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Cardiac and pulmonary tissue mean CT numbers and corresponding linear attenuation coefficients.
| Mean CT number (HU) | Linear attenuation coefficienta (cm−1) | ||
|---|---|---|---|
| Phantom | 162 | 0.2637 | |
| Cardiac tissue | In vivo inspiration | 35 | 0.2348 |
| In vivo expiration | 37 | 0.2353 | |
| Phantom | −844 | 0.0354 | |
| Pulmonary tissue | In vivo inspiration | −827 | 0.0393 |
| In vivo expiration | −640 | 0.0817 |
Using Eq. A3 in the Appendix.
