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3D ultrasound

Dirk Wildemeersch, Thomas Hasskamp, Kilian Nolte, Sohela Jandi, Ansgar Pett, Sabine Linden, Maarten van Santen, Olivier Julen
BACKGROUND: In the selection of an appropriate IUD little consideration is placed on device size or adequacy of fit. Properly fitting IUDs will likely lead to less adverse effects or patient discomfort resulting in enhanced continuation of use. METHODS: A multicenter study conducted at 7 centers in 410 nulliparous women, to measure the width of the uterine cavity using 2D and 3D ultrasound. RESULTS: Measurements of maximal fundal cavity width was performed by either 2D or 3D ultrasound by experienced sonographists...
September 21, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Minglei Yang, Hui Ding, Lei Zhu, Guangzhi Wang
PURPOSE: Ultrasound fusion imaging is an emerging tool and benefits a variety of clinical applications, such as image-guided diagnosis and treatment of hepatocellular carcinoma and unresectable liver metastases. However, respiratory liver motion-induced misalignment of multimodal images (i.e., fusion error) compromises the effectiveness and practicability of this method. The purpose of this paper is to develop a subject-specific liver motion model and automatic registration-based method to correct the fusion error...
October 13, 2016: Computers in Biology and Medicine
Enrico Agabiti Rosei
Current Hypertension Guidelines emphasize the importance of assessing the presence of preclinical organ damage. In fact, an extensive evaluation of organ damage may increase the number of patients classified at high CV risk and therefore strongly influence the clinical management of patients. Hypertensive heart disease remains to date the form of organ damage for which there is the greatest amount of evidence of a strong independent prognostic significance. In the presence of a chronic pressure overload, a parallel addition of sarcomers takes place with an increase in myocyte width, which in turn increases left ventricular wall thickness; myocyte hypertrophy is also associated with apoptosis, collagen deposition and ventricular fibrosis with an impairment of coronary hemodynamics as well, thus profoundly influencing functional properties of the left (and right) ventricle...
September 2016: Journal of Hypertension
Vincenza Granata, Roberta Fusco, Alfonso Reginelli, Luca Roberto, Francesco Granata, Daniela Rega, Antonio Rotondo, Roberto Grassi, Francesco Izzo, Antonella Petrillo
Anal cancer is uncommon neoplasm with an incidence of 2 new cases per 100,000 per year in the USA, accounting approximately 0.4 % of all tumors and 2.5 % of gastrointestinal malignancies. An early detection of the anal cancer is crucial for the patient management, whereas the diagnosis at an early stage allows conservative management with sphincter sparing, on the contrary a delays in diagnosis might lead to an advance cancer stage at presentation with worst survival. According to National Comprehensive Cancer Network (NCCN) Anal Carcinoma guidelines the patients should be subjected to a careful clinical examination, including a digital rectal examination (DRE), an anoscopic examination, and palpation of inguinal nodes...
2016: Infectious Agents and Cancer
Trevor J G Robinson, Shannon L Roberts, Robert S Burnham, Eldon Loh, Anne M Agur
Image-guided sensory block and radiofrequency ablation of the nerves innervating the sacro-iliac joint require readily identifiable bony landmarks for accurate needle/electrode placement. Understanding the relative locations of the transverse sacral tubercles along the lateral sacral crest is important for ultrasound guidance, as they demarcate the position of the posterior sacral network (S1-S3 ± L5/S4) innervating the posterior sacro-iliac joint. No studies were found that investigated the spatial relationships of these bony landmarks...
2016: BioMed Research International
Pedro Santos, Geir Haugen, Lasse Lovstakken, Eigil Samset, Jan D'hooge
Several clinical settings could benefit from 3D high frame rate (HFR) imaging and in particular, HFR 3D Tissue Doppler Imaging (TDI). To date, the proposed methodologies are based mostly on experimental ultrasound platforms, making their translation to clinical systems non-trivial as these have additional hardware constraints. In particular, clinically used 2D matrix array transducers rely on sub-aperture (SAP) beamforming to limit cabling between the ultrasound probe and the back-end console. Therefore, the present study aimed at assessing the feasibility of HFR 3D TDI using diverging waves (DW) on a clinical transducer with SAP beamforming limitations...
October 10, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Douglas Wildes, Warren Lee, Bruno Haider, Scott Cogan, Krishnakumar Sundaresan, David Mills, Christopher Yetter, Patrick Hart, Christopher Haun, Mikael Concepcion, Johan Kirkhorn, Marc Bitoun
We developed a 2.5 x 6.6 mm 2D array transducer with integrated transmit/receive ASIC for 4D ICE (real-time 3D IntraCardiac Echocardiography) applications. The ASIC and transducer design were optimized so that the high voltage transmit, low-voltage TGC (time-gain control) and preamp, subaperture beamformer, and digital control circuits for each transducer element all fit within the 0.019 mm2 area of the element. The transducer assembly was deployed in a 10 Fr (3.3 mm diameter) catheter, integrated with a GE Vivid1 E9 ultrasound imaging system, and evaluated in three pre-clinical studies...
