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Ultrasound in Medicine & Biology

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https://www.readbyqxmd.com/read/28073593/integrative-cardiopulmonary-ultrasound-for-interstitial-lung-disease-assessment-correlation-between-lung-ultrasound-performance-and-cardiac-involvement
#1
Wei-Wei Zhu, Yi-Dan Li, Hong Li, Xiu-Zhang Lu, Ling-Yun Kong, Xiao-Guang Ye, Qi-Zhe Cai, Lan-Lan Sun, Wei Jiang, Li Wang
The aims of this study were to apply integrative cardiopulmonary ultrasound (thoracic ultrasound) to the evaluation of patients with interstitial lung disease (ILD) and to determine the relationship between lung ultrasound signs and echocardiographic parameters such as systolic pulmonary artery pressure (SPAP) and various right ventricular parameters. ILD patients and healthy controls underwent lung ultrasound (LUS) and echocardiographic tests. In addition to traditional echocardiographic parameters, right ventricular free wall longitudinal strain (RVLS_FW) was measured using 2-D speckle-tracking echocardiography...
January 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28065541/nodular-fasciitis-sonographic-pathologic-correlation
#2
Ho-Hsian Yen, Hong-Jen Chiou, Yi-Hong Chou, Chih-Hsueh Chen, Wan-Yuo Guo
We evaluated nodular fasciitis (NF) in 19 patients, focusing on the correlation between its sonographic and histopathologic features. Sonograms were retrospectively reviewed, and the location, shape, margin, echogenicity, echogenic rim, peripheral hyper-echoic nodules, posterior enhancement and vascularity of the lesions were recorded. In the histopathologic analysis, three patterns-infiltrating, pushing border and well circumscribed-were identified, and culture-like tissue centers were classified according to the distribution of focal keloid-like collagen bundles: uneven or even...
January 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28065540/cardiac-shear-wave-velocity-detection-in-the-porcine-heart
#3
Hendrik J Vos, Bas M van Dalen, Ilkka Heinonen, Johan G Bosch, Oana Sorop, Dirk J Duncker, Antonius F W van der Steen, Nico de Jong
Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate echocardiography. The waves were captured with 4000 frames/s using a programmable commercial ultrasound machine. The wave pattern was extracted from the data through a local tissue velocity estimator based on one-lag autocorrelation...
January 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28065539/atlas-based-mosaicing-of-left-atrial-3-d-transesophageal-echocardiography-images
#4
Harriët W Mulder, Marijn van Stralen, Ben Ren, Alexander Haak, Max A Viergever, Johan G Bosch, Josien P W Pluim
Transesophageal echocardiography (TEE) is a promising imaging modality used to guide cardiac interventions, such as catheter ablation for the treatment of cardiac arrhythmias. These procedures rely on good visualization of the left atrium and pulmonary veins. To visualize these structures in a single volume, the acquisition, registration and fusion of multiple TEE views of the left atrium are required. We introduce atlas-based mosaicing as a method for the registration of images that are acquired according to a standardized protocol...
January 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28063610/ultrasound-measurements-of-skeletal-muscle-architecture-are-associated-with-strength-and-functional-capacity-in-older-adults
#5
Isaac Selva Raj, Stephen R Bird, Anthony J Shield
The goal of this study was to determine whether ultrasound measures of muscle architecture can be used to infer strength and functional capacity in older adults. Thirty-six healthy older adults (aged 68.2 ± 5.3 y) undertook isokinetic dynamometry for isometric and isokinetic concentric knee extensor strength, the 6-m fast walk, timed up and go, stair climb and descent and vertical jump tests. Longitudinal brightness-mode ultrasound scans (probe frequency, 10 MHz) of the vastus lateralis, vastus intermedius, rectus femoris and gastrocnemius medialis were obtained, and muscle architecture measures (thickness, fascicle pennation angle and fascicle length) were correlated with the aforementioned strength and functional measures...
January 4, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28062179/effects-of-non-focused-microbubble-enhanced-and-high-intensity-focused-ultrasound-on-hemostasis-in-a-rabbit-model-of-liver-trauma
#6
Da-Wei Zhao, Meng Tian, Jian-Zhong Zou, Yuan-Yi Zheng, Tao Li
Uncontrolled hemorrhage after trauma to the liver can lead to death. The present study compared the effects of non-focused microbubble-enhanced ultrasound and high-intensity focused ultrasound on hepatic hemostasis in the injured liver. Blood perfusion level, serum liver enzyme levels and the aspartate transaminase/alanine transaminase ratio differed between the two types of treatment (all p values < 0.05). Hepatic cells in the microbubble-enhanced ultrasound group exhibited edema and compressed the hepatic sinus and blood vessels in the portal area...
