TABLE 3

Estimates for Operator-Received Doses Caused by Different Radioisotopes for Coronary Radiation Therapy: Comparison with Fluoroscopy

	Source activity (GBq)	γ-Energy (keV)	Quality of primary radiation	Dwell time (min)	Operator absorbed dose (μSv)
Positron emitter	1.85	511	β+	4	6
¹⁸⁸Re	1.85	172	β−, γ	4	2
¹⁹²Ir	7.4	380	γ	30	195*
X-ray (PTCA)^†	—	—	X-ray	Not reported	50–160

↵* Measured at neck collar level for coronary angiography, including single-vessel angioplasty (15).
↵† Dose calculated under assumption that operator would remain beside patient during entire dwell time (not current practice).