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3D ultrasound

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https://www.readbyqxmd.com/read/28634015/three-dimensional-3d-printed-model-for-deep-infiltrating-endometriosis-die-a-case-report
#1
Mobolaji O Ajao, Nisse V Clark, Tatiana Kelil, Sarah L Cohen, Jon I Einarsson
The combination of a thorough physical exam and imaging with either MRI or pelvic ultrasound are important in pre-operative planning for deep infiltrating endometriosis. Nevertheless, the 2-dimensional rendering of the pathology by imaging does not always accurately represent intra-operative findings. An in-depth topographical relationship and extent of surrounding tissue invasion can be better appreciated from 3-dimensional modeling. A 49 year old patient with history of endometriosis and persistent pain underwent pre-operative imaging with MRI that was consistent with infiltrating endometriosis...
June 17, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28632498/can-early-ultrasonography-explain-the-lower-miscarriage-rates-in-twin-as-compared-to-singleton-pregnancies-following-assisted-reproduction
#2
Ana Póvoa, Alexandra Matias, Pedro Xavier, Isaac Blickstein
OBJECTIVE: To compare first trimester 2D conventional and 3D power Doppler angiography measures in twins and singletons following assisted reproduction. METHODS: We prospectively evaluated 50 singleton and 47 twin pregnancies that eventually ended in live births. Patients were recruited from a single assisted reproductive technology (ART) center with standard treatment protocols. Obstetric ultrasound was performed at 8-9 weeks +6 days. Intervillous flow, uteroplacental circulation and uterine artery pulsatility (PI) and resistance index (RI) using two-dimensional (2D) ultrasound examination were evaluated...
June 20, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28629785/-interest-using-3d-ultrasound-and-mri-fusion-biopsy-for-prostate-cancer-detection
#3
A Marien, A De Castro Abreu, I Gill, A Villers, O Ukimura
INTRODUCTION: The strategic therapy for prostate cancer depends on histo-pronostics data, which could be upgraded by obtaining targeted biopsies (TB) with MRI (magnetic resonance imagery) fusion 3D ultrasound. OBJECTIVES: To compare diagnostic yield of image fusion guided prostate biopsy using image fusion of multi-parametric MRI (mpMRI) with 3D-TRUS. MATERIALS AND METHODS: Between January 2010 and April 2013, 179 consecutive patients underwent outpatient TRUS biopsy using the real-time 3D TRUS tracking system (Urostation™)...
June 16, 2017: Progrès en Urologie
https://www.readbyqxmd.com/read/28627330/gpu-accelerated-kernel-regression-reconstruction-for-freehand-3d-ultrasound-imaging
#4
Tiexiang Wen, Ling Li, Qingsong Zhu, Wenjian Qin, Jia Gu, Feng Yang, Yaoqin Xie
Volume reconstruction method plays an important role in improving reconstructed volumetric image quality for freehand three-dimensional (3D) ultrasound imaging. By utilizing the capability of programmable graphics processing unit (GPU), we can achieve a real-time incremental volume reconstruction at a speed of 25-50 frames per second (fps). After incremental reconstruction and visualization, hole-filling is performed on GPU to fill remaining empty voxels. However, traditional pixel nearest neighbor-based hole-filling fails to reconstruct volume with high image quality...
July 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28623369/looking-beyond-the-imaging-plane-3d-needle-tracking-with-a-linear-array-ultrasound-probe
#5
Wenfeng Xia, Simeon J West, Malcolm C Finlay, Jean-Martial Mari, Sebastien Ourselin, Anna L David, Adrien E Desjardins
Ultrasound is well suited for guiding many minimally invasive procedures, but its use is often precluded by the poor visibility of medical devices. When devices are not visible, they can damage critical structures, with life-threatening complications. Here, we developed the first ultrasound probe that comprises both focused and unfocused transducer elements to provide both 2D B-mode ultrasound imaging and 3D ultrasonic needle tracking. A fibre-optic hydrophone was integrated into a needle to receive Golay-coded transmissions from the probe and these data were processed to obtain tracking images of the needle tip...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620930/prospective-multimodal-imaging-assessment-of-locally-advanced-cervical-cancer-patients-administered-by-chemoradiation-followed-by-radical-surgery-the-price-prospective-imaging-of-cervical-cancer-and-neoadjuvant-treatment-study-the-role-of-ultrasound
#6
A C Testa, G Ferrandina, F Moro, T Pasciuto, M C Moruzzi, I De Blasis, F Mascilini, E Foti, R Autorino, A Collarino, B Gui, G F Zannoni, M A Gambacorta, A L Valentini, V Rufini, G Scambia
OBJECTIVE: Chemoradiation-based neoadjuvant treatment followed by radical surgery is an alternative therapeutic strategy for locally advanced cervical cancer (LACC) -stage ≥ IB2 (except of IIA1)- but ultrasound variables used to predict neoadjuvant partial response are not well defined. The goal of this study was to prospectively analyze the potential role of transvaginal ultrasound (TVUS) in early predicting pathologically assessed residual disease in a large, single-institution series of LACC patients triaged to neoadjuvant treatment followed by radical surgery...
