Frequency-Selective Computed Tomography: Applications During Periodic Thoracic Motion.

ABSTRACT: We seek to use computed tomography (CT) to characterize regional lung parenchymal deformation during high-frequency and multi-frequency oscillatory ventilation. Periodic motion of thoracic structures results in artifacts of CT images obtained by standard reconstruction algorithms, especially for frequencies exceeding that of the X-ray source rotation. In this paper, we propose an acquisition and reconstruction technique for high-resolution imaging of the thorax during periodic motion. Our technique relies on phase-binning projections according to the frequency of subject motion relative to the scanner rotation, prior to volumetric reconstruction. The mathematical theory and limitations of the proposed technique are presented, and then validated in a simulated phantom as well as a living po

SUBMITTER: Herrmann J 

PROVIDER: S-EPMC5639881 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature