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Ultrasonography

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https://www.readbyqxmd.com/read/27764908/which-supplementary-imaging-modality-should-be-used-for-breast-ultrasonography-comparison-of-the-diagnostic-performance-of-elastography-and-computer-aided-diagnosis
#1
Si Eun Lee, Ji Eun Moon, Yun Ho Rho, Eun-Kyung Kim, Jung Hyun Yoon
Purpose: The aim of this study was to evaluate and compare the diagnostic performance of grayscale ultrasonography (US), US elastography, and US computer-aided diagnosis (US-CAD) in the differential diagnosis of breast masses. Methods: A total of 193 breast masses in 175 consecutive women (mean age, 46.4 years) from June to August 2015 were included. US and elastography images were obtained and recorded. A US-CAD system was applied to the grayscale sonograms, which were automatically analyzed and visualized in order to generate a final assessment...
September 24, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27776401/assessing-the-blood-pressure-waveform-of-the-carotid-artery-using-an-ultrasound-image-processing-method
#2
Effat Soleimani, Manijhe Mokhtari-Dizaji, Nasser Fatouraee, Hazhir Saberi
Purpose: The aim of this study was to introduce and implement a noninvasive method to derive the carotid artery pressure waveform directly by processing diagnostic sonograms of the carotid artery. Methods: Ultrasound image sequences of 20 healthy male subjects (age, 36±9 years) were recorded during three cardiac cycles. The internal diameter and blood velocity waveforms were extracted from consecutive sonograms over the cardiac cycles by using custom analysis programs written in MATLAB...
September 20, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27764911/ultrasonographic-measurement-of-the-axillary-recess-thickness-in-an-asymptomatic-shoulder
#3
Gi-Young Park, Jin Hoon Lee, Dae Gil Kwon
Purpose: The purpose of this study was to measure the axillary recess (AR) thickness in an asymptomatic shoulder by using ultrasonography (US) and to analyze the factors affecting it. Methods: We recruited 141 patients (52 males; 89 females; age, 57.7±9.9 years) with unilateral shoulder pain and performed US on the unaffected shoulder. Two physiatrists measured the AR thickness of the unaffected shoulder independently. All patients were examined in an upright sitting position with 90° shoulder abduction...
September 19, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27669962/diagnostic-vascular-ultrasonography-with-the-help-of-color-doppler-and-contrast-enhanced-ultrasonography
#4
REVIEW
Johannes Rübenthaler, Maximilian Reiser, Dirk-André Clevert
The use of ultrasonography and especially of contrast-enhanced ultrasonography (CEUS) in the diagnosis of vascular pathologies before and after interventions has significantly increased over the past years due to the broader availability of modern ultrasound systems with CEUS capabilities and more trained user experience in this imaging modality. For the preinterventional and postinterventional work-up of carotid diseases, duplex ultrasound as well as CEUS have been established as the standard-of-care examination procedures for diagnosis, evaluation, and follow-up...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27669961/clinical-photoacoustic-imaging-of-cancer
#5
REVIEW
Keerthi S Valluru, Juergen K Willmann
Photoacoustic imaging is a hybrid technique that shines laser light on tissue and measures optically induced ultrasound signal. There is growing interest in the clinical community over this new technique and its possible clinical applications. One of the most prominent features of photoacoustic imaging is its ability to characterize tissue, leveraging differences in the optical absorption of underlying tissue components such as hemoglobin, lipids, melanin, collagen and water among many others. In this review, the state-of-the-art photoacoustic imaging techniques and some of the key outcomes pertaining to different cancer applications in the clinic are presented...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27599892/molecular-subtypes-and-imaging-phenotypes-of-breast-cancer
#6
REVIEW
Nariya Cho
During the last 15 years, traditional breast cancer classifications based on histopathology have been reorganized into the luminal A, luminal B, human epidermal growth factor receptor 2 (HER2), and basal-like subtypes based on gene expression profiling. Each molecular subtype has shown varying risk for progression, response to treatment, and survival outcomes. Research linking the imaging phenotype with the molecular subtype has revealed that non-calcified, relatively circumscribed masses with posterior acoustic enhancement are common in the basal-like subtype, spiculated masses with a poorly circumscribed margin and posterior acoustic shadowing in the luminal subtype, and pleomorphic calcifications in the HER2-enriched subtype...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27599890/applications-of-acoustic-radiation-force-impulse-quantification-in-chronic-kidney-disease-a-review
#7
REVIEW
Liang Wang