June 16, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28620014/the-tendinopathic-achilles-tendon-does-not-remain-iso-volumetric-upon-repeated-loading-insights-from-3d-ultrasound
#7
Leila Nuri, Steven J Obst, Richard Newsham-West, Rod S Barrett
Mid-portion Achilles tendinopathy (MAT) alters the normal three-dimensional (3D) morphology of the Achilles tendon (AT) at rest and under a single tensile load. However, how MAT changes the 3D morphology of AT during repeated loading remains unclear. This study compared the AT longitudinal, transverse and volume strains during repeated loading in MAT with those of the contralateral tendon in people with unilateral MAT. Ten adults with unilateral MAT performed 10 successive 25 second submaximal (50%) voluntary isometric plantarflexion contractions with both legs...
June 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28617404/-reconstructive-otoplasty-differentiated-approach-to-rib-cartilage-processing-and-ear-framework-formation-using-carving-technique
#8
T Z Chkadua, G V Asirova, F K Mustafina, M M Chernenkiy, S S Frolov, D L Vejze
The aim of the research was to optimize surgical rehabilitation of patients with auricle defects and deformities by the developing of differentiated approach to the choice of reconstructive otoplasty method. The study involved 30 patients with auricle defects and deformities of congenital (20 patients) and acquired (10 patients) etiology. The defects were total in 25 patients and partial in 5 patients. All patients underwent ear reconstruction with rib cartilage using carving technique. Preoperative planning was based in Doppler ultrasound of temporal region vessels, laser Doppler flowmetry, temporal skin ultrasound and 3D ribcage CT...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28615794/deepinfer-open-source-deep-learning-deployment-toolkit-for-image-guided-therapy
#9
Alireza Mehrtash, Mehran Pesteie, Jorden Hetherington, Peter A Behringer, Tina Kapur, William M Wells, Robert Rohling, Andriy Fedorov, Purang Abolmaesumi
Deep learning models have outperformed some of the previous state-of-the-art approaches in medical image analysis. Instead of using hand-engineered features, deep models attempt to automatically extract hierarchical representations at multiple levels of abstraction from the data. Therefore, deep models are usually considered to be more flexible and robust solutions for image analysis problems compared to conventional computer vision models. They have demonstrated significant improvements in computer-aided diagnosis and automatic medical image analysis applied to such tasks as image segmentation, classification and registration...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28609110/monitoring-tumor-volume-in-patients-with-prostate-cancer-undergoing-active-surveillance-is-mri-apparent-diffusion-coefficient-indicative-of-tumor-growth
#10
Veronica A Morgan, Christopher Parker, Alison MacDonald, Karen Thomas, Nandita M deSouza
OBJECTIVE: The purpose of this study was to measure longitudinal change in tumor volume of the dominant intraprostatic lesion and determine whether baseline apparent diffusion coefficient (ADC) and change in ADC are indicative of tumor growth in patients with prostate cancer undergoing active surveillance. SUBJECTS AND METHODS: The study group included 151 men (mean age, 68.1 ± 7.4 [SD] years; range, 50-83 years) undergoing active surveillance with 3D whole prostate, zonal, and tumor volumetric findings documented at endorectal MRI examinations performed at two time points (median interval, 1...
