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Related Experiment Video

Updated: Jun 28, 2026

Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

Published on: September 22, 2023

The gastric emptying study: protocol design considerations.

William C Klingensmith¹, Steven P Lawrence

¹Department of Radiology, Porter Hospital, Denver, Colorado, USA. bill.klingensmith@mac.com

Journal of Nuclear Medicine Technology

|November 15, 2008

Summary

This summary is machine-generated.

Instant oatmeal and scrambled eggs provide similar gastric emptying information. Frequent stomach-colon overlap in CT imaging may complicate delayed scans, while LAO projection offers better jejunum visualization.

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Area of Science:

Gastroenterology
Nuclear Medicine
Radiology

Background:

Gastric emptying studies are crucial for diagnosing gastrointestinal motility disorders.
Standardized meal compositions and imaging techniques are essential for reliable results.
Understanding anatomical overlap in imaging projections is key for accurate interpretation.

Purpose of the Study:

To assess the intrapatient correlation of gastric emptying times using instant oatmeal and scrambled egg meals.
To evaluate the degree of stomach-colon and stomach-jejunum overlap in anterior-posterior (AP) and left anterior oblique (LAO) CT projections.

Main Methods:

15 patients underwent two gastric emptying studies (oatmeal and egg meals labeled with 99mTc-sulfur colloid) 1 day apart.
Upright LAO projection imaging with 1-minute digital images every 15 minutes to calculate half-time of emptying.
100 abdominal CT studies were analyzed for stomach-colon/jejunum overlap in AP and LAO projections, categorized as none, mild, moderate, or marked.

Main Results:

A significant correlation (r=0.77, P<0.01) was found between gastric emptying half-times for oatmeal and egg meals in 14 patients.
Stomach-colon overlap occurred in 74% (AP) and 82% (LAO) of CT studies.
Stomach-jejunum overlap was frequent (77% AP, 52% LAO), with less overlap in the LAO projection (P<0.05).

Conclusions:

Instant oatmeal and scrambled eggs are comparable for assessing gastric emptying.
Frequent stomach-colon overlap in CT imaging may interfere with delayed scans due to colonic activity.
The LAO projection may be advantageous for gastric emptying studies due to reduced stomach-jejunum overlap, aiding lag time calculations.