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Krishna Agarwal, Radek Macháň, Dilip K Prasad
Localization microscopy and multiple signal classification algorithm use temporal stack of image frames of sparse emissions from fluorophores to provide super-resolution images. Localization microscopy localizes emissions in each image independently and later collates the localizations in all the frames, giving same weight to each frame irrespective of its signal-to-noise ratio. This results in a bias towards frames with low signal-to-noise ratio and causes cluttered background in the super-resolved image. User-defined heuristic computational filters are employed to remove a set of localizations in an attempt to overcome this bias...
March 21, 2018: Scientific Reports
John W Garrett, Yinsheng Li, Ke Li, Guang-Hong Chen
PURPOSE: Digital breast tomosynthesis (DBT) has been shown to somewhat alleviate the breast tissue overlapping issues of two dimensional (2D) mammography.However, the improvement in current DBT systems over mammography is still limited.Statistical image reconstruction (SIR) methods have the potential to reduce through-plane artifacts in DBT, and thus may be used to further reduce anatomical clutter. The purpose of this work was to study the impact of SIR on anatomical clutter in the reconstructed DBT image volumes...
March 15, 2018: Medical Physics
Martin M Müller, Olivier J N Bertrand, Dario Differt, Martin Egelhaaf
Navigation in cluttered environments is an important challenge for animals and robots alike and has been the subject of many studies trying to explain and mimic animal navigational abilities. However, the question of selecting an appropriate home location has, so far, received only little attention. This is surprising, since the choice of a home location might greatly influence an animal's navigation performance. To address the question of home choice in cluttered environments, a systematic analysis of homing trajectories was performed by computer simulations using a skyline-based local homing method...
2018: PloS One
Deep Bera, Shreyas B Raghunathan, Chao Chen, Zhao Chen, Michiel A P Pertijs, Martin D Verweij, Verya Daeichin, Hendrik J Vos, Antonius F W van der Steen, Nico De Jong, Johan Hans G Bosch
Until now, no matrix transducer has been realized for 3D transesophageal echocardiography (TEE) in pediatric patients. In 3D TEE with a matrix transducer, the biggest challenges are to connect a large number of elements to a standard ultrasound system, and to achieve a high volume rate (>200 Hz). To address these issues, we have recently developed a prototype miniaturized matrix transducer for pediatric patients with micro-beamforming and a small central transmitter. In this paper we propose two multiline parallel 3D beamforming techniques (µBF25 and µBF169) using the micro-beamformed datasets from 25 and 169 transmit events to achieve volume rates of 300 Hz and 44 Hz, respectively...
March 6, 2018: Physics in Medicine and Biology
Adrian J Y Chee, Alfred C H Yu
The eigen-based filter has theoretically established itself as a potent solution in ultrasound color flow imaging (CFI) for combating against clutter arising from moving tissues. Yet, it remains poorly understood on how much gain in flow detection sensitivity and specificity can be delivered by this adaptive clutter filter. Here, we investigated the receiver operating characteristic (ROC) of the eigen-based clutter filter to statistically evaluate its efficacy. Our investigation was conducted using a new vascular phantom testbed that incorporated both intrinsic tissue motion (vessel pulsation: 7...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Arun Asokan Nair, Trac Duy Tran, Muyinatu A Lediju Bell
Short-lag spatial coherence (SLSC) imaging displays the spatial coherence between backscattered ultrasound echoes instead of their signal amplitudes and is more robust to noise and clutter artifacts when compared with traditional delay-and-sum (DAS) B-mode imaging. However, SLSC imaging does not consider the content of images formed with different lags, and thus does not exploit the differences in tissue texture at each short-lag value. Our proposed method improves SLSC imaging by weighting the addition of lag values (i...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Margaret Allard, Joshua Shubert, Muyinatu A Lediju Bell
Hysterectomies (i.e., surgical removal of the uterus) are the prevailing solution to treat medical conditions such as uterine cancer, endometriosis, and uterine prolapse. One complication of hysterectomies is accidental injury to the ureters located within millimeters of the uterine arteries that are severed and cauterized to hinder blood flow and enable full uterus removal. This work explores the feasibility of using photoacoustic imaging to visualize the uterine arteries (and potentially the ureter) when this imaging method is uniquely combined with a da Vinci® surgical robot that enables teleoperated hysterectomies...
