Clinical practice guidelines for ultrasound elastography: prostate

• Published in: Journal of medical ultrasonics (2001) Vol. 43; no. 3; pp. 449 - 455
• Format: Journal Article
• Language: English
• Published: Tokyo Springer Japan 01.07.2016; Springer; Springer Nature B.V
• Subjects: Acoustics; Calcification; Clinical practice guidelines; Deformation; Elasticity Imaging Techniques - instrumentation; Elasticity Imaging Techniques - methods; Guideline; Humans; Hyperplasia; Imaging; Japan; Male; Medical diagnosis; Medicine; Medicine & Public Health; Modulus of elasticity; Practice guidelines (Medicine); Propagation; Propagation velocity; Prostate; Prostate - diagnostic imaging; Prostate cancer; Prostatic Neoplasms - diagnostic imaging; Prostatic Neoplasms - surgery; Radiation; Radiology; Shear; Static deformation; Symmetry; Ultrasonic imaging; Ultrasonography - instrumentation; Ultrasonography - methods; Ultrasound; Wave propagation; Prostate Cancer; Gleason Score; Acoustic Radiation Force Impulse; Shear Wave; Cancer Detection Rate
• ISSN: 1346-4523; 1613-2254
• DOI: 10.1007/s10396-016-0703-3

Distortion represents the elasticity with respect to a static deformation, while the propagation of shear waves represents the deformation in the band of the shear waves (up to 1 kHz); it is understood that the elasticities assessed by SE and SWE are not necessarily the same, in that the influence from viscosity is included as well as that of elasticity. [...]regarding the degree of the same deformation, SE calculates the deformation rate of strain, the difference in the displacement between the two locations, by dividing the distance between the two locations, whereas ARFI imaging expresses the displacement per se at a location. Shear wave elastography Recently, SWE that enables clinical applications mostly for the diagnoses of breast cancer and hepatic fibrosis is based on the theoretical formula that the elasticity modulus (Young’s modulus) is proportional to the square of the propagation velocity of shear waves, where it is assumed that shear waves are formed properly in the body and generally propagate directionally. [...]the fact that the object is small, roundish and the multiformal surrounding tissues are also among the inconvenient conditions for the measurement of the propagation velocity of shear waves. [...]there have been a few reports in an attempt to perform SWE of the prostate.