N. Katz et al., GASTRIC-EMPTYING - COMPARISON OF ANTERIOR ONLY AND GEOMETRIC MEAN CORRECTION METHODS EMPLOYING STATIC AND DYNAMIC IMAGING, Clinical nuclear medicine, 19(5), 1994, pp. 396-400
Dynamic (continuous) and static imaging techniques were compared in th
e analysis of gastric emptying patterns in 16 consecutive adult patien
ts with normal gastric half-emptying times assessed by dynamic imaging
for 90 minutes under a dual head camera allowing simultaneous anterio
r and posterior imaging. Gastric t1/2 values were calculated for each
patient based on four different data analysis methods: geometric mean
corrected dynamic data (GD), anterior alone dynamic data (AD), geometr
ic mean corrected simulated static data (GS), and anterior alone simul
ated static data (AS). The mean t1/2 values were: GD = 63.8 minutes, A
D = 72.1 minutes, GS = 65.3 minutes, and AS = 73.0 minutes. Both the g
eometric mean corrected methods had a statistically different t1/2 tha
n either of the anterior methods. Lag phase measurements, defined as a
2% decrease in gastric activity were: GD = 7 minutes, AD = 19 minutes
, GS = 6 minutes, and AS = 16 minutes. Dynamic and static geometric me
an methods provide similar gastric t1/2 calculations that are statisti
cally different than anterior alone methods, and the lag phase is much
shorter using either of the geometric mean methods.