1. Stark DD, Bradley WG (1999) Magnetic resonance imaging, 3rd edn. C.V.Mosby, St-Louis, p 44
2. Bushberg JT (2012) The essential physics of medical imaging. Wolters Kluwer Health/Lippincott Williams & Wilkins, Philadelphia
3. Hashemi RH, Bradley WG, Lisanti CJ (2010) Ovid Technologies Inc. MRI the basics. Lippincott Williams & Wilkins, Philadelphia, p ix, 385 p
4. Caravan P (2006) Strategies for increasing the sensitivity of gadolinium based MRI contrast agents. Chem Soc Rev 35:512–523
5. Caravan P, Ellison JJ, McMurry TJ, Lauffer RB (1999) Gadolinium(III) chelates as MRI contrast agents: structure, dynamics, and applications. Chem Rev 99:2293–2352