Acoustic radiation force impulse (ARFI) imaging is an emerging technique with great promise in the field of elastography. Previous studies have validated ARFI quantification as a method of estimating fibrosis in chronic liver disease. Similarly, fibrosis is the principal process underlying the progression of chronic kidney disease, which is the major cause of renal failure. However, the quantification of tissue stiffness using ARFI imaging is more complex in the kidney than in the liver. Moreover, not all previous studies are comparable because they employed different procedures...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27599889/preclinical-evaluation-of-acoustic-radiation-force-impulse-measurements-in-regions-of-heterogeneous-elasticity
#8
Katharina Hollerieth, Bernhard Gaßmann, Stefan Wagenpfeil, Philipp Moog, Minh-Truc Vo-Cong, Uwe Heemann, Konrad Friedrich Stock
PURPOSE: The purpose of this study was to compare the reliability of ultrasound-based shear wave elastography in regions of homogeneous versus heterogeneous elasticity by using two different probes. METHODS: Using acoustic radiation force impulse (ARFI) elastography, we measured the shear wave velocity (SWV) in different lesions of an elastography phantom with the convex 4C1 probe and the linear 9L4 probe. The region of interest (ROI) was positioned in such a way that it was partly filled by one of the lesions (0%, 25%, 50%, 75%, and 100%) and partly by the background of the phantom (100%, 75%, 50%, 25%, and 0%, respectively)...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27197842/theragnostic-ultrasound-using-microbubbles-in-the-treatment-of-prostate-cancer
#9
REVIEW
Hak Jong Lee, Young Il Yoon, Yun Jung Bae
The use of gas-filled microbubbles in perfusion monitoring as intravascular ultrasound contrast agents has recently become more common. Additionally, microbubbles are employed as carriers of pharmaceutical substances or genes. Microbubbles have great potential to improve the delivery of therapeutic materials into cells and to modify vascular permeability, causing increased extravasation of drugs and drug carriers. Prostate cancer is the most common neoplasm in Europe and America, with an incidence twice to three times that of lung and colorectal cancer...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27184655/validation-of-the-fifth-edition-bi-rads-ultrasound-lexicon-with-comparison-of-fourth-and-fifth-edition-diagnostic-performance-using-video-clips
#10
Jung Hyun Yoon, Min Jung Kim, Hye Sun Lee, Sung Hun Kim, Ji Hyun Youk, Sun Hye Jeong, You Me Kim
PURPOSE: The aim of this study was to evaluate the positive predictive value (PPV) and the diagnostic performance of the ultrasonographic descriptors in the fifth edition of BI-RADS, comparing with the fourth edition using video clips. METHODS: From September 2013 to July 2014, 80 breast masses in 74 women (mean age, 47.5±10.7 years) from five institutions of the Korean Society of Breast Imaging were included. Two radiologists individually reviewed the static and video images and analyzed the images according to the fourth and fifth edition of BI-RADS...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27184653/synchronous-multicentric-small-hepatocellular-carcinomas-defining-the-capsule-on-high-frequency-intraoperative-ultrasonography-with-pathologic-correlation
#11
Jae Hong Ahn, Dae-Woon Eom, Dae Shick Ryu, Man Soo Park, Seung Mun Jung, Kun Moo Choi, Gab Jin Cheon, Soo-Jung Choi, Hyuk Jai Jang
PURPOSE: The aim of this study was to define the capsules of synchronous multicentric small hepatocellular carcinomas (HCCs) with use of high-frequency intraoperative ultrasonography (IOUS). METHODS: Among the 131 consecutive patients undergoing hepatic resection and high-frequency IOUS for HCC, 16 synchronous multicentric small HCCs in 13 patients were histologically diagnosed in the resected specimens. High-frequency IOUS and pathologic findings of these lesions were compared, with particular focus on the presence and appearance of the capsule in or around each lesion...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27184652/malignant-looking-thyroid-nodules-with-size-reduction-core-needle-biopsy-results
#12
Ha Young Lee, Jung Hwan Baek, Eun Ju Ha, Jee Won Park, Jeong Hyun Lee, Dong Eun Song, Young Kee Shong
PURPOSE: The aim of this study was to evaluate whether malignant-looking thyroid nodules with size reduction were malignant or not. METHODS: From November 2010 to July 2011, we retrospectively enrolled 16 patients with 16 nodules (11 females and five males; mean age, 55 years) who underwent core needle biopsy (CNB), and whose thyroid nodules had malignant ultrasonographic (US) features, although they showed size reduction (>20% decrease in maximum diameter) during the follow-up period (mean, 37±27 months)...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27101982/giant-hypothalamic-hamartoma-associated-with-an-intracranial-cyst-in-a-newborn
#13
Joo Yeon Lee, Hye-Kyung Yoon, Shin Kwang Khang
We report the case of a giant hypothalamic hamartoma with a large intracranial cyst in a neonate. On ultrasonography, the lesion presented as a lobulated, mass-like lesion with similar echogenicity to the adjacent brain parenchyma, located anterior to the underdeveloped and compressed left temporal lobe, and presenting as an intracranial cyst in the left cerebral convexity without definite internal echogenicity or septa. The presence of a hypothalamic hamartoma and intracranial neurenteric cyst were confirmed by surgical biopsy...
