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Contrast enhanced ultrasound

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https://www.readbyqxmd.com/read/28077898/quality-improvement-of-liver-ultrasound-images-using-fuzzy-techniques
#1
Azadeh Bayani, Mostafa Langarizadeh, Amir Reza Radmard, Ahmadreza Farzaneh Nejad
BACKGROUND: Liver ultrasound images are so common and are applied so often to diagnose diffuse liver diseases like fatty liver. However, the low quality of such images makes it difficult to analyze them and diagnose diseases. The purpose of this study, therefore, is to improve the contrast and quality of liver ultrasound images. METHODS: In this study, a number of image contrast enhancement algorithms which are based on fuzzy logic were applied to liver ultrasound images - in which the view of kidney is observable - using Matlab2013b to improve the image contrast and quality which has a fuzzy definition; just like image contrast improvement algorithms using a fuzzy intensification operator, contrast improvement algorithms applying fuzzy image histogram hyperbolization, and contrast improvement algorithms by fuzzy IF-THEN rules...
December 2016: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28072576/ultrasonic-computed-tomography-imaging-of-iron-oxide-nanoparticles
#2
Or Perlman, Haim Azhari
Iron oxide nanoparticles (IONPs) are becoming increasingly used and intensively investigated in the field of medical imaging. They are currently FDA approved for magnetic resonance imaging (MRI), and it would be highly desirable to visualize them by ultrasound as well. Previous reports using the conventional ultrasound B-scan (pulse-echo) imaging technique have shown very limited detectability of these particles. The aim of this study is to explore the feasibility of imaging IONPs using the through-transmission ultrasound methodology and demonstrate their detectability using ultrasonic computed tomography (UCT)...
January 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28072475/safety-of-sulfur-hexafluoride-microbubbles-in-sonography-of-abdominal-and-superficial-organs-retrospective-analysis-of-30-222-cases
#3
Chunlin Tang, Kejing Fang, Yanli Guo, Rui Li, Xiaozhou Fan, Ping Chen, Zhaohui Chen, Qiangwei Liu, Ye Zou
OBJECTIVES: The purpose of this study was to investigate the safety of the sulfur hexafluoride microbubble contrast agent SonoVue (Bracco SpA, Milan, Italy) and to implement precautions with the intent of further improving the safety of this contrast agent. METHODS: A total of 30,222 patients undergoing contrast-enhanced sonography of abdominal and superficial organs in our hospital from January 2005 to December 2014 were retrospectively investigated. SonoVue was used as the ultrasound contrast agent...
January 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28071288/vulnerable-carotid-plaque-imaging-and-histopathology-without-a-dedicated-mri-receiver-coil
#4
Laura A Fitzpatrick, Nadav Berkovitz, Marlise P Dos Santos, Nevin Majeed, Rafael Glikstein, Santanu Chakraborty, John P Veinot, Grant Stotts, Alain Berthiaume, Robert Chatelain
Stroke is associated with vulnerable carotid artery plaques showing specific histopathologic features, namely a lipid-rich necrotic core, intraplaque hemorrhage, ulceration, and thin fibrous cap. While ultrasound and computed tomography (CT) can identify carotid plaques and determine the extent of stenosis, magnetic resonance imaging (MRI) provides further information regarding plaque composition and morphology. In this feasibility study, three patients with symptomatic, moderately stenosed plaques were imaged with CT angiography (CTA) and MRI (3T and 1...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28069288/diagnostic-imaging-of-the-hepatobiliary-system-an-update
#5
REVIEW
Angela J Marolf
Recent advances in diagnostic imaging of the hepatobiliary system include MRI, computed tomography (CT), contrast-enhanced ultrasound, and ultrasound elastography. With the advent of multislice CT scanners, sedated examinations in veterinary patients are feasible, increasing the utility of this imaging modality. CT and MRI provide additional information for dogs and cats with hepatobiliary diseases due to lack of superimposition of structures, operator dependence, and through intravenous contrast administration...
