GRATING-BASED DIFFERENTIAL PHASE CONTRAST IMAGING

摘要

An imaging system (200) is configured for grating-based DPCI. The imaging system includes a rotating gantry (204) that rotates around an examination region, a radiation source (208), supported by the rotating gantry, that emits radiation that traverses the examination region, a detector array (212), supported by the rotating gantry, that detects radiation that traverses the examination region, and an interferometer, supported by the rotating gantry, which includes a source grating (214), a phase grating (218), and an absorber grating (220). At least one of the phase grating or the absorber grating continuously translates with respect to the other during an integration period and the detector generates and outputs an electrical signal indicative of the detected radiation, wherein the electrical signal includes an absorption component, a coherence component and a phase component.

主权项

1. An imaging system configured for grating-based DPCI, comprising:
a rotating gantry rotatable around an examination region; a radiation source, supported by the rotating gantry, configured to emit radiation that traverses the examination region; a detector array, supported by the rotating gantry, configured to detect radiation that traverses the examination region; and an interferometer, supported by the rotating gantry, including:
a source grating,a phase grating, andan absorber grating, wherein at least one of the phase grating or the absorber grating are configured to continuously translate with respect to the other during an integration period and the detector is configured to generate and output an electrical signal indicative of the detected radiation, wherein the electrical signal includes an absorption component, a coherence component and a phase component.