By Richard G. Barr
This functional consultant is a compilation of firsthand services from prime gurus world wide at the use of ultrasound elastography. The stiffness or softness of the imaged tissue derived from elastography presents exact radiologic prognosis for ailment tactics together with melanoma, irritation, and fibrosis. it truly is an efficacious and exact diagnostic imaging modality that is helping stay away from invasive biopsies.
The first chapters conceal simple basic ideas of elastography, with next chapters exploring pathology-specific usage. The authors hide the greatly verified and applied use of elastography for diffuse liver sickness, and illnesses of the breast andthyroid gland. additionally they speak about the aptitude merits and obstacles for the prostate, spleen, pancreas, kidneys, musculoskeletal procedure, salivary glands, lymph nodes, and testes. The e-book concludes with a bankruptcy on capability destiny functions of this ever-evolving technology.
- Discussion of key adjustments among pressure elastography and shear wave elastography by way of person organ systems
- Clinical pearls on the right way to adequately practice elastography and suggestions for warding off false-positive or false-negative results
- Case experiences elucidate the exact use of elastographic findings through particular pathology
- Illustrations within the breast and liver chapters reveal certain transducer techniques
- MRI elastography as an rising and secure evaluation device, essentially for the analysis of liver disorder, with emergent power for extra organs
This ebook presents key wisdom on visualizing quantifiable changes in tissue elasticity and employing this information to enhanced remedy suggestions for various pathologies. it's crucial interpreting for radiologists, sonographers, and imaging technicians.
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Extra info for Elastography: a practical approach
Two-Dimensional Shear Wave Elastography With 2D-SWE, the stiﬀness values over a large FOV are displayed in a color-coded map. An ROI can be placed over the area of interest and the stiﬀness value in either meters per second or kilopascals will be displayed. Since the ROI will contain multiple pixels, the results are usually displayed as the maximum stiﬀness value, the minimum stiﬀness value, the mean stiﬀness value, and the standard deviation for all the pixels in the ROI. Most studies have used the maximum stiﬀness value as the criteria to determine if a lesion is benign or malignant.
In: Wintrobe MM, Thorn GW, Adams RD, et al, eds. 7th ed. New York, NY: McGraw-Hill; 582–587  Barr RG. Sonographic breast elastography: a primer. J Ultrasound Med 2012; 31(5):773–783  Bamber J, Cosgrove D, Dietrich CF et al. EFSUMB guidelines and recommendations on the clinical use of ultrasound elastography. Part 1: Basic principles and technology. Ultraschall Med 2013; 34(2):169–184  Shiina T, Nightingale KR, Palmeri ML et al. WFUMB guidelines and recommendations for clinical use of ultrasound elastography: Part 1: basic principles and terminology.
One important factor in obtaining accurate measurements is the strength of the ARFI pulse. Like all other ultrasound pulses, the ARFI pulse can be attenuated, refracted, and reflected, weakening the strength of the pulse. The strength of the ARFI pulse is directly related to the degree of displacement of the tissues by the shear wave. A weaker ARFI pulse will result in a decrease in the signal to noise of the measurements of the shear wave and an increase in error in the shear wave measurement.