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Ultrasound in Medicine & Biology

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https://www.readbyqxmd.com/read/29133200/histologic-and-hemodynamic-correlates-of-right-ventricular-function-in-a-pressure-overload-model-a-study-using-three-dimensional-speckle-tracking-echocardiography
#1
Yuman Li, Lei Li, Junwei Liu, Mengmei Li, Qing Lv, Jing Wang, Lin He, Mingxing Xie
The aim of our study was to assess the characterization of right ventricular (RV) deformation using three-dimensional (3D) speckle tracking echocardiography (STE) and association of 3D-STE indices with histologic and hemodynamic parameters in a chronic RV pressure overload animal model. Pulmonary artery banding (PAB) was used to induce RV pressure overload in seven beagles. 3D-STE, histologic and hemodynamic measurements were performed in PAB and sham-operated beagles 3 mo after PAB. RV longitudinal, radial and circumferential strain was measured from 3D-STE...
November 10, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29126754/effect-of-pulsed-therapeutic-ultrasound-and-diosmin-on-skeletal-muscle-oxidative-parameters
#2
Luis Fernando Sousa Filho, Paula P Menezes, Dayanne Valéria Soares Santana, Bruno S Lima, Shanmugan Saravanan, Grace Kelly M Almeida, José Evaldo R Menezes Filho, Marta M B Santos, Adriano Antunes A S Araújo, Evaleide Diniz de Oliveira
Cyclodextrins (CDs) have been widely used as a promising alternative in the formation of inclusion complexes with poorly soluble molecules. From this perspective, the present study aimed to study the inclusion complexes of diosmin in β-cyclodextrin, chemically quantify the diosmin-in-gel preparation and analyze the stability of the gels. Furthermore, we evaluated the effect of therapeutic pulsed ultrasound (TPU) in association with the gel-diosmin complex on the parameters of muscle damage and oxidative stress in rats...
November 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29126753/usefulness-of-contrast-enhanced-ultrasound-in-differentiating-inflammatory-bowel-disease-from-colon-cancer
#3
Fan Zhang, Li-Ying Miao, Hui-Yu Ge, Shi Tan, Zhi-Qiang Li, Bo Zhao
To evaluate the diagnostic performance of contrast-enhanced ultrasound (CEUS) in differential diagnosis of inflammatory bowel disease (IBD) and colon cancer, we enrolled 51 patients with thickened bowel walls (13 with IBD and 38 with colon cancer). Ultrasound and CEUS were performed and both qualitative and quantitative features were analyzed. The intestinal wall stratification was preserved in 63.6% of the IBD group but in only 2.6% of the colon cancer group (p <0.01). On CEUS, disordered enhancement and heterogeneous enhancement were shown in only 9...
November 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29126752/statement-and-recommendations-on-interventional-ultrasound-as-a-thyroid-diagnostic-and-treatment-procedure
#4
REVIEW
Christoph F Dietrich, Thomas Müller, Jörg Bojunga, Yi Dong, Giovanni Mauri, Maija Radzina, Manjiri Dighe, Xin-Wu Cui, Frank Grünwald, Andreas Schuler, Andre Ignee, Huedayi Korkusuz
The recently published guidelines of the European Federation of Societies for Ultrasound in Medicine and Biology (EFSUMB) on interventional ultrasound (INVUS)-guided procedures summarize the intended interdisciplinary and multiprofessional approach. Herewith, we report on recommendations for interventional procedures for diagnosis and treatment of the thyroid gland.
November 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29122317/sonographic-and-anatomic-description-of-the-subtalar-joint
#5
Peter Mandl, David Bong, Peter V Balint, Hilde Berner Hammer, Maribel Miguel, Esperanza Naredo, Lene Terslev, Ingrid Möller
Our study provides a detailed anatomic and sonographic description of the subtalar joint, a single joint that, anatomically, is divided into the anterior subtalar joint (ASTJ) and the posterior subtalar joint (PSTJ). Cadaver specimens of the ankle and foot were examined in detail by ultrasound (US), and the subtalar joints of all the specimens were injected with colored latex of a contrasting color under US guidance. Compatible with other studies, examination of the sections revealed lack of communication between the ASTJ and the PSTJ and communication between the PSTJ and the posterior recess of the tibiotalar joint...
November 6, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29122316/diagnostic-accuracy-of-2-d-shear-wave-elastography-for-the-non-invasive-staging-of-liver-fibrosis-in-patients-with-elevated-alanine-aminotransferase-levels
#6
Jie Zeng, Zeping Huang, Jieyang Jin, Jian Zheng, Tao Wu, Rongqin Zheng
This study assessed the diagnostic accuracy of 2-D shear wave elastography (2-D-SWE) for the non-invasive staging of liver fibrosis and compared the findings with those for biochemical markers (the aspartate aminotransferase-to-platelet index and fibrosis-4 index) of liver fibrosis in patients with elevated alanine aminotransferase (ALT) levels (>5 × the upper limit of normal). Patients with chronic liver diseases and elevated ALT levels who underwent liver biopsy were consecutively included. Receiver operating characteristic (ROC) curves were constructed to assess overall accuracy and to identify optimal cutoff values...