April 2018: Journal of Medical Imaging
E Kerzner, A Lex, C L Sigulinsky, T Umess, B W Jones, R E Marc, M Meyer
Multivariate graphs are prolific across many fields, including transportation and neuroscience. A key task in graph analysis is the exploration of connectivity, to, for example, analyze how signals flow through neurons, or to explore how well different cities are connected by flights. While standard node-link diagrams are helpful in judging connectivity, they do not scale to large networks. Adjacency matrices also do not scale to large networks and are only suitable to judge connectivity of adjacent nodes. A key approach to realize scalable graph visualization are queries: instead of displaying the whole network, only a relevant subset is shown...
June 2017: Computer Graphics Forum: Journal of the European Association for Computer Graphics
Carl Pankok, David Kaber
Display clutter can have differential effects based on environmental factors, such as workload, stress, and experiment paradigm. The objectives of the current study were to assess the effects of display clutter on driver performance and attention allocation and compare results across two experimental paradigms. Forty-two participants searched high- and low-clutter in-car navigation displays for routine information either during a static, presentation-based experiment or in a dynamic, driving simulator experiment...
May 2018: Applied Ergonomics
Juan Sandino, Felipe Gonzalez, Kerrie Mengersen, Kevin J Gaston
The monitoring of invasive grasses and vegetation in remote areas is challenging, costly, and on the ground sometimes dangerous. Satellite and manned aircraft surveys can assist but their use may be limited due to the ground sampling resolution or cloud cover. Straightforward and accurate surveillance methods are needed to quantify rates of grass invasion, offer appropriate vegetation tracking reports, and apply optimal control methods. This paper presents a pipeline process to detect and generate a pixel-wise segmentation of invasive grasses, using buffel grass (Cenchrus ciliaris) and spinifex (Triodia sp...
February 16, 2018: Sensors
Consuela-Mădălina Gheorghe, Iuliana-Raluca Gheorghe, Victor Lorin Purcărea
Nowadays, we live in a world in which we are daily bombed by hundreds of advertisements. Specialists have to discover other channels or embed attractive elements in the advertisements' messages to cut through the clutter and catch the consumers' attention. The evolution of the concept of service has changed from the commercial status to determining a lifestyle. Buying a service has led to a change in the consumer behavior. Consumers want to buy services that dazzle their senses, touch their hearts, and stimulate their minds, not as before, excellent or satisfying...
July 2017: Romanian Journal of Ophthalmology
Devin C Odom, Ann M Gronowski, Elizabeth Odom, William Clutter, Mark Thoelke
BACKGROUND: Cosyntropin stimulation testing (CST) is used to screen patients for adrenal insufficiency (AI). Traditionally, CST includes baseline cortisol concentration, the administration of cosyntropin, and cortisol concentration at 30 and 60 minutes poststimulation. There is debate surrounding the utility of testing and cut-off points for concentrations at each time point. OBJECTIVE: To determine if a single cortisol measurement at 30 or 60 minutes could replace the traditional approach...
February 7, 2018: Journal of Hospital Medicine: An Official Publication of the Society of Hospital Medicine
Yuan Jiang, Yang Li, Jinjian Cai, Yanhua Wang, Jia Xu
High resolution range profile (HRRP) plays an important role in wideband radar automatic target recognition (ATR). In order to alleviate the sensitivity to clutter and target aspect, employing a sequence of HRRP is a promising approach to enhance the ATR performance. In this paper, a novel HRRP sequence-matching method based on singular value decomposition (SVD) is proposed. First, the HRRP sequence is decoupled into the angle space and the range space via SVD, which correspond to the span of the left and the right singular vectors, respectively...
