title: Response to letter by Doss: addition of diagnostic CT scan does not increase the cancer risk in patients undergoing SPECT studies.
authors.affiliation: Department of Medical and Occupational Radiation Protection, Federal Office for Radiation Protection, Neuherberg, Germany, gbrix@bfs.de.
authors.forename: Gunnar
authors.initials: G
authors.lastname: Brix
authors.forename: Elke A
authors.initials: EA
authors.lastname: Nekolla
mesh_terms: D006801:Humans; D064847:Multimodal Imaging / Q000379:methods*; D011829:Radiation Dosage; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics*; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D019275:Radiopharmaceuticals