state-of-the-art medical imaging software solutions

Gastric Emptying

Hermes Hybrid Viewer™ NM Processing Gastric Emptying

Dynamic

Static

• Motion Correction
• Calculations from geometric mean images
• Three types of curve fi tting

Summery of features

• Motion correction using manually adjustable regions of interest. For each image frame the user can manually adjust the position of the ROIs in order to fully cover the stomach.
• If posterior images are available, the ROIs are fl ipped horizontally to match these images
• Correction for downscatter for dual isotope studies
• Background correction if requested
• Decay correction
• If anterior and posterior frames are available, calculation of the geometric mean of the counts in the stomach region
• Three types of curve fi tting, Linear, Exponential and Siegel, based on algorithms described in the literature
• Graphical display with images, input data and calculated results
• User selectable interval for curve fits

Quantitative Results

Percentage Residual Activity calculated at user specifi ed times, using selected curve fit.
Time at 90% washout using selected curve fit.
Half time using selected curve fit.

References

Roelof Bennink, Marc Peeters, Vera Van den Maegdenbergh, Benny Geypens, Paul Rutgeers, Michel De Roo, Luc Mortelmans
Comparison of total and compartmental gastric emptying and antral motility between healthy men and women.
European Journal of Nuclear Medicine Vol.25, No.9, September 1998
Janssens J, Peeters TL, Vantrappen G, Tack J, Urbain JL, De Roo M, Muls E, Bouillon R.
Improvement of gastric emptying in diabetic gastroparesis by erythromycin. Preliminary studies.
N Engl J Med. 1990;322(15):1028-31
Harding LK, Notghi A Ch. 11 Practical Nuclear Medicine 2nd edition Oxford Med Pub.
Siegel JA, Urbain J-L, Adler LP, et al., The biphasic nature of gastric emptying, GUT 29: 85-89 (1988)

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