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Contrast ultrasound

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https://www.readbyqxmd.com/read/29052791/potential-diagnostic-performance-of-contrast-enhanced-ultrasound-and-tumor-markers-in-differentiating-combined-hepatocellular-cholangiocarcinoma-from-hepatocellular-carcinoma-and-cholangiocarcinoma
#1
Xiao-Wen Huang, Yang Huang, Li-da Chen, Zhu Wang, Zheng Yang, Jin-Ya Liu, Xiao-Yan Xie, Ming-De Lu, Shun-Li Shen, Wei Wang
PURPOSE: To evaluate the diagnostic performance of the combination of tumor markers [alpha-fetoprotein (AFP) and carbohydrate antigen 19-9 (CA19-9)] and imaging features in differentiating combined hepatocellular-cholangiocarcinoma (CHC) from hepatocellular carcinoma (HCC) and cholangiocarcinoma (CC). METHODS: Forty consecutive patients with pathologically proven CHC were retrospectively evaluated with contrast-enhanced ultrasound (CEUS). Additionally, 40 HCC and 40 CC patients who were randomly selected from the same period served as a control group...
October 20, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/29052046/headache-and-pregnancy-a-systematic-review
#2
A Negro, Z Delaruelle, T A Ivanova, S Khan, R Ornello, B Raffaelli, A Terrin, U Reuter, D D Mitsikostas
This systematic review summarizes the existing data on headache and pregnancy with a scope on clinical headache phenotypes, treatment of headaches in pregnancy and effects of headache medications on the child during pregnancy and breastfeeding, headache related complications, and diagnostics of headache in pregnancy. Headache during pregnancy can be both primary and secondary, and in the last case can be a symptom of a life-threatening condition. The most common secondary headaches are stroke, cerebral venous thrombosis, subarachnoid hemorrhage, pituitary tumor, choriocarcinoma, eclampsia, preeclampsia, idiopathic intracranial hypertension, and reversible cerebral vasoconstriction syndrome...
October 19, 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/29051395/role-of-computer-tomography-and-endoscopic-ultrasonography-in-assessing-portal-and-superior-mesenteric-vessels-invasion-in-cephalo-pancreatic-adenocarcinoma
#3
Raluca Bodea, Andrada Seicean, Tudor Vasile, Tudor Calinici, Irina Ciuca, Nadim Al Hajjar, Cornel Iancu, Constantin Iordache
AIM: The aim of this study is to evaluate the information given by contrast-enhanced computer tomography (CECT) and ultrasound endoscopy (EUS) regarding vascular involvement of cephalo-pancreatic cancer, data compared with intraoperative findings. MATERIAL AND METHODS: We choose to analyze the most often interested vessels by tumor development, such as superior mesenteric artery (SMA), superior mesenteric vein (SMV) and portal vein (PV). The patients included in the study (n=425) had a cephalo-pancreatic tumor diagnosed in our Institute and a positive histology for pancreatic adenocarcinoma...
2017: Annali Italiani di Chirurgia
https://www.readbyqxmd.com/read/29050329/differentiation-between-high-and-low-grade-urothelial-carcinomas-using-contrast-enhanced-ultrasound
#4
Qiuyang Li, Jie Tang, Enhui He, Yanmi Li, Yun Zhou, Baojun Wang
PURPOSE: To evaluate the value of contrast-enhanced ultrasonography (CEUS) in the differentiation of high and low grade urothelial carcinoma. MATERIALS AND METHODS: 192 with 192 bladder lesions, including 110 high grade urothelial carcinoma and 82 low grade urothelial carcinoma were examined by CEUS. Among 192 tumors, enhancement patterns of 96 tumors between August 2010 and December 2012 were analyzed retrospectively. Then from January 2013 to April 2015, compared with CEUS was performed on 96 tumors for prospective differential diagnosis...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29048943/prognostic-value-of-the-combination-of-serum-levels-of-vascular-endothelial-growth-factor-c-reactive-protein-and-contrast-enhanced-ultrasound-in-patients-with-primary-liver-cancer-who-underwent-transcatheter-arterial-chemoembolization
#5
Zhi-Dong Xuan, Li Zhou, Yu Wang, Xue Zheng
BACKGROUND: This study aimed to evaluate the prognostic value of the combination of serum levels of vascular endothelial growth factor (VEGF), C-reactive protein (CRP), and contrast-enhanced ultrasound (CEUS) in patients with primary liver cancer (PLC) after transcatheter arterial chemoembolization (TACE). RESEARCH DESIGN AND METHODS: Overall, 287 PLC patients who had undergone TACE were allocated into recurrence and non-recurrence groups. One day before and seven days after TACE, CEUS was performed, and serum VEGF and CRP levels were determined...
