Three‐dimensional power Doppler sonography: imaging and quantifying blood flow and vascularization

Pairleitner, H.; Steiner, H; Hasenoehrl, G.; Staudach, Alf

doi:10.1046/j.1469-0705.1999.14020139.x

Cited by 358 publications

(273 citation statements)

References 13 publications

(15 reference statements)

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“…With improved 3-dimensional (3D) sonographic technology, it is now possible to evaluate the placental volume as well as vascularization status using power Doppler sonography. [1][2][3][4][5][6] The Doppler parameters derived from 3D interrogation are different from those using conventional sonography and include the vascularization index (VI), flow index (FI), and vascularization-flow index (VFI). [2][3][4] These indices have been reliably measured in the placenta and other gynecologic organs.…”

mentioning

confidence: 99%

Reproducibility of Placental Volume and Vasculature Indices Obtained by 3-Dimensional Power Doppler Sonography

Huster

Haas

Schoenborn

et al. 2010

Journal of Ultrasound in Medicine

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Objective. The purpose of this study was to evaluate the reproducibility of 3‐dimensional (3D) power Doppler assessment of placental volumes and vascularization before adopting these in routine evaluation of normal and complicated pregnancies. Methods. A prospective study was performed on 30 normal singleton pregnancies from 11 to 14 weeks. To evaluate placental vascularization, 3D power Doppler sonography was applied to obtain a placental volume, and the volume acquired was analyzed using virtual organ computer‐aided analysis. Two consecutive measurements were taken from each patient by two observers blinded to each other's and the individual's previous measurement. This yielded a total of 60 data set pairs. The placental volume, vascularization index, flow index, and vascularization‐flow index (VFI) were calculated. Normal distribution of the data was confirmed with the Kolmogorov‐Smirnov test. Intraobserver and interobserver correlations were evaluated. Bland‐Altman plots and statistics were used to compare the 95% limits of agreement between measurements. Results. All 3D power Doppler placental volumes and vascular indices showed intraobserver correlations of 0.80 or higher. Similar excellent interobserver correlations were seen for all indices with the exception of the VFI, which showed a lower but acceptable correlation. The Bland‐Altman analyses indicated good reproducibility of the evaluated placental indices. Conclusions. Our findings provide validation of the technique, showing good reproducibility of the 3D power Doppler parameters when applied to studies of the placental volume and vascular tree.

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mentioning

confidence: 99%

Reproducibility of Placental Volume and Vasculature Indices Obtained by 3-Dimensional Power Doppler Sonography

Huster

Haas

Schoenborn

et al. 2010

Journal of Ultrasound in Medicine

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“…The measurement calibrators were positioned at the embryo poles, and after the delimitation of 15 sequential planes, the equipment processed a reconstructed image with its volume expressed in cm 3 . After adjustments in the areas constituting the three-dimensional image, such image was accepted, and the vocal shell histogram key was activated, and the 3D power Doppler indices of the embryo (VI, FI and VFI) (Figure 1) were automatically calculated, VI corresponding to the number of color voxels and representing the percentage of the Doppler signal (vascularization) detected within the ROI; FI corresponding to the mean color value of all the color voxels, representing the mean intensity of the Doppler power signal within the ROI; and VFI, comprising the mean color value of all the color voxels and of the gray scale, constituting a combination of the other indices (originated from their multiplication and division of the result by 100) and has been suggested to be representative of the vascularization and flow intensity (9) . At the end of the volumetric calculation, the VOCAL (Virtual Organ Computer-aided AnaLysis) software allows the return to each one of the delimited planes, in order to perform corrections on the embryo's contours, if necessary.…”

