Ultrasonic fetal and placental tissue characterization and lung maturity

Podobnik, Mario; Brayer, B.; Ciglar, Srećko; Duić, Željko; Podgajski, Mario

doi:10.1016/0020-7292(96)02684-7

Cited by 9 publications

(7 citation statements)

References 13 publications

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“…Thus, intrauterine evaluation of foetal lung is clinically challenging, due to invasiveness and questionable efficacy of the available tests (Prakash et al, 2002;Varner et al, 2013). Development of accurate and non-invasive techniques, such as elastography, can provide an earlier and more precise diagnosis of lung abnormalities (Kim et al, 2013;Podobnik, Brayer, Ciglar, Duić, & Podgajski, 1996).…”

Section: Discussionmentioning

confidence: 99%

Acoustic radiation force impulse (ARFI) elastography to asses maternal and foetal structures in pregnant ewes

Silva

Uscátegui

Santos

et al. 2018

Reprod Domestic Animals

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Contents The aim of this study was to evaluate the stiffness of foetal lungs, liver, kidneys and placentomes by acoustic radiation force impulse (ARFI) elastography in ovine and to correlate obtained findings with foetal development. Twenty‐four ewes were included, and tissue stiffness of foetal lung, liver, kidney and placentome was measured beginning with 10th gestational week by qualitative–quantitative ARFI elastography. A total of 33 healthy lambs were born. Qualitative elastographic analysis permitted to classify maternal and foetal tissues elasticity in decreasing order as follows: placentome, kidney, liver and lung. Regarding quantitative ARFI elastography data, shear wave velocity (SWV) of foetal lung and liver varied. The lung SWV decreased gradually from the 16th to the 21st gestational week (R2 = 0.80; p < 0.001), while liver SWV increased gradually from the 14th to 21st gestational week (R2 = 0.80; p < 0.001). In contrast, the kidneys and placentomes SWV's remained constant through gestation (p = 0.076; and 0.34). ARFI elastography was shown feasible for evaluation of maternal and foetal tissues stiffness in the ovine model. It can be used to demonstrate pulmonary and hepatic stiffness modifications during foetal development.

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Section: Discussionmentioning

confidence: 99%

Acoustic radiation force impulse (ARFI) elastography to asses maternal and foetal structures in pregnant ewes

Silva

Uscátegui

Santos

et al. 2018

Reprod Domestic Animals

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“…8). The coefficient of variation corresponds to the Mean/Standard Deviation (MEAN/STD) (Podobnik et al, 1996).…”

Section: Resultsmentioning

confidence: 99%

“…In the literature, there are a variety of feature extraction algorithms applicable to ultrasound images, but a few study have been reported on the placental tissue development. In a previous study (Podobnik et al, 1996), the ultrasonic placental tissue development is characterized by a coefficient of variation according to the week of gestation. No relation exists between the week of gestation and the development of the grade.…”

Section: Discussionmentioning

confidence: 99%

DWT to Classify Automatically the Placental Tissues Development: Neural Network Approach

Ayache¹

2010

Journal of Computer Science

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Problem statement: This study proposed an approach for classification of placental tissues development using ultrasound images. Approach: This approach was based to the selection of tissues, feature extraction by discrete wavelet transform and classification by neural network and especially the Multi Layer Perceptron (MLP). Results: The proposed approach was tested for ultrasound placental images; resulting in 95% success rate. Conclusion/Recommendations: The method showed a good recognition for placental tissues and will be useful for detection of the placental anomalies those concerning the premature birth and the intrauterine growth retardation

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“…The use of ultrasound is already well stablished as a viable and non-invasive way to evaluate foetuses and its tissues, and a promisor alternative for the pulmonary maturity estimation. In humans, Podobnik, Brayer, Ciglar, Duić, and Podgajski (1996) analyzed echotextural attributes of the placenta, foetal liver and lung correlating the lung values with foetal maturity. Quantitative analysis of ultrasonography images has been used to establish normal canine hepatic echogenicity (Ivancic & Mai, 2008), and normal feline renal echogenicity (Drost, Henry, Meinkoth, Woods, & Lehenbauer, 2000).…”

Section: Contentsmentioning

confidence: 99%

Qualitative and quantitative ultrasound attributes of maternal‐foetal structures in pregnant ewes

Silva

Uscategui

Santos

et al. 2018

Reprod Domestic Animals

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The aim of this study was to examine foetal organs and placental tissue to establish a correlation between the changes in the composition of these structures associated with their maturation and the ultrasonographic characteristics of the images. Twenty-four pregnant ewes were included in the study. Ultrasonography assessments were performed in B-mode, from the ninth gestational week until parturition. The lungs, liver and kidneys of foetuses and placentomes were located in transverse and longitudinal sections to evaluate the echogenicity (hypoechoic, isoechoic, hyperechoic or mixed) and echotexture (homogeneous and heterogeneous) of the tissues of interest. For quantitative evaluation of the ultrasonographic characteristics, it was performed a computerized image analysis using a commercial software (Image ProPlus ). Mean numerical pixel values (NPVs), pixel heterogeneity (standard deviation of NPVs) and minimum and maximum pixel values were measured by selecting five circular regions of interest in each assessed tissue. All evaluated tissues presented significant variations in the NPVs, except for the liver. Pulmonary NPVmean, NPVmin and NPVmax decreased gradually through gestational weeks. The renal parameters gradually decreased with the advancement of the gestational weeks until the 17th week and later stabilized. The placentome NPVmean, NPVmin and NPVmax decreased gradually over the course of weeks. The hepatic tissue did not show echogenicity and echotexture variations and presented medium echogenicity and homogeneous echotexture throughout the experimental period. It was concluded that pixels numerical evaluation of maternal-foetal tissues was applicable and allowed the identification of quantitative ultrasonographic characteristics showing changes in echogenicity related to gestational age.

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Ultrasonic fetal and placental tissue characterization and lung maturity

Cited by 9 publications

References 13 publications

Acoustic radiation force impulse (ARFI) elastography to asses maternal and foetal structures in pregnant ewes

Acoustic radiation force impulse (ARFI) elastography to asses maternal and foetal structures in pregnant ewes

DWT to Classify Automatically the Placental Tissues Development: Neural Network Approach

Qualitative and quantitative ultrasound attributes of maternal‐foetal structures in pregnant ewes

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