New Image Contrast Method in Magnetic Resonance via Ultrasound

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New Image Contrast Method in Magnetic Resonance
via Ultrasound

• Marcus Radicke, Bernd Habenstein, Meinert
  Lewerenz, Ole Oehms, Sarah Wrede
• and
• Karl Maier

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Spin Echo Sequence
Spin Echo Sequence
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Outline Theory Tomograph Resumé
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Encoding
Slice Selection
Phase Encoding
Frequency Encoding
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Outline Theory Tomograph Resumé
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Weighting
T1
T2
Proton Density
Outline Theory Tomograph Resumé
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Ultrasound
US Theory
Excess Pressure
Acoustic Radiation Pressure
Characteristic Acoustic Impedance
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Outline Theory Tomograph Resumé
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US Diagnostics
US Image of a Kidney
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Outline Theory Tomograph Resumé
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The Set-Up
Outline Theory Krümel Tomograph
Resumé
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Attenuation
Echo Amplitude
US Frequency 18,355MHz Larmor Frequency
18,365MHz
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Outline Theory Tomograph Resumé
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Outline
Krümel Nouri ElMiladi, Bernd Habenstein,
Christian Höhl, Jessica Mende, Maurice
Schlichtenmayer and Karl Maier
Tomograph Bernd Habenstein, Meinert Lewerenz,
Ole Oehms, Marcus Radicke, Sarah Wrede and Karl
Maier
Outline Theory Tomograph Resumé
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Tomograph
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Outline Theory Tomograph Resumé
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US Emitter
The Set-Up
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Outline Theory Tomograph Resumé
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Acoustic Radiation Pressure
Liquid
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Outline Theory Tomograph Resumé
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Acoustic Radiation Pressure II
Tissue
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Outline Theory Tomograph Resumé
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Diffusion Weighting
Diffusion Weighting
Gx
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Outline Theory Tomograph Resumé
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Sound Reflection
Measurements I
Nov. 06
TE155ms, TR5700ms, Frequency9,41MHz Se
quence epi2d_diff_ro.
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Outline Theory Tomograph Resumé
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Different Viscosities
Measurements II
-6dBm ? 0,33W/cm²
TE106ms, TR3500ms, Frequency9,41MHz. Aug. 06
Outline Theory Tomograph Resumé
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Biological Tissue
Measurements III
US Amplitude -3dBm, Pulse Length 12ms,
Frequency 4,77MHz. TR123ms, TE12,1ms.
March 07
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Outline Theory Tomograph Resumé
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Biological Tissue
Measurements IV
US Amplitude -3dBm, Pulslength 12ms,
Frequency 4,77MHz. TR123ms, TE12,1ms.
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Outline Theory Tomograph Resumé
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Flame
Gradient Echo Sequence (T1 Weighting)
TR100ms TE30ms Layer Thickness 4mm FoV
100 x 100 US Pulse 4ms after 90 Pulse
Amplitude -10dBm
May 07
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Outline Theory Tomograph Resumé
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Resumé

• Interesting and Useful New Diagnostic
  Possibilities Through The Combination of US and
  MRT
• New contrasts
• Viscosity is visualisable
• Sense of touch inside the body
• ? New Diagnostic Prospects

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Outline Theory Tomograph Resumé
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Varying the US Amplitude
Measurements I
Jul. 06
-6dBm ? 0,33W/cm²
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Outline Theory Krümel Tomograph
Resumé
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Outline - Krümel
Krümel
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Gradient Echo Sequence (T1 Weighting)
Outline
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What is the Goal?
Veränderung der Relaxationszeiten durch
nanopartikel
Resonante Effekte
Outline Theory Krümel Tomograph
Resumé
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Tomograph
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Outline Theory Krümel Tomograph
Resumé
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Sketch of the Circuit
The Set-Up III
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Outline Theory Krümel Tomograph
Resumé
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Impedance Transitions
Measurements IV
Nov. 06
TR5600ms TE121ms, US-Amplitude-7dB,
Frequenz9,41MHz.
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Outline Theory Krümel Tomograph
Resumé
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Diffusion Weighting
Sequence epi2d_diff_ro
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Outline Theory Tomograph Resumé