title: Effect of ingestion order of the fat component of a solid meal on intragastric fat distribution and gastric emptying assessed by MRI.
abstract: OBJECTIVE
  To develop an MRI technique to investigate how varying the ingestion order of nonfat and fat components of a solid meal influences three-dimensional intragastric distribution and gastric emptying (GE).
  
  
  METHODS
  Eight healthy subjects were studied twice in randomized order. On one occasion (condition F-NF), the fat component (40 g mayonnaise on toast) was served before the nonfat component (270 g pasta, 200 g tomato sauce, 100 mL water); on the other (condition NF-F), the ingestion order was reversed. GE and intragastric distribution of both components were assessed by MRI for 180 minutes.
  
  
  RESULTS
  During condition F-NF, GE of fat was significantly faster than during condition NF-F (T(25) [min]: F-NF: 20 +/- 9; NF-F: 40 +/- 7; P < 0.05), a larger amount of fat was observed in the antrum during condition F-NF, and more fat layering occurred. No differences were observed in total GE between the two conditions.
  
  
  CONCLUSIONS
  Meal ingestion order influences GE and intragastric distribution of fat, which can be assessed by MRI techniques, providing new insights into the physiology of gastric processing and intragastric distribution of different meal phases.
authors.affiliation: Institute of Biomedical Engineering and Medical Informatics, ETH and University Zurich, Zurich, Switzerland.
authors.forename: Patrik
authors.initials: P
authors.lastname: Kunz
authors.forename: Christine
authors.initials: C
authors.lastname: Feinle-Bisset
authors.forename: Henryk
authors.initials: H
authors.lastname: Faas
authors.forename: Peter
authors.initials: P
authors.lastname: Boesiger
authors.forename: Michael
authors.initials: M
authors.lastname: Fried
authors.forename: Andreas
authors.initials: A
authors.lastname: Steingötter
authors.forename: Werner
authors.initials: W
authors.lastname: Schwizer
mesh_terms: D000328:Adult; D004041:Dietary Fats / Q000008:administration & dosage*; D005260:Female; D005746:Gastric Emptying / Q000502:physiology*; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008297:Male; D013270:Stomach
chemical_list: D004041:Dietary Fats