keyword
MENU ▼
Read by QxMD icon Read
search

Imagej

keyword
https://www.readbyqxmd.com/read/28101433/use-of-sonic-tomography-to-detect-and-quantify-wood-decay-in-living-trees
#1
Gregory S Gilbert, Javier O Ballesteros, Cesar A Barrios-Rodriguez, Ernesto F Bonadies, Marjorie L Cedeño-Sánchez, Nohely J Fossatti-Caballero, Mariam M Trejos-Rodríguez, José Moises Pérez-Suñiga, Katharine S Holub-Young, Laura A W Henn, Jennifer B Thompson, Cesar G García-López, Amanda C Romo, Daniel C Johnston, Pablo P Barrick, Fulvia A Jordan, Shiran Hershcovich, Natalie Russo, Juan David Sánchez, Juan Pablo Fábrega, Raleigh Lumpkin, Hunter A McWilliams, Kathleen N Chester, Alana C Burgos, E Beatriz Wong, Jonathan H Diab, Sonia A Renteria, Jennifer T Harrower, Douglas A Hooton, Travis C Glenn, Brant C Faircloth, Stephen P Hubbell
PREMISE OF THE STUDY: Field methodology and image analysis protocols using acoustic tomography were developed and evaluated as a tool to estimate the amount of internal decay and damage of living trees, with special attention to tropical rainforest trees with irregular trunk shapes. METHODS AND RESULTS: Living trunks of a diversity of tree species in tropical rainforests in the Republic of Panama were scanned using an Argus Electronic PiCUS 3 Sonic Tomograph and evaluated for the amount and patterns of internal decay...
December 2016: Applications in Plant Sciences
https://www.readbyqxmd.com/read/28098418/investigation-of-the-variability-of-anterior-chamber-scan-protocol-with-cirrus-high-definition-optical-coherence-tomography
#2
Tin A Tun, Shayne S Tan, Eray Atalay, Sushma Verma, Monisha E Nongpiur, Mani Baskaran, Tin Aung, Rahat Husain
IMPORTANCE: The evaluation of anterior chamber scan (ACS) of Cirrus optical coherence tomography (OCT) for routine clinical use BACKGROUND: To assess the variability of anterior chamber angle (ACA) measurements using the ACS DESIGN: Cross-sectional observational study PARTICIPANTS: Forty subjects aged 40-80 years METHODS: One randomly selected eye from 40 subjects was imaged with Cirrus OCT (model 5000, Carl Zeiss Meditec, Dublin, CA) by two different operators (expert vs non-expert) with a 15-minute interval for inter- and intra-observer variability of image acquisition...
January 18, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28095845/relationship-of-diagnostic-accuracy-of-renal-cortical-echogenicity-with-renal-histopathology-in-dogs-and-cats-a-quantitative-study
#3
Tommaso Banzato, Federico Bonsembiante, Luca Aresu, Alessandro Zotti
BACKGROUND: Renal cortical echogenicity is routinely evaluated during ultrasonographic investigation of the kidneys. Both in dog and cat previous ex-vivo studies have revealed a poor correlation between renal echogenicity and corresponding lesions. The aim of this study was to establish the in-vivo relationship between renal cortical echogenicity and renal histopathology. RESULTS: Thirty-eight dogs and fifteen cats euthanized for critical medical conditions were included in the study...
January 17, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28095484/experimental-diabetes-alters-the-morphology-and-nano-structure-of-the-achilles-tendon
#4
Rodrigo Ribeiro de Oliveira, Rômulo Medina de Mattos, Luciana Magalhães Rebelo, Fernanda Guimarães Meireles Ferreira, Fernanda Tovar-Moll, Luiz Eurico Nasciutti, Gerly Anne de Castro Brito
Although of several studies that associate chronic hyperglycemia with tendinopathy, the connection between morphometric changes as witnessed by magnetic resonance (MR) images, nanostructural changes, and inflammatory markers have not yet been fully established. Therefore, the present study has as a hypothesis that the Achilles tendons of rats with diabetes mellitus (DM) exhibit structural changes. The animals were randomly divided into two experimental groups: Control Group (n = 06) injected with a vehicle (sodium citrate buffer solution) and Diabetic Group (n = 06) consisting of rats submitted to intraperitoneal administration of streptozotocin...
