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