June 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28593506/conformal-mapping-of-carotid-vessel-wall-and-plaque-thickness-measured-from-3d-ultrasound-images
#11
Gary P T Choi, Yimin Chen, Lok Ming Lui, Bernard Chiu
Measurements of vessel-wall-plus-plaque thickness (VWT) from 3D carotid ultrasound have been shown to be sensitive to the effect of pharmaceutical interventions. Since the geometry of carotid arteries is highly subject-specific, quantitative comparison of the distributions of point-wise VWT measured for different patients or for the same patients at different ultrasound scanning sessions requires the development of a mapping strategy to adjust for the geometric variability of different carotid surface models...
June 7, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28593430/the-prevalence-and-significance-of-renal-perfusion-defects-in-early-kidney-transplants-quantified-using-3d-contrast-enhanced-ultrasound-ceus
#12
Ben Stenberg, M Wilkinson, S Elliott, N Caplan
OBJECTIVES: Vascular complications are one of the most common causes of early kidney transplant dysfunction. Contrast enhanced ultrasound increases sensitivity to vascular changes. The aim of this study was to assess the prevalence and size of vascular abnormalities in early renal transplants using 3D CEUS and the significance of perfusion defects on renal function. METHODS: Ninety-nine renal transplant patients underwent 3D CEUS after surgery to quantify perfusion defects as percentage total renal volume (TRV)...
June 7, 2017: European Radiology
https://www.readbyqxmd.com/read/28589650/validity-and-reliability-of-a-structured-light-3d-scanner-and-an-ultrasound-imaging-system-for-measurements-of-facial-skin-thickness
#13
Kang-Woo Lee, Sang-Hwan Kim, Young-Chun Gil, Kyung-Seok Hu, Hee-Jin Kim
INTRODUCTION: Three-dimensional (3 D)-scanning-based morphological studies of the face are commonly included in various clinical procedures. This study evaluated validity and reliability of a 3 D scanning system by comparing the ultrasound (US) imaging system versus the direct measurement of facial skin. MATERIALS AND METHODS: The facial skin thickness at 19 landmarks was measured using the three different methods in 10 embalmed adult Korean cadavers. Skin thickness was first measured using the ultrasound device, then 3 D scanning of the facial skin surface was performed...
June 7, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28586106/sonographic-measurement-of-cervical-volume-in-pregnant-women-at-high-risk-of-preterm-birth-using-a-geometric-formula-for-a-frustum-versus-3-dimensional-automated-virtual-organ-computer-aided-analysis
#14
Ahmed I Ahmed, Sarah R Aldhaheri, Javier Rodriguez-Kovacs, Deepa Narasimhulu, Manesha Putra, Howard Minkoff, Shoshana Haberman
OBJECTIVES: To compare cervical volume measurements by 3-dimensional (3D) sonography using Virtual Organ computer-aided analysis (VOCAL; GE Healthcare, Milwaukee, WI) versus a manual method using a geometric formula for a frustum. METHODS: We included 142 asymptomatic pregnant women at 16 to 24 weeks gestation at high risk for preterm birth. With a Voluson 730 Expert system (GE Healthcare), they underwent 2-dimensional (2D) transvaginal sonographic cervical length measurements and 3D cervical volume acquisition...
June 6, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28585511/three-dimensional-ultrasound-elasticity-imaging-on-an-automated-breast-volume-scanning-system
#15
Yuqi Wang, Haidy G Nasief, Sarah Kohn, Andy Milkowski, Tom Clary, Stephen Barnes, Paul E Barbone, Timothy J Hall
Ultrasound elasticity imaging has demonstrated utility in breast imaging, but it is typically performed with handheld transducers and two-dimensional imaging. Two-dimensional (2D) elastography images tissue stiffness of only a plane and hence suffers from errors due to out-of-plane motion, whereas three-dimensional (3D) data acquisition and motion tracking can be used to track out-of-plane motion that is lost in 2D elastography systems. A commercially available automated breast volume scanning system that acquires 3D ultrasound data with precisely controlled elevational movement of the 1D array ultrasound transducer was employed in this study...