February 14, 2018: Sensors
Hao Shi, Qingjun Zhang, Mingming Bian, Hangyu Wang, Zhiru Wang, Liang Chen, Jian Yang
With the rapid development of remote sensing technologies, SAR satellites like China's Gaofen-3 satellite have more imaging modes and higher resolution. With the availability of high-resolution SAR images, automatic ship target detection has become an important topic in maritime research. In this paper, a novel ship detection method based on gradient and integral features is proposed. This method is mainly composed of three steps. First, in the preprocessing step, a filter is employed to smooth the clutters and the smoothing effect can be adaptive adjusted according to the statistics information of the sub-window...
February 12, 2018: Sensors
Yigeng Ma, Hong Hong, Xiaohua Zhu
Clutters caused by multipath have been widely researched in through-the-wall radar imaging (TWRI). The existing research work of multipath only consider reflections from the wall, while in the condition of a small scene, with the increasing number of targets, multipath from targets to targets, named interaction multipath, usually generates ghosts, which degrades the performance of TWRI. In order to mitigate the effect of interaction multipath, considering fast data acquisition and measurement reduction, we made use of the propagation characteristic of interaction multipath to build the sparse model of the target scene and developed a compressive sensing (CS)-based method, which is referred to as 'interaction CS'...
February 11, 2018: Sensors
T Aaltonen, V M Abazov, B Abbott, B S Acharya, M Adams, T Adams, J P Agnew, G D Alexeev, G Alkhazov, A Alton, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, J A Appel, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, A Askew, S Atkins, B Auerbach, K Augsten, A Aurisano, V Aushev, Y Aushev, C Avila, F Azfar, F Badaud, W Badgett, T Bae, L Bagby, B Baldin, D V Bandurin, S Banerjee, A Barbaro-Galtieri, E Barberis, P Baringer, V E Barnes, B A Barnett, P Barria, J F Bartlett, P Bartos, U Bassler, M Bauce, V Bazterra, A Bean, F Bedeschi, M Begalli, S Behari, L Bellantoni, G Bellettini, J Bellinger, D Benjamin, A Beretvas, S B Beri, G Bernardi, R Bernhard, I Bertram, M Besançon, R Beuselinck, P C Bhat, S Bhatia, V Bhatnagar, A Bhatti, K R Bland, G Blazey, S Blessing, K Bloom, B Blumenfeld, A Bocci, A Bodek, A Boehnlein, D Boline, E E Boos, G Borissov, D Bortoletto, M Borysova, J Boudreau, A Boveia, A Brandt, O Brandt, L Brigliadori, M Brochmann, R Brock, C Bromberg, A Bross, D Brown, E Brucken, X B Bu, J Budagov, H S Budd, M Buehler, V Buescher, V Bunichev, S Burdin, K Burkett, G Busetto, P Bussey, C P Buszello, P Butti, A Buzatu, A Calamba, E Camacho-Pérez, S Camarda, M Campanelli, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, B Casal, M Casarsa, B C K Casey, H Castilla-Valdez, A Castro, P Catastini, S Caughron, D Cauz, V Cavaliere, A Cerri, L Cerrito, S Chakrabarti, K M Chan, A Chandra, A Chapelain, E Chapon, G Chen, Y C Chen, M Chertok, G Chiarelli, G Chlachidze, K Cho, S W Cho, S Choi, D Chokheli, B Choudhary, S Cihangir, D Claes, A Clark, C Clarke, J Clutter, M E Convery, J Conway, M Cooke, W E Cooper, M Corbo, M Corcoran, M Cordelli, F Couderc, M-C Cousinou, C A Cox, D J Cox, M Cremonesi, D Cruz, J Cuevas, R