TABLE 4

Performance of SGD Versus RPM

Performance parameterSGD (n = 39)RPM (n = 39)P
Respiratory gating accuracy (dCycle)
 Inhalation peak detection (%)100.0 (86.3–102.1)92.0 (26.7–101.0)<0.0001
 Time lag (ms)25.0 (5.7–146.4)285.4 (137.7–595.5)<0.0001
 Time lag shift (classes) (dtSGD)<0.0001
  <100 ms35 (89.7%)0 (0.0%)
  ≥100 ms4 (10.3%)39 (100.0%)
Deviation of end-expiration baseline8.6 mL (−2.5–53.3)18.6 mm (−17.9–342.2)0.0018
Gated BTV
 Gated BTV availability0.1250
  No1 (2.6%)5 (12.8%)
  Yes38 (97.4%)34 (87.2%)
 BTV (mL)7.2 (0.2–188.0)5.4 (0.8–167.0)0.1767
Gated SUVmax (g/mL)2.8 (1.0–43.1)2.0 (0.9–19.6)0.1966
  • Qualitative data are expressed as numbers followed by percentages in parentheses; continuous data are expressed as median followed by range in parentheses.