs. SP, 384 mL) and initial gastric volumes (stomach: RP, 458 mL vs. SP, 462 mL; meal: RP, 377 mL vs. SP, 399 mL; intragastric air: RP, 110 mL vs. SP, 98 mL). Postprandial stomach volume and gastric activity (RP and SP, 3.1 minute –1 ) were also similar. Meal emptying showed different characteristics, resulting in a significant but small difference in meal volume of –43 mL at t = 90 minutes ( P < 0.05). Conclusion Gastric MRI in RP is feasible for clinical research assessing gastric motor function. The subtle difference in meal emptying may be induced by posture‐dependent vagal activity. This study confirms that MRI is a highly sensitive imaging technique for assessing gastrointestinal function in humans. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.