Effects of iodinated contrast on various magnetic resonance imaging sequences and field strength: Implications for characterization of hemorrhagic transformation in acute stroke therapy

Table 1 Relaxation times of iodinated contrast material, blood and physiologic saline at 1.5T¹

	T1 relaxation time (ms)	T2 relaxation time (ms)
Iodinated contrast (Iopamidol 300 mg/L)2	Approximately 1100	Approximately 80-100
Blood3	1200-1400	290-320
Physiologic saline4	Approximately 3000	Approximately 1800

¹There is notable difference between the relaxation times (RT) for physiologic saline and iodinated contrast (ICM) or blood. While ICM and blood have closer and similar RT;

²Modified from Hergan et al[2], T1 values represent time after correction for known 25%-40% increase with every doubling of the magnetic field strength;

³Expected RT at 95% oxygen level[3,4];

⁴References[2,5].