Radiation Dose Optimization in Interventional Cardiology: A Teaching Hospital Experience

Table 5

Quantitative image quality results using the CIRS model 901 20 cm phantom for standard NEMA measurements.

		Phase 1		Phase 2		Phase 3		Phase 4		Phase 5
		Fluoroscopy	Acquisitions	Fluoroscopy	Acquisitions	Fluoroscopy	Acquisitions	Fluoroscopy	Acquisitions	Fluoroscopy	Acquisitions
X-ray parameters	kVp	81	70	78	70	76	70	76	70	76	71
	Tube current (mA)	6.5	342	5	342	3	342	3	373	3	400
	Dose setting	Normal	Normal	Low	Normal	Low	Normal	Low	Normal	Low	Low
	Frame rate	7.5	15	7.5	15	5	15	5	10	5	10
	Added filteration	Al 2.0 + Cu 0.1	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 2.0 + Cu 0.1
Static image quality	Line pairs	1.8	2.2	1.8	2.2	1.4	2.2	1.4	2	1.4	2
	Iodine group 1	6	8	6	8	6	8	6	6	6	8
	Iodine group 2	4	6	0	6	0	6	0	6	0	6
	Iodine group 3	0	0	0	0	0	0	0	0	0	0
	Iodine group 4	0	0	0	0	0	0	0	0	0	0
	Air cylinders	4	4	4	4	4	4	4	4	4	4
	Aluminum cylinders	4	4	4	4	4	4	4	3	4	3
X-ray parameters	kVp	75	71	77	71	77	71	77	72	77	73
	Tube current (mA)	5	432	5.7	432	3	432	3	400	3	399
	Dose setting	Normal	Normal	Low	Normal	Low	Normal	Low	Normal	Low	Low
	Frame rate	7.5	15	7.5	15	5	15	5	10	5	10
	Added filteration	Al 2.0 + Cu 0.1	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 1.0 + Au 0.01	Al 1.5 + Cu 0.6	Al 2.0 + Cu 0.1
Temporal image quality	Moving wires	3	4	3	4	3	4	3	4	3	4