title: RADIATION EXPOSURE TO OPERATORS PERFORMING PHARMACOLOGIC STRESS TESTING IN 99mTc MYOCARDIAL PERFUSION IMAGING: A PROSPECTIVE STUDY.
abstract: This prospective study investigated radiation exposure dose (RED) to main operator (MO) and supervisory operator (SO) performing dypiridamole stress testing in a 1-d rest/stress 99mTc tetrofosmin single-photon emission computed tomography (SPECT) of consecutive 42 patients. MO was instructed to be close to the patients during the entire procedures including the vasodilator and radiotracer injection. SO mainly recorded the data on the procedures apart from the patients. RED, procedure time (PT) and internal radioactivity (IR) of patients were measured before and after a secondary tracer injection for stress SPECT, respectively. RED was significantly greater to MO than to SO (6.2 ± 2.7 vs 2.5 ± 2.1 μSV per stress procedure, p < 0.0001). Multivariate analyses revealed that IR and PT were significantly independent factors to predict RED to both operators. Operators performing pharmacologic stress procedure should be aware that IR and PT are independent factors for RED in 99mTc myocardial perfusion imaging.
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Tadaki
authors.initials: T
authors.lastname: Nakahara
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Iwabuchi
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Mari
authors.initials: M
authors.lastname: Katagiri
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Yohji
authors.initials: Y
authors.lastname: Matsusaka
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Itoh
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Ogata
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Jinzaki
mesh_terms: D000368:Aged; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D055414:Myocardial Perfusion Imaging; D016273:Occupational Exposure / Q000032:analysis*; D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D011446:Prospective Studies; D000069079:Radiation Exposure / Q000032:analysis*; D019275:Radiopharmaceuticals; D013997:Time Factors; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*
chemical_list: D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D019275:Radiopharmaceuticals; C078700:technetium tc-99m tetrofosmin