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2015 UK software audit of hepatobiliary scintigraphy
Emma R O'Shaughnessy1, Anthony Murray2, Jonathan C Taylor3
1Poole Hospital NHS Foundation Trust, Poole.
Nuclear Medicine Communications
|January 17, 2019
Summary
Hepatobiliary function imaging protocols vary widely across UK hospitals, leading to inconsistent gallbladder ejection fraction (GBEF) calculations. Standardizing stimulus, acquisition time, and motion correction is crucial for reliable GBEF assessment.
Area of Science:
- Nuclear Medicine
- Medical Imaging
- Gastroenterology
Background:
- Hepatobiliary function imaging is essential for assessing gallbladder motility.
- Significant protocol variations exist in UK hospitals for calculating gallbladder ejection fraction (GBEF).
Purpose of the Study:
- To audit current practices in hepatobiliary function imaging across UK centers.
- To identify and analyze protocol differences affecting GBEF calculations.
Main Methods:
- Survey of 52 UK centers regarding their GBEF acquisition and processing parameters.
- Analysis of two dynamic datasets using participants' routine GBEF calculation methods.
Main Results:
- Large variability in GBEF results due to differences in calculation methods, motion correction, and imaging times.
- Acquisition time post-stimulus (20-70 min) and fatty stimulus amount (<10g in 13.5% of centers) significantly impacted GBEF.
- Motion correction, crucial for accuracy, was not used by 25% of participants.
Conclusions:
- Recommended gold standards include a minimum 10g fat stimulus and 60-min image acquisition post-stimulus.
- Consistent use of motion correction and adherence to reference ranges for stimulus are vital for accurate GBEF reporting.
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