January 3, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28062178/testicular-shear-wave-elastography-in-normal-and-infertile-men-a-prospective-study-on-601-patients
#7
Laurence Rocher, Aline Criton, Jean-Luc Gennisson, Vincent Izard, Sophie Ferlicot, Mickael Tanter, Gerard Benoit, Marie France Bellin, Jean-Michel Correas
Our aim in the study described here was to prospectively establish the feasibility of using and reproducibility of testicular shear-wave elastography in the assessment of testicular stiffness in 62 normal patients and 539 infertile men with obstructive azoospermia (OA), non-Klinefelter syndrome non-obstructive azoospermia (non-KS NOA), Klinefelter syndrome NOA (KS NOA), oligoasthenoteratozoospermia (OAT) or a left varicocele. The feasibility rate was 96.9%, with an intra-class correlation coefficient of 0.85 (95% confidence interval: 0...
January 3, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28057387/principal-strain-vascular-elastography-simulation-and-preliminary-clinical-evaluation
#8
Rohit Nayak, Steven Huntzicker, Jacques Ohayon, Nancy Carson, Vikram Dogra, Giovanni Schifitto, Marvin M Doyley
It is difficult to produce reliable polar strain elastograms (radial and circumferential) because the center of the carotid artery is typically unknown. Principal strain imaging can overcome this limitation, but suboptimal lateral displacement estimates make this an impractical approach for visualizing mechanical properties within the carotid artery. We hypothesized that compounded plane wave imaging can minimize this problem. To test this hypothesis, we performed (i) simulations with vessels of varying morphology and mechanical behavior (i...
January 2, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28043724/high-resolution-elastography-for-thin-layer-mechanical-characterization-toward-skin-investigation
#9
Caroline Chartier, Yassine Mofid, Cécile Bastard, Véronique Miette, Annabel Maruani, Laurent Machet, Frédéric Ossant
Interest in elasticity estimation for thin layers is increasing because of the various potential applications, including dermatology and cosmetology. In this context, we propose a dedicated elastographic system using 1-D high-frequency transient elastography (HF-TE) to estimate the 1-D Young's modulus through the dermis and hypodermis, which are the two human skin layers of interest in this study. An experimental validation of the HF-TE method was first carried out on two homogeneous tissue-mimicking hard and soft phantoms...
December 30, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28041745/contrast-enhanced-ultrasound-using-perfluorobutane-containing-microbubbles-in-the-assessment-of-liver-allograft-damage-an-exploratory-prospective-study
#10
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
#11
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/28040242/acoustic-impedance-analysis-with-high-frequency-ultrasound-for-identification-of-fatty-acid-species-in-the-liver
#12
Kazuyo Ito, Kenji Yoshida, Hitoshi Maruyama, Jonathan Mamou, Tadashi Yamaguchi
Acoustic properties of free fatty acids present in the liver were studied as a possible basis for non-invasive ultrasonic diagnosis of non-alcoholic steatohepatitis. Acoustic impedance was measured for the following types of tissue samples: Four pathologic types of mouse liver, five kinds of FFAs in solvent and five kinds of FFAs in cultured Huh-7 cells. A transducer with an 80-MHz center frequency was incorporated into a scanning acoustic microscopy system. Acoustic impedance was calculated from the amplitude of the signal reflected from the specimen surface...
December 28, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28038789/totally-implantable-wireless-ultrasonic-doppler-blood-flowmeters-toward-accurate-miniaturized-chronic-monitors
#13
REVIEW
Michael A Rothfuss, Jignesh V Unadkat, Michael L Gimbel, Marlin H Mickle, Ervin Sejdić
Totally implantable wireless ultrasonic blood flowmeters provide direct-access chronic vessel monitoring in hard-to-reach places without using wired bedside monitors or imaging equipment. Although wireless implantable Doppler devices are accurate for most applications, device size and implant lifetime remain vastly underdeveloped. We review past and current approaches to miniaturization and implant lifetime extension for wireless implantable Doppler devices and propose approaches to reduce device size and maximize implant lifetime for the next generation of devices...
December 27, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28034541/comparison-of-two-inexpensive-rapid-prototyping-methods-for-manufacturing-filament-target-ultrasound-phantoms
#14
Krisztián Füzesi, Miklós Gyöngy
Current use of 3-D printers to manufacture ultrasound phantoms is limited to relatively expensive photopolymer jetting printers. The present work investigates the feasibility of using two common and inexpensive 3-D printer technologies, fused deposition modeling (FDM) and digital light processing (DLP), to print custom filament target phantoms. Acoustic characteristics obtained from printed solid blocks indicated that the printing materials-acrylonitrile butadiene styrene and polylactic acid for FDM and a photopolymer for DLP printing-were appropriate for use as scatterers...
