MRI 영상 이미지

T1강조영상

• 어두운 부분

  • increased water, as in edema, tumor, infarction, inflammation, infection, hemorrhage (hyperacute or chronic)
  • low proton density, calcification
  • flow void

• 밝은 부분

  • fat
  • subacute hemorrhage
  • melanin
  • protein-rich fluid
  • slowly flowing blood
  • paramagnetic substances: gadolinium, manganese, copper
  • calcification (rarely)
  • laminar necrosis of cerebral infarction

• 영상

• 

T2강조영상

• 밝은 부분

  • increased water, as in edema, tumor, infarction, inflammation, infection, subdural collection
  • methemoglobin (extracellular) in subacute hemorrhage

• 어두운 부분

  • low proton density, calcification, fibrous tissue
  • paramagnetic substances: deoxyhemoglobin, methemoglobin (intracellular), iron, ferritin, hemosiderin, melanin
  • protein-rich fluid
  • flow void

• 영상

• 

T1영상과 T2영상의 비교

• SE 방법으로 얻은 대표적인 뇌의 자기공명영상: T1 강조영상(왼쪽), T2 강조영상(오른쪽)

• 　

• TOF 기법을 사용하여 얻은 동맥류 기형환자의 뇌혈관영상

자기공명 혈관조영술(MRA)

• Head MR Angiography is usually done without contrast. The technique is completely noninvasive and provides a good visual aid.

• Neck MRA in this case has been performed with contrast. It covers from the aortic arch to the Circle of Willis.

•