November 6, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29122315/can-in-vivo-medial-gastrocnemius-muscle-tendon-unit-lengths-be-reliably-estimated-by-two-ultrasonography-methods-a-within-session-analysis
#7
Francesco Cenni, Simon-Henri Schless, Lynn Bar-On, Guy Molenaers, Anja Van Campenhout, Erwin Aertbeliën, Herman Bruyninckx, Britta Hanssen, Kaat Desloovere
A clinically feasible method to reliably estimate muscle-tendon unit (MTU) lengths could provide essential diagnostic and treatment planning information. A 3-D freehand ultrasound (3-DfUS) method was previously validated for extracting in vivo medial gastrocnemius (MG) lengths, although the processing time can be considered substantial for the clinical environment. This investigation analyzed a quicker and simpler method using the US transducer as a spatial pointer (US-PaP), where the within-session reliability of extracting the muscle-tendon unit (MTU) and tendon lengths are estimated...
November 6, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29100792/assessing-the-reliability-of-ultrasound-imaging-to-examine-peripheral-nerve-excursion-a-systematic-literature-review
#8
REVIEW
Ben Kasehagen, Richard Ellis, Rodney Pope, Nicholas Russell, Wayne Hing
Ultrasound imaging (USI) is gaining popularity as a tool for assessing nerve excursion and is becoming an important tool for the assessment and management of entrapment neuropathies. This systematic review aimed to identify current methods and report on the reliability of using USI to examine nerve excursion and identify the level of evidence supporting the reliability of this technique. A systematic search of five electronic databases identified studies assessing the reliability of using USI to examine nerve excursion...
October 31, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29100791/monitoring-progression-of-amyotrophic-lateral-sclerosis-using-ultrasound-morpho-textural-muscle-biomarkers-a-pilot-study
#9
Jacinto J Martínez-Payá, José Ríos-Díaz, Francesc Medina-Mirapeix, Juan F Vázquez-Costa, María Elena Del Baño-Aledo
The need is increasing for progression biomarkers that allow the loss of motor neurons in amyotrophic lateral sclerosis (ALS) to be monitored in clinical trials. In this prospective longitudinal study, muscle thickness, echointensity, echovariation and gray level co-occurrence matrix textural features are examined as possible progression ultrasound biomarkers in ALS patients during a 5-mo follow-up period. We subjected 13 patients to 3 measurements for 20 wk. They showed a significant loss of muscle, an evident tendency to loss of thickness and increased echointensity and echovariation...
October 31, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29096999/interstitial-matrix-prevents-therapeutic-ultrasound-from-causing-inertial-cavitation-in-tumescent-subcutaneous-tissue
#10
John P Koulakis, Joshua Rouch, Nhan Huynh, Genia Dubrovsky, James C Y Dunn, Seth Putterman
We search for cavitation in tumescent subcutaneous tissue of a live pig under application of pulsed, 1-MHz ultrasound at 8 W cm(-2) spatial peak and pulse-averaged intensity. We find no evidence of broadband acoustic emission indicative of inertial cavitation. These acoustic parameters are representative of those used in external-ultrasound-assisted lipoplasty and in physical therapy and our null result brings into question the role of cavitation in those applications. A comparison of broadband acoustic emission from a suspension of ultrasound contrast agent in bulk water with a suspension injected subcutaneously indicates that the interstitial matrix suppresses cavitation and provides an additional mechanism behind the apparent lack of in-vivo cavitation to supplement the absence of nuclei explanation offered in the literature...
October 31, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29111161/effect-of-low-intensity-pulsed-ultrasound-on-joint-injury-and-post-traumatic-osteoarthritis-an-animal-study
#11
Talal Zahoor, Reed Mitchell, Priya Bhasin, Yi Guo, Sharada Paudel, Lew Schon, Zijun Zhang
This study investigated the therapeutic potential of low-intensity pulsed ultrasound (LIPUS) in post-traumatic osteoarthritis (PTOA). Intra-articular fracture of the medial tibial plateau was surgically created in 30 rats. LIPUS was applied to the operated joints either for the first 2 wk (LIPUS1-2 group) or in weeks 4 and 5 after intra-articular fracture (LIPUS4-5 group). In controls, the operated knees were not treated with LIPUS (LIPUS0 group). The rats were monitored with weekly gait analysis and euthanized at week 8...
October 27, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29107354/effects-of-extracorporeal-shock-wave-mediated-transdermal-local-anesthetic-drug-delivery-on-rat-caudal-nerves
#12
Jer-Junn Luh, Wan-Ting Huang, Kwan-Hwa Lin, Yi-You Huang, Po-Ling Kuo, Wen-Shiang Chen
Cavitation plays a substantial role in the clinical effects of extracorporeal shock wave therapy (ESWT). It is also generally accepted as a major mechanism in sonophoresis. To identify the enhancing effect of extracorporeal shock wave-mediated transdermal drug delivery, 24 Wistar rats were randomly assigned to four groups: (i) topical application of a eutectic mixture of local anesthetics (EMLA); (ii) 1-MHz ultrasound; (iii) ESWT pre-treatment combined with EMLA application; (iv) ESWT concurrent with EMLA application on rat tails...
