Blooming artifact

Blooming artifact is a susceptibility artifact encountered on some MRI sequences in the presence of paramagnetic substances that affect the local magnetic milieux. Most affected sequences are T2*, and in many instances they are designed to exploit this phenomenon to make certain pathologies more conspicuous. As such although it is an artifact, it is used deliberately to improve detection of certain small lesions, much as the T1 shortening effects of low concentration Gadolinium are used to detect contrast enhancement. 

The term 'blooming' refers to the fact that lesions appear larger than they actually are. 

One of the most powerful and widely available sequences which maximizes blooming to great effect is susceptibility weighted imaging (SWI)

Blooming is seen surrounding a number of compounds: 

MRI physics
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rID: 46216
Section: Physics
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