Table 3.
Global and regional differences between cardiac uptake using the 68Ge rod source for attenuation correction (UpRRS) and the uptake computed using the three CT scans (equation 2). Negative values imply a value less than that obtained with the rotating rod source.
| Regional Uptake Bias (%)UpRRS as reference | UpCTEXPIR | UpCTMIDVOL | UpCTINSPIR |
|---|---|---|---|
| Global | −5.9 ± 8.2 (NS) | −12.3 ± 10.0 | −22.8 ± 11.2 |
|
| |||
| Apex | −1.5 ± 6.9 (NS) | −7.4 ± 13.7 | −15.1 ± 16.4 |
|
| |||
| Apical slice | |||
| Anterior | −3.0 ± 21.1 (NS) | −14.5 ± 27.3 (NS) | −32.5 ± 24.8 |
| Inferior | −8.6 ± 11.4 (NS) | −7.8 ± 2.9 | −14.0 ± 9.6 |
| Lateral | −3.8 ± 19.2 (NS) | −13.8 ± 17.0 (NS) | −30.5 ± 21.6 |
| Septal | −6.3 ± 6.7 | −5.0 ± 7.8 (NS) | −11.9 ± 7.4 |
|
| |||
| Mid slice | |||
| Anterior | −1.2 ± 18.1 (NS) | −9.1 ± 22.2 (NS) | −28.1 ± 20.0 |
| Inferior | −10.0 ± 7.3 | −16.3 ± 4.1 | −21.5 ± 11.2 |
| Lateral | −2.1 ± 18.5 (NS) | −11.6 ± 13.2 | −32.5 ± 19.0 |
| Septal | −7.9 ± 5.6 | −7.9 ± 3.9 | −13.2 ± 7.4 |
|
| |||
| Basal slice | |||
| Anterior | −2.5 ± 9.5 (NS) | −13.3 ± 13.3 | −22.1 ± 16.5 |
| Inferior | −12.4 ± 7.9 | −21.3 ± 10.6 | −23.0 ± 12.3 |
| Lateral | −2.9 ± 10.7 (NS) | −14.8 ± 12.9 | −28.9 ± 15.1 |
| Septal | −11.4 ± 5.7 | −15.6 ± 7.1 | −16.4 ± 8.7 |
All p<0.05 except when specified not significant (NS)