Culbertson, J Cuth, D Cutts, A Das, N d'Ascenzo, M Datta, G Davies, P de Barbaro, S J de Jong, E De La Cruz-Burelo, F Déliot, R Demina, L Demortier, M Deninno, D Denisov, S P Denisov, M D'Errico, S Desai, C Deterre, K DeVaughan, F Devoto, A Di Canto, B Di Ruzza, H T Diehl, M Diesburg, P F Ding, J R Dittmann, A Dominguez, S Donati, M D'Onofrio, M Dorigo, A Driutti, A Drutskoy, A Dubey, L V Dudko, A Duperrin, S Dutt, M Eads, K Ebina, R Edgar, D Edmunds, A Elagin, J Ellison, V D Elvira, Y Enari, R Erbacher, S Errede, B Esham, H Evans, A Evdokimov, V N Evdokimov, S Farrington, A Fauré, L Feng, T Ferbel, J P Fernández Ramos, F Fiedler, R Field, F Filthaut, W Fisher, H E Fisk, G Flanagan, R Forrest, M Fortner, H Fox, J Franc, M Franklin, J C Freeman, H Frisch, S Fuess, Y Funakoshi, C Galloni, P H Garbincius, A Garcia-Bellido, J A García-González, A F Garfinkel, P Garosi, V Gavrilov, W Geng, C E Gerber, H Gerberich, E Gerchtein, Y Gershtein, S Giagu, V Giakoumopoulou, K Gibson, C M Ginsburg, G Ginther, N Giokaris, P Giromini, V Glagolev, D Glenzinski, O Gogota, M Gold, D Goldin, A Golossanov, G Golovanov, G Gomez, G Gomez-Ceballos, M Goncharov, O González López, I Gorelov, A T Goshaw, K Goulianos, E Gramellini, P D Grannis, S Greder, H Greenlee, G Grenier, Ph Gris, J-F Grivaz, A Grohsjean, C Grosso-Pilcher, S Grünendahl, M W Grünewald, T Guillemin, J Guimaraes da Costa, G Gutierrez, P Gutierrez, S R Hahn, J Haley, J Y Han, L Han, F Happacher, K Hara, K Harder, M Hare, A Harel, R F Harr, T Harrington-Taber, K Hatakeyama, J M Hauptman, C Hays, J Hays, T Head, T Hebbeker, D Hedin, H Hegab, J Heinrich, A P Heinson, U Heintz, C Hensel, I Heredia-De La Cruz, M Herndon, K Herner, G Hesketh, M D Hildreth, R Hirosky, T Hoang, J D Hobbs, A Hocker, B Hoeneisen, J Hogan, M Hohlfeld, J L Holzbauer, Z Hong, W Hopkins, S Hou, I Howley, Z Hubacek, R E Hughes, U Husemann, M Hussein, J Huston, V Hynek, I Iashvili, Y Ilchenko, R Illingworth, G Introzzi, M Iori, A S Ito, A Ivanov, S Jabeen, M Jaffré, E James, D Jang, A Jayasinghe, B Jayatilaka, E J Jeon, M S Jeong, R Jesik, P Jiang, S Jindariani, K Johns, E Johnson, M Johnson, A Jonckheere, M Jones, P Jonsson, K K Joo, J Joshi, S Y Jun, A W Jung, T R Junk, A Juste, E Kajfasz, M Kambeitz, T Kamon, P E Karchin, D Karmanov, A Kasmi, Y Kato, I Katsanos, M Kaur, R Kehoe, S Kermiche, W Ketchum, J Keung, N Khalatyan, A Khanov, A Kharchilava, Y N Kharzheev, B Kilminster, D H Kim, H S Kim, J E Kim, M J Kim, S H Kim, S B Kim, Y J Kim, Y K Kim, N Kimura, M Kirby, I Kiselevich, J M Kohli, K Kondo, D J Kong, J Konigsberg, A V Kotwal, A V Kozelov, J Kraus, M Kreps, J Kroll, M Kruse, T Kuhr, A Kumar, A Kupco, M Kurata, T Kurča, V A Kuzmin, A T Laasanen, S Lammel, S Lammers, M Lancaster, K Lannon, G Latino, P Lebrun, H S Lee, H S Lee, J S Lee, S W Lee, W M Lee, X Lei, J Lellouch, S Leo, S Leone, J D Lewis, D Li, H Li, L Li, Q Z Li, J K Lim, A Limosani, D Lincoln, J Linnemann, V V Lipaev, E Lipeles, R Lipton, A Lister, H Liu, Q Liu, T Liu, Y Liu, A Lobodenko, S Lockwitz, A Loginov, M Lokajicek, R Lopes de Sa, D Lucchesi, A Lucà, J Lueck, P Lujan, P Lukens, R Luna-Garcia, G Lungu, A L Lyon, J Lys, R Lysak, A K A Maciel, R Madar, R Madrak, P Maestro, R Magaña-Villalba, S Malik, S Malik, V L Malyshev, G Manca, A Manousakis-Katsikakis, J