October 12, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Shao-Wen Chung, Cho-Chiang Shih, Chih-Chung Huang
Ultrasound imaging has been extensively used for determining the severity of carotid atherosclerotic stenosis. In particular, the morphological characterization of carotid plaques can be performed for risk stratification of patients. However, using 2D ultrasound imaging for detecting morphological changes in plaques has several limitations. Due to the scan was performed on a single longitudinal cross-section, the selected 2D image is difficult to represent the entire morphology and volume of plaque and vessel lumen...
September 29, 2016: Ultrasonics
Diego Raimondo, Aly Youssef, Mohamed Mabrouk, Simona Del Forno, Valentina Martelli, Gianluigi Pilu, Nicola Rizzo, Letizia Zannoni, Roberto Paradisi, Renato Seracchioli
OBJECTIVE: Pelvic floor muscle (PFM) dysfunction seems to play an important role in the pathophysiology of pain in women with with pelvic pain syndromes, including deep infiltrating endometriosis (DIE). The aim of the study was to evaluate static and dynamic morphometry of PFM in women affected by DIE, in comparison to asymptomatic control women, using three-dimensional (3D) and four-dimensional (4D) transperineal ultrasound. METHODS: A pilot, prospective study was conducted between March 2015 and November 2015, at our tertiary center...
October 8, 2016: Ultrasound in Obstetrics & Gynecology
Mathieu Veyrat, Benjamin Verillaud, Philippe Herman, Damien Bresson
BACKGROUND: Endoscopic endonasal approaches (EEA) are an alternative for removing challenging nasopharyngeal or skull base lesions. In some cases, a nasoseptal flap (NSF) is not always available and such complex procedures may lead to carotid arteries exposition and/or dura mater (DM) wide opening. Meticulous carotid coverage and DM reconstruction are crucial for preventing early and delayed complications. METHOD: We propose a step-by-step description of the pedicled temporoparietal fascia flap (TPFF) technique, with a focus on its pitfalls, advantages and limits...
October 7, 2016: Acta Neurochirurgica
Marcelo de Melo Andrade Coura, Silvana Marques Silva, Romulo Medeiros de Almeida, Miles Castedo Forrest, João Batista Sousa
Background: Anal sphincter tone is routinely assessed by digital rectal examination in patients with fecal incontinence, although its accuracy in detecting sphincter defects or separating competent from incompetent muscles has not been established. Objective: In this setting, we aimed to evaluate the accuracy of digital rectal examination in grading anal defects in order to separate small from extensive cases as depicted on 3D endoanal ultrasound, using a scoring sphincter defect and correlate anal tone to anal pressures...
October 2016: Arquivos de Gastroenterologia
Covadonga Alvarez-Lopez, Javier De Santiago, Antonio Piñera, Roberto Rodriguez, Beatriz Herrero, Maria Herrera, Jaime Pillado, Ignacio Zapardiel
BACKGROUND: To determine the utility of three-dimensional (3D) sonography to control the position of hysteroscopic sterilizing device compared to hysterosalpingography (HSG). METHODS: A prospective observational study was carried out on 139 patients who underwent hysteroscopic tubal occlusion method between February 2012 and May 2013. Patients underwent 3D ultrasound scan to control device positioning, and they also underwent HSG as an additional control method...
October 6, 2016: Gynecologic and Obstetric Investigation
Alejandra Ortega, Jean Provost, Ling Tong, Pedro Santos, Brecht Heyde, Mathieu Pernot, Jan D'hooge
It was previously demonstrated in 2D echocardiography that a proper multi-line transmit (MLT) implementation can be used to increase frame rate while preserving image quality. Initial findings for extending MLT to 3D showed that it might address the low spatiotemporal resolution of current volumetric ultrasound systems. However, to date, it remains unclear how much transmit/receive parallelization would be possible using a 3D MLT system. Therefore, the aim of this study was to contrast different MLT setups for 3D imaging by computer simulation in order to determine an optimal trade-off between the amount of parallelization of a MLT system and the corresponding signal-to-noise ratio of the resulting images...
