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Elastography: a practical approach by Richard G. Barr

By Richard G. Barr

This sensible advisor is a compilation of firsthand services from major professionals all over the world at the use of ultrasound elastography. The stiffness or softness of the imaged tissue derived from elastography presents actual radiologic prognosis for illness techniques together with melanoma, irritation, and fibrosis. it's an efficacious and actual diagnostic imaging modality that is helping steer clear of invasive biopsies.

The first chapters hide uncomplicated basic rules of elastography, with next chapters exploring pathology-specific usage. The authors conceal the broadly tested and applied use of elastography for diffuse liver illness, and ailments of the breast andthyroid gland. additionally they speak about the aptitude merits and barriers for the prostate, spleen, pancreas, kidneys, musculoskeletal procedure, salivary glands, lymph nodes, and testes. The ebook concludes with a bankruptcy on capability destiny functions of this ever-evolving technology.

Key Highlights

  • Discussion of key modifications among pressure elastography and shear wave elastography by means of person organ systems
  • Clinical pearls on how you can properly practice elastography and advice for fending off false-positive or false-negative results
  • Case stories elucidate the particular use of elastographic findings via particular pathology
  • Illustrations within the breast and liver chapters reveal unique transducer techniques
  • MRI elastography as an rising and secure evaluation instrument, basically for the prognosis of liver sickness, with emergent power for added organs

This booklet presents key wisdom on visualizing quantifiable changes in tissue elasticity and employing this information to more suitable therapy innovations for varied pathologies. it's crucial analyzing for radiologists, sonographers, and imaging technicians.

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Extra info for Elastography: a practical approach

Example text

The hepatitis C virus (HCV) and the hepatitis B virus (HBV) are leading causes of chronic liver disease. An estimated 130 to 150 million people have chronic hepatitis C infection worldwide. 1 In high endemic areas, where 3/4 of the world’s population live, 70 to 90% of the population becomes HBV-infected and 8 to 20% of those are HBV-carriers. 2 Nonalcoholic fatty liver disease (NAFLD) is a common clinical condition characterized by significant deposition of lipid droplets in the hepatocytes of individuals without a history of alcohol abuse.

Even when significant precompression is applied leading to a poor elastogram, the quality factor or compression bar can suggest a good elastogram was obtained. Usually a small amount of precompression (10–20%) is used to obtain B-mode images as it improves B-mode image quality. 4 Strain Elastography Using ARFI An ultrasound pulse can be reflected or absorbed (attenuated), or it can transfer its momentum (it can push). This transfer of energy causes tissue to move. Increased energy in the ultrasound beam creates increased force and hence movement.

This function is helpful in confirming the location of a lesion in the elastogram or in the B-mode image. The use of a copy or shadow function can help in confirming the location of a lesion noted on one image but not easily seen on the other. This function allows you to measure a lesion and have the measurement placed in the identical position in the other image. In this example, the dotted yellow line with the x’s is the actual measurements of the lesion. The dotted yellow line without the x‘s is the copied measurement from the other image.

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