keyword
MENU ▼
Read by QxMD icon Read
search

Ultrasound contrast

keyword
https://www.readbyqxmd.com/read/28545055/comparative-lytic-efficacy-of-rt-pa-and-ultrasound-in-porcine-versus-human-clots
#1
Shenwen Huang, Himanshu Shekhar, Christy K Holland
INTRODUCTION: Porcine thrombi are employed routinely in preclinical models of ischemic stroke. In this study, we examined the differential lytic susceptibility of porcine and human whole blood clots with and without the use of microbubbles and ultrasound (US) as an adjuvant. MATERIALS AND METHODS: An in vitro system equipped with time-lapse microscopy was used to evaluate recombinant tissue-plasminogen activator (rt-PA) lysis of porcine and human clots in the same species or cross species plasma...
2017: PloS One
https://www.readbyqxmd.com/read/28544620/phenotyping-cardiac-and-structural-birth-defects-in-fetal-and-newborn-mice
#2
REVIEW
Xiaoqin Liu, Andrew J Kim, William Reynolds, Yijen Wu, Cecilia W Lo
Mouse models are invaluable for investigating the developmental etiology and molecular pathogenesis of structural birth defects. While this has been deployed for studying a wide spectrum of birth defects, mice are particularly valuable for modeling congenital heart disease, given they have the same four-chamber cardiac anatomy as in humans. We have developed the use of noninvasive fetal ultrasound together with micro-computed tomography (micro-CT) imaging for high throughput phenotyping of mice for congenital heart defects (CHD) and other developmental anomalies...
May 22, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28542533/ultrasonography-methods-for-predicting-malignancy-in-canine-mammary-tumors
#3
Marcus Antonio Rossi Feliciano, Ricardo Andrés Ramirez Uscategui, Marjury Cristina Maronezi, Ana Paula Rodrigues Simões, Priscila Silva, Beatriz Gasser, Leticia Pavan, Cibele Figueira Carvalho, Júlio Carlos Canola, Wilter Ricardo Russiano Vicente
The aim of this study was to evaluate and compare the efficacy of B-mode, Doppler, contrast-enhanced ultrasonography (CEUS), and Acoustic Radiation Force Impulse (ARFI) elastography in predicting malignancy in canine mammary masses. This was a prospective cohort study from 2014 to 2016, which included 153 bitches with one or more mammary masses. A total of 300 masses were evaluated by ultrasonography (B-mode, Doppler, CEUS, and ARFI) and subsequently classified as benign or malignant by histopathology. Each ultrasound parameters studied were compared between benign and malignant masses by Chi-square or Student tests and differences were considered significant when P < 0...
2017: PloS One
https://www.readbyqxmd.com/read/28541198/combined-pulse-echo-ultrasound-and-multispectral-optoacoustic-tomography-with-a-multi-segment-detector-array
#4
Elena Mercep, X Luis Dean Ben, Daniel Razansky
The high complementarity of ultrasonography and optoacoustic tomography has prompted the development of combined approaches that utilize the same transducer array for detecting both optoacoustic and pulse-echo ultrasound responses from tissues. Yet, due to the fundamentally different physical contrast and image formation mechanisms, the development of detection technology optimally suited for image acquisition in both modalities remains a major challenge. Herein, we introduce a multi-segment detector array approach incorporating array segments of linear and concave geometry to optimally support both ultrasound and optoacoustic image acquisition...
May 18, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28541020/application-of-contrast-enhanced-ultrasound-before-inferior-vena-cava-filter-recovery
#5
Ji-Ping Yan, Wei-Qin Li, Zhen-Feng Wang, Bian-Lian Guo
OBJECTIVE: This study aims to investigate the clinical value of contrast-enhanced ultrasound (CEU) before temporary inferior vena cava filter (IVCF) recovery in patients with deep venous thrombosis, in order to provide ultrasound signs for the recovery of IVCF in clinical practice. METHODS: The CEU manifestations of patients with deep vein thrombosis before temporary IVCF recovery were retrospectively analyzed. With the manifestations of digital subtraction angiography (DSA) or results of the surgical recovery of IVCF as the standard, the detection rate of a thrombus in IVCF was compared between conventional ultrasound and CEU; and the role of CEU in detecting complications of IVCF was analyzed...
May 24, 2017: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/28540825/the-role-of-t1-perfusion-based-classification-in-predicting-the-outcome-of-magnetic-resonance-guided-high-intensity-focused-ultrasound-treatment-of-adenomyosis
#6
Bilgin Keserci, Nguyen Minh Duc
OBJECTIVE: To assess the relationship between magnetic resonance (MR) T1 perfusion-based classification and the outcome of MR-guided high intensity focused ultrasound treatment of adenomyosis, defined as nonperfused volume (NPV) ratio. METHODS: The adenomyosis of 31 women was classified into group A (time-signal intensity [SI] curve of adenomyosis lower than that of the myometrium) and group B (time-SI curve of adenomyosis equal to or higher than that of the myometrium) on the basis of time-SI curves on dynamic contrast enhanced (DCE) MR images acquired at screening...
