spatiotemporal image correlation (STIC) ... Ulsan College of Medicine, Asan Medical Center, South Korea. Objective: We ... suppmat/index.html. OC33.06.
15th World Congress on Ultrasound in Obstetrics and Gynecology
Oral communication abstracts
not change significantly with gestational age (Lines of regression: y = −0.007x + 61 and y = −0,12x + 65). Discussion: With these new techniques it is possible to assess the ejection fraction of the fetal heart. This may be valuable in the evaluation and monitoring of fetuses at risk and fetuses with congenital heart defects.
included conventional two dimensional and three dimensional (2D, 3D) imaging supplemented by 3D XI. The screening method is the same as that used in conventional 3D imaging, but the images displayed are similar to CT or MRI. Results: 3D XI screening resulted in multiple slice views of 111 fetuses at full strength (normal views, n = 6; abnormal, n = 105). 3D XI presented sequential, sectional views of sagittal, coronal, and axial planes at the same time, similar to CT or MRI. In our experience, 3D XI was useful in volume measurement of lesions in the hypothyroidism and congenital cystic adenomatoid malformation, and accurate localization and mapping of the Dandy Walker variants, cleft lip and cleft palate and heart anomalies. Conclusions: 3D XI is an innovative technology that may enable CT and MRI like technologies to be available in ultrasound. 3D XI may be a useful additional method for screening of fetal abnormalities.
OC33.03 Early visualization of the fetal coronary arteries by four-dimensional ultrasonography with B-flow imaging and spatiotemporal image correlation (STIC) L. F. Gon¸calves1 , J. Espinoza1 , J. P. Kusanovic2 , G. Mari1 , W. Lee3 , E. Soto2 , J. Santolaya-Forgas1 , M. C. Treadwell1 , R. Romero2 Wayne State University, USA, 2 Perinatology Research Branch, NICHD/NIH/DHHS, USA, 3 William Beaumont Hospital, Royal Oak, MI, USA 1
Objectives: Coronary arteries of normal fetuses can be visualized by color Doppler after 31 weeks of gestation. Earlier visualization may be possible with more sensitive methods for detection of blood flow. B-flow imaging is a technology that allows angleindependent detection of weak blood reflectors from vessels and has been previously used for 4D reconstruction of the cardiac outflow tracts. In this study, we used B-flow imaging with STIC to evaluate the coronary circulation of normal fetuses during the second and third trimesters. Material and methods: 64 examinations were performed in 62 normal fetuses between 15 and 40 weeks. Volume datasets were acquired with B-flow imaging and STIC using transverse sweeps through the fetal thorax. B-flow settings during acquisition were: dynamic range 12, sensitivity 4 to 5, and persistence 2. Volume acquisitions lasted from 10 to 15 seconds. Acquisition angles ranged from 20 to 30 degrees. A thick-slice rendering technique encompassing the left ventricle and the ascending aorta was used to visualize the right and left coronary arteries, which were identified as they emerged from the aortic root. Two observers who were not involved in volume acquisition analyzed the volume datasets. The coronary arteries were considered present when there was agreement between the two observers. Results: At least one coronary artery was visualized in 60.9% of cases (39/64). The right and left coronary arteries were visualized in 50.0% (32/64) and 40.6% (26/64) of the cases, respectively. The left circumflex artery was visualized in 3.1% of cases (2/64). The earliest gestational age at which both coronary arteries could be observed was 19 weeks and 1 day. Conclusion: Four-dimensional ultrasound using B-flow imaging and STIC allows early visualization of the fetal coronary circulation, opening up the possibility of early diagnosis and characterization of developmental anomalies of the coronary arteries.
OC33.05 Just images: Dynamic magnetic resonance imaging (DMR) as a new technology: clinical feasibility in obstetrics H. J. Cho, H. S. Won, S. K. Kim, J. Y. Shim, P. R. Lee, A. Kim Department of Obstetrics and Gynecolgy, University of Ulsan College of Medicine, Asan Medical Center, South Korea Objective: There is a limitation of the conventional sonogram as a method of screening fetal abnormalities due to speckling and shadowing of the images. We introduce a new technology with improved image contrast and detailed resolution and present clinical feasibility of the Dynamic Magnetic Resonance Imaging (DMR) in the screening of fetal abnormalities. Methods: DMR imaging using an Accuvix XQ 3D probe (Medison Co., Korea), in addition to conventional two and three dimensional (2 D, 3 D) prenatal screening sonograms, was used to investigate 13 fetuses with congenital abnormalities at Asan Medical Center (Seoul, Korea) between July 2004 and March 2005. DMR uses the same screening method as conventional 2D imaging, but with a special filter to reduce speckling patterns and enhance boundaries. Results: DMR resulted in abnormal views of all 13 fetuses. Heart anomalies, skeletal dysplasias, and various cystic lesions in the main were observed. DMR provided improved visualization of borders and interfaces for small vessels, bones, and heart structure; this also gave a clinical advantage for catheter insertion techniques. Image 01 shows images of ventricular septal defect using conventional 2D sonogram and DMR imaging. Image 01. Conventional 2D image (left) compared to DMR image (right) of ventricular septal defect (arrow) Conclusions: DMR provides improved contrast and detailed resolution of images compared to conventional 2D or 3D sonograms. DMR will be a useful additional method for screening of fetal abnormalities. SUPPLEMENTARY MATERIAL ON THE INTERNET (IMAGE)
OC33.04 Clinical application and usefulness of three dimensional extended image (3D XI) in obstetrics
http://www.interscience.wiley.com/jpages/0960-7692/ suppmat/index.html
H. S. Won, H. J. Cho, S. K. Kim, J. Y. Shim, P. R. Lee, A. Kim Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, South Korea Objective: We introduce new technology displaying three dimensional (3D) multiple slice images similar to CT or MRI. We present clinical applications of Three Dimensional Extended Image (3D XI) in the screening of fetal abnormalities. Methods: Prenatal ultrasonography using an Accuvix XQ 3D probe (Medison Co., Korea) was used to investigate 111 fetuses, with and without congenital abnormalities, at Asan Medical Center between July 2004 and March 2005. The screening ultrasonogram
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OC33.06 A longitudinal kinematical study of fetal hand movements through 4D ultrasound G. D’Ottavio1 , S. Zoia1 , L. Blason2 , A. Scabar2 , M. Bulgheroni2 , U. Castiello3 1 3
Istituto per L’Infanzia – Burlo Garofolo, Italy, 2 Italy, University of Padua, Italy
The objective of the present study was to perform a detailed longitudinal kinematical analysis of the fetal hand movements. Over a
Ultrasound in Obstetrics & Gynecology 2005; 26: 309–375
