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Simplifying the measurement of gastric accommodation using SPECT
P Vijayvargiya1, M Camilleri, A Shin
1Clinical Enteric Neuroscience Translational and Epidemiological Research (CENTER), Mayo Clinic, Rochester, MN 55905,, USA.
Neurogastroenterology and Motility
|February 19, 2013
Summary
A single postprandial scan accurately measures gastric accommodation, simplifying the single photon emission computed tomography (SPECT) test. This method provides reliable gastric volume data within 15 minutes after a meal.
Area of Science:
- Gastroenterology
- Nuclear Medicine
- Medical Imaging
Background:
- Single photon emission computed tomography (SPECT) is a validated non-invasive test for postprandial gastric volume accommodation.
- Current SPECT protocols involve two measurements over 30 minutes, averaging the results for gastric volume assessment.
Purpose of the Study:
- To simplify the SPECT measurement of gastric accommodation.
- To evaluate if a single postprandial SPECT scan can accurately assess gastric volume accommodation compared to the standard two-scan method.
Main Methods:
- Retrospective analysis of SPECT data from 443 patients and healthy volunteers.
- Comparison of two postprandial gastric volume measurements.
- Statistical analysis of differences, correlation, and agreement between the two scans across a wide range of gastric volumes.
Main Results:
- A median difference of less than 2% was observed between the two postprandial scans (757 mL vs. 743 mL).
- A significant correlation (rs = 0.859, P < 0.01) and excellent agreement (SD 60 mL) were found between the two measurements.
- These results held true across the entire range of observed postprandial gastric volumes.
Conclusions:
- A single postprandial SPECT scan is as accurate as averaging two scans for detecting gastric accommodation.
- Simplifying the SPECT measurement by using a single scan within the first 15 minutes post-meal is supported by these findings.
- This simplification can improve the efficiency of assessing postprandial gastric volume.
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