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3D ultrasound

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https://www.readbyqxmd.com/read/29350275/value-of-transperineal-ultrasound-on-the-observation-of-paravaginal-support
#1
Chaoran Dou, Qin Li, Tao Ying, Wen Shui, Yulin Yan, Yijia Luo, Xia Wang
OBJECTIVE: To explore the feasibility of three-dimensional (3D) transperineal ultrasound on the observation of paravaginal support in nulliparous and postpartum women. METHODS: Volume datasets were acquired in 50 nulliparous and 100 postpartum women using 3D transperineal ultrasound. Paravaginal supports were observed by studying the vaginal cross-sectional morphology. The extent of paravaginal support in specific level were evaluated by counting out at a 2 mm interval in tomographic ultrasound imaging mode in all subjects...
January 19, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29340161/direct-ice-imaging-from-inside-the-left-atrial-appendage-during-ablation-of-persistent-atrial-fibrillation
#2
Gabriel Cismaru, Mihai Puiu, Radu Rosu, Lucian Muresan, Gabriel Gusetu, Dana Pop, Dumitru Zdrenghea
We present the case of a 59-year-old patient with persistent atrial fibrillation, referred for atrial fibrillation ablation. The procedure was performed with the help of NAVX 3D mapping system (Saint Jude Medical) and iLAB Ultra ICE Plus ultrasound imaging catheter (Boston Scientific). The catheter permits cross-sectional images perpendicular to catheter's long axis. From inside left atrial appendage (LAA) looks trabeculated, due to pectinate muscles running parallel to each other. The presence of a thrombus was excluded from the appendage...
January 2018: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/29338474/subarachnoid-space-diameter-in-chromosomally-abnormal-fetuses-at-11-13-weeks-gestation
#3
Carolina Ferreira, Ana Lidia Rouxinol-Dias, Teresa Loureiro, Kypros Nicolaides
OBJECTIVES: To examine the subarachnoid space diameters in chromosomally abnormal fetuses at 11-13 weeks' gestation. METHODS: Stored three-dimensional (3D) ultrasound volumes of the fetal head at 11-13 weeks' gestation from 407 euploid and 88 chromosomally abnormal fetuses (trisomy 21, n = 40; trisomy 18, n = 19; trisomy 13, n = 7; triploidy, n = 14; Turner syndrome, n = 8) were analyzed. The subarachnoid space diameters, measured in the sagittal and transverse planes of the fetal head, in relation to biparietal diameter (BPD) in each group of aneuploidies was compared to that in euploid fetuses...
January 16, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29331575/validation-of-mri-to-trus-registration-for-high-dose-rate-prostate-brachytherapy
#4
Eric Poulin, Karim Boudam, Csaba Pinter, Samuel Kadoury, Andras Lasso, Gabor Fichtinger, Cynthia Ménard
PURPOSE: The objective of this study was to develop and validate an open-source module for MRI to transrectal ultrasound (TRUS) registration to support tumor-targeted prostate brachytherapy. METHODS AND MATERIALS: In this study, 15 patients with prostate cancer lesions visible on multiparametric MRI were selected for the validation. T2-weighted images with 1-mm isotropic voxel size and diffusion weighted images were acquired on a 1.5T Siemens imager. Three-dimensional (3D) TRUS images with 0...
January 10, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29330658/patient-specific-model-based-segmentation-of-brain-tumors-in-3d-intraoperative-ultrasound-images
#5
Elisee Ilunga-Mbuyamba, Juan Gabriel Avina-Cervantes, Dirk Lindner, Felix Arlt, Jean Fulbert Ituna-Yudonago, Claire Chalopin
PURPOSE: Intraoperative ultrasound (iUS) imaging is commonly used to support brain tumor operation. The tumor segmentation in the iUS images is a difficult task and still under improvement because of the low signal-to-noise ratio. The success of automatic methods is also limited due to the high noise sensibility. Therefore, an alternative brain tumor segmentation method in 3D-iUS data using a tumor model obtained from magnetic resonance (MR) data for local MR-iUS registration is presented in this paper...
