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Inversion Recovery Inversion Recovery • Key Features – Signal Preparation Block • 180° RF Inversion Pulse • TI – Inversion Time [ms] – Signal Measurement Block • Spin Echo or Gradient Echo • Signal during imaging is dependent on – T1 and TI • TR is typically long (>2000ms) – Better for 2D sequences • Can null a single T1 species if – TI=ln(2)T1=0.69T1 • Can be used for quantitative T1 mapping 62 Radiology Inversion Pulses Inversion Recovery Radiology Radiology
Radiology 180° Inversion Recovery Contrast 180° Contrast Relax Imaging TI TR Radiology 180° Inversion Recovery TE 180° 90° 180° Contrast TR TI Relax Contrast Radiology 180° Inversion Recovery 180° 90° 180° TR TI Mz Contrast Relax TE Contrast Radiology 180° Inversion Recovery 180° 90° 180° TR TI Mz Contrast Relax TE Contrast
Page 1 and 2: Introduction to MRI Daniel B. Ennis
Page 3 and 4: Bulk Magnetization Zeeman Splitting
Page 5 and 6: Dipoles to Images Coils µ Magnetic
Page 7 and 8: Gradients MRI Instrumentation • G
Page 9 and 10: What is k-space 1D k-space • Spat
Page 11 and 12: Center What is k-space Contrast Wha
Page 13 and 14: 1952 Nobel Prize in Physics “for
Page 15 and 16: T2 Relaxation • Transverse or spi
Page 17 and 18: What are echoes What are echoes •
Page 19 and 20: Spin Echo Spin Echo RF 90° 180° R
Page 21: Spin Echo - Contrast Spin Echo - Va
Page 25 and 26: Basic Gradient Echo Sequence TR TE
Page 27 and 28: Spoiled GRE & Ernst Angle 90° 180

slides - Brainmapping.ORG

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