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Ultrasonography

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https://www.readbyqxmd.com/read/28301922/current-status-of-core-needle-biopsy-of-the-thyroid
#1
Jung Hwan Baek
No abstract text is available yet for this article.
March 8, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28322033/prenatal-diagnosis-of-aberrant-right-subclavian-artery-in-an-unselected-population
#2
Mi Jin Song, Byoung Hee Han, Young-Hwa Kim, So Young Yoon, Yoo Mi Lee, Hye Su Jeon, Bo Kyung Park
Purpose: The purpose of this study was to determine the frequency of aberrant right subclavian artery (ARSA) among unselected fetuses and to evaluate its association with chromosomal abnormalities and other congenital anomalies. Methods: In all, 7,547 fetuses (gestational age, 20 to 34 weeks) were examined using routine antenatal sonography at our institution between April 2014 and September 2015. The right subclavian artery was assessed using grayscale and color Doppler ultrasonography in the transverse 3-vessel and tracheal view, and confirmed in the coronal plane...
February 20, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28322034/medical-auditing-of-whole-breast-screening-ultrasonography
#3
Min Jung Kim
Since breast ultrasonography (US) has been used as an adjunctive screening modality in women with dense breasts, the need has arisen to evaluate and monitor its possible harm and benefits in comparison with other screening modalities such as mammography. Recently, the fifth edition of the Breast Imaging Reporting and Data System published by the American College of Radiology has suggested auditing methods for screening breast US. However, the method proposed therein is slightly different from how diagnostic performance was calculated in previous studies on screening breast US...
February 16, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28290184/ultrasound-contrast-enhanced-study-as-an-imaging-biomarker-for-anti-cancer-drug-treatment-preliminary-study-with-paclitaxel-in-a-xenograft-mouse-tumor-model-secondary-publication
#4
Hak Jong Lee, Sung Il Hwang, Jonghoe Byun, Hoon Young Kong, Hyun Sook Jung, Mira Kang
Purpose: The purpose of this study was to assess tumor angiogenesis using contrast-enhanced ultrasonography (CEUS) of human prostate cancer cells (PC3) that were implanted in mice before and after paclitaxel injection. Methods: Twelve mice were injected with human prostate cancer cells (PC3). The mice were grouped into two groups; one was the paclitaxel-treated group (n=6) and the other was the control group (n=6). Before administering paclitaxel into the peritoneal cavity, baseline CEUS was performed after the administration of 500 μL (1×108 microbubbles) of contrast agent...
February 14, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28290183/synthesis-of-ultrasound-contrast-agents-characteristics-and-size-distribution-analysis-secondary-publication
#5
Hak Jong Lee, Tae-Jong Yoon, Young Il Yoon
Purpose: The purpose of this study was to establish a method for ultrasound (US) contrast agent synthesis and to evaluate the characteristics of the synthesized US contrast agent. Methods: A US contrast agent, composed of liposome and sulfur hexafluoride (SF6), was synthesized by dissolving 21 μmol 1,2-dihexadecanoyl-sn-glycero-3-phosphocholine (DPPC, C40H80NO8P), 9 μmol cholesterol, and 1.9 μmol of dihexadecylphosphate (DCP, [CH3(CH2)15O]2P(O)OH) in chloroform...
February 14, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28292005/current-status-of-musculoskeletal-application-of-shear-wave-elastography
#6
JeongAh Ryu, Woo Kyoung Jeong
Ultrasonography (US) is a very powerful diagnostic modality for the musculoskeletal system due to the ability to perform real-time dynamic high-resolution examinations with the Doppler technique. In addition to acquiring morphologic data, we can now obtain biomechanical information by quantifying the elasticity of the musculoskeletal structures with US elastography. The earlier diagnosis of degeneration and the ability to perform follow-up evaluations of healing and the effects of treatment are possible. US elastography enables a transition from US-based inspection to US-based palpation in order to diagnose the characteristics of tissue...
February 4, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28269978/differential-diagnosis-between-intraductal-papillary-mucinous-neoplasm-with-an-associated-invasive-carcinoma-and-pancreatic-ductal-adenocarcinoma-on-ultrasonography-the-utility-of-echo-intensity-and-contrast-enhancement
#7
Masato Saito, Naoki Hirokawa, Yoko Usami, Masanori Someya, Koh-Ichi Sakata
Purpose: The aim of this study was to investigate the utility of echo intensity and contrast enhancement in the differential diagnosis between intraductal papillary mucinous neoplasm with an associated invasive carcinoma (IPMN-IC) and pancreatic ductal adenocarcinoma (PDAC) on ultrasonography. Methods: This study included eight and 33 patients who had pathologically confirmed IPMN-IC and PDAC, respectively, and were enrolled for a comparative analysis of the sonographic features of the tumors...