2017: PloS One
https://www.readbyqxmd.com/read/28092394/morphological-evaluation-of-meibomian-glands-in-children-and-adolescents-using-noncontact-infrared-meibography
#5
Yuan Wu, Haili Li, Yun Tang, Xiaoming Yan
PURPOSE: To compare, in vivo, differences in meibomian gland morphology between children and adolescents. METHODS: Sixty-nine patients were included in this study and divided into two groups: children (n = 31; age range: 3 to 11 years) and adolescents (n = 39; age range: 12 to 18 years). Images of meibomian glands were obtained by infrared meibography and analyzed using ImageJ software (developed by the National Institutes of Health; available at http://rsb.info...
January 13, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28090391/neurotoxin-induced-catecholaminergic-loss-in-the-colonic-myenteric-plexus-of-rhesus-monkeys
#6
Jeanette M Shultz, Henry Resnikoff, Viktorya Bondarenko, Valerie Joers, Andres Mejia, Heather Simmons, Marina E Emborg
OBJECTIVE: Constipation is a common non-motor symptom of Parkinson's disease (PD). Although pathology of the enteric nervous system (ENS) has been associated with constipation in PD, the contribution of catecholaminergic neurodegeneration to this symptom is currently debated. The goal of this study was to assess the effects of the neurotoxin 6-hydroxydopamine (6-OHDA) on the colonic myenteric plexus and shed light on the role of catecholaminergic innervation in gastrointestinal (GI) function...
November 2016: Journal of Alzheimer's Disease and Parkinsonism
https://www.readbyqxmd.com/read/28088800/repeatability-and-reproducibility-of-foveal-avascular-zone-area-measurements-using-angioplex-spectral-domain-optical-coherence-tomography-angiography-in-healthy-subjects
#7
Jiaxian Guo, Xiangjun She, Xiaoying Liu, Xiaodong Sun
PURPOSE: The aim of this study was to evaluate the repeatability and reproducibility of foveal avascular zone (FAZ) area measurements using AngioPlex spectral domain optical coherence tomography (OCT) angiography in normal subjects. METHODS: Twenty-two healthy subjects (25 eyes) underwent FAZ area measurements with AngioPlex OCT. Each volunteer was separately examined 3 consecutive times by the 2 experienced observers. The FAZ area was measured using ImageJ software...
January 14, 2017: Ophthalmologica. Journal International D'ophtalmologie
https://www.readbyqxmd.com/read/28068370/visualization-of-radial-peripapillary-capillaries-using-optical-coherence-tomography-angiography-the-effect-of-image-averaging
#8
Shelley Mo, Erika Phillips, Brian D Krawitz, Reena Garg, Sarwat Salim, Lawrence S Geyman, Eleni Efstathiadis, Joseph Carroll, Richard B Rosen, Toco Y P Chui
OBJECTIVES: To assess the effect of image registration and averaging on the visualization and quantification of the radial peripapillary capillary (RPC) network on optical coherence tomography angiography (OCTA). METHODS: Twenty-two healthy controls were imaged with a commercial OCTA system (AngioVue, Optovue, Inc.). Ten 10x10° scans of the optic disc were obtained, and the most superficial layer (50-μm slab extending from the inner limiting membrane) was extracted for analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28068363/quantitative-computed-tomography-features-for-predicting-tumor-recurrence-in-patients-with-surgically-resected-adenocarcinoma-of-the-lung
#9
Hyun Jung Koo, Yu Sub Sung, Woo Hyun Shim, Hai Xu, Chang-Min Choi, Hyeong Ryul Kim, Jung Bok Lee, Mi Young Kim
PURPOSE: The purpose of this study was to determine if preoperative quantitative computed tomography (CT) features including texture and histogram analysis measurements are associated with tumor recurrence in patients with surgically resected adenocarcinoma of the lung. METHODS: The study included 194 patients with surgically resected lung adenocarcinoma who underwent preoperative CT between January 2013 and December 2013. Quantitative CT feature analysis of the lung adenocarcinomas were performed using in-house software based on plug-in package for ImageJ...