October 19, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/29046597/ultrasound-tomography-imaging-with-waveform-sound-speed-parenchymal-changes-in-women-undergoing-tamoxifen-therapy
#6
Mark Sak, Neb Duric, Peter Littrup, Mark Sherman, Gretchen Gierach
Ultrasound tomography (UST) is an emerging modality that can offer quantitative measurements of breast density. Recent breakthroughs in UST image reconstruction involve the use of a waveform reconstruction as opposed to a ray-based reconstruction. The sound speed (SS) images that are created using the waveform reconstruction have a much higher image quality. These waveform images offer improved resolution and contrasts between regions of dense and fatty tissues. As part of a study that was designed to assess breast density changes using UST sound speed imaging among women undergoing tamoxifen therapy, UST waveform sound speed images were then reconstructed for a subset of participants...
March 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29044926/optical-coherence-tomography-guided-carotid-artery-stent-procedure-technique-and-potential-applications
#7
Suhail Dohad, Alexander Zhu, Sandeep Krishnan, Frances Wang, Serena Wang, Justin Cox, Timothy D Henry
OBJECTIVES: To (1) present a guide on how to perform optical coherence tomography (OCT) in carotid artery stenting (CAS), to (2) highlight several instructive cases illustrating OCT-guidance as an interventional strategy, and to (3) present the largest case-series of OCT-guided CAS performed in North America, demonstrating its feasibility as an imaging modality in this setting. BACKGROUND: OCT is an intravascular imaging method that captures images with an axial resolution 10 times higher than intravascular ultrasound...
October 16, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29044439/liver-masses-what-physicians-need-to-know-about-ordering-and-interpreting-liver-imaging
#8
REVIEW
Arman Sheybani, Ron C Gaba, R Peter Lokken, Senta M Berggruen, Winnie A Mar
PURPOSE OF REVIEW: This paper reviews diagnostic imaging techniques used to characterize liver masses and the imaging characteristics of the most common liver masses. RECENT FINDINGS: The role of recently adopted ultrasound and magnetic resonance imaging contrast agents will be emphasized. Contrast-enhanced ultrasound is an inexpensive exam which can confirm benignity of certain liver masses without ionizing radiation. Magnetic resonance imaging using hepatocyte-specific gadolinium-based contrast agents can help confirm or narrow the differential diagnosis of liver masses...
October 18, 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/29044154/cryo-em-visualization-of-lipid-and-polymer-stabilized-perfluorocarbon-gas-nanobubbles-a-step-towards-nanobubble-mediated-drug-delivery
#9
Christopher Hernandez, Sahil Gulati, Gabriella Fioravanti, Phoebe L Stewart, Agata A Exner
Gas microbubbles stabilized with lipids, surfactants, proteins and/or polymers are widely used clinically as ultrasound contrast agents. Because of their large 1-10 µm size, applications of microbubbles are confined to the blood vessels. Accordingly, there is much interest in generating nanoscale echogenic bubbles (nanobubbles), which can enable new uses of ultrasound contrast agents in molecular imaging and drug delivery, particularly for cancer applications. While the interactions of microbubbles with ultrasound have been widely investigated, little is known about the activity of nanobubbles under ultrasound exposure...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29042977/contrast-enhanced-ultrasound-with-a-novel-nanoparticle-contrast-agent-for-clinical-diagnosis-in-patients-with-non-small-cell-lung-cancer
#10
Na Li, Lu Han, Hui Jing
Non-small cell lung cancer (NSCLC) initiates in the non-small cells of the lung and is one of the most common types of human cancer. It is known for its rapid growth, easy migration, invasion and reoccurrence, and has the highest incidence rate of all types of cancer. Early detection of NSCLC is difficult to achieve and this is the primary reason for low survival rates in NSCLC. Contrast-enhanced ultrasound is the most common application for evaluating patients diagnosed with NSCLC. In the present study, a contrast-enhanced ultrasound combined with nanoparticles was performed with the aim of identifying patients with NSCLC at an early stage...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29041174/miniature-all-optical-probe-for-large-synthetic-aperture-photoacoustic-ultrasound-imaging
#11
Guangyao Li, Zhendong Guo, Sung-Liang Chen
A miniature all-optical probe for high-resolution photoacoustic (PA)-ultrasound (US) imaging using a large synthetic aperture is developed. The probe consists of three optical fibers for PA excitation, US generation, and detection of acoustic waves, respectively. The fiber for PA excitation has a large numerical aperture (NA) for wide-angle laser illumination. On the other hand, the fiber with a carbon black-polydimethylsiloxane composite coated on the end face of the optical fiber is used for wide-angle US transmission through laser-US conversion...
