Spatial resolution of x-ray tomosynthesis in relation to computed tomography for coronal/sagittal images of the knee

摘要: We consider in this report, a tomosynthesis (TS) system utilizing recently developed Selenium flat panel detector (Shimadzu Safire II) capable of acquiring 30 pulsed frames per second (fps) with precise geometric registration to moving gantry. The reconstructed TS resolution achieved is reported relation the obtained modern volumetric computed tomography (vCT) systems. Computed assessed using sphere phantom. To describe coronal/sagittal re-formatted planes, we average transverse and axial response express typical vCT performance as 1.00 mm (FWHM PlSF) 0.83 cycles/mm (10% MTF). Tomosynthesis wire images, use FWHM LSF frequency at 20% peak spatial 2.41 LSF) 2.62 (20% Peak). Cadaver images confirm that about 3 times better than for On other hand, slice sensitivity larger LSF).