January 12, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29315789/three-dimensional-shear-wave-elastography-for-differentiating-benign-from-malignant-thyroid-nodules
#6
Chong-Ke Zhao, Shi-Gao Chen, Azra Alizad, Ya-Ping He, Qiao Wang, Dan Wang, Wen-Wen Yue, Kun Zhang, Shen Qu, Qing Wei, Hui-Xiong Xu
OBJECTIVES: To prospectively evaluate the diagnostic performance of 3-dimensional (3D) shear wave elastography (SWE) for assessing thyroid nodules. METHODS: A total of 176 surgically or cytologically confirmed thyroid nodules (63 malignant and 113 benign) in 176 patients who had undergone conventional ultrasound (US), 2-dimensional (2D) SWE, and 3D SWE examinations were included in this study. Quantitative elasticity values (mean elasticity, maximum elasticity, and standard deviation of elasticity of a large region of interest and mean elasticity of a 2-mm region of interest) were measured on 2D and 3D SWE...
January 9, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29302784/initial-results-of-the-fusion-x-us-prototype-combining-3d-automated-breast-ultrasound-and-digital-breast-tomosynthesis
#7
Benedikt Schaefgen, Joerg Heil, Richard G Barr, Marcus Radicke, Aba Harcos, Christina Gomez, Anne Stieber, André Hennigs, Alexandra von Au, Julia Spratte, Geraldine Rauch, Joachim Rom, Florian Schütz, Christof Sohn, Michael Golatta
PURPOSE: To determine the feasibility of a prototype device combining 3D-automated breast ultrasound (ABVS) and digital breast tomosynthesis in a single device to detect and characterize breast lesions. METHODS: In this prospective feasibility study, the FUSION-X-US prototype was used to perform digital breast tomosynthesis and ABVS in 23 patients with an indication for tomosynthesis based on current guidelines after clinical examination and standard imaging. The ABVS and tomosynthesis images of the prototype were interpreted separately by two blinded experts...
January 4, 2018: European Radiology
https://www.readbyqxmd.com/read/29301211/3d-indoor-positioning-of-uavs-with-spread-spectrum-ultrasound-and-time-of-flight-cameras
#8
José A Paredes, Fernando J Álvarez, Teodoro Aguilera, José M Villadangos
This work proposes the use of a hybrid acoustic and optical indoor positioning system for the accurate 3D positioning of Unmanned Aerial Vehicles (UAVs). The acoustic module of this system is based on a Time-Code Division Multiple Access (T-CDMA) scheme, where the sequential emission of five spread spectrum ultrasonic codes is performed to compute the horizontal vehicle position following a 2D multilateration procedure. The optical module is based on a Time-Of-Flight (TOF) camera that provides an initial estimation for the vehicle height...
December 30, 2017: Sensors
https://www.readbyqxmd.com/read/29297234/the-effect-of-modulated-electro-hyperthermia-on-temperature-and-blood-flow-in-human-cervical-carcinoma
#9
Lee Sun-Young, Jong-Hun Kim, Yeon-Hee Han, Dong-Hyu Cho
INTRODUCTION: Mild hyperthermia has been known to enhance the response of tumors to radiotherapy or chemotherapy by increasing tumor blood flow, thereby increasing tumor oxygenation or drug delivery. The purpose of this study was to assess the changes in temperature and blood flow in human cervical cancer in response to regional heating with modulated electro-hyperthermia (mEHT). METHODS: The pelvic area of 20 patients with cervical carcinoma was heated with mEHT...
January 3, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29296565/optimization-of-ultrasound-assisted-extraction-of-glycyrrhizic-acid-from-licorice-using-response-surface-methodology
#10
Seol Jang, A Yeong Lee, A Reum Lee, Goya Choi, Ho Kyoung Kim
Background: The present study optimized ultrasound-assisted extraction conditions to maximize extraction yields of glycyrrhizic acid from licorice. Methods: The optimal extraction temperature (X1), extraction time (X2), and methanol concentration (X3) were identified using response surface methodology (RSM). A central composite design (CCD) was used for experimental design and analysis of the results to obtain the optimal processing parameters. Results: Statistical analyses revealed that three variables and the quadratic of X1, X2, and X3 had significant effects on the yields and were followed by significant interaction effects between the variables of X2 and X3 (p < 0...