2017: PloS One
https://www.readbyqxmd.com/read/28065895/automated-neuron-tracing-using-probability-hypothesis-density-filtering
#10
Miroslav Radojević, Erik Meijering
MOTIVATION: The functionality of neurons and their role in neuronal networks is tightly connected to the cell morphology. A fundamental problem in many neurobiological studies aiming to unravel this connection is the digital reconstruction of neuronal cell morphology from microscopic image data. Many methods have been developed for this, but they are far from perfect, and better methods are needed. RESULTS: Here we present a new method for tracing neuron centerlines needed for full reconstruction...
January 8, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28065314/an-active-contour-imagej-plugin-to-monitor-daughter-cell-size-in-3d-during-cytokinesis
#11
M B Smith, A Chaigne, E K Paluch
Controlling relative daughter cell size is key during cytokinesis. Uncontrolled size asymmetries can lead to aneuploidy and division failure. At the same time, precisely regulated size asymmetries are of crucial importance in many divisions during embryonic development. Therefore, being able to monitor daughter cell size is important in cytokinesis studies. However, freely available tools allowing to effectively measure the size of daughter cells in three dimensions during cytokinesis are missing. Here, we describe an open-access plugin for ImageJ or Fiji based on an active contour surface representation of the cells...
2017: Methods in Cell Biology
https://www.readbyqxmd.com/read/28063018/analysis-of-the-variation-in-low-level-laser-energy-density-on-the-crushed-sciatic-nerves-of-rats-a-morphological-quantitative-and-morphometric-study
#12
Eduardo Keiske Mastuda Ziago, Valéria Paula Sassoli Fazan, Mamie Mizusaki Iyomasa, Luiz Gustavo Sousa, Paula Yumi Yamauchi, Eunice Aparecida da Silva, Eduardo Borie, Ramón Fuentes, Fernando José Dias
The objective of this study was to evaluate three energy densities of low-level laser therapy (LLLT, GaAlAs, 780 nm, 40 mW, 0.04 cm(2)) for the treatment of lesions to peripheral nerves using the sciatic nerve of rats injured via crushing model (15 kgf, 5.2 MPa). Thirty Wistar rats (♂, 200-250 g) were divided into five groups (n = 6): C-control, not injured, and irradiated; L0-injured nerve without irradiation; L4-injured nerve irradiated with LLLT 4 J/cm(2) (0.16 J); L10-injured nerve irradiated with LLLT 10 J/cm(2) (0...
January 7, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28048852/su-f-t-645-to-test-spatial-anddosimetric-accuracy-of-small-cranial-target-irradiation-based-on-1-5-t-mriscans-using-static-arcs-with-mlcdefined-fields
#13
I Brezovich, X Wu, R Popple, S Shen, R Cardan, M Bolding, J Fiveash, J Kraus, S Spencer
PURPOSE: To test spatial and dosimetric accuracy of small cranial target irradiation based on 1.5 T MRI scans using static arcs with MLC-defined fields METHODS: A plastic (PMMA) phantom simulating a small brain lesion was mounted on a GammaKnife headframe equipped with MRI localizer. The lesion was a 3 mm long, 3.175 mm diameter cylindrical cavity filled with MRI contrast. Radiochromic film passing through the cavity was marked with pin pricks at the cavity center. The cavity was contoured on an MRI image and fused with CT to simulate treatment of a lesion not visible on CT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048807/su-g-iep1-02-automated-snr-analysis-of-mr-images-using-model-based-noise-determination
#14
K Krugh
PURPOSE: To develop a robust automated method of signal-to-noise (SNR) analysis from MR images using a single image acquisition approach and model-based noise determination. METHODS: Three consecutive MRI phantom scans were performed according to the SNR test procedures in the 2015 ACR MRI Quality Control Manual. This was repeated for several different RF coils and on MRI scanners from two different vendors. The three images from each RF coil were analyzed by the single-image (SNR-ACR1) and two-image (SNR-ACR2) SNR analysis methods also described in the ACR QC Manual...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048437/su-f-t-580-new-tumor-modeling-using-3d-gel-dosimeter-for-brain-stereoctactic-radiotherpy-srt
#15
K Chang, M Kim, J Kwak, S Kim, Y Ji, B Cho, S Yoon, S Lee
