Gastric Motility: Comparison of Assessment with Real-Time MR Imaging or Barostat Measurement—Initial Experience

Zwart, Ingrid M. de; Mearadji, Banafsche; Lamb, Hildo J.; Eilers, Paul H.C.; Masclee, Ad; Roos, Albert de; Kunz, Patrik

doi:10.1148/radiol.2242011412

Cited by 65 publications

(79 citation statements)

References 19 publications

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“…Total gastric volume was calculated by adding intragastric air and contents volumes. This method has been described previously (8).…”

Section: Discussionmentioning

confidence: 99%

“…The multilumen catheter was elongated with a 3-m-long catheter (16 Fr) allowing the barostat device to be placed out of the vicinity of the MRI device. A previous study has shown that elongation of the multilumen catheter does not influence MDP, nor does it influence intragastric bag volume (8). The barostat device keeps the pressure in the intragastric bag at a preselected level.…”

Section: Gastric Barostatmentioning

confidence: 99%

“…A volume scan (20 slices, thickness 10 mm, slice gap 0 mm, echo time 3.48 msec, repetition time 10.00 msec, flip angle 25 , field of view 450 mm, matrix 256 Â 256 pixels, total acquisition time 30 sec) was performed to determine momentary volumes. This MRI technique has been used and validated previously (8,(10)(11)(12).…”

Section: Mrimentioning

confidence: 99%

“…Volumes ranged from 25 to 600 mL. Volume scans were acquired using previously validated MRI techniques (8,(10)(11)(12).…”

Section: Mri Measurements Of Predefined Meal Volumes In Vitromentioning

confidence: 99%

“…More recently, noninvasive imaging techniques have been employed to study gastric volume changes (5)(6)(7). In a previous study (8) a good correlation between barostat and magnetic resonance imaging (MRI) with respect to gastric volumes and dynamic volume changes in healthy volunteers under fasting conditions and in response to glucagon (gastric relaxation) and erythromycin (antral contractions) was shown. However, further in vivo validation of the MRI technique is required.…”

mentioning

confidence: 99%

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Gastric volume changes in response to a meal: Validation of magnetic resonance imaging versus the barostat

Haans

Zwart

Eilers

et al. 2011

Magnetic Resonance Imaging

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Purpose: To determine the accuracy of magnetic resonance imaging (MRI) volume scans: 1) to measure known meal volumes in vitro, and 2) to compare volume changes in response to a meal measured with the barostat with those measured with MRI in vivo.Materials and Methods: Polyethylene bags were filled with known volumes and MRI volume scans were performed to determine the accuracy of the volume measurements. Barostat measurements and MRI volume scans were performed simultaneously in 14 healthy subjects before and up to 90 minutes after ingestion of a liquid meal.Results: In vitro MRI-determined volumes showed an excellent linear relationship (r ¼ 0.995, P < 0.001) with actual meal volumes. Although fasting gastric volume, postprandial gastric volume, and relaxation volume measured with MRI were significantly larger compared to volumes measured with the barostat, volumes determined with both techniques showed excellent correlation.

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“…Total gastric volume was calculated by adding intragastric air and contents volumes. This method has been described previously (8).…”

Section: Discussionmentioning

confidence: 99%

Section: Gastric Barostatmentioning

confidence: 99%

Section: Mrimentioning

confidence: 99%

“…Volumes ranged from 25 to 600 mL. Volume scans were acquired using previously validated MRI techniques (8,(10)(11)(12).…”

Section: Mri Measurements Of Predefined Meal Volumes In Vitromentioning

confidence: 99%

mentioning

confidence: 99%

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Gastric volume changes in response to a meal: Validation of magnetic resonance imaging versus the barostat

Haans

Zwart

Eilers

et al. 2011

Magnetic Resonance Imaging

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Mechanics of the stomach: A review of an emerging field of biomechanics

et al. 2019

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Mathematical and computational modeling of the stomach is an emerging field of biomechanics where several complex phenomena, such as gastric electrophysiology, fluid mechanics of the digesta, and solid mechanics of the gastric wall, need to be addressed. Developing a comprehensive multiphysics model of the stomach that allows studying the interactions between these phenomena remains one of the greatest challenges in biomechanics. A coupled multiphysics model of the human stomach would enable detailed in‐silico studies of the digestion of food in the stomach in health and disease. Moreover, it has the potential to open up unprecedented opportunities in numerous fields such as computer‐aided medicine and food design. This review article summarizes our current understanding of the mechanics of the human stomach and delineates the challenges in mathematical and computational modeling which remain to be addressed in this emerging area.

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Assessment of small bowel motility function With cine‐MRI using balanced steady‐state free precession sequence

Wakamiya

Furukawa

Kanasaki

et al. 2011

Magnetic Resonance Imaging

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Purpose: To evaluate the use of cine-magnetic resonance imaging (MRI) with a steady-state free precession sequence to monitor and assess small bowel motility.Materials and Methods: Sequential MRI, using a balanced steady-state free precession sequence, was performed in eight healthy male volunteers at 0, 15, 30, 45, and 60 minutes after oral administration of 1500 mL of nonabsorbable fluid to monitor small bowel contractions. Using the cine-mode display, small bowel contractions were reviewed and the luminal diameter was measured on each image to obtain frequency and amplitude of bowel contractions.Results: The oral preparation was well tolerated without major complications. Cine-MRI provided high temporal, spatial, and contrast resolution for monitoring bowel contractions. Mean values with standard deviations of frequency and amplitude of bowel contractions were 6.0 6 2.98/min and 10.4 6 4.53 mm, respectively, and were 5.1 6 3.38/min and 9.59 6 5.57 mm at the jejunal loops and 6.9 6 2.22/min and 11.2 6 3.06 mm at the ileal loops. With the passage of luminal fluid, frequency of bowel contractions decreased and the bowels tended to pause their contractions. Conclusion:Cine-MRI provides sufficient dynamic images to observe small bowel contractions. Measurement of bowel caliber permits calculation of amplitude and frequency of the contractions for characterization and quantitative assessment of small bowel motility function.

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Gastric Motility: Comparison of Assessment with Real-Time MR Imaging or Barostat Measurement—Initial Experience

Cited by 65 publications

References 19 publications

Gastric volume changes in response to a meal: Validation of magnetic resonance imaging versus the barostat

Gastric volume changes in response to a meal: Validation of magnetic resonance imaging versus the barostat

Mechanics of the stomach: A review of an emerging field of biomechanics

Assessment of small bowel motility function With cine‐MRI using balanced steady‐state free precession sequence

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