The role of viscosity in the impulse diffraction field of elastic waves induced by the acoustic radiation force

2004 ◽  
Vol 51 (11) ◽  
pp. 1523-1536 ◽  
Author(s):  
J. Bercoff ◽  
M. Tanter ◽  
M. Muller ◽  
M. Fink
Keyword(s):  
Elastic Waves ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Diffraction Field

scholarly journals The role of the acoustic radiation force in color Doppler twinkling artifacts

2015 ◽  
Vol 34 (2) ◽  
pp. 109-114
Author(s):  
Jeong-hwa Yang ◽  
Gwansuk Kang ◽  
Min Joo Choi
Keyword(s):  
Acoustic Radiation ◽  
Color Doppler ◽  
Radiation Force ◽  
Acoustic Radiation Force

Role of acoustic radiation force impulse and shear wave velocity in prediction of preterm birth: a prospective study

2017 ◽  
Vol 59 (6) ◽  
pp. 755-762 ◽  
Author(s):  
Arjit Agarwal ◽  
Shubhra Agarwal ◽  
Shruti Chandak
Keyword(s):  
Preterm Birth ◽  
Shear Wave ◽  
Shear Wave Velocity ◽  
Preterm Labor ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Cervical Length ◽  
Acoustic Radiation Force ◽  
Acoustic Radiation Force Impulse

Background Preterm birth is one of the important causes of neonatal morbidity where we rely on subjective criteria such as modified Bishop’s scoring and contemporary sonographic measurement of cervical length. Acoustic radiation force impulse (ARFI) is a technological advancement in elastography that can be employed in prediction of cervical softening and preterm labor. Purpose To evaluate the role of ARFI technique and shear wave velocity (SWV) estimates as a predictor of preterm birth and its comparison with other clinical and sono-elastographic measures. Material and Methods Thirty-four pregnant women (gestation age = 28–37 weeks age) showing features suggestive of preterm labor were included and evaluated with modified Bishop’s score, cervical length by ultrasound (US), ARFI to derive Elastography index (EI), and SWV of the cervix. The patients were later divided into two groups, using the clinical outcome of preterm or term delivery. Results Twenty patients delivered at term (gestational age > 37 weeks) and 14 were preterm. Receiver operating characteristics (ROC) curves showed SWV with highest sensitivity and specificity (93% and 90%, respectively) for the prediction of preterm birth at a cutoff value of 2.83 m/s. EI and modified Bishop’s score were comparable to each other, but were less sensitive techniques. Conclusion Elastographic assessment of antenatal cervix is a novel technique of virtual palpation of internal os and can be utilized as an objective criterion for preterm birth prediction.

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