Radiographic Tomosynthesis: Optimization of Acquisition Parameters
M Flynn1*, (1) Henry Ford Health System, Detroit, MITU-A-217A-1 Tuesday 8:00:00 AM - 9:55:00 AM Room: 217A
Radiographic tomosynthesis is currently implemented with systems that obtain multiple radiographic projections in a linear motion about a rotation axis. The reconstructed images have anisotropic properties that depend on geometric factors involving the size and direction of the angular segment, the height of the rotation axis and the number of views acquired. In particular, it is important to consider the direction of the acquisition in relation to the shape of the tissues being examined. In relation to computed tomography, the radiographic factors and irradiated regions of the tomosynthesis examination provides for a reduction is dose and the high resolution of the tomosynthesis detector provides for improved resolution. Factors influencing the specification of these acquisition parameters will be reviewed and illustrated with clinical tomosynthesis examples.
1. Appreciate the importance of scan direction in relation to tissue morphology.
2. Understand how tomosynthesis images can have better resolution for lower dose than computed tomography images. But also appreciate that tomosynthesis does not provide isotropic, three dimensional images with quantitative values.
3. Learn guidelines for setting the radiographic factors of tomosynthesis studies.