January 6, 2017: Veterinary Clinics of North America. Small Animal Practice
https://www.readbyqxmd.com/read/28069193/safety-of-ultrasound-guided-high-intensity-focused-ultrasound-ablation-for-diffuse-adenomyosis-a-retrospective-cohort-study
#6
Yujie Feng, Liang Hu, Wenzhi Chen, Rong Zhang, Xi Wang, Jinyun Chen
OBJECTIVES: To evaluate the safety of ultrasound-guided high-intensity focused ultrasound (HIFU) ablation for patients with diffuse adenomyosis. METHODS: This was a retrospective cohort study. The data was collected from 417 symptomatic adenomyosis patients who underwent ultrasound-guided HIFU between January 2012 and December 2015 at 1st Affiliated Hospital of Chongqing Medical University, Chongqing, China. Among them were 260 patients with diffuse adenomyosis (Group D) and 157 patients with focal adenomyosis (Group F)...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28068874/short-lag-spatial-coherence-ultrasound-imaging-with-adaptive-synthetic-transmit-aperture-focusing
#7
Jinxin Zhao, Yuanyuan Wang, Jinhua Yu, Wei Guo, Shun Zhang, Saeid Aliabadi
The short-lag spatial coherence (SLSC) imaging has been demonstrated to be advantageous over the traditional B-mode ultrasound imaging. With focused scanning beams, the SLSC imaging has an excellent performance in clutter reduction and lesion detection, especially in the low signal-to-noise ratio (SNR) scenarios. The synthetic aperture (SA) imaging is an appropriate mode for the SLSC imaging as the dynamic transmit focusing could keep a good focusing quality at any depth. However, the SLSC image may still suffer a bad resolution performance when a low lag value is used in the coherence summation to ensure the contrast enhancement...
January 1, 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28067975/assessment-of-acute-thermal-damage-volumes-in-muscle-using-magnetization-prepared-3d-t2-weighted-imaging-following-mri-guided-high-intensity-focused-ultrasound-therapy
#8
Robert M Staruch, Joris Nofiele, Jamie Walker, Chenchen Bing, Ananth J Madhuranthakam, April Bailey, Young-Sun Kim, Avneesh Chhabra, Dennis Burns, Rajiv Chopra
PURPOSE: To evaluate magnetization-prepared 3D T2 -weighted magnetic resonance imaging (MRI) measurements of acute tissue changes produced during ablative MR high-intensity focused ultrasound (MR-HIFU) exposures. MATERIALS AND METHODS: A clinical MR-HIFU system (3T) was used to generate thermal lesions (n = 24) in the skeletal muscles of three pigs. T1 -weighted, 2D T2 -weighted, and magnetization-prepared 3D T2 -weighted sequences were acquired before and after therapy to evaluate tissue changes following ablation...
January 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28067009/one-step-3d-tv-hysterosalpingo-foam-sonography-3d-tv-hyfosy-confirmation-test-for-essure%C3%A2-follow-up-a-multicenter-study
#9
Brunella Zizolfi, Lucia Lazzeri, Mario Franchini, Attilio Di Spiezio Sardo, Carmine Nappi, Emilio Piccione, Caterina Exacoustos
OBJECTIVE: To evaluate the feasibility and accuracy of a three-dimensional-transvaginal-hysterosalpingo-contrast-sonography using the new dedicated contrast-enhanced gel foam (3D-TV-HyFoSy) to assess the position of the tubal sterilization Essure® devices and consequent tubal occlusion in patients who underwent Essure® hysteroscopic tubal sterilization. METHODS: This multicenter study was prospectively conducted from June 2012 to July 2014 in four italian centers and included 50 women who underwent hysteroscopic Essure® microinsert placement, for a total of 95 tubes...
January 9, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28063693/identification-of-suspected-hepatocellular-carcinoma-with-contrast-enhanced-ultrasound
#10
Judy H Squires, Amber Bill, Jessica Thieret, James E Squires
No abstract text is available yet for this article.
January 4, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28063077/automatic-gallbladder-and-gallstone-regions-segmentation-in-ultrasound-image
#11
Jing Lian, Yide Ma, Yurun Ma, Bin Shi, Jizhao Liu, Zhen Yang, Yanan Guo
PURPOSE: As gallbladder diseases including gallstone and cholecystitis are mainly diagnosed by using ultra-sonographic examinations, we propose a novel method to segment the gallbladder and gallstones in ultrasound images. METHODS: The method is divided into five steps. Firstly, a modified Otsu algorithm is combined with the anisotropic diffusion to reduce speckle noise and enhance image contrast. The Otsu algorithm separates distinctly the weak edge regions from the central region of the gallbladder...