October 27, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29107355/spatial-compounding-of-3-d-fetal-brain-ultrasound-using-probabilistic-maps
#13
Jorge Perez-Gonzalez, Fernando Arámbula-Cosío, Mario Guzmán, Lisbeth Camargo, Benjamin Gutierrez, Diana Mateus, Nassir Navab, Verónica Medina-Bañuelos
A new method to address the problem of shadowing in fetal brain ultrasound volumes is presented. The proposed approach is based on the spatial composition of multiple 3-D fetal head projections using the weighted Euclidean norm as an operator. A support vector machine, which is trained with optimal textural features, was used to assign weighting according to the posterior probabilities of brain tissue and shadows. Both phantom and real fetal head ultrasound volumes were compounded using previously reported operators and compared with the proposed composition method to validate it...
October 26, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29107353/ultrasound-imaging-technologies-for-breast-cancer-detection-and-management-a-review
#14
REVIEW
Rongrong Guo, Guolan Lu, Binjie Qin, Baowei Fei
Ultrasound imaging is a commonly used modality for breast cancer detection and diagnosis. In this review, we summarize ultrasound imaging technologies and their clinical applications for the management of breast cancer patients. The technologies include ultrasound elastography, contrast-enhanced ultrasound, 3-D ultrasound, automatic breast ultrasound and computer-aided detection of breast ultrasound. We summarize the study results seen in the literature and discuss their future directions. We also provide a review of ultrasound-guided, breast biopsy and the fusion of ultrasound with other imaging modalities, especially magnetic resonance imaging (MRI)...
October 26, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29079396/celiac-artery-compression-syndrome-evaluated-with-3-d-contrast-enhanced-ultrasonography-a-new-approach
#15
Xian-Ming Wang, Xian-Ping Hua, Guo-Liang Zheng
This study was performed to estimate the value of 3-D contrast-enhanced ultrasonography (3-D-CEUS) in the diagnosis of celiac artery compression syndrome (CACS). Patients suspected of having CACS were assessed with 3-D-CEUS and contrasted with computed tomography angiography. Diagnostic accuracy was evaluated with a receiver operating characteristic curve. Three-dimensional CEUS revealed 19 positive and 9 negative cases. In the negative group, the contrast agent did not change with respiration. In the positive group, the contrast agent exhibited a hook-shaped stenosis on expiration and returned to normal on inspiration...
October 24, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29079395/effect-of-low-intensity-pulsed-ultrasound-on-the-expression-of-calcium-ion-transport-related-proteins-during-tertiary-dentin-formation
#16
Jing Zuo, Jiaxiu Zhen, Fei Wang, Yueheng Li, Zhi Zhou
Low-intensity pulsed ultrasound (LIPUS) is known for its positive effect on bone healing and reparative regeneration. This study investigated whether LIPUS affects reparative progression of the tooth and the expression of calcium ion transport-related proteins in odontoblasts and dental pulp cells using a rat dentin-pulp complex injury model. Forty male adult Sprague-Dawley rats underwent cavity preparation in the right maxillary first molar: 20 received LIPUS irradiation on the cavity-prepared tooth; 20 received LIPUS irradiation on the left maxillary first molar...
October 24, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29074273/real-time-spatiotemporal-control-of-high-intensity-focused-ultrasound-thermal-ablation-using-echo-decorrelation-imaging-in-ex-vivo-bovine-liver
#17
Mohamed A Abbass, Jakob K Killin, Neeraja Mahalingam, Fong Ming Hooi, Peter G Barthe, T Douglas Mast
The ability to control high-intensity focused ultrasound (HIFU) thermal ablation using echo decorrelation imaging feedback was evaluated in ex vivo bovine liver. Sonications were automatically ceased when the minimum cumulative echo decorrelation within the region of interest exceeded an ablation control threshold, determined from preliminary experiments as -2.7 (log-scaled decorrelation per millisecond), corresponding to 90% specificity for local ablation prediction. Controlled HIFU thermal ablation experiments were compared with uncontrolled experiments employing two, five or nine sonication cycles...
October 23, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29066019/assessment-of-coded-excitation-implementation-for-estimating-heat-induced-speed-of-sound-changes
#18
Oren Gargir, Haim Azhari, Michael Zibulevsky
Speed of sound (SoS) is an acoustic property that is highly sensitive to changes in tissues. SoS can be mapped non-invasively using ultrasonic through transmission wave tomography. This however, practically limits its clinical use to the breast. A pulse-echo-based method that has broader clinical use and that can reliably measure treatment-induced changes in SoS even under poor signal-to-noise ratio (SNR) is highly desirable. The aim of this study was to evaluate the implementation of coded excitations (CoEs) to improve pulse-echo monitoring of heat-induced changes in the SoS...
October 20, 2017: Ultrasound in Medicine & Biology
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
#19
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
#20
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
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