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https://www.readbyqxmd.com/read/28930790/photography-in-dermatologic-surgery-selection-of-an-appropriate-lighting-solution-for-a-particular-clinical-application
#1
Brian R Chen, Emily Poon, Murad Alam
BACKGROUND: Lighting is an important component of consistent, high-quality dermatologic photography. There are different types of lighting solutions available. OBJECTIVE: To evaluate currently available lighting equipment and methods suitable for procedural dermatology. MATERIALS AND METHODS: Overhead lighting, built-in camera flashes, external flash units, studio strobes, and light-emitting diode (LED) light panels were evaluated with regard to their utility for dermatologic surgeons...
September 19, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28929257/initial-experience-with-a-dual-console-robotic-assisted-platform-for-training-in-colorectal-surgery
#2
J C Bolger, M P Broe, M A Zarog, A Looney, K McKevitt, D Walsh, S Giri, C Peirce, J C Coffey
BACKGROUND: Minimally invasive surgery is associated with several patient-related benefits, including reduced length of hospital stay and reduced blood loss. Robotic-assisted surgery offers many advantages when compared with standard laparoscopic procedures, including a stable three-dimensional binocular camera platform, motion smoothing and motion scaling, improved dexterity and ergonomics. There are limited data on the effectiveness of the dual-console DaVinci Xi platform for teaching resident surgeons...
September 19, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28928768/the-effectiveness-of-personalized-bowel-preparation-using-a-smartphone-camera-application-a-randomized-pilot-study
#3
Jae Won Jung, Jongha Park, Gi Jung Jeon, Young Soo Moon, Sung Yuon Yang, Tae Oh Kim, Eui Tay Jung, Hee-Cheol Kim
BACKGROUND: We aimed to investigate the effectiveness of a smartphone application that analyzes and judges the optimal dosage of polyethylene glycol (PEG) for bowel preparation. METHODS: Patients were assigned to use the smartphone camera application (app group) or written instructions (non-app group). The smartphone camera application was programmed to analyze the bowel preparation quality and automatically determine the dosage of PEG from an analysis of stool images...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28927995/measuring-system-for-an-attitude-angle-of-a-denture-using-an-inertial-measurement-unit
#4
Toshiaki Sekita, Syuhei Takeuchi, Syunsuke Minakuchi
PURPOSE: The aim of this study was to assemble and verify a measuring system for 3-D movements (attitude angle) of the denture during function. METHODS: For the calibration test, the sensor was fixed at the center of the rotary table. Operation and stopping of the rotary table were repeated 8 times, and the direction of rotation was reversed in the middle. The amount of rotation was 1.2 and 2.4°. As a pilot clinical trial, the attitude angles of three upper complete dentures during tapping were measured by this system...
September 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28926581/imaging-grafted-cells-