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Cardiac MRI

出版于 星期天, 2009年 二月 15日 由 Denis Hoa

内容表

Cardiac MRI

  1. Introduction
  2. Cardiac MRI sequences basics
  3. ECG gating
  4. Cardiac MRI planes
  5. Study of cardiac morphology
  6. Evaluation of cardiac function, tagging, stress MRI
  7. Phase contrast velocity imaging
  8. Myocardial perfusion
  9. Myocardial delayed enhancement MRI
  10. Coronary MRA

學習目標

Learning objectives

After reading this chapter, you should be able:

  • To list the main difficulties in cardiac MRI
  • Present the methods to overcome these
  • Explain the principles of ECG gating
  • Describe the techniques and results of:
    • Morphological and functional cardiac exploration
    • Cine phase-contrast velocity mapping
    • Myocardial perfusion and late enhancement imaging
    • Coronary MR angiography

重點

Application Sequence Gating Breath. Prep Inj. Blood Contr.
Morphology Fast SE

with Dark blood preparation 		P H DB – ● T1, T2
Morphology Ultrafast SE

with Dark blood preparation 		P L/A DB – ● T1, T2
function Balanced steady state GE cine sequence

± tagging ± stress 		R/P H/F ± tagging ± stress

(Dobu tamine) 		○ T2/T1
Flow Phase contrast R/P H PE – ● +

○ – 		Speed (phase)
Perfusion GE-EPI, ultrafast GE or GE with balanced gradients and preparation by saturation recuperation (SR) P H/C/F SR Gado

1st p.

± stress 		○ T1
Delayed enhancement IR/PSIR – ultrafast GE

with TI adapted to suppress the signal from the healthy myocardium (IR) or in PSIR technique 		P H IR

PSIR 		delayed Gado ○ Healthy myo cardium,

T1

 

Gating: P = prospective, R = retrospective

Breathing: H = Breath-hold, F = Free breathing, C = Respiratory compensation

Preparation: DB = Dark Blood, PE = Phase encoding, SR = Saturation Recuperation, IR = Inversion recuperation, PSIR = Phase Sensitive Inversion Recovery

Injection: Dobu = Dobutamine, Adenos. = Adenosine, Gado = Gadolinium chelates

Blood signal: ● = dark blood, ○ = bright blood, ● + = flow moving toward the observer, in black, ○ – = flow moving away from the observer, in white



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參考資料

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