October 2016: Ultrasonography
https://www.readbyqxmd.com/read/27764910/magnetic-resonance-imaging-and-pathological-characteristics-of-pure-mucinous-carcinoma-in-the-breast-according-to-echogenicity-on-ultrasonography
#14
Young Gyung Shin, Eun-Kyung Kim, Min Jung Kim, Jung Hyun Yoon, Hee Jung Moon
Purpose: The aim of this study was to explore the clinical and pathological characteristics of pure mucinous breast carcinoma (PMBC) according to internal echogenicity on ultrasonography (US). Methods: Thirty-three patients with PMBC diagnosed at surgery were included in this study. Cases of PMBC were classified according to internal echogenicity on US. The imaging features on magnetic resonance (MR) imaging and clinicohistopathological characteristics were compared between the hypoechogenic and the isoechogenic to hyperechogenic groups...
August 29, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27776402/the-value-of-intraoperative-ultrasonography-during-the-resection-of-relapsed-irradiated-malignant-gliomas-in-the-brain
#15
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...
August 8, 2016: 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
#16
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...
August 6, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27599891/ultrasonographic-features-of-traumatic-neuromas-in-breast-cancer-patients-after-mastectomy
#17
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...
July 18, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27784154/evaluation-of-factors-influencing-arterial-doppler-waveforms-in-an-in-vitro-flow-phantom
#18
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...
July 7, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27214660/new-endoscopic-ultrasonography-techniques-for-pancreaticobiliary-diseases
#19
REVIEW
Ken Kamata, Masayuki Kitano, Shunsuke Omoto, Kumpei Kadosaka, Takeshi Miyata, Kosuke Minaga, Kentaro Yamao, Hajime Imai, Masatoshi Kudo
Endoscopic ultrasonography (EUS) is widely used to evaluate pancreaticobiliary diseases, especially pancreatic masses. EUS has a good ability to detect pancreatic masses, but it is not sufficient for the differential diagnosis of various types of lesions. In order to address the limitations of EUS, new techniques have been developed to improve the characterization of the lesions detected by EUS. EUS-guided fine needle aspiration (EUS-FNA) has been used for diagnosing pancreatic tumors. In order to improve the histological diagnostic yield, a EUS-FNA needle with a core trap has recently been developed...
July 2016: Ultrasonography
https://www.readbyqxmd.com/read/27184654/measurement-of-elasticity-of-normal-placenta-using-the-virtual-touch-quantification-technique
#20
Size Wu, Ruixia Nan, Yueping Li, Xiaojing Cui, Xian Liang, Yanan Zhao
PURPOSE: The aim of this study was to measure the elasticity of normal placentas using the Virtual Touch quantification (VTQ) technique. METHODS: This study was approved by the Institutional Ethics Committee. Fifty randomly selected, healthy pregnant women in their second trimester and 50 randomly selected, healthy pregnant women in their third trimester with a single fetus were included, and their placentas underwent VTQ through shear wave velocity (SWV) measurements...
July 2016: Ultrasonography
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