December 2017: Integrative Medicine Research
https://www.readbyqxmd.com/read/29290810/tumour-vascular-shutdown-and-cell-death-following-ultrasound-microbubble-enhanced-radiation-therapy
#11
Ahmed El Kaffas, Mehrdad J Gangeh, Golnaz Farhat, William Tyler Tran, Amr Hashim, Anoja Giles, Gregory J Czarnota
High-dose radiotherapy effects are regulated by acute tumour endothelial cell death followed by rapid tumour cell death instead of canonical DNA break damage. Pre-treatment with ultrasound-stimulated microbubbles (USMB) has enabled higher-dose radiation effects with conventional radiation doses. This study aimed to confirm acute and longitudinal relationships between vascular shutdown and tumour cell death following radiation and USMB in a wild type murine fibrosarcoma model using in vivo imaging. Methods: Tumour xenografts were treated with single radiation doses of 2 or 8 Gy alone, or in combination with low-/high-concentration USMB...
2018: Theranostics
https://www.readbyqxmd.com/read/29290798/ultrasound-molecular-imaging-of-vegfr-2-in-clear-cell-renal-cell-carcinoma-tracks-disease-response-to-antiangiogenic-and-notch-inhibition-therapy
#12
Juan D Rojas, Fanglue Lin, Yun-Chen Chiang, Anna Chytil, Diana C Chong, Victoria L Bautch, W Kimryn Rathmell, Paul A Dayton
Metastatic clear-cell renal cell carcinoma (ccRCC) affects thousands of patients worldwide each year. Antiangiogenic therapy has been shown to have beneficial effects initially, but resistance is eventually developed. Therefore, it is important to accurately track the response of cancer to different therapeutics in order to appropriately adjust the therapy to maximize efficacy. Change in tumor volume is the current gold standard for determining efficacy of treatment. However, functional variations can occur much earlier than measurable volume changes...
2018: Theranostics
https://www.readbyqxmd.com/read/29286445/3d-ultrasound-imaging-fast-and-cost-effective-morphometry-of-musculoskeletal-tissue
#13
Guido Weide, Stephan van der Zwaard, Peter A Huijing, Richard T Jaspers, Jaap Harlaar
The developmental goal of 3D ultrasound imaging (3DUS) is to engineer a modality to perform 3D morphological ultrasound analysis of human muscles. 3DUS images are constructed from calibrated freehand 2D B-mode ultrasound images, which are positioned into a voxel array. Ultrasound (US) imaging allows quantification of muscle size, fascicle length, and angle of pennation. These morphological variables are important determinants of muscle force and length range of force exertion. The presented protocol describes an approach to determine volume and fascicle length of m...
November 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29284336/prenatal-diagnosis-of-seckel-syndrome-at-21-weeks-gestation-and-review-of-the-literature
#14
Mehmet Ozgur Akkurt, Kaan Pakay, Iltac Akkurt, Muzaffer Temur, Engin Korkmazer
BACKGROUND: The Seckel syndrome is an autosomal recessive inherited disorder that characterized severe pre- and post-natal growth restriction, microcephaly and a bird-like fetal head appearance. A few clinical reports revealed prenatal sonographic findings in the literature. CASE: A 29-year-old, Turkish, gravid 3, para 2, woman was referred to our center for further evaluation of a suspicion of microcephaly at 21 weeks' gestation. The couple was third degree consanguineous...
December 28, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29280236/advanced-pediatric-neurosonography-techniques-contrast-enhanced-ultrasonography-elastography-and-beyond
#15
REVIEW
Misun Hwang, Becky J Riggs, Joseph Katz, Donna Seyfert, Frances Northington, Robinson Shenandoah, Irina Burd, Justin McArthur, Kassa Darge, Matthew A Thimm, Thierry A G M Huisman
Recent technical advances in neurosonography continue broadening the diagnostic utility, sensitivity, and specificity of ultrasound for detecting intracranial abnormalities bed side. The clinical and functional applications of neurosonography have significantly expanded since the 1980s when transcranial Doppler sonography first allowed anatomic and hemodynamic delineation of the intracranial vessels through the thin temporal skull. In the past few years, contrast-enhanced ultrasonography, elastography, 3D/4D reconstruction tools, and high-resolution microvessel imaging techniques have further enhanced the diagnostic significance of neurosonography...
