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https://www.readbyqxmd.com/read/28239843/liver-transection-using-indocyanine-green-fluorescence-imaging-and-hepatic-vein-clamping
#1
Y Kawaguchi, Y Nomura, M Nagai, D Koike, Y Sakuraoka, T Ishida, T Ishizawa, N Kokudo, N Tanaka
BACKGROUND: Three-dimensional (3D) imaging has facilitated liver resection with excision of hepatic veins by estimating the liver volume of portal and hepatic venous territories. However, 3D imaging cannot be used for real-time navigation to determine the liver transection line. This study assessed the value of indocyanine green (ICG) fluorescence imaging with hepatic vein clamping for navigation during liver transection. METHODS: Consecutive patients who underwent liver resection with excision of major hepatic veins between 2012 and 2013 were evaluated using ICG fluorescence imaging after clamping veins and injecting ICG...
February 27, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28239628/cubic-meter-volume-optical-coherence-tomography
#2
Zhao Wang, Benjamin Potsaid, Long Chen, Chris Doerr, Hsiang-Chieh Lee, Torben Nielson, Vijaysekhar Jayaraman, Alex E Cable, Eric Swanson, James G Fujimoto
Optical coherence tomography (OCT) is a powerful three-dimensional (3D) imaging modality with micrometer-scale axial resolution and up to multi-GigaVoxel/s imaging speed. However, the imaging range of high-speed OCT has been limited. Here, we report 3D OCT over cubic meter volumes using a long coherence length, 1310 nm vertical-cavity surface-emitting laser and silicon photonic integrated circuit dual-quadrature receiver technology combined with enhanced signal processing. We achieved 15 µm depth resolution for tomographic imaging at a 100 kHz axial scan rate over a 1...
December 2016: Optica
https://www.readbyqxmd.com/read/28239554/the-development-and-characterization-of-a-novel-yet-simple-3d-printed-tool-to-facilitate-phantom-imaging-of-photoacoustic-contrast-agents
#3
Santiago J Arconada-Alvarez, Jeanne E Lemaster, Junxin Wang, Jesse V Jokerst
We report a new approach to preparing phantoms using 3D printing. This device supports plastic tubing containing the contrast agent and is immersed in a solution with absorption or scattering properties that mimic tissue. Up to 12 tubing samples could be placed in the device with sample-to-sample spacing as low as 0.3 mm and at a constant distance from the transducer (±0.16 mm), which is critical in validating photoacoustic contrast agents. We also studied different types of tubing and found that tubing with a larger outside diameter has more inherent signal...
March 2017: Photoacoustics
https://www.readbyqxmd.com/read/28238587/clinical-implications-of-three-dimensional-real-time-color-doppler-transthoracic-echocardiography-in-quantifying-mitral-regurgitation-a-comparison-with-conventional-two-dimensional-methods
#4
Ran Heo, Jang-Won Son, Briain Ó Hartaigh, Hyuk-Jae Chang, Young-Jin Kim, Saurabh Datta, In-Jeong Cho, Chi Young Shim, Geu-Ru Hong, Jong-Won Ha, Namsik Chung
BACKGROUND: Automatic quantification of real-time three-dimensional (3D) full-volume color Doppler transthoracic echocardiography (FVCD) has been proposed as a feasible and accurate method for quantifying MR. We aimed to explore the clinical implications of real-time 3D-FVCD for mitral regurgitation (MR) with various clinical manifestations, in comparison with the conventional two-dimensional (2D) proximal isovelocity surface area (PISA) and volumetric method and cardiac magnetic resonance imaging (CMR) methods...