February 4, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28260355/ultrasonography-of-the-lower-extremity-veins-anatomy-and-basic-approach
#8
Dong-Kyu Lee, Kyung-Sik Ahn, Chang Ho Kang, Sung Bum Cho
Ultrasonography is an imaging modality widely used to evaluate venous diseases of the lower extremities. It is important to understand the normal venous anatomy of the lower extremities, which has deep, superficial, and perforating venous components, in order to determine the pathophysiology of venous disease. This review provides a basic description of the anatomy of the lower extremity veins and useful techniques for approaching each vein via ultrasonography.
January 30, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28273696/comparison-of-the-severity-of-lower-extremity-arterial-disease-in-smokers-and-patients-with-diabetes-using-a-novel-duplex-doppler-scoring-system
#9
Rudresh Hiremath, Goutham Gowda, Jebin Ibrahim, Harish T Reddy, Haritha Chodiboina, Rushit Shah
Purpose: The aim of this study was to validate the diagnostic feasibility of a novel scoring system of peripheral arterial disease (PAD) in smokers and patients with diabetes depending on duplex Doppler sonographic features. Methods: Patients presenting with the symptomatology of PAD were divided into three groups: diabetes only, smoking only, and smokers with diabetes. The patients were clinically examined, a clinical severity score was obtained, and the subjects were categorized into the three extrapolated categories of mild, moderate, and severe...
January 25, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28228009/emergency-ultrasonography-of-the-gastrointestinal-tract-of-children
#10
Jae-Yeon Hwang
Ultrasonography (US) is widely used to evaluate most body parts in pediatric patients because it is simple, noninvasive, easy to use, and applicable in a wide variety of clinical situations. US is the modality of choice for the initial evaluation of acute abdominal pain in pediatric patients because of their small body habitus and the presence of less fat tissue in the abdominal wall and peritoneal cavity. The most important factor in performing pediatric emergency US is the graded compression technique and selection of the proper transducer...
January 25, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28219004/doppler-ultrasonography-of-the-lower-extremity-arteries-anatomy-and-scanning-guidelines
#11
Ji Young Hwang
Doppler ultrasonography of the lower extremity arteries is a valuable technique, although it is less frequently indicated for peripheral arterial disease than for deep vein thrombosis or varicose veins. Ultrasonography can diagnose stenosis through the direct visualization of plaques and through the analysis of the Doppler waveforms in stenotic and poststenotic arteries. To perform Doppler ultrasonography of the lower extremity arteries, the operator should be familiar with the arterial anatomy of the lower extremities, basic scanning techniques, and the parameters used in color and pulsed-wave Doppler ultrasonography...
January 18, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28222584/ultrasonographic-imaging-of-papillary-thyroid-carcinoma-variants
#12
Jung Hee Shin
Ultrasonography (US) is routinely used to evaluate thyroid nodules. The US features of papillary Epub ahead of print thyroid carcinoma (PTC), the most common thyroid malignancy, include hypoechogenicity, spiculated/microlobulated margins, microcalcifications, and a nonparallel orientation. However, many PTC variants have been identified, some of which differ from the classic type of PTC in terms of biological behavior and clinical outcomes. This review describes the US features and clinical implications of the variants of PTC...
January 12, 2017: Ultrasonography
https://www.readbyqxmd.com/read/27998053/ultrasonographic-findings-of-kikuchi-cervical-lymphadenopathy-in-children
#13
Ji Young Kim, Hyunju Lee, Bo La Yun
PURPOSE: The purpose of this study was to analyze the ultrasonographic (USG) findings of Kikuchi cervical lymphadenopathy in pediatric patients. METHODS: Between April 2007 and September 2016, 84 children (42 male and 42 female; mean±standard deviation age, 12.9±3.2 years; range, 5 to 18 years) confirmed with Kikuchi disease were enrolled. Clinical findings and USG findings of Kikuchi cervical lymphadenopathy were retrospectively reviewed. Localized symptoms, systemic symptoms, and laboratory findings including the white blood cell count, erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP) were analyzed...
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27998052/ultrasonography-how-to-raise-the-impact-factor
#14
Jeong-Sik Yu
No abstract text is available yet for this article.
