TABLE 1

Patient Groups for Adapted Intravenous Contrast Injection Protocols and Parameters for Intravenous Contrast Injection

Group	Protocol
Group		A	B	C	D
Descriptor	Nonenhanced	Standard	Extended	Modified
Patients	10	10	10	10
Male/female	5/5	6/4	6/4	5/5
Mean age* (y)	61 ± 14	61 ± 12	60 ± 7	62 ± 10
Mean body mass index*	24 ± 4	24 ± 5	23 ± 4	25 ± 4
Intravenous contrast administration
Intravenous contrast	No	Yes	Yes	Yes
Contrast material		Xenetix 300	Xenetix 300	Xenetix 300
Phase		Dual	Triple	Dual
Total contrast volume (mL)		140: 90, 50	170: 90, 40, 40	140: 80, 60
Flow rate (mL/s)		3, 1.5	3, 2, 1.5	3, 1.5
Delay (s)		30	30	50
Scan direction	Craniocaudal	Craniocaudal	Craniocaudal	Caudocranial