February 23, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28238007/radiation-induced-liver-injury-after-3d-conformal-radiotherapy-for-hepatocellular-carcinoma-quantitative-assessment-using-gd-eob-dtpa-enhanced-mri
#5
Yoshiyuki Fukugawa, Tomohiro Namimoto, Ryo Toya, Tetsuo Saito, Hideaki Yuki, Tomohiko Matsuyama, Osamu Ikeda, Yasuyuki Yamashita, Natsuo Oya
Focal liver reaction (FLR) appears in the hepatobiliary-phase images of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid-enhanced magnetic resonance imaging (Gd-EOB-DTPA-enhanced MRI) following radiotherapy (RT). We investigated the threshold dose (TD) for FLR development in 13 patients with hepatocellular carcinoma (HCC) who underwent three-dimensional conformal radiotherapy (3D-CRT) with 45 Gy in 15 fractions. FLR volumes (FLRVs) were calculated based on planning CT images by referring to fused hepatobiliary- phase images...
February 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28237921/curvilinear-structure-analysis-by-ranking-the-orientation-responses-of-path-operators
#6
Odyssee Merveille, Hugues Talbot, Laurent Najman, Nicolas Passat
The analysis of thin curvilinear objects in 3D images is a complex and challenging task. In this article, we introduce a new, nonlinear operator, called RORPO (Ranking Orientation Responses of Path Operators). Inspired by the multidirectional paradigm currently used in linear filtering for thin structure analysis, RORPO is built upon the notion of path operator from mathematical morphology. This operator, unlike most operators commonly used for 3D curvilinear structure analysis, is discrete, non-linear and non-local...
February 22, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28237440/the-precision-of-micro-tomography-in-bone-taphonomic-experiments-and-the-importance-of-registration
#7
Erwan Le Garff, Vadim Mesli, Yann Delannoy, Thomas Colard, Julien De Jonckheere, Xavier Demondion, Valéry Hédouin
Micro-computed tomography (μCT) provides micrometric 3D images and has been used in forensic studies for anthropology pubis measurement or insect description for post mortem interval estimation. Studies have suggested using registration, a superimposing images method between a reference and a target. This technique avoids positioning bias and increase the precision of μCT. However, no clear study has reported the precision with μCT analysis before or after registration in a forensic field. One fresh post mortem sample of a human cranial vault was collected...
February 15, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28237427/three-dimensional-eye-shape-myopic-maculopathy-and-visual-acuity-the-zhongshan-ophthalmic-center-brien-holden-vision-institute-high-myopia-cohort-study
#8
Xinxing Guo, Ou Xiao, Yanxian Chen, Huawang Wu, Linxing Chen, Ian G Morgan, Mingguang He
PURPOSE: To investigate the relationship among eye shape, myopic maculopathy, and visual acuity in highly myopic eyes using 3-dimensional (3D) magnetic resonance imaging (MRI). DESIGN: Observational case series. PARTICIPANTS: The study included 190 eyes of 95 participants with bilateral high myopia from the Zhongshan Ophthalmic Center-Brien Holden Vision Institute High Myopia Cohort Study, with spherical power ≤-6.00 diopters (D) in both eyes...
February 22, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28236336/cardiac-mr-elastography-for-quantitative-assessment-of-elevated-myocardial-stiffness-in-cardiac-amyloidosis
#9
Arvin Arani, Shivaram P Arunachalam, Ian C Y Chang, Francis Baffour, Phillip J Rossman, Kevin J Glaser, Joshua D Trzasko, Kiaran P McGee, Armando Manduca, Martha Grogan, Angela Dispenzieri, Richard L Ehman, Philip A Araoz
PURPOSE: To evaluate if cardiac magnetic resonance elastography (MRE) can measure increased stiffness in patients with cardiac amyloidosis. Myocardial tissue stiffness plays an important role in cardiac function. A noninvasive quantitative imaging technique capable of measuring myocardial stiffness could aid in disease diagnosis, therapy monitoring, and disease prognostic strategies. We recently developed a high-frequency cardiac MRE technique capable of making noninvasive stiffness measurements...
