1. A data detection device configured for use in combination with both a nuclear imaging apparatus and a magnetic resonance imaging (MRI) apparatus, the data detection device comprising: nuclear detector electronics configured to detect nuclear radiation and generate nuclear image data; wherein the nuclear detector of the nuclear detector electronics, is one of a positron emission tomography (PET) detector device or a single photon emission computed tomography (SPECT) detector device; a magnetic field detector configured to detect a temporally varying magnetic field generated by the MRI apparatus, wherein the magnetic field detector is mounted with the nuclear detector electronics; and a timestamping unit configured to generate timestamps for at least the nuclear data that are based on a common clock and the detected temporally varying magnetic field that was generated by the MRI apparatus.