December 27, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29280208/medial-gastrocnemius-muscle-stiffness-cannot-explain-the-increased-ankle-joint-range-of-motion-following-passive-stretching-in-children-with-cerebral-palsy
#16
Barbara M Kalkman, Lynn Bar-On, Francesco Cenni, Constantinos N Maganaris, Alfie Bass, Gill Holmes, Kaat Desloovere, Gabor J Barton, Thomas D O'Brien
Stretching is often used to increase/maintain joint range of motion (ROM) in children with cerebral palsy (CP) but the effectiveness of these interventions is limited. Therefore, this study aimed to determine the acute changes in muscle-tendon lengthening properties that contribute to increased ROM after a bout of stretching in children with CP. Eleven children with spastic CP (age:12.1(3)y, 5/6 hemiplegia/diplegia, 7/4 GMFCS level I/II) participated in this study. Each child received 3 sets of 5 × 20 s passive, manual static dorsiflexion stretches separated by 30 s rest, and 60 s rest between sets...
December 26, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29277277/new-imaging-markers-for-preconceptional-and-first-trimester-utero-placental-vascularization
#17
I F Reijnders, A G M G J Mulders, M P H Koster, A H J Koning, A Frudiger, S P Willemsen, E Jauniaux, G J Burton, R P M Steegers-Theunissen, E A P Steegers
INTRODUCTION: The availability of imaging makers of early placental circulation development is limited. This study aims to develop a feasible and reliable method to assess preconceptional and early first-trimester utero-placental vascular volumes using three-dimensional power Doppler (3D PD) ultrasound on two different Virtual Reality (VR) systems. METHODS: 3D PD ultrasound images of the uterine and placental vasculature were obtained in 35 women, either preconceptionally (n = 5), or during pregnancy at 7 (n = 10), 9 (n = 10) or 11 (n = 10) weeks of gestation...
January 2018: Placenta
https://www.readbyqxmd.com/read/29274686/fluid-structure-interaction-models-based-on-patient-specific-ivus-at-baseline-and-follow-up-for-prediction-of-coronary-plaque-progression-by-morphological-and-biomechanical-factors-a-preliminary-study
#18
Liang Wang, Dalin Tang, Akiko Maehara, Zheyang Wu, Chun Yang, David Muccigrosso, Jie Zheng, Richard Bach, Kristen L Billiar, Gary S Mintz
Plaque morphology and biomechanics are believed to be closely associated with plaque progression. In this paper, we test the hypothesis that integrating morphological and biomechanical risk factors would result in better predictive power for plaque progression prediction. A sample size of 374 intravascular ultrasound (IVUS) slices was obtained from 9 patients with IVUS follow-up data. 3D fluid-structure interaction models were constructed to obtain both structural stress/strain and fluid biomechanical conditions...
December 15, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29246176/evaluation-of-three-dimensional-sonoavc-ultrasound-for-antral-follicle-count-in-infertile-women-its-agreement-with-conventional-two-dimensional-ultrasound-and-serum-levels-of-anti-m%C3%A3-llerian-hormone
#19
P A Peres Fagundes, R Chapon, P R Olsen, A K Schuster, M M C Mattia, J S Cunha-Filho
BACKGROUND: Several studies have reported a correlation between antral follicle count by conventional 2D transvaginal sonography and serum anti-Müllerian hormone levels. However, few studies have investigated the effectiveness of 3D SonoAVC transvaginal ultrasound technology, particularly in infertile women. Therefore, this study aims to evaluate the usefulness of three-dimensional (3D) SonoAVC transvaginal ultrasound technology for antral follicle count and its correlation to conventional two-dimensional (2D) transvaginal ultrasound and serum levels of anti-Müllerian hormone in infertile women...
December 16, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/29243838/evaluation-of-umbilical-vein-blood-volume-flow-in-preeclampsia-by-angle-independent-3d-sonography
#20
Stephen Z Pinter, Oliver D Kripfgans, Marjorie C Treadwell, Anna W Kneitel, J Brian Fowlkes, Jonathan M Rubin
OBJECTIVES: To investigate the association between umbilical vein blood volume flow and the condition of preeclampsia in an at-risk maternal patient cohort. Umbilical vein volume flow was quantified by a 3-dimensional (3D) sonographic technique that overcomes several limitations of standard sonographic flow measurement methods. METHODS: A total of 35 patients, each with a singleton pregnancy, were recruited to provide 5 patients with preeclampsia, derived as a subset from a 26-patient at-risk group, and 9 patients with normal pregnancies...
December 15, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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