new topics in the clinical use of sonoelastography antonio pio masciotra campobasso – molise –...
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New topics in the clinical use of Sonoelastography
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
Echogenicity and Elasticity of tissues are quite different features!
Almost isoechoic tissues can have very different elasticity (12,0 kPa in normal parenchima Vs 21,6 kPa inside the nodule).
Isoelastic tissues (14,5 kPa) can have different echogenicity (highest in normal parenchima and intermediate to low inside the nodule).
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
New topics in the clinical use of
Sonoelastography
Echogenicity and Elasticity of tissues are quite different features!
Almost isoechoic tissues can have very different elasticity (from 69,8 kPa to 147 kPa)
like in this breast cancer.
Also stiffest areas in this cancer (113,5 kPa to 147,1 kPa) can have different echogenicity (at the boundary between the nodule and surrounding tissue).
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
New topics in the clinical use of
Sonoelastography
Echogenicity and Elasticity of tissues are quite different features!
Almost isoechoic tissues can have very different elasticity (from 14,2 kPa to 147 kPa) like in this patient who has a fibroadenoma in the right breast
and a cancer in the left breast.
Then the feature ‘Echogenicity’ has not correlations to the feature ‘Elasticity’
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
New topics in the clinical use of
Sonoelastography
Feature (kPa) Fibroadenoma Cancer
Mean stiffness 37,3 95,2
Maximum stiffness 57,1 147,1
Minimum stiffness 14,2 69,8
Standard Deviation 8,0 17,3
Elasticity of tissues is a very important feature!
We well know that cancer and surrounding desmoplastic reaction tissue are not only far stiffer than fat (from 3,4 to 4,3 times) but also large more inhomogeneous.
This latter feature is expressed by the higher Standard Deviation found in the stiffness’ values in the cancer and surrounding tissue compared to the ones found in fat tissue. It’s interesting that the features showing the most significative differences between cancer and fat are the Standard Deviation and its ratio.
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
New topics in the clinical use of
Sonoelastography
Feature (kPa) Cancer Fat Ratio
Mean stiffness 96,7 23,4 4,2
Maximum stiffness 147,1 39,6 3,7
Minimum stiffness 45,6 13,4 3,4
Standard Deviation 20,2 4,7 4,3
We well know that usually fibroadenoma is somewhat stiffer than fat (from 3,4 to 4,3 times) but also little more inhomogeneous.
This latter feature is expressed by the higher Standard Deviation found in the stiffness’ values in the fibroadenoma compared to the ones found in fat tissue. It’s interesting that the more significative feature in fibroadenoma Vs fat comparison is the minimum stiffness (more than 9 times higher in the fibroadenoma).
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
New topics in the clinical use of
Sonoelastography
Feature (kPa) Fibroadenoma
Fat Ratio
Mean stiffness 39,3 12,2 3,2
Maximum stiffness 50,4 20,2 2,5
Minimum stiffness 30,4 3,2 9,5
Standard Deviation 4,7 2,5 1,9
Echogenicity and Elasticity of tissues are quite different features!
In the same image of the cancer 3 different ROIS of isoechoic tissue are selected :
the one in the circle is relatively far from the cancer, while the two within traces are near the cancer. We can see that the fibrous tissue around the cancer is stiffer than the fibrous tissue far from the cancer.
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
New topics in the clinical use of
Sonoelastography
Feature (kPa) Circle ROI
Trace ROIS
Ratio
Mean stiffness 24,9 62,875,3
2,53,0
Maximum stiffness 48,3 146,8105,5
3,02,2
Minimum stiffness 12,0 29,238,9
2,43,2
Standard Deviation 7,6 26,014,4
3,41,9
CONCLUSIONS
Sono-Elastography adds valuable information to the study of all organs, potentially resulting in “a virtual biopsy” .
This final aim will be achieved when further improvement of Shear Wave Elastography technology (the only actually capable to quantify elasticity or stiffness) will give us the right consistency of the quantitative measurements of tissue elasticity that up todate is still lacking.
Hence the RSNA initiative of ‘Quantitative Imaging Biomarkers Alliance’ applied to Sono-Elastography too.This means that if the intrinsic elasticity of the testis is 2 kPa all the measurements have to give this value, not depending on the probe’s frequency or on other variables.
When this requirement will be accomplished we’ll can really establish the cutoff value between normal and abnormal tissues both in focal and in diffuse diseases.Therefore we’ll can rely on it at same extent we actually rely on the use a thermometer to check the behavior of the fever during an infection (if it’s responding to the treatment).
Then let’s go on!Lessons need to be drawn from two great men of the past who had the
vision to preparing for the future.
Galileo Galilei
"Any problem that wants
to be solved starts with curiosity."
"Knowing is not enough, we must apply.
Willing is not enough, we must do."
Johann Wolfgang von Goethe
New topics in the clinical use of Sonoelastography
Antonio Pio MasciotraCampobasso – Molise – Italy
Website www.masciotra.net
YouTube channelhttps://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