Apparatus for inserting delay, nuclear medicine imaging apparatus, method for inserting delay, and method of calibration

摘要

An apparatus for inserting delay according to an embodiment includes a signal generating circuit, a plurality of carry elements, and a delay chain circuit. The delay chain circuit includes one or more delay modules selected from the plurality of carry elements, at least one feedback line connected between at least one of the delay modules and the signal generating circuit, and a plurality of enable inputs. Each of the plurality of enable inputs is provided in a respective one of the delay modules. The delay chain circuit is configured to generate an amount of delay based on a delay selection signal that is received at the enable inputs and that selects the amount of delay, and is configured to provide the selected amount of delay to the signal generating circuit, which is configured to incorporate the delay into the start signal.

主权项

1. A nuclear medicine imaging apparatus, comprising:
a counting information collection unit implemented by circuitry that collects counting information including detection time of radiation in detecting the radiation emitted from a nuclide administered to a subject; and a reconstruction unit implemented by circuitry that reconstructs a nuclear medicine image based on the counting information, wherein the counting information collection unit comprises:
a signal generating circuit configured to generate a start signal of a time-to-digital circuit (TDC) that measures the detection time of the radiation;a plurality of carry elements connected as a chain, each of the carry elements having an input to receive a stop signal; anda delay chain circuit including one or more delay modules selected from the plurality of carry elements, at least one feedback line connected between at least one of the delay modules and the signal generating circuit, and a plurality of enable inputs each provided in a respective one of the delay modules, wherein the delay chain circuit is configured to generate an amount of delay based on a delay selection signal that is received at the enable inputs and that selects the amount of delay, and is configured to provide the selected amount of delay to the signal generating circuit, which is further configured to incorporate the delay into the start signal.