February 25, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28236314/non-visualization-of-choroid-plexus-of-the-fourth-ventricle-as-a-first-trimester-predictor-of-posterior-fossa-anomalies-and-chromosomal-defects-a-three-dimensional-ultrasound-study
#10
P Martinez-Ten, T Illescas, B Adiego, M Estevez, C Bermejo, A E Wong, W Sepulveda
OBJECTIVE: To assess non-visualization of the choroid plexus of the fourth ventricle (CP-IVV) as a simple, qualitative, and reproducible first-trimester ultrasound feature of the posterior fossa that predicts brain anomalies and chromosomal defects. METHODS: Three-dimensional (3D) ultrasound datasets of the fetal brain were prospectively obtained from 65 consecutive singleton, normal first-trimester fetuses and retrospectively from 27 fetuses identified as having an abnormal fetal posterior fossa on the first-trimester scan, which were randomly included in the final study group...
February 25, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28236117/3d-ultrasound-registration-based-visual-servoing-for-neurosurgical-navigation
#11
Oliver Zettinig, Benjamin Frisch, Salvatore Virga, Marco Esposito, Anna Rienmüller, Bernhard Meyer, Christoph Hennersperger, Yu-Mi Ryang, Nassir Navab
PURPOSE: We present a fully image-based visual servoing framework for neurosurgical navigation and needle guidance. The proposed servo-control scheme allows for compensation of target anatomy movements, maintaining high navigational accuracy over time, and automatic needle guide alignment for accurate manual insertions. METHOD: Our system comprises a motorized 3D ultrasound (US) transducer mounted on a robotic arm and equipped with a needle guide. It continuously registers US sweeps in real time with a pre-interventional plan based on CT or MR images and annotations...
February 24, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28236072/differences-in-limb-alignment-and-femoral-mechanical-anatomical-angles-using-two-dimension-versus-three-dimension-radiographic-imaging
#12
Frédéric Sailhan, Louis Jacob, Moussa Hamadouche
PURPOSE: The purpose of this study was to compare the femoral mechanical-anatomical (FMA) and mechanical femoro-tibial (MFT) angles in an osteoarthritic population using the 2D (two dimension) and the 3D (three dimension) EOS low-dose biplanar radiographic system (EOS). METHODS: FMA and MFT angles were calculated in 127 adults with osteoarthritis. In 2D, FMA angle was measured between the femoral mechanical axis and the femoral anatomical axis, and MFT angle between the femoral mechanical axis and the tibial mechanical axis...
February 24, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28231337/4d-dose-simulation-in-volumetric-arc-therapy-accuracy-and-affecting-parameters
#13
Thilo Sothmann, Tobias Gauer, René Werner
Radiotherapy of lung and liver lesions has changed from normofractioned 3D-CRT to stereotactic treatment in a single or few fractions, often employing volumetric arc therapy (VMAT)-based techniques. Potential unintended interference of respiratory target motion and dynamically changing beam parameters during VMAT dose delivery motivates establishing 4D quality assurance (4D QA) procedures to assess appropriateness of generated VMAT treatment plans when taking into account patient-specific motion characteristics...
2017: PloS One
https://www.readbyqxmd.com/read/28230707/low-cost-3d-printing-orbital-implant-templates-in-secondary-orbital-reconstructions
#14
Alison B Callahan, Ashley A Campbell, Carisa Petris, Michael Kazim
PURPOSE: Despite its increasing use in craniofacial reconstructions, three-dimensional (3D) printing of customized orbital implants has not been widely adopted. Limitations include the cost of 3D printers able to print in a biocompatible material suitable for implantation in the orbit and the breadth of available implant materials. The authors report the technique of low-cost 3D printing of orbital implant templates used in complex, often secondary, orbital reconstructions. METHODS: A retrospective case series of 5 orbital reconstructions utilizing a technique of 3D printed orbital implant templates is presented...