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27956731/practical-and-illustrated-summary-of-updated-bi-rads-for-ultrasonography
#15
Jiyon Lee
The American College of Radiology released the fifth edition of the Breast Imaging-Reporting and Data System (BI-RADS) in 2014 (copyright 2013), which includes the expanded second edition of the ultrasound BI-RADS lexicon. This review provides a practical summary of the updated lexicon, including selective illustrations with original clinical images, a discussion of overarching concepts, and examples of current clinical applications.
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27784154/evaluation-of-factors-influencing-arterial-doppler-waveforms-in-an-in-vitro-flow-phantom
#16
Chang Kyu Sung, Kyoung Ho Lee, Seung Hyup Kim
PURPOSE: The aim of this study was to investigate factors that influence arterial Doppler waveforms in an in vitro phantom to provide a more accurate and comprehensive explanation of the Doppler signal. METHODS: A flow model was created using a pulsatile artificial heart, rubber or polyethylene tubes, a water tank, and a glass tube. Spectral Doppler tracings were obtained in multiple combinations of compliance, resistance, and pulse rate. Peak systolic velocity, minimum diastolic velocity, resistive index (RI), pulsatility index, early systolic acceleration time, and acceleration index were measured...
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27776402/the-value-of-intraoperative-ultrasonography-during-the-resection-of-relapsed-irradiated-malignant-gliomas-in-the-brain
#17
Kay Mursch, Martin Scholz, Wolfgang Brück, Julianne Behnke-Mursch
PURPOSE: The aim of this study was to investigate whether intraoperative ultrasonography (IOUS) helped the surgeon navigate towards the tumor as seen in preoperative magnetic resonance imaging and whether IOUS was able to distinguish between tumor margins and the surrounding tissue. METHODS: Twenty-five patients suffering from high-grade gliomas who were previously treated by surgery and radiotherapy were included. Intraoperatively, two histopathologic samples were obtained a sample of unequivocal tumor tissue (according to anatomical landmarks and the surgeon's visual and tactile impressions) and a small tissue sample obtained using a navigated needle when the surgeon decided to stop the resection...
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27764909/value-of-sagittal-color-doppler-ultrasonography-as-a-supplementary-tool-in-the-differential-diagnosis-of-fetal-cleft-lip-and-palate
#18
Myoung Seok Lee, Jeong Yeon Cho, Sang Youn Kim, Seung Hyup Kim, Joong Shin Park, Jong Kwan Jun
PURPOSE: The purpose of this study was to evaluate the feasibility and usefulness of sagittal color Doppler ultrasonography (CDUS) for the diagnosis of fetal cleft lip (CL) and cleft palate (CP). METHODS: We performed targeted ultrasonography on 25 fetuses with CL and CP, taking coronal and axial images of the upper lip and maxillary alveolar arch in each case. The existence of defects in and malalignment of the alveolus on the axial image, hard palate defects on the midsagittal image, and flow-through defects on CDUS taken during fetal breathing or swallowing were assessed...
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27599891/ultrasonographic-features-of-traumatic-neuromas-in-breast-cancer-patients-after-mastectomy
#19
Hwa Sung Sung, Young-Seon Kim
PURPOSE: The purpose of this study was to evaluate the ultrasonographic (US) features of traumatic neuromas in breast cancer patients after mastectomy. METHODS: This study was performed with approval from our Institutional Review Board, and the requirement for informed consent was waived. Six traumatic neuromas in five patients were included in this study. The US findings of traumatic neuromas were evaluated retrospectively by two radiologists according to the Breast Imaging-Reporting and Data System (BI-RADS) lexicon...
January 2017: Ultrasonography
https://www.readbyqxmd.com/read/27459989/shear-wave-elastography-using-ultrasound-effects-of-anisotropy-and-stretch-stress-on-a-tissue-phantom-and-in-vivo-reactive-lymph-nodes-in-the-neck
#20
Ha Young Lee, Jeong Hyun Lee, Ji Hoon Shin, So Yeon Kim, Hee Jung Shin, Jeong Seon Park, Young Jun Choi, Jung Hwan Baek
PURPOSE: The purpose of this study was to evaluate how the anisotropy and the static stretch stress of the cervical musculature influence the measured shear modulus in a tissue-mimicking phantom and in cervical lymph nodes in vivo by using shear wave elastography (SWE). METHODS: SWE was performed on a phantom using a pig muscle and on the middle jugular cervical lymph nodes in six volunteers. Tissue elasticity was quantified using the shear modulus and a supersonic shear wave imaging technique...
January 2017: Ultrasonography
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