<prompt> Cardiotoxicity caused by radiotherapy chemotherapy is best detected byECHOECGRadionucletide ScanEndomyocardial Biopsy  <response>: D i.e. Endomyocardial Biopsy and CT cause fibrosis; which can be best diagnosed by seeing the tissue under microscope Endomyocardial Biopsy.Q IInd best answer is Radionucleotide scanQ. 