Mansour, L Marchese, F Margaroli, P Marino, J Martínez-Ortega, K Matera, M E Mattson, A Mazzacane, P Mazzanti, R McCarthy, C L McGivern, R McNulty, A Mehta, P Mehtala, M M Meijer, A Melnitchouk, D Menezes, P G Mercadante, M Merkin, C Mesropian, A Meyer, J Meyer, T Miao, F Miconi, D Mietlicki, A Mitra, H Miyake, S Moed, N Moggi, N K Mondal, C S Moon, R Moore, M J Morello, A Mukherjee, M Mulhearn, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, E Nagy, I Nakano, A Napier, M Narain, R Nayyar, H A Neal, J P Negret, J Nett, P Neustroev, H T Nguyen, T Nigmanov, L Nodulman, S Y Noh, O Norniella, T Nunnemann, L Oakes, S H Oh, Y D Oh, T Okusawa, R Orava, J Orduna, L Ortolan, N Osman, C Pagliarone, A Pal, E Palencia, P Palni, V Papadimitriou, N Parashar, V Parihar, S K Park, W Parker, R Partridge, N Parua, A Patwa, G Pauletta, M Paulini, C Paus, B Penning, M Perfilov, Y Peters, K Petridis, G Petrillo, P Pétroff, T J Phillips, G Piacentino, E Pianori, J Pilot, K Pitts, C Plager, M-A Pleier, V M Podstavkov, L Pondrom, A V Popov, S Poprocki, K Potamianos, A Pranko, M Prewitt, D Price, N Prokopenko, F Prokoshin, F Ptohos, G Punzi, J Qian, A Quadt, B Quinn, P N Ratoff, I Razumov, I Redondo Fernández, P Renton, M Rescigno, F Rimondi, I Ripp-Baudot, L Ristori, F Rizatdinova, A Robson, T Rodriguez, S Rolli, M Rominsky, M Ronzani, R Roser, J L Rosner, A Ross, C Royon, P Rubinov, R Ruchti, F Ruffini, A Ruiz, J Russ, V Rusu, G Sajot, W K Sakumoto, Y Sakurai, A Sánchez-Hernández, M P Sanders, L Santi, A S Santos, K Sato, G Savage, V Saveliev, M Savitskyi, A Savoy-Navarro, L Sawyer, T Scanlon, R D Schamberger, Y Scheglov, H Schellman, P Schlabach, E E Schmidt, M Schott, C Schwanenberger, T Schwarz, R Schwienhorst, L Scodellaro, F Scuri, S Seidel, Y Seiya, J Sekaric, A Semenov, H Severini, F Sforza, E Shabalina, S Z Shalhout, V Shary, S Shaw, A A Shchukin, T Shears, P F Shepard, M Shimojima, O Shkola, M Shochet, I Shreyber-Tecker, V Simak, A Simonenko, P Skubic, P Slattery, K Sliwa, J R Smith, F D Snider, G R Snow, J Snow, S Snyder, S Söldner-Rembold, H Song, L Sonnenschein, V Sorin, K Soustruznik, R St Denis, M Stancari, J Stark, N Stefaniuk, D Stentz, D A Stoyanova, M Strauss, J Strologas, Y Sudo, A Sukhanov, I Suslov, L Suter, P Svoisky, K Takemasa, Y Takeuchi, J Tang, M Tecchio, P K Teng, J Thom, E Thomson, V Thukral, M Titov, D Toback, S Tokar, V V Tokmenin, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, Y-T Tsai, D Tsybychev, B Tuchming, C Tully, F Ukegawa, S Uozumi, L Uvarov, S Uvarov, S Uzunyan, R Van Kooten, W M van Leeuwen, N Varelas, E W Varnes, I A Vasilyev, F Vázquez, G Velev, C Vellidis, A Y Verkheev, C Vernieri, L S Vertogradov, M Verzocchi, M Vesterinen, M Vidal, D Vilanova, R Vilar, J Vizán, M Vogel, P Vokac, G Volpi, P Wagner, H D Wahl, R Wallny, M H L S Wang, S M Wang, J Warchol, D Waters, G Watts, M Wayne, J Weichert, L Welty-Rieger, W C Wester, D Whiteson, A B Wicklund, S Wilbur, H H Williams, M R J Williams, G W Wilson, J S Wilson, P Wilson, B L Winer, P Wittich, M Wobisch, S Wolbers, H Wolfmeister, D R Wood, T Wright, X Wu, Z Wu, T R Wyatt, Y Xie, R Yamada, K Yamamoto, D Yamato, S Yang, T Yang, U K Yang, Y C Yang, W-M Yao, T Yasuda, Y A Yatsunenko, W Ye, Z Ye, G P Yeh, K Yi, H Yin, K Yip, J Yoh, K Yorita, T Yoshida, S W Youn, G B Yu, I Yu, J M Yu, A M Zanetti, Y Zeng, J Zennamo, T G Zhao, B Zhou, C Zhou, J Zhu, M Zielinski, D Zieminska, L Zivkovic, S Zucchelli
