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임문환(Moon Whan Im),송경은(Kyung Eun Song),김현미(Hyun Mi Kim),김종필(Jong Pil Kim),이정례(Jeong Rye Lee),박지현(Jee Hyun Park),황성욱(Sung Ook Hwang),노인화(In Hwa Noh),고승권(Seung Kwon Koh),이병익(Byoung Ick Lee),이우영(Woo Young 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.12
N/A Objectives : Our study was to measure how well semiquantitative three-dimensional ultrasonographic measures of amniotic fluid in the third trimester, to investigate the relationship between three-dimensional amniotic fluid volume and amniotic fluid index, two dimensional amniotic fluid volumes. Methods : We compared amniotic fluid volume as measured by three-dimensional ultrasonographic techniques with amniotic fluid index including two dimensional amniotic fluid volume in 33 women during in the third trimester. Results : There was highly significant linear correlations of three-dimensional amniotic fluid volumes with AFI (r=0.6898) and two dimensional amniotic fluid volume (r=0.7926). Conclusion : Three-dimensional ultrasonographic technology has clinical significance as a tool to measure amniotic fluid volume. There are highly significant correlations of three dimensional amniotic volumes with AFI and two dimensional volume.
( Hyewon Hur ),( Young Han Kim ),( Hee Young Cho ),( Yong Won Park ),( Hye Sung Won ),( Mi Young Lee ),( Bo Hyon Yun ),( Kwang Hee Lee ),( Sung Yoon Kim ),( Junsang Yoo ),( Ja Young Kwon ) 대한산부인과학회 2015 Obstetrics & Gynecology Science Vol.58 No.4
Objective: To evaluate the feasibility of five-dimensional Long Bone (5D LB), a new technique that automatically archives, reconstructs images, and measures lengths of fetal long bones, to assess whether the direction of volume sweep influences fetal long bone measurements in three-dimensional (3D) ultrasound and 5D LB, and to compare measurements of fetal long bone lengths obtained with 5D LB and those obtained with conventional two-dimensional (2D) and manual 3D techniques. Methods: This prospective study included 39 singleton pregnancies at 26+0 to 32+0 weeks of gestation. Multiple pregnancies, fetuses with multiple congenital anomalies, and mothers with underlying medical diseases were excluded. Fetal long bones of the lower extremities-the femur, tibia, and fibula were measured by 2D and 3D ultrasound, and 5D LB, by an expert and non-expert examiner. First, we analyzed the 3D ultrasound and 5D LB data according to 2 different sweeping angles. We analyzed intra- and inter-observer variability and agreement between ultrasound techniques. Paired t-test, interclass correlation coefficient, and Bland-Altman plot and Passing-Bablok regression were used for statistical analysis. Results: There was no statistical difference between long bone measurements analyzed according to 2 different volume-sweeping angles by 3D ultrasound and 5D LB. Intra- and inter-observer variability were not significantly different among all 3 ultrasound techniques. Comparing 2D ultrasound and 5D LB, the interclass correlation coefficient for femur, tibia, and fibula was 0.91, 0.92, and 0.89, respectively. Conclusion: 5D LB is reproducible and comparable with conventional 2D and 3D ultrasound techniques for fetal long bone measurement.
( Yang Seon Yi ),( Sang Soo Kim ),( Won Jin Kim ),( Min Jung Bae ),( Ji Hyun Kang ),( Bo Gwang Choi ),( Yun Kyung Jeon ),( Bo Hyun Kim ),( Byung Joo Lee ),( Soo Geun Wang ),( In Joo Kim ),( Yong Ki Ki 대한내과학회 2016 The Korean Journal of Internal Medicine Vol.31 No.2
Background/Aims: The purpose of this study was to compare the diagnostic validity of two-dimensional (2D) and three-dimensional (3D) ultrasonography (US) when predicting the extrathyroidal extension of papillary thyroid cancer. Methods: All 2D data were interpreted in real time and 3D data were stored, rendered using tomographic ultrasound imaging (TUI), and then reviewed retrospectively. Results: Extrathyroidal extension was present in 17 papillary thyroid cancers 24.3%) on pathology reports. The presence of contact was significantly associated with extrathyroidal extension on both 2D and 3D US (p = 0.007 and p = 0.003), and the sensitivity and specificity were not significantly different between 2D and 3D US (p = 1.000 and p = 0.754). The coexistence of protrusion and contact was not significantly associated with extrathyroidal extension on either 2D or 3D sonogram. Conclusions: Three-dimensional images rendered with TUI algorithms alone do not seem to be markedly superior to real-time 2D US in predicting the extrathyroidal extension of papillary thyroid cancer.
임신 초기 3차원 초음파로 양막대를 확인한 뇌없음증이 동반된 양막대 증후군 증례
조현진 ( Hyun Jin Cho ),김연미 ( Yeon Mee Kim ),전균호 ( Gyun Ho Jeon ),전성욱 ( Sung Wook Chun ),정철회 ( Chul Hoi Jeong ),지용일 ( Yong Il Ji ) 대한산부인과학회 2011 Obstetrics & Gynecology Science Vol.54 No.3
Amniotic band syndrome (ABS) is entrapment of fetal parts by disrupted amnion and formation of fibrous amniotic band. As results, it causes a variety of fetal malformation involving the limbs, the craniofacial region and trunk. A visualization of free floating amniotic band is appropriate diagnostic method for ABS. Three dimensional (3D) and four dimensional (4D) ultrasounds are useful to diagnosis ABS. However prenatal diagnosis is difficult especially when they do not circulate a limb or cause single abnormality. In the cases of anencephaly, a differentiation between ABS and primary neural tube defect is important because the recurrence rate is significantly different. We reported a case that a fetal anencephaly with hydrops was diagnosed using prenatal 3D and 4D ultrasound then confirmed as amniotic band syndrome by autopsy at 12 weeks of gestation. After autopsy, we demonstrated amniotic band through 3D ultrasound review.