May 19, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28540807/technical-aspects-of-osteoid-osteoma-ablation-in-children-using-mr-guided-high-intensity-focussed-ultrasound
#7
Pavel S Yarmolenko, Avinash Eranki, Ari Partanen, Haydar Celik, AeRang Kim, Matthew Oetgen, Viktoriya Beskin, Domiciano Santos, Janish Patel, Peter C W Kim, Karun Sharma
BACKGROUND: Osteoid osteoma (OO) is a painful bone tumour occurring in children and young adults. Magnetic resonance imaging-guided high intensity focussed ultrasound (MR-HIFU) allows non-invasive treatment without ionising radiation exposure, in contrast to the current standard of care treatment with radiofrequency ablation (RFA). This report describes technical aspects of MR-HIFU ablation in the first 8 paediatric OO patients treated in a safety and feasibility clinical trial (total enrolment of up to 12 patients)...
April 24, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28538447/editor-s-introduction-the-brave-new-world-of-ultrasound-contrast
#8
Theodore J Dubinsky
No abstract text is available yet for this article.
June 2017: Ultrasound Quarterly
https://www.readbyqxmd.com/read/28536703/a-novel-segmentation-approach-combining-region-and-edge-based-information-for-ultrasound-images
#9
Yaozhong Luo, Longzhong Liu, Qinghua Huang, Xuelong Li
Ultrasound imaging has become one of the most popular medical imaging modalities with numerous diagnostic applications. However, ultrasound (US) image segmentation, which is the essential process for further analysis, is a challenging task due to the poor image quality. In this paper, we propose a new segmentation scheme to combine both region- and edge-based information into the robust graph-based (RGB) segmentation method. The only interaction required is to select two diagonal points to determine a region of interest (ROI) on the original image...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28535732/duplex-ultrasound-surveillance-after-uncomplicated-endovascular-abdominal-aortic-aneurysm-repair
#10
Jacob S Schaeffer, Irina Shakhnovich, Kyle N Sieck, Kara J Kallies, Clark A Davis, Thomas H Cogbill
OBJECTIVES: Health-care costs and risks of radiation and intravenous contrast exposure challenge computed tomography angiography (CTA) as the standard surveillance method after endovascular abdominal aortic aneurysm repair (EVAR). We reviewed our experience using Duplex ultrasound scan (DUS) as an initial and subsequent surveillance technique after uncomplicated EVAR. METHODS: The medical records of patients who underwent EVAR from 2004 to 2014 with at least 1 postoperative imaging study were retrospectively reviewed...
January 1, 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28535604/use-of-transcatheter-contrast-enhanced-ultrasound-with-vessel-navigation-to-reduce-the-contrast-requirement-during-transarterial-chemoembolization-in-patients-with-renal-impairment
#11
https://www.readbyqxmd.com/read/28534769/a-systematic-investigation-of-lateral-estimation-using-various-interpolation-approaches-in-conventional-ultrasound-imaging
#12
Zhi Liu, Chengwu Huang, Jianwen Luo
Accurate lateral displacement and strain estimat- ion is critical for some applications of elasticity imaging. Typically, motion estimation in the lateral direction is challenging because of low sampling frequency and lack of phase information in conventional ultrasound imaging. Several approaches have been proposed to improve the performance of lateral estimation, such as lateral interpolation on the RF signals (Interp_RF), lateral interpolation on the cross-correlation function (Interp_CCF) and lateral interpolation on both the RF signals and cross-correlation function (Interp_Both)...
May 17, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28533803/use-of-ultrasound-in-image-guided-high-dose-rate-brachytherapy-enumerations-and-arguments
#13
REVIEW
Susovan Banerjee, Tejinder Kataria, Deepak Gupta, Shikha Goyal, Shyam Singh Bisht, Trinanjan Basu, Ashu Abhishek
Inherently, brachytherapy is the most conformal radiotherapeutic technique. As an aid to brachytherapy, ultrasonography (USG) serves as a portable, inexpensive, and simple to use method allowing for accurate, reproducible, and adaptive treatments. Some newer brachytherapy planning systems have incorporated USG as the sole imaging modality. Ultrasonography has been successfully used to place applicator and dose planning for prostate, cervix, and anal canal cancers. It can guide placement of brachytherapy catheters for all other sites like breast, skin, and head and neck cancers...