The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of sqrt[s]=1.96  TeV. We report the results of combinations of the inclusive asymmetries and their differential dependencies on relevant kinematic quantities. The combined inclusive asymmetry is A_{FB}^{tt[over ¯]}=0...
January 26, 2018: Physical Review Letters
Deng Zhang, Junchang Zhang, Chenyang Xia
In recent years, video target tracking algorithms have been widely used. However, many tracking algorithms do not achieve satisfactory performance, especially when dealing with problems such as object occlusions, background clutters, motion blur, low illumination color images, and sudden illumination changes in real scenes. In this paper, we incorporate an object model based on contour information into a Staple tracker that combines the correlation filter model and color model to greatly improve the tracking robustness...
February 9, 2018: Sensors
Zaem Arif Zainal, Shunji Satoh
The mathematical relation between a vector electric field and its corresponding scalar potential field is useful to formulate computational problems of lower/middle-order visual processing, specifically related to the assignment of borders to the side of the object: so-called border ownership (BO). BO coding is a key process for extracting the objects from the background, allowing one to organize a cluttered scene. We propose that the problem is solvable simultaneously by application of a theorem of electromagnetism, i...
January 10, 2018: Neural Networks: the Official Journal of the International Neural Network Society
Mauro Manassi, David Whitney
In everyday life, we are constantly surrounded by complex and cluttered scenes. In such cluttered environments, visual perception is primarily limited by crowding, the deleterious influence of nearby objects on object recognition. For the past several decades, visual crowding was assumed to occur at a single stage, only between low-level features or object parts, thus dismantling, destroying, or filtering object information. A large and converging body of evidence has demonstrated that this assumption is false: crowding occurs at multiple stages of visual analysis, and information passes through crowding at each of these stages...
February 5, 2018: Current Biology: CB
Sharissa H A Corporaal, Sjoerd M Bruijn, Wouter Hoogkamer, Sima Chalavi, Matthieu P Boisgontier, Jacques Duysens, Stephan P Swinnen, Jolien Gooijers
Humans can navigate through challenging environments (e.g., cluttered or uneven terrains) by modifying their preferred gait pattern (e.g., step length, step width, or speed). Growing behavioral and neuroimaging evidence suggests that the ability to modify preferred step patterns requires the recruitment of cognitive resources. In children, it is argued that prolonged development of complex gait is related to the ongoing development of involved brain regions, but this has not been directly investigated yet. Here, we aimed to elucidate the relationship between structural brain properties and complex gait in youth aged 9-18 years...
January 24, 2018: Brain Structure & Function
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