January 6, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28060884/contrast-enhanced-ultrasound-with-vegfr2-targeted-microbubbles-for-monitoring-regorafenib-therapy-effects-in-experimental-colorectal-adenocarcinomas-in-rats-with-dce-mri-and-immunohistochemical-validation
#12
Ralf Stefan Eschbach, Dirk-Andre Clevert, Heidrun Hirner-Eppeneder, Michael Ingrisch, Matthias Moser, Jessica Schuster, Dina Tadros, Moritz Schneider, Philipp Maximilian Kazmierczak, Maximilian Reiser, Clemens C Cyran
OBJECTIVES: To investigate contrast-enhanced ultrasound (CEUS) with VEGFR2-targeted microbubbles for monitoring therapy effects of regorafenib on experimental colon carcinomas in rats with correlation to dynamic contrast-enhanced MRI (DCE-MRI) and immunohistochemistry. MATERIALS AND METHODS: Human colorectal adenocarcinoma xenografts (HT-29) were implanted subcutaneously in n = 21 (n = 11 therapy group; n = 10 control group) female athymic nude rats (Hsd: RH-Foxn1rnu)...
2017: PloS One
https://www.readbyqxmd.com/read/28054404/improving-conspicuity-of-the-canine-gastrointestinal-wall-using-dual-phase-contrast-enhanced-computed-tomography-a-retrospective-cross-sectional-study
#13
Ella Fitzgerald, Richard Lam, Randi Drees
Gastrointestinal (GI) disease is a common clinical complaint in small animal patients; computed tomography (CT) examinations enable a global overview of the GI tract and associated structures. Previously, the GI wall has been reportedly identified from serosa to mucosa in 77% of standard postcontrast CT studies and wall layers seen in ultrasound have not been distinguished. Inconsistent strong contrast enhancement of the inner layer of the GI mucosal surface was noted on dual phase CT studies acquired in our institution, which increased the visibility of the GI tract and disease processes...
January 5, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28054258/transduodenal-ampullectomy-for-ampullary-tumors
#14
Verushka M Mansukhani, Gunjan S Desai, Sasi Mouli, Keval Shirodkar, Rajiv C Shah, Jagannath Palepu
Transduodenal ampullectomy (TDA) is indicated for large ampullary tumors, for presence of dysplasia on endoscopic biopsy, for poor surgical candidates for pancreaticoduodenectomy, and in cases not indicated for endoscopic ampullectomy. Retrospective review of data from 2009 to 2015 revealed 11 patients who underwent TDA. Magnetic resonance imaging cholangiopancreatography (MRI-MRCP), contrast-enhanced computed tomography (CECT) scan, side-viewing endoscopy, and endoscopic ultrasound (EUS) were used for investigating the patients as required...
January 5, 2017: Indian Journal of Gastroenterology: Official Journal of the Indian Society of Gastroenterology
https://www.readbyqxmd.com/read/28052301/c-arm-cone-beam-computed-tomography-guidance-for-radiofrequency-ablation-in-hepatocellular-carcinoma
#15
Keizo Kato, Hiroshi Abe, Makiko Ika, Takeshi Yonezawa, Yoshiyuki Sato, Noriko Hanawa, Shohei Shimizu, Shinji Endo, Ryota Matsuo, Akihito Tsubota
OBJECTIVE: To assess the usefulness of C-arm cone beam computed tomography (CBCT) combined with ultrasound for the treatment of hepatocellular carcinoma (HCC) by radiofrequency ablation (RFA). METHODS: Patients underwent RFA following transcatheter arterial chemoembolization (TACE) or RFA alone under ultrasound or CBCT guidance combined with ultrasound-based techniques. They were divided into 2 groups based on the use (C group) and nonuse (NC group) of CBCT guidance...
