Table 4.
Dosimetric comparisons between Free Breathing (FB) and Deep Inspiratory Breath-hold (DIBH) scans (N = 31).
| PARAMETER | FB | DIBH | Δ (Difference) | Δ% (percentage of difference) | p value |
|---|---|---|---|---|---|
| Mean Heart dose (Gy) | 4.0 | 2.4 | −1.5 | −39.1 | 0.00 |
| Mean LAD dose (Gy) | 12.6 | 8.7 | −3.8 | −30.1 | 0.00 |
| Max Heart dose (Gy) | 39.4 | 31.5 | −7.8 | −19.8 | 0.00 |
| Max LAD dose (Gy) | 31.9 | 25.8 | −6.0 | −18.9 | 0.00 |
| Heart V5 (%) | 14.2 | 7.6 | −6.6 | −46.5 | 0.00 |
| Heart V10 (%) | 8.9 | 3.4 | −5.5 | −61.8 | 0.00 |
| Heart V30 (%) | 2.9 | 0.4 | −2.4 | −82.7 | 0.00 |
| LAD V5 (%) | 52.5 | 52.6 | 0.1 | 0 | 0.97 |
| LAD V40 (%) | 0.6 | 0.4 | −0.1 | −21.7 | 0.83 |
| Mean total lung dose (Gy) | 7.1 | 4.7 | −2.4 | –33.8 | 0.17 |
| Total Lung V5 (%) | 19.6 | 17.4 | −2.1 | −10.9 | 0.24 |
| Total Lung V12 (%) | 13.9 | 11.7 | −2.1 | −15.3 | 0.02 |
| Total lung V20 (%) | 11.1 | 9.1 | −1.9 | −17.4 | 0.00 |
| Mean Left Lung dose (Gy) | 10.2 | 9.2 | −1.0 | −9.9 | 0.03 |
| Left lung V5 (%) | 38 | 37 | −0.8 | −2.2 | 0.67 |
| Left lung V12 (%) | 27.6 | 24.9 | −2.7 | −9.7 | 0.05 |
| Left lung V20 (%) | 22.3 | 19.4 | −2.9 | −13.2 | 0.01 |
LAD- Left Anterior Descending Artery.