September 29, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Thanh M Bui, Alain Coron, Jonathan Mamou, Emi Saegusa-Beecroft, Tadashi Yamaguchi, Eugene Yanagihara, Junji Machi, S Lori Bridal, Ernest J Feleppa
OBJECTIVE: To detect metastases in freshly excised human lymph nodes (LNs) using 3-dimensional (3D), high-frequency, quantitative ultrasound (QUS) methods, the LN parenchyma (LNP) must be segmented to preclude QUS analysis of data in regions outside the LNP and to compensate ultrasound attenuation effects due to overlying layers of LNP and residual perinodal fat (PNF). METHODS: After restoring saturated radio-frequency signals from PNF using an approach based on smoothing-cubic splines, the three regions, i...
September 28, 2016: IEEE Transactions on Bio-medical Engineering
Florian S Frueh, Christina Körbel, Laura Gassert, Andreas Müller, Epameinondas Gousopoulos, Nicole Lindenblatt, Pietro Giovanoli, Matthias W Laschke, Michael D Menger
Secondary lymphedema is a common complication of cancer treatment characterized by chronic limb swelling with interstitial inflammation. The rodent hindlimb is a widely used model for the evaluation of novel lymphedema treatments. However, the assessment of limb volume in small animals is challenging. Recently, high-resolution three-dimensional (3D) imaging modalities have been introduced for rodent limb volumetry. In the present study we evaluated the validity of microcomputed tomography (μCT), magnetic resonance imaging (MRI) and ultrasound in comparison to conventional measuring techniques...
October 4, 2016: Scientific Reports
Omer Aydin, Eli Vlaisavljevich, Yasemin Yuksel Durmaz, Zhen Xu, Mohamed E H ElSayed
We have developed acoustically-activated nanodroplets (NDs) using an amphiphilic triblock copolymer, which self-assembles and encapsulates different perfluorocarbon including perfluoropentane (PFP) and perfluorohexane (PFH). Applying histotripsy waves (i.e. short, high pressure, ultrasound pulses) to solution of PFP- and PFH-NDs generated bubbles clouds at a significantly reduced acoustic pressure compared to the cavitation pressure observed for histotripsy treatment alone. In this report, we summarize the results of combining histotripsy waves at low frequency (345 and 500 kHz) with PFP-NDs and PFH-NDs on the ablation of PC-3 and C4-2B prostate cancer cells...
October 3, 2016: Molecular Pharmaceutics
Lucas Royer, Alexandre Krupa, Guillaume Dardenne, Anthony Le Bras, Eric Marchand, Maud Marchal
In this paper, we present a real-time approach that allows tracking deformable structures in 3D ultrasound sequences. Our method consists in obtaining the target displacements by combining robust dense motion estimation and mechanical model simulation. We perform evaluation of our method through simulated data, phantom data, and real-data. Results demonstrate that this novel approach has the advantage of providing correct motion estimation regarding different ultrasound shortcomings including speckle noise, large shadows and ultrasound gain variation...
September 15, 2016: Medical Image Analysis
Jairo Hernández, Adela Rodríguez-Fuentes, Maria Puopolo, Angela Palumbo
The aim of this study was to investigate whether the automatic measurement of follicular volume by three-dimensional (3D) ultrasound can predict the number of mature oocytes retrieved. A prospective cohort study including 47 women undergoing in vitro fertilization was conducted in a private fertility center. Follicular growth was monitored both manually and automatically using 3D scanning with SonoAVC on the day of human chorionic gonadotropin (hCG) administration. Regression analysis showed that under a standard protocol for hCG administration, the count of mature oocytes is well predicted by a multivariate model including the counts of follicles in the volume classes 2...
September 29, 2016: Reproductive Sciences
Martin Klemm, Thomas Kirchner, Janek Gröhl, Dominique Cheray, Marco Nolden, Alexander Seitel, Harald Hoppe, Lena Maier-Hein, Alfred M Franz
PURPOSE: Due to rapid developments in the research areas of medical imaging, medical image processing and robotics, computer-assisted interventions (CAI) are becoming an integral part of modern patient care. From a software engineering point of view, these systems are highly complex and research can benefit greatly from reusing software components. This is supported by a number of open-source toolkits for medical imaging and CAI such as the medical imaging interaction toolkit (MITK), the public software library for ultrasound imaging research (PLUS) and 3D Slicer...
September 29, 2016: International Journal of Computer Assisted Radiology and Surgery
Francesco Cenni, Davide Monari, Kaat Desloovere, Erwin Aertbeliën, Simon-Henri Schless, Herman Bruyninckx
BACKGROUND AND OBJECTIVE: Acquiring large anatomical volumes in a feasible manner is useful for clinical decision-making. A relatively new technique called 3D freehand ultrasonography is capable of this by combining a conventional 2D ultrasonography system. Currently, a thorough analysis of this technique is lacking, as the analyses are dependent on the software implementation details and the choice of measurement systems. Therefore this study starts by making this implementation available under the form of an open-source software library to perform 3D freehand ultrasonography...
November 2016: Computer Methods and Programs in Biomedicine
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