Research Article

Attenuation Correction for Small Animal PET Images: A Comparison of Two Methods

Table 1

Density and attenuation coefficient used to calibrate the CT scanner. Data were calculated by Hubbell and Seltzer and were published by the National Institute of  Standards and Technology [26].

MaterialDensity ( )Attenuation coefficient at 511 keV (cm−1)

Air0.0010
Polyethylene0.9300.0925
Polystyrene1.0600.0994
Water1.0000.0969
Acrylic1.1900.1120
Polytetrafluoroethylene (Teflon)2.2500.1886
Aluminum2.6990.2280