TABLE 3

Contrast and RMS Results for Images Without Attenuation Correction

System 1System 2System 3System 4System 5
ProtocolContrast (%)RMS (%)Contrast (%)RMS (%)Contrast (%)RMS (%)Contrast (%)RMS (%)Contrast (%)RMS (%)
Brain (CO)51.65 (z = 1.46)10.48 (z = 1.46)67.41 (z = 1.28)19.87 (z = 1.28)48.28 (z = 1.45)9.28 (z = 1.45)52.6316.2232.17 (z = 1.46)8.36 (z = 1.45)
Brain (NCO)49.195.3226.635.166015.81
Brain (NCO) (zoom)53.26 (z = 1.46)11.02 (z = 1.46)41.89 (z = 1.45)10.21 (z = 1.45)
General SPECT (CO)46.6710.5432.484.3656.7611.5557.1414.2939.139.33
General SPECT (NCO)54.3510.4367.4710.9867.3914.74
  • CO = circular orbit; NCO = noncircular orbit.