By Richard G. Barr
"Elastography is a noninvasive imaging method that detects tumors in accordance with their stiffness in comparison to general tissue. It makes use of ultrasound expertise and will be played in the course of an ultrasound exam of the breast. it might dramatically lessen the variety of breast biopsies played. This booklet introduces the innovations of breast elastography by means of a close description for every of the techniques, highlighting their professionals and cons. this can be by means of a piece on easy methods to practice all the strategies. The 3rd part discusses the equipment of interpretation for every approach, and the ultimate part offers instances reviews highlighting the professionals and cons of every strategy and the way to prevent pitfalls in interpretation. it's written to attract the newbie in addition to the skilled user"--Provided by way of publisher. �Read more...
summary: "Elastography is a noninvasive imaging strategy that detects tumors according to their stiffness in comparison to general tissue. It makes use of ultrasound expertise and will be played in the course of an ultrasound exam of the breast. it may dramatically decrease the variety of breast biopsies played. This e-book introduces the ideas of breast elastography via a close description for every of the concepts, highlighting their professionals and cons. this can be via a bit on tips on how to practice all the options. The 3rd part discusses the equipment of interpretation for every process, and the ultimate part provides instances reports highlighting the professionals and cons of every approach and the way to prevent pitfalls in interpretation. it truly is written to attract the newbie in addition to the skilled user"--Provided by way of writer
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Additional info for Breast Elastography
The reference image was obtained with minimal precompression, whereas the other graphs were obtained with increasing amounts of precompression. Note that as precompression is applied the tissue displacement occurs sooner (increased shear wave velocity). (Reprinted with permission from Barr RG, Zhang Z. Effects of precompression on elasticity imaging of the breast: development of a clinically useful semiquantitative method of precompression assessment. J Ultrasound Med 2012;31(6):895–902) Because of the acoustic power of the ARFI pulse, the system will freeze for a few seconds for transducer cooling.
However, the stiﬀness of fat changes more than that of normal breast tissue and lesions; therefore, with precompression the ratio of lesion to fat will decrease. Care must also be taken that the FOV for the fat measurement contain only fat. The measurements should be taken at the same depth in the image as the degree of compression varies with depth. These factors were not controlled in the studies and may account for the variability of the results. When using this technique the appropriate cutoﬀ should be determined in your lab with your technique and equipment.
Results can be displayed in gray scale or with various color displays; preference is often determined by the user’s exposure to elastography and preference in interpretation. If a color map is used care must be taken because a standard has not been established, and a color map using red as stiﬀ or the opposite color map with blue as stiﬀ can be used. The color scale should always be included on the image for accurate interpretation. It is important to remember that in SE a relative scale is displayed and should not be confused with SWE where an absolute stiﬀness value is obtained and color coded on a per pixel basis.
Breast Elastography by Richard G. Barr