June 1, 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28585063/enabling-real-time-volume-rendering-of-functional-magnetic-resonance-imaging-on-an-ios-device
#16
Joseph Holub, Eliot Winer
Powerful non-invasive imaging technologies like computed tomography (CT), ultrasound, and magnetic resonance imaging (MRI) are used daily by medical professionals to diagnose and treat patients. While 2D slice viewers have long been the standard, many tools allowing 3D representations of digital medical data are now available. The newest imaging advancement, functional MRI (fMRI) technology, has changed medical imaging from viewing static to dynamic physiology (4D) over time, particularly to study brain activity...
June 5, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28582803/a-random-walk-based-segmentation-framework-for-3d-ultrasound-images-of-the-prostate
#17
Ling Ma, Rongrong Guo, Zhiqiang Tian, Baowei Fei
PURPOSE: Accurate segmentation of the prostate on ultrasound images has many applications in prostate cancer diagnosis and therapy. Transrectal ultrasound (TRUS) has been routinely used to guide prostate biopsy. This manuscript proposes a semiautomatic segmentation method for the prostate on three-dimensional (3D) TRUS images. METHODS: The proposed segmentation method uses a context-classification based, random walk algorithm. Because context information reflects patient-specific characteristics and prostate changes in the adjacent slices, and classification information reflects population-based prior knowledge, we combine the context and classification information at the same time in order to define the applicable population and patient-specific knowledge so as to more accurately determine the seed points for the random walk algorithm...
June 5, 2017: Medical Physics
https://www.readbyqxmd.com/read/28576644/real-time-electromagnetic-tracking-based-treatment-platform-for-high-dose-rate-prostate-brachytherapy-clinical-workflows-and-end-to-end-validation
#18
Luc Beaulieu, Emmanuel Racine, Dae Yup Han, Eric Vigneault, I-Chow Hsu, J Adam M Cunha
PURPOSE: New technologies were integrated into a novel treatment platform combining electromagnetically (EM) tracked catheters, a 3D ultrasound (3DUS) imaging device, and a new treatment planning system to provide a real-time prostate high-dose-rate (HDR) brachytherapy treatment system. This work defines workflows for offline CT and online 3DUS planning scenarios and preclinical end-to-end validation of the platform. METHODS AND MATERIALS: The platform is composed of an EM-tracked stylet, a EM-tracked 3DUS probe, and an EM-tracked template guide, all used with the NDI Aurora field generator (NDI, Ontario, Canada)...
May 30, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28574344/a-framework-for-the-generation-of-realistic-synthetic-cardiac-ultrasound-and-magnetic-resonance-imaging-sequences-from-the-same-virtual-patients
#19
Yitian Zhou, Sophie Giffard-Roisin, Mathieu De Craene, Sorina Camarasu-Pop, Jan D'hooge, Martino Alessandrini, Denis Friboulet, Maxime Sermesant, Olivier Bernard
The use of synthetic sequences is one of the most promising tools for advanced in silico evaluation of the quantification of cardiac deformation and strain through 3D ultrasound (US) and magnetic resonance (MR) imaging. In this paper, we propose the first simulation framework which allows the generation of realistic 3D synthetic cardiac US and MR (both cine and tagging) image sequences from the same virtual patient. A state-of-the-art electromechanical (E/M) model was exploited for simulating groundtruth cardiac motion fields ranging from healthy to various pathological cases including both ventricular dyssynchrony and myocardial ischemia...
May 25, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28574192/feasibility-study-of-ultrasound-imaging-for-stereotactic-body-radiation-therapy-with-active-breathing-coordinator-in-pancreatic-cancer
#20
Lin Su, Iulian Iordachita, Yin Zhang, Junghoon Lee, Sook Kien Ng, Juan Jackson, Ted Hooker, John Wong, Joseph M Herman, H Tutkun Sen, Peter Kazanzides, Muyinatu A Lediju Bell, Chen Yang, Kai Ding
PURPOSE: Stereotactic body radiation therapy (SBRT) allows for high radiation doses to be delivered to the pancreatic tumors with limited toxicity. Nevertheless, the respiratory motion of the pancreas introduces major uncertainty during SBRT. Ultrasound imaging is a non-ionizing, non-invasive, and real-time technique for intrafraction monitoring. A configuration is not available to place the ultrasound probe during pancreas SBRT for monitoring. METHODS AND MATERIALS: An arm-bridge system was designed and built...
June 2, 2017: Journal of Applied Clinical Medical Physics
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