October 16, 2017: Optics Express
https://www.readbyqxmd.com/read/29040981/abdominal-ultrasound-findings-of-tumor-forming-hepatic-malignant-lymphoma
#12
Shogo Kitahata, Atsushi Hiraoka, Masatoshi Kudo, Taisei Murakami, Marie Ochi, Hirofumi Izumoto, Hidetaro Ueki, Miho Kaneto, Toshihiko Aibiki, Tomonari Okudaira, Hiroka Yamago, Yuji Miyamoto, Ryuichiro Iwasaki, Hideomi Tomida, Kenichiro Mori, Masato Kishida, Hideki Miyata, Eiji Tsubouchi, Masashi Hirooka, Yohei Koizumi, Tomoyuki Ninomiya, Yoichi Hiasa, Kojiro Michitaka
AIM/BACKGROUND: Evaluations of abdominal ultrasonography (US) findings of primary and secondary tumor-forming hepatic malignant lymphoma (HML) have not been adequately reported. In this study, we elucidated US and contrast-enhanced US (CEUS) findings in patients with HML. MATERIALS/METHODS: From January 2006 to March 2017, 25 patients with HML were enrolled (primary 7, secondary 18), each of whom was diagnosed pathologically. They were divided into 2 groups based on tumor diameter (cutoff, 30 mm)...
2017: Digestive Diseases
https://www.readbyqxmd.com/read/29039113/a-gastric-glomus-tumor-resected-using-non-exposed-endoscopic-wall-inversion-surgery
#13
Masahide Ebi, Tomoya Sugiyama, Kazuhiro Yamamoto, Takuya Saito, Tadahisa Inoue, Yoshiharu Yamaguchi, Yasuhiro Tamura, Shinya Izawa, Yasutaka Hijikata, Yasushi Funaki, Naotaka Ogasawara, Makoto Sasaki, Kunio Kasugai
Gastric glomus tumors are extremely rare, constituting approximately 1% of gastric mesenchymal tumors. We report the case of a 45-year-old female patient in whom upper gastrointestinal endoscopy revealed a 3-cm submucosal tumor with a bridging fold in the posterior wall of the antrum of the stomach. Contrast-enhanced computed tomography revealed the tumor to be hypervascular in the arterial phase and exhibit continuous enhancement in the post-venous phase. Dynamic contrast-enhanced magnetic resonance imaging showed that the tumor was hypervascular in the early phase and persistently enhanced in the late phase...
October 16, 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/29037844/clinical-application-of-contrast-enhanced-ultrasound-using-high-frequency-linear-probe-in-the-detection-of-small-colorectal-liver-metastases
#14
Si Qin, Yao Chen, Xiao-Yin Liu, Wen-Jie Cheng, Jun-Li Yu, Wen-Jing Zhang, Qing-Ling Jiang, Yi-Min Wang, Yan-Ling Wen, Guang-Jian Liu
To compare the performance of contrast-enhanced ultrasound (CEUS) using high-frequency linear and convex probes in the detection of small colorectal liver metastases (CRLMs). A total of 85 patients with 143 small CRLMs were evaluated. High-frequency ultrasound (US) and CEUS detected significantly more superficial lesions within 60 mm below the skin than a convex probe (p <0.05). The detection rate decreased in the chemotherapy group, especially when using a convex probe for US (p <0.05). By combining convex and linear probes, detection rates of US and CEUS were significantly higher than that of a convex or a linear probe alone (p <0...
October 13, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29037843/spatio-temporal-flow-and-wall-shear-stress-mapping-based-on-incoherent-ensemble-correlation-of-ultrafast-contrast-enhanced-ultrasound-images
#15
Chee Hau Leow, Meng-Xing Tang
In this study, a technique for high-frame-rate ultrasound imaging velocimetry (UIV) is extended first to provide more robust quantitative flow velocity mapping using ensemble correlation of images without coherent compounding, and second to generate spatio-temporal wall shear stress (WSS) distribution. A simulation model, which couples the ultrasound simulator with analytical flow solution, was implemented to evaluate its accuracy. It is shown that the proposed approach can reduce errors in velocity estimation by up to 10-fold in comparison with the coherent correlation approach...
