DATA ACQUISITION Russian patent published in 2015 - IPC G01T1/20 

FIELD: chemistry.

SUBSTANCE: invention relates to data acquisition and can be particularly used in computed tomography (CT). An imaging detector comprises a scintillator array (202); a photodetector array (204) optically interfaced with the scintillator array (202); a current-to-frequency converter (I/F) (314), which comprises an integrator (302) and a comparator (310) which converts, during the current integration period, charge which is output by the photodetector array (204) into a digital signal having a frequency which indicates the charge; a logic circuit (312) which establishes integrator (302) gain for the next integration period based on the digital signal for the current integration period, a reset switch (308) which resets the integrator (302) based on the gain established by the logic circuit (312), wherein the reset switch (308) comprises at least a first reset capacitor (402) with a first capacitance and a second reset capacitor (406) with a second different capacitance.

EFFECT: high spatial resolution.

13 cl, 10 dwg, 2 tbl