<prompt> Radiation exposure occurs in all exceptCT Scan, PET scanMRIFluroscopyPlain X-Ray  <response>: B i.e. MRI Radiography use X-rays, which are ionizing radiation.Q Thermography or thermal imaging is a type of infrared imagine. Thermographic cameras detect radiation in the infrared range of the electromagnetic spectrum roughly 900-14,000 nanometer or 0.9-14 um MRI USG has no radiation riskQ. 