October 13, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29036794/assessing-the-effect-of-different-operation-techniques-on-postoperative-duplex-ultrasound-quality-after-carotid-endarterectomy
#16
E Grambow, T Heller, P Wieneke, C Weiß, E Klar, M Weinrich
BACKGROUND: Duplex ultrasound is the first choice in diagnostics and surveillance of stenoses of the internal carotid arteries before and even after surgery. Therefore, the quality of duplex ultrasound is crucial to investigate these vascular pathologies. OBJECTIVE: Aim of this study was the evaluation whether different surgical techniques affect the postoperative quality of duplex ultrasound. METHODS: In a time period from January to May 2015 duplex ultrasound of the cervical vessels was performed in 75 patients after unilateral endarterectomy of the internal carotid artery at our department between 2006 and 2012...
October 7, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29035216/spiral-flow-phantom-for-ultrasound-flow-imaging-experimentation
#17
Billy Y S Yiu, Alfred C H Yu
As new ultrasound flow imaging methods are being developed, there is a growing need to devise appropriate flow phantoms that can holistically assess the accuracy of the derived flow estimates. In this paper, we present a novel spiral flow phantom design whose Archimedean spiral lumen naturally gives rise to multi-directional flow over all possible angles (i.e. from 0° to 360°). Developed using lost-core casting principles, the phantom geometry comprised a three-loop spiral (4 mm diameter, 5 mm pitch), and it was set to operate in steady flow mode (3 mL/s flow rate)...
October 13, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29034168/quantitative-comparison-of-pzt-and-cmut-probes-for-photoacoustic-imaging-experimental-validation
#18
Maëva Vallet, François Varray, Jérôme Boutet, Jean-Marc Dinten, Giosuè Caliano, Alessandro Stuart Savoia, Didier Vray
Photoacoustic (PA) signals are short ultrasound (US) pulses typically characterized by a single-cycle shape, often referred to as N-shape. The spectral content of such wideband signals ranges from a few hundred kilohertz to several tens of megahertz. Typical reception frequency responses of classical piezoelectric US imaging transducers, based on PZT technology, are not sufficiently broadband to fully preserve the entire information contained in PA signals, which are then filtered, thus limiting PA imaging performance...
December 2017: Photoacoustics
https://www.readbyqxmd.com/read/29033431/diagnostic-challenge-in-pancreatic-sarcoidosis-using-endoscopic-ultrasonography
#19
Nobuaki Azemoto, Teru Kumagi, Mitsuhito Koizumi, Taira Kuroda, Hirofumi Yamanishi, Yoshinori Ohno, Yoshiki Imamura, Eiji Takeshita, Yoshiko Soga, Yoshiou Ikeda, Morikazu Onji, Yoichi Hiasa
We herein report a 55-year-old woman who presented with erythema and bilateral hilar lymphadenopathy 4 months prior to the detection of pancreatic lesions on an ultrasound. A skin biopsy showed evidence of sarcoidosis. The largest lesion in the tail of the pancreas was hypoechoic on endoscopic ultrasonography (EUS). The lesion was initially iso-enhanced on contrast enhanced-EUS (CE-EUS) but subsequently became hypoenhanced. The lesion revealed heterogeneous components of both soft and hard tissue on EUS elastography...
October 16, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29031027/evaluation-of-renal-perfusion-in-hyperthyroid-cats-before-and-after-radioiodine-treatment
#20
E Stock, S Daminet, D Paepe, E Buresova, E Vandermeulen, P Smets, L Duchateau, J H Saunders, K Vanderperren
BACKGROUND: Hyperthyroidism and chronic kidney disease (CKD) are common in elderly cats. Consequently, both diseases often occur concurrently. Furthermore, renal function is affected by thyroid status. Because changes in renal perfusion play an important role in functional renal changes in hyperthyroid cats, investigation of renal perfusion may provide novel insights. OBJECTIVES: To evaluate renal perfusion in hyperthyroid cats with contrast-enhanced ultrasound (CEUS)...
October 14, 2017: Journal of Veterinary Internal Medicine
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