김태은 ( Tae Eun Kim ),이순표 ( Soon Pyo Lee ),박종민 ( Jong Min Park ),황병철 ( Byung Chul Whang ),김석영 ( Suk Young Kim ) 대한산부인과학회 2009 Obstetrics & Gynecology Science Vol.52 No.8
Lymphangiomas are congenital anomalies of the lymphatic system in which abnormal lymphatic channels are localized to form a benign mass. Lymphangiomas are classified into 3 types: simple, cavernous, and cystic (=cystic hygroma). Mixed forms may coexist. Cavernous lymphangiomas are very rare variants and characterized by penetration through the subcutaneous area between the muscular septa. Lymphangiomas are typically presented in the head, neck and axillary region, while cavernous lymphangiomas most commonly occur in the thorax or retroperitoneum. Although there are many papers about the cystic hygroma, a few cases of fetal thoracoabdominal cavernous lymphangioma have been reported. Accurate prenatal diagnosis and anatomical evaluation are important for delivery planning and prompt postnatal resuscitation. The anomaly was assessed by two dimensional (2D), three dimensional (3D), and real-time multiplanar four dimensional (4D) ultrasound. This case report confirms the usefulness of the 3D, real-time multiplanar 4D ultrasound to assess the mass extension and relationship with adjacent structures. We present a case of fetal thoracoabdominal cavernous lymphangioma diagnosed by 2D, 3D, real-time multiplanar 4D ultrasound with brief review of literatures.
초음파 영상에서 LoG 연산자를 이용한 진단 객체의 3차원 분할
정말남,곽종인,김상현,김남철 대한의용생체공학회 2003 의공학회지 Vol.24 No.4
This paper proposes a three-dimensional (3D) segmentation algorithm for extracting a diagnostic object from ultrasound images by using a LoG operator In the proposed algorithm, 2D cutting planes are first obtained by the equiangular revolution of a cross sectional Plane on a reference axis for a 3D volume data. In each 2D ultrasound image. a region of interest (ROI) box that is included tightly in a diagnostic object of interest is set. Inside the ROI box, a LoG operator, where the value of $\sigma$ is adaptively selected by the distance between reference points and the variance of the 2D image, extracts edges in the 2D image. In Post processing. regions of the edge image are found out by region filling, small regions in the region filled image are removed. and the contour image of the object is obtained by morphological opening finally. a 3D volume of the diagnostic object is rendered from the set of contour images obtained by post-processing. Experimental results for a tumor and gall bladder volume data show that the proposed method yields on average two times reduction in error rate over Krivanek's method when the results obtained manually are used as a reference data.
Chun Wai Chan,Sze Chai Christy Chow,Man Hei Kwok,Ka Ching Tiffany Ngan,Tsun Hei Or,Simon Takadiyi Gunda,Michael Ying 대한초음파의학회 2023 ULTRASONOGRAPHY Vol.42 No.2
Purpose: Carotid vessel wall volume (VWV) measurement on three-dimensional ultrasonography (3DUS) outperforms conventional two-dimensional ultrasonography for carotid atherosclerosis evaluation. Although time-saving semi-automated algorithms have been introduced, their clinical availability remains limited due to a lack of validation, particularly an extensive reliability analysis. This study compared inter-observer and intra-observer reliability between manual segmentation and semi-automated segmentation for carotid VWV measurements on 3DUS. Methods: Thirty-one 3DUS volume datasets were prospectively acquired from 20 healthy subjects, aged >18 years, without previous stroke, transient ischemic attack, or cardiovascular disease. Five observers segmented all volume datasets both manually and semi-automatically. The process was repeated five times. Reliability was expressed by the intraclass correlation coefficient, supplemented by the coefficient of variation. Results: Carotid VWV measurements using the common carotid artery (CCA) were more reliable than those using the internal carotid artery (ICA) or external carotid artery (ECA) for both manual and semiautomated segmentation (manual segmentation, CCA: inter-observer, 0.935; intra-observer, 0.934 to 0.966; ICA: inter-observer, 0.784; intra-observer, 0.756 to 0.878; ECA: inter-observer, 0.732; intraobserver, 0.919 to 0.962; semi-automated segmentation, CCA: inter-observer, 0.986; intra-observer, 0.954 to 0.993; ICA: inter-observer, 0.977; intra-observer, 0.958 to 0.978; ECA: inter-observer, 0.966; intra-observer, 0.884 to 0.937). Total carotid VWV measurements by manual (inter-observer, 0.922; intra-observer, 0.927 to 0.961) and semi-automated segmentation (inter-observer, 0.987; intra-observer, 0.968 to 0.989) were highly reliable. Semi-automated segmentation showed higher reliability than manual segmentation for both individual and total carotid VWV measurements. Conclusion: 3DUS carotid VWV measurements of the CCA are more reliable than measurements of the ICA and ECA. Total carotid VWV measurements are highly reliable. Semi-automated segmentation has higher reliability than manual segmentation.