April 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28532082/ultrasonic-nanotherapy-of-breast-cancer-using-novel-ultrasound-responsive-alginate-shelled-perfluorohexane-nanodroplets-in-vitro-and-in-vivo-evaluation
#14
Fatemeh Baghbani, Mahdieh Chegeni, Fathollah Moztarzadeh, Jamshid Aghazadeh Mohandesi, Manijhe Mokhtari-Dizaji
Development of a new class of multifunctional ultrasound-responsive smart nanocarriers that combine therapeutic properties with diagnostic imaging has gained great attention in recent years. Here, we describe the results of ultrasonic nanotherapy of breast cancer using novel alginate-stabilized perfluorohexane nanodroplets. Doxorubicin (Dox)-loaded multifunctional nanodroplets (Dox-NDs) were synthesized via nanoemulsion process and evaluated in vitro and in vivo with focus on cytotoxicity, hemolytic activity, biodistribution, biosafety, and antitumor activity...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28529584/anti-microrna-21-221-and-microrna-199a-transfected-by-ultrasound-microbubbles-induces-the-apoptosis-of-human-hepatoma-hepg2-cells
#15
Xinmin Guo, Shunhua Guo, Liwen Pan, Li Ruan, Yingshi Gu, Jichuang Lai
Gene therapy, particularly microRNA (miRNA), is a promising candidate in the treatment of cancer; however, it is challenging to develop gene delivery systems. Ultrasound microbubbles have been used for gene delivery with excellent results. The present study aimed to investigate the transfection efficiency of HepG2 cells using ultrasound microbubbles. The effects of three miRNAs (miR-21, miR-221 and miR-199a) on HepG2 cells were also determined by performing ultrasound microbubble-mediated gene transfection...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28528147/variability-and-reproducibility-of-segmental%C3%A2-longitudinal-strain-measurement-a-report-from-the-eacvi-ase-strain-standardization-task%C3%A2-force
#16
Oana Mirea, Efstathios D Pagourelias, Jurgen Duchenne, Jan Bogaert, James D Thomas, Luigi P Badano, Jens-Uwe Voigt
OBJECTIVES: In this study, we compared left ventricular (LV) segmental strain measurements obtained with different ultrasound machines and post-processing software packages. BACKGROUND: Global longitudinal strain (GLS) has proven to be a reproducible and valuable tool in clinical practice. Data about the reproducibility and intervendor differences of segmental strain measurements, however, are missing. METHODS: We included 63 volunteers with cardiac magnetic resonance-proven infarct scar with segmental LV function ranging from normal to severely impaired...
May 12, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28528019/us-elastography-using-carotid-artery-pulsation-may-increase-the-diagnostic-accuracy-for-thyroid-nodules-with-us-pathology-discordance
#17
Yoon Joo Cho, Eun Ju Ha, Miran Han, Jin Wook Choi
This study evaluated the diagnostic performance of ultrasound elastography (USE) using carotid arterial pulsation and determined the reproducibility of USE for thyroid nodules. A total of 148 patients with 173 thyroid nodules participated. The mean elasticity contrast index (ECI) was significantly higher in malignant nodules (3.1 ± 1.5) than in benign nodules (1.7 ± 0.8) (p < 0.001). When a cut-off ECI value of 3.5 was used, the diagnostic accuracy (78.6%) of gray-scale ultrasound (US) + ECI was the highest compared with that of the gray-scale US (76...
May 17, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28527270/-effect-of-antenatal-spiramycin-treatment-on-the-frequency-of-retinochoroiditis-due-to-congenital-toxoplasmosis-in-a-colombian-cohort
#18
Liliana María Zuluaga, John Camilo Hernández, Carlos Felipe Castaño, Jorge Hernando Donado
INTRODUCTION: Gestational toxoplasmosis is frequent and severe. There is still debate about the benefits of treatment against ocular manifestations in the newborn. Spiramycin treatment is used for this purpose, unfortunately prenatal diagnosis is sometimes delayed and pregnant women are not treated. OBJECTIVE: To describe the relationship between treatment with spiramycin during pregnancy in mothers with gestational toxoplasmosis and development of ocular toxoplasmosis in newborns...
April 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527202/diagnostic-accuracy-of-contrast-enhanced-ultrasound-ceus-in-monitoring-vascular-complications-in-patients-after-liver-transplantation-diagnostic-performance-compared-with-histopathological-results
#19
J Rübenthaler, K J Paprottka, E Hameister, K Hoffmann, N Joiko, M Reiser, D Rjosk-Dendorfer, D A Clevert
PURPOSE: To analyse the diagnostic performance of contrast-enhanced ultrasound (CEUS) in patients with vascular complications and transplant rejection compared to histopathological results. MATERIALS AND METHODS: Our study consisted of 45 retrospectively analysed patients that underwent liver transplantations between January 1993 and December 2015 and developed post-transplant vascular complications with transplant rejection. CEUS examinations took place between September 2006 and December 2015...
May 19, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28527201/contrast-enhanced-ultrasound-ceus-prediction-of-focal-liver-lesions-in-patients-after-liver-transplantation-in-comparison-to-histopathology-results
#20
J Rübenthaler, K J Paprottka, E Hameister, K Hoffmann, N Joiko, M Reiser, R Rjosk-Dendorfer, D A Clevert
PURPOSE: To investigate the value of contrast-enhanced ultrasound (CEUS) in histologic prediction of focal liver lesions after liver transplantation. MATERIALS AND METHODS: 10 focal liver lesions in 10 patients after liver transplantation were scanned using CEUS and the CEUS results were compared with the histopathological results. RESULTS: Among 10 focal liver lesions, 7 proofed to be histopathological benign and 3 lesions proofed to be histopathological malignant...
May 19, 2017: Clinical Hemorheology and Microcirculation
keyword
keyword
80088
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"