Figure 1
From: Tomographic in vivo microscopy for the study of lung physiology at the alveolar level
Influence of the timing of the single-projection exposure within the cardiac cycle as well as the correction for irregular heartbeat periods during a breath-hold phase under continuous rotation. Tomographic slices with approximately 450 angular projections, 2.9 × 2.9 μm2 pixel size, and 3 ms single-projection exposures are shown when projections are acquired at a 50 ms delay (a) and at a 150 ms delay (b) from the R-wave. Finally, since the angles of the tomographic projections are not sampled in an equiangular way, an artifact-free CT reconstruction of the same dataset (b) is obtained only after utilizing the tomographic angle of each projection in the CT reconstruction step (c).