January 5, 2017: Oncology
https://www.readbyqxmd.com/read/28050443/abdominal-necrotising-fascitis-mimicking-peritonitis-in-a-gatka-playing-indian-male-a-case-report
#16
Sonika Jha, Devinder Pal Singh
The present case report is of abdominal Necrotising Fascitis in a young Gatka player. The patient was clinically diagnosed to have peritonitis with plan for laparotomy but since ultrasound abdomen showed no free intra-abdominal fluid and any other pathology a Contrast Enhanced Computed tomography (CECT) abdomen was done. CECT showed fluid collections in rectus sheath and superficial fascia. Patient was thus, diagnosed as having abdominal myofascitis and treated accordingly. A review of literature showed that such a clinical presentation of this disease is quite rare and can lead to unnecessary laparotomy and delay in diagnosis leading to morbidity...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28045344/contrast-enhanced-ultrasound-mapping-of-sentinel-lymph-nodes-in-oral-tongue-cancer-a-pilot-study
#17
Gvetadze R Shalva, P Xiong, Mingming Lv, J Li, J Hu, Konstantin Ilkaev, Xin Yang, Jian Sun
OBJECTIVES: To assess the usefulness of contrast-enhanced ultrasound with peritumoral injection of microbubble contrast agent for detecting the sentinel lymph nodes for oral tongue carcinoma. METHODS: Preliminary study, case series. The study was carried out on 12 patients withT1-2cN0 oral tongue cancer. A radical resection of the primary disease was planned, a modified radical supraomohyoid neck dissection was reserved for patients owing larger lesions (T2, n=8)...
January 3, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28041745/contrast-enhanced-ultrasound-using-perfluorobutane-containing-microbubbles-in-the-assessment-of-liver-allograft-damage-an-exploratory-prospective-study
#18
Ijin Joo, Jae Young Lee, Dong Ho Lee, Ju Hyeon Jeon, Hyeyoung Kim, Nam-Joon Yi, Kwang-Woong Lee, Kyung-Suk Suh
This prospective study investigated the usefulness of contrast (perfluorobutane-containing microbubbles)-enhanced ultrasound in the non-invasive assessment of liver allograft damage. Forty-one liver recipients underwent contrast-enhanced ultrasound followed by a liver biopsy. The hepatic filling rate (time between the arrival of contrast agent in the right hepatic artery and the maximum intensity of hepatic parenchyma) and parenchymal intensity difference before and after instantaneous high-power emission in the Kupffer phase were measured...
December 29, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28041744/quantitative-analysis-of-contrast-enhanced-ultrasound-imaging-in-invasive-breast-cancer-a-novel-technique-to-obtain-histopathologic-information-of-microvessel-density
#19
Naoko Mori, Shunji Mugikura, Shoki Takahashi, Koichi Ito, Chiaki Takasawa, Li Li, Minoru Miyashita, Atsuko Kasajima, Yu Mori, Takanori Ishida, Tetsuya Kodama, Kei Takase
We examined whether enhancement area ratios obtained by the new bubble detection method correlate with histologic microvessel density in invasive breast cancer. Forty consecutive patients with invasive breast cancer lesions underwent contrast-enhanced ultrasound. The ratio of enhanced area to manually segmented tumor area (enhancement area ratio) was obtained with the new method at peak and delayed phases (50-54, 55-59, 60-64 and 65-69 s). We also analyzed time-intensity curves to obtain peak intensity and area under curve...
December 29, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28039821/selecting-the-best-aop-for-isoxazolyl-penicillins-degradation-as-a-function-of-water-characteristics-effects-of-ph-chemical-nature-of-additives-and-pollutant-concentration
#20
Paola Villegas-Guzman, Javier Silva-Agredo, Oscar Florez, Ana L Giraldo-Aguirre, Cesar Pulgarin, Ricardo A Torres-Palma
To provide new insights toward the selection of the most suitable AOP for isoxazolyl penicillins elimination, the degradation of dicloxacillin, a isoxazolyl penicillin model, was studied using different advanced oxidation processes (AOPs): ultrasound (US), photo-Fenton (UV/H2O2/Fe(2+)) and TiO2 photocatalysis (UV/TiO2). Although all processes achieved total removal of the antibiotic and antimicrobial activity, and increased the biodegradability level of the solutions, significant differences concerning the mineralization extend, the pH of the solution, the pollutant concentration and the chemical nature of additives were found...
December 28, 2016: Journal of Environmental Management
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