December 26, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28024660/a-novel-approach-to-detecting-postpartum-hemorrhage-using-contrast-enhanced-ultrasound
#15
Kenji Imai, Tomomi Kotani, Hiroyuki Tsuda, Tomoko Nakano, Akihiro Hirakawa, Fumitaka Kikkawa
The aim of this study was to estimate the efficacy of contrast-enhanced ultrasound (CEUS) in detecting postpartum hemorrhage (PPH) after cesarean section. This is the first study of CEUS in obstetric hemorrhage. A total of 37 patients, operated at Nagoya University Hospital, underwent CEUS. We evaluated the findings of CEUS, which were qualitatively defined as positive when pooling or leakage of contrast agent was observed in the uterine cavity, by measuring the amount of bleeding during the first 4 h after cesarean section...
December 23, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28024659/diagnosis-of-complex-pulley-ruptures-using-ultrasound-in%C3%A2-cadaver-models
#16
Isabelle Schöffl, Arnica Hugel, Volker Schöffl, Wolfgang Rascher, Jörg Jüngert
Pulley ruptures are common in climbing athletes. The purposes of this study were to determine the specific positioning of each pulley with regards to the joint, and to evaluate the ultrasound diagnostics of various pulley rupture combinations. For this, 34 cadaver fingers were analyzed via ultrasound, the results of which were compared to anatomic measurements. Different pulley ruptures were then simulated and evaluated using ultrasound in standardized dynamic forced flexion. Visualization of the A2 and A4 pulleys was achieved 100% of the time, while the A3 pulley was visible in 74% of cases...
December 23, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28017462/strain-initialized-robust-bone-surface-detection-in-3-d-ultrasound
#17
Mohammad Arafat Hussain, Antony J Hodgson, Rafeef Abugharbieh
Three-dimensional ultrasound has been increasingly considered as a safe radiation-free alternative to radiation-based fluoroscopic imaging for surgical guidance during computer-assisted orthopedic interventions, but because ultrasound images contain significant artifacts, it is challenging to automatically extract bone surfaces from these images. We propose an effective way to extract 3-D bone surfaces using a surface growing approach that is seeded from 2-D bone contours. The initial 2-D bone contours are estimated from a combination of ultrasound strain images and envelope power images...
December 22, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27988221/differential-diagnosis-of-breast-category-3-and-4-nodules-through-bi-rads-classification-in-conjunction-with-shear-wave-elastography
#18
Min Wang, Zhi Yang, Can Liu, Junhong Yan, Wenxiao Zhang, Jian Sun, Guanghe Cui
Ultrasound (US) has become one of the important imaging methods for differentiating benign from malignant breast lesions. In 2013, the American College of Radiology published the fifth edition of the Breast Imaging-Reporting and Data System (BI-RADS). BI-RADS is a guide with recommendations for the standardization of breast imaging (US, mammography and magnetic resonance imaging) reports and for the auditing of centers employing such methods. Its objective is to standardize the nomenclature used in the reports...
December 14, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27979668/time-harmonic-elastography-of-the-liver-is-sensitive-to-intrahepatic-pressure-gradient-and-liver-decompression-after-transjugular-intrahepatic-portosystemic-shunt-tips-implantation
#19
Heiko Tzschätzsch, Ingolf Sack, Stephan Rodrigo Marticorena Garcia, Selcan Ipek-Ugay, Jürgen Braun, Bernd Hamm, Christian E Althoff
We investigated the correlation between hepatic venous pressure gradient (HVPG) and liver shear wave speed (SWS) measured by multi-frequency time-harmonic ultrasound elastography (THE) before and after transjugular intrahepatic portosystemic shunt (TIPS) implantation. Ten patients with ascites, cirrhotic liver disease and portal hypertension were prospectively examined with invasive HVPG measurement and THE before and after TIPS implantation. HVPG and SWS decreased after TIPS placement from 20.4 ± 2.2 mmHg to 9...
December 12, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27979667/in%C3%A2-vivo-validation-of-volume-flow-measurements-of-pulsatile-flow-using-a-clinical-ultrasound-system-and-matrix-array-transducer
#20
John M Hudson, Ross Williams, Laurent Milot, Qifeng Wei, James Jago, Peter N Burns
The goal of this study was to evaluate the accuracy of a non-invasive C-plane Doppler estimation of pulsatile blood flow in the lower abdominal vessels of a porcine model. Doppler ultrasound measurements from a matrix array transducer system were compared with invasive volume flow measurements made on the same vessels with a surgically implanted ultrasonic transit-time flow probe. For volume flow rates ranging from 60 to 750 mL/min, agreement was very good, with a Pearson correlation coefficient of 0.97 (p < 0...
December 12, 2016: Ultrasound in Medicine & Biology
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