Sono elastography meeting pavia 2011 may 29-30 - presentation of dr. masciotra
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Transcript of Sono elastography meeting pavia 2011 may 29-30 - presentation of dr. masciotra
Thyroid round table
Dr. Antonio Pio Masciotra
Campobasso
THE HISTORY OF SONO-ELASTOGRAPHY
Strain Shear wave
STRAIN with different compressions
Inhomogeneous elasticity Uniform low elasticity
SHEAR WAVENormal gland 8.29 kPa
Nodule 8.46 kPa
Normal gland 1.66 m/sec
Nodule 1.68 m/sec
Strain Shear wave
Soft or Hard ?STRAIN
Mainly ‘soft’ thyroid nodule
SHEAR WAVE
Mainly ‘hard’ thyroid nodule
Hard or Soft?Shear wave
kPa 65.87
Shear wave
3.69 m/sec
Are our measurements really indicative of tissue elasticity values?
QA sono-elasticitography phantom
We need to have standards of unity measures
BACKGROUND
• Material : Zerdine®• Speed of sound : 1545 m/s ± 10
m/s• Attenuation Coefficient : 0.50 dB/cm-MHz
LESIONI
• Material : Zerdine® • Attenuation Coefficient : 0.50 dB/cm-MHz
ELASTICITY
• Background: 25 kPa• Lesion Type I: 08 kPa • Lesion Type II: 14 kPa • Lesion Type III: 45 kPa • Lesion Type IV: 80 kPa
Different reference values in quantification and staging of hepatic fibrosis
Aims of elastography
Correct tissue elasticity quantification
Identification of ‘cut off’ elasticity values for correct diagnosis of diffuse and
focal diseases
SO WE NEED TO HAVE STANDARDS BOTH IN
TECHNIQUES OF ACQUISITION AND IN THE
MEASUREMENTS
Thanks to my Technicians
Mr. Nicolino Spina and
Mrs. Carmela Leccese
By
Dr. Antonio Pio Masciotra
Campobasso-Molise- Italy
To
ZAPRAD