Experimental study on temperature rise of acoustic radiation force elastography

Tabaru, Marie; Yoshikawa, Hiroyuki; Azuma, Takashi; Asami, Rei; Hashiba, Kunio

doi:10.1007/s10396-012-0357-8

Cited by 23 publications

(6 citation statements)

References 23 publications

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“…The ARFI elastography was performed without discomfort to the pregnant bitches and there was no evidence of alterations in the factors being evaluated as result of the use of this technique, considering it a safe and a non-invasive approach. There were similar observations by Tabaru et al (2012) in a study on the biological effects of ultrasonography in fetal evaluation. These findings were verified by Sugitani et al (2013) in women when there was reporting that, microscopically, there were no structural, thermal, or mechanical changes in the tissues studied.…”

Section: Discussionsupporting

confidence: 79%

Placental ARFI elastography and biometry evaluation in bitches

Simões

Maronezi

Uscátegui

et al. 2020

Animal Reproduction Science

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Placental rigidity and biometry of twelve pregnant bitches were evaluated using B-mode and Acoustic Radiation Force Impulse (ARFI) ultrasonography, performed once daily, from day 15 of gestation until parturition. Specific software (Virtual Touch Tissue Quantification® VTTQ and Virtual Touch Tissue Imaging Quantification® VTTIQ) were used. Values for results for variables were correlated and regression models related to gestational day were used to make evaluations. Maternal-fetal placental thickness increased to day 63 (P < 0.0001; R² = 0.91); maternal placental thickness increased until day 40 (P = 0.0340; R² = 0.54); and fetal placental thickness increased to day 50 (P < 0.0001; R² = 0.83) of gestation. Shear wave velocity (SWV) of the dorsal (P < 0.0010) was greater than lateral, which in turn was greater (P = 0.020) than the ventral area. The SWV of the dorsal area as determined using VTTQ, decreased from day 21 to 35 and increased to day 56 of gestation (P = 0.0291; R² = 0.4021); lateral SWV decreased from day 24 to 45 and increased until the time of parturition (P < 0.001; R² = 0.6055). The SWV of the dorsal area, as determined using VTTIQ, decreased from day 21 to 43 and then increased to day 60 of gestation (P = 0.0016; R² = 0.5075); and ventral area SWV increased from day 21 to 23 and decreased until the time of parturition (P < 0.001; R² = 0.8055). Placental alterations reflect structural and biochemical gestational adaptations and can become useful techniques for obstetrics.

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Section: Discussionsupporting

confidence: 79%

Placental ARFI elastography and biometry evaluation in bitches

Simões

Maronezi

Uscátegui

et al. 2020

Animal Reproduction Science

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“…The BMUS guidelines for the safe use of diagnostic ultrasound equipment (BMUS Safety Group 2010) suggests using the bone thermal index for obstetric scans after the 10 th week. Many other studies have shown that heating of bones is much higher than that of soft tissues (Tabaru et al 2012;Nitta et al 2001). Further studies should be performed on phantoms containing soft tissues and bone mimicking materials.…”

Section: Discussionmentioning

confidence: 95%

On the opportunity to integrate absorption heat pumps in substations of district energy networks

Chardon

Pierrès

Ramousse

2020

Thermal Science and Engineering Progress

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“…17 The radiation force based elastography (ARFI, SWE) though involves higher TI, it is still within limits set by American Institute of Ultrasound in Medicine and risk considerations are similar to the Doppler imaging mode. 17,[136][137][138] Funding None.…”

Section: Potential Riskmentioning

confidence: 99%

Elastogram: Physics, Clinical Applications, and Risks

Chen

et al. 2019

Maternal-Fetal Medicine

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The tissue stiffness is always an interesting issue to clinicians. Traditionally, it is assessed by the manual palpation, and this now can be measured by the ultrasound-based elastography. The basic physics is based on Young's modulus through the Hooke's law: E= S/e, where the Young's modulus (E) equals to the stress applied to the object (S) divided by the generated strain (e). With the rapid advancement of technology, the elastography has evolved from quasi-static elastography (ie, strain elastography) to dynamic elastography (i,e, shear wave elastography). The key differentiation of these two categories roots in the stimuli applied, namely mechanical or acoustic radiation force, and the response of the soft tissue. The strain elastography requires the operator to compress and decompress the tissue manually and the motion of the tissue during the stimuli is tracked to calculate the strain to reflect the tissue stiffness. While strain elastography is operator-dependent, shear wave elastography is not. Using shear wave elastography, the tissue is stimulated by the acoustic radiation force which can generate shear wave traveling through the tissue transversely. The shear wave propagation speed (V s ) is related to the shear modulus (m) of the medium: m = rV s 2 , where r is the density of the tissue and assumed to be a constant as 1000 kg/m 3 . In the incompressible biological tissue, the Young's modulus is approximately three times the shear modulus (E≈3 m). So the quantitative measurements of the tissue stiffness can be attained by shear wave elastography. The clinical application of elastography and its diagnostic capability has been extended. The knowledge of the basic physics of the various type of elastography facilitates the effective use of elastography. This review presented the clinical application and the risks of different types of elastography.

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Experimental study on temperature rise of acoustic radiation force elastography

Abstract: In conclusion, the imaging area, including the path of the push wave, should be carefully checked and the time interval for consecutive use should be adjusted to prevent thermal risk on the surface of the bone.

Cited by 23 publications

References 23 publications

Placental ARFI elastography and biometry evaluation in bitches

Placental ARFI elastography and biometry evaluation in bitches

On the opportunity to integrate absorption heat pumps in substations of district energy networks

Elastogram: Physics, Clinical Applications, and Risks

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