CV DAY 6

Q1.Thallium scan radiation dose?

Table 1

Doses in cardiology

Examination	Effective dose (mSv)	Equivalent n. of chest x-rays
CONVENTIONAL RADIOLOGY
♣ Chest x ray (single postero-anterior)	0.02	1
NUCLEAR MEDICINE
♣ Tc-99 m tetrafosmin cardiac rest-stress (10 mCi+30 mCi)*	10.6	530
♣ Tc-99 m sestamibi cardiac 1-day rest-stress (10 mCi+30 mCi)*	12	600
♣ Tc-99 m sestamibi cardiac 2-day stress-rest (30 mCi+30 mCi)*	17.5	775
♣ Tl-201 cardiac stress and reinjection (3.0 mCi+1.0 mCi)*	25	1500
♣ Dual isotope cardiac (3.0 mCi Tl201 + 30 mCi Tc-99 m)*	27	1600
64-Slice CARDIAC COMPUTED TOMOGRAPHY
♣ ECG pulsing, no aorta**	9	450
♣ No ECG pulsing, yes aorta**	29	1450
INTERVENTIONAL RADIOLOGY
♣ Conventional rhythm device***	1.4	70
♣ Cardiac resynchronization device***	5.5	275
♣ Cerebral angiography ***	1.6–10.6	80–530
♣ Coronary angiography ***	3.1–10.6	155–555
♣ Abdomen angiography ***	6–23	300–1150
♣ Peripheral angiography***	2.7–14	135–700
♣ Coronary angioplasty ***	6.8–28.9	340–1445
♣ Peripheral angioplasty***	10–12	500–600
♣ Radiofrequency ablation***	17–25	850–1250
♣ Valvuloplasty***	29	1450

• Seattle to Portland: 3 mrem per 100 block hours
• New York to Chicago: 39 mrem per 100 block hours
• Los Angeles to Honolulu: 26 mrem per 100 block hours
• London to New York: 51 mrem per 100 block hours
• Athens to New York: 63 mrem per 100 block hours
• Tokyo to New York: 55 mrem per 100 block hours