February 22, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28230594/alveolar-molding-effect-in-infants-with-unilateral-cleft-lip-and-palate-comparison-of-two-and-three-dimensional-measurements
#15
Won Hee Lim, Eun Woo Park, Hwa Sung Chae, Soon Man Kwon, Hoi-In Jung, Seung-Hak Baek
The purpose of this study was to compare the results of two- (2D) and three-dimensional (3D) measurements for the alveolar molding effect in patients with unilateral cleft lip and palate. The sample consisted of 23 unilateral cleft lip and palate infants treated with nasoalveolar molding (NAM) appliance. Dental models were fabricated at initial visit (T0; mean age, 23.5 days after birth) and after alveolar molding therapy (T1; mean duration, 83 days). For 3D measurement, virtual models were constructed using a laser scanner and 3D software...
February 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28230527/phloem-unloading-in-arabidopsis-roots-is-convective-and-regulated-by-the-phloem-pole-pericycle
#16
Timothy J Ross-Elliott, Kaare H Jensen, Katrine S Haaning, Brittney Michaelle Wager, Jan Knoblauch, Alexander H Howell, Daniel L Mullendore, Alexander G Monteith, Danae Paultre, Dawei Yan, Sofia Otero-Perez, Matthieu Bourdon, Ross Sager, Jung-Youn Lee, Ykä Helariutta, Michael Knoblauch, Karl John Oparka
In plants, a complex mixture of solutes and macromolecules is transported by the phloem. Here we examined how solutes and macromolecules are separated when they exit the phloem during the unloading process. We used a combination of approaches (non-invasive imaging, 3D-electron microscopy, and mathematical modelling) to show that phloem unloading of solutes in Arabidopsis roots occurs through plasmodesmata by a combination of mass flow and diffusion (convective phloem unloading). During unloading, solutes and proteins are diverted into the phloem-pole pericycle, a tissue connected to the protophloem by a unique class of 'funnel plasmodesmata'...
February 23, 2017: ELife
https://www.readbyqxmd.com/read/28230188/3d-time-lapse-imaging-and-quantification-of-mitochondrial-dynamics
#17
Miguel Sison, Sabyasachi Chakrabortty, Jérôme Extermann, Amir Nahas, Paul James Marchand, Antonio Lopez, Tanja Weil, Theo Lasser
We present a 3D time-lapse imaging method for monitoring mitochondrial dynamics in living HeLa cells based on photothermal optical coherence microscopy and using novel surface functionalization of gold nanoparticles. The biocompatible protein-based biopolymer coating contains multiple functional groups which impart better cellular uptake and mitochondria targeting efficiency. The high stability of the gold nanoparticles allows continuous imaging over an extended time up to 3000 seconds without significant cell damage...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230133/imaging-3d-printed-camera-sees-like-an-eagle
#18
(no author information available yet)
No abstract text is available yet for this article.
February 22, 2017: Nature
https://www.readbyqxmd.com/read/28229509/three-dimensional-ultrasound-imaging-of-the-fetal-skull-and-face
#19
EDITORIAL
Boris Tutschek, Harm-Gerd K Blaas, Jacques Abramowicz, Kazunori Baba, Jing Deng, Wesley Lee, Eberhard Merz, Larry Platt, Dolores Pretorius, Ilan Timor-Tritsch, Liat Gindes
No abstract text is available yet for this article.
February 23, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28228823/recognising-small-image-quality-differences-for-ultrasound-probes-and-the-potential-of-misdiagnosis-due-to-undetected-side-lobes
#20
Georg Doblhoff, Jaroslav Satrapa, Philip Coulthard
BACKGROUND: Ultrasonic imaging is an integral and routine procedure in many medical applications. An increased awareness of the need for quality assurance in this field has led to numerous tests being proposed. Due to the complexity of the problem, the tests directly measuring the important parameters of resolution and contrast of low-echoic structures are not unified, often more qualitative than quantitative, and are performed at large periodic intervals. Uniform sensitivity of an array transducer is a necessary but insufficient requirement for imaging quality of an ultrasound probe...
February 2017: Ultrasound: Journal of the British Medical Ultrasound Society
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