Evaluation of the effect of geometry for measuring section thickness in tomosynthesis.

Our aim in this study was to evaluate the effect of geometry for measuring section thickness in tomosynthesis by using a metal bead device (bead method). Tomosynthesis images were obtained from two types of tomosynthesis equipment, Safire17 (ST, Shimadzu, Kyoto, Japan) and XR650 (GT, GE Healthcare, Milwaukee, WI). After tomosynthesis radiography with each device, the bead tomosynthesis images were obtained by image reconstruction.

[Comparison of FBP and ML-EM reconstruction used by simulation data; effect of the projection number for the SPECT image].

Purpose: The influence of the numbers of projection of SPECT exerting on a re-constructed image cannot be strictly evaluated by phantom studies. Therefore, we compared re-constructed images of the FBP method and the ML-EM method by using simulation data.

Methods: Simulation data was entered in the image processing software, and the projection data that changed the numbers of projection was made.

[Physical imaging properties of a flat panel X-ray detector system].

We report the physical imaging properties of a flat panel detector (FPD) designed for radiographic imaging applications (Revolution XQ/i digital chest imaging system, G.E. Medical Systems).