Section: Methodsmentioning

confidence: 99%

Reprodutibilidade interobservador dos índices vasculares do Doppler de amplitude tridimensional do embrião entre 7 e 10 semanas e 6 dias de gestação

et al. 2010

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OBJETIVO: Avaliar a reprodutibilidade interobservador dos índices de vascularização do Doppler de amplitude tridimensional (Doppler de amplitude 3D) no primeiro trimestre de gestação. MATERIAIS E MÉTODOS: Realizou-se estudo de reprodutibilidade com 32 gestantes normais entre 7 e 10 semanas e 6 dias. Para o cálculo do volume tridimensional dos embriões utilizou-se o método VOCAL (Virtual Organ Computer-aided AnaLysis) com ângulo de rotação de 12°. Em seguida obtiveram-se, automaticamente, os três índices vasculares do Doppler de amplitude 3D: índice de vascularização (VI), índice de fluxo (FI) e índice de vascularização e fluxo (VFI). Para o cálculo da variabilidade interobservador, um examinador realizou uma segunda medida dos 32 embriões e um segundo examinador realizou uma terceira medida dos mesmos volumes, ambos desconhecendo os resultados do outro. Utilizaram-se, para análise estatística, o coeficiente de correlação intraclasse (CCI) e gráficos de Bland-Altman. RESULTADOS: Observou-se boa reprodutibilidade interobservador dos três índices vasculares. O VI apresentou CCI = 0,9 e média da diferença = -1,1; o FI apresentou CCI = 0,9 e média da diferença = -0,5; e o VFI apresentou CCI = 0,9 e média da diferença = -1,1. CONCLUSÃO: Os índices vasculares do Doppler de amplitude 3D do embrião no primeiro trimestre de gestação foram altamente reprodutíveis, em especial o FI.

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“…The vascularization flow index (VFI) is the average value of the color in all gray and color voxels of the ovarian volume, expressing this way the total vascularization of the ovary. 14 The contours of the corpus luteum were drawn manually following the outer contour of the thick color ring surrounding it.…”

Section: Methodsmentioning

confidence: 99%

Corpus Luteum Morphology and Vascularization Assessed by Transvaginal Two-dimensional and Three-dimensional Ultrasound

Bajo¹,

Gómez²,

Álvarez³

et al. 2007

Donald School Journal of Ultrasound in Obstetrics and Gynecology

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Background: Our aim was to describe the corpus luteum morphology by two-dimensional ultrasound correlated by its vascularization and volume by 3D ultrasound and study the possible relationship between serum progesterone levels and the corpus luteum morphology.Methods: Thirty-eight women were included in an intrauterine insemination program (IUI) in Santa Cristina University's Hospital. All the patients were evaluated in mesoluteal phase, the day +7 after hCG administration, by two-dimensional and three-dimensional ultrasound. The volume and vascular indices of the corpus luteum were calculated off-line using virtual organ computer-aided analysis (VOCAL TM ) software.Results: Four different morphologies were described in the corpus luteum: echo-positive, echo-negative or sonoluscent, mixed echogenicity or nonvisible. Corpus luteum with mixed echogenicity was the most frequent one with 37.5% (12 cases). The corpus luteum vascular indices change in each morphology type, but there was statistically significant association just in vascularization index between echo-negative and mixed echogenicity corpus luteum morphologies, with p = 0.034. The rest of vascular indices do not change in each morphology corpus luteum types. There was statistically significant difference in mean gray value between echo-negative and mixed echogenicity morphologies, with p = 0.007. There were no statistically significant correlations between the corpus luteum morphology and the corpus luteum volume of any of the different types. There either was no statistically significant correlation between the corpus luteum morphology and progesterone serum levels on day +7 postovulation. Conclusions:The mixed echogenicity corpus luteum morphology has more vessels and more cell mass than echo-negative ones. Progesterone serum levels in mid-luteal phase has no influence in corpus luteum morphology and vascularization.

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Three‐dimensional power Doppler sonography: imaging and quantifying blood flow and vascularization

Abstract: ABSTRACT

Cited by 358 publications

References 13 publications

Reproducibility of Placental Volume and Vasculature Indices Obtained by 3-Dimensional Power Doppler Sonography

Reproducibility of Placental Volume and Vasculature Indices Obtained by 3-Dimensional Power Doppler Sonography

Reprodutibilidade interobservador dos índices vasculares do Doppler de amplitude tridimensional do embrião entre 7 e 10 semanas e 6 dias de gestação

Corpus Luteum Morphology and Vascularization Assessed by Transvaginal Two-dimensional and Three-dimensional Ultrasound

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