PURPOSE: The purpose of this study is to develop new tumor model using 3D printing with 3D dosimeter for brain stereoctactic radiotherpy (SRT). METHODS: BANG(3) polymer gel was prepared and the gel-filled glass vials were irradiated with a 6 MV photon beam to acquire the calibration curve that present the change of R2 (1/T2 ) value with dose. Graded doses from 0 to 12 Gy with an interval of 2 Gy were delivered. A kit for calibration of gel dosimeter and an 2 tumor model phantoms with a spherical shape were produced using a 3D printer with a polylactic acid after its 3D images were created using Autodesk software...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048273/su-f-i-70-investigation-of-gafchromic-ebt3-film-energy-dependence-using-proton-photon-and-electron-beams
#16
C Ferreira, E Schnell, S Ahmad, T De La Fuente Herman
PURPOSE: To investigate the energy dependence of Gafchromic EBT3 film over a range of clinically used proton, photon and electron energies. METHODS: Proton beam energies of 117 and 204 MeV, corresponding respectively to ranges in water of 10 cm and 27 cm from a Mevion S250 double scatter system unit were used. Electron energies of 6 and 20 MeV and photon energies of 6 and 18 MV from a Varian Clinac 21EX Linac were used. Two pieces of film (5×5 cm(2) ) were irradiated sequentially for doses of 100, 500, and 1000 cGy for all energies and modalities...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048152/su-g-iep4-06-feasibility-of-external-beam-treatment-field-verification-using-cherenkov-imaging
#17
P Black, Y Na, C Wuu
PURPOSE: Cherenkov light emission has been shown to correlate with ionizing radiation (IR) dose delivery in solid tissue. In order to properly correlate Cherenkov light images with real time dose delivery in a patient, we must account for geometric and intensity distortions arising from observation angle, as well as the effect of monitor units (MU) and field size on Cherenkov light emission. To test the feasibility of treatment field verification, we first focused on Cherenkov light emission efficiency based on MU and known field size (FS)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047786/su-f-t-581-the-effect-of-scanning-orientation-on-new-ebt-xd-film-using-vidar-and-epson-scanners
#18
S Chiu-Tsao, M Chan
PURPOSE: To study the effect of film scanning orientation for new EBT-XD film using Vidar and Epson scanners, compared with EBT3 films. METHODS: The EBT-XD (lot#01081501) and EBT3 films (lot#11031501) were cut into 4cm×7cm pieces and each film piece was uniformly exposed to a 6MV photon beam (15×15cm(2) ) at 5 cm depth and 100cm SAD in polystyrene phantom, one at a time. The doses delivered were 0,2.5,5,10,20,30,40 and 50 Gy for EBT-XD films, and 0,0.5,1,2,4,8,12 and 16 Gy for EBT3 films, respectively...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047078/su-f-t-486-a-simple-approach-to-performing-light-versus-radiation-field-coincidence-quality-assurance-using-an-electronic-portal-imaging-device-epid
#19
S Herchko, G Ding
PURPOSE: To develop an accurate, straightforward, and user-independent method for performing light versus radiation field coincidence quality assurance utilizing EPID images, a simple phantom made of readily-accessible materials, and a free software program. METHODS: A simple phantom consisting of a blocking tray, graph paper, and high-density wire was constructed. The phantom was used to accurately set the size of a desired light field and imaged on the electronic portal imaging device (EPID)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046912/su-f-e-04-a-paris-system-based-implant-approach-to-hyperthermia-cancer-tumor-with-gold-seeds-and-ultrasound
#20
C Austerlitz, A Barros, I Gkigkitzis, I Haranas, D Zhu, D Campos
PURPOSE: To apply the Paris system-based implant for an uniform bio-heat distribution from implanted gold rods in tissue insonated with ultrasound. METHODS: Experiments with single-plane implants using parallel equidistant 1.018 ± 0.015 cm height and 0.136 ± 0.001 cm diameter 24-K gold rods) arranged in triangular and square shapes were performed in Mus Musculus white mice (medial dorsal region). The mice were anesthetized and gold rods were implanted by means of a trocar needle and the implanted region was insonated with a 4-cm diameter transducer oscillating with a nominal frequency of 1 MHz and power of about 75 W...
June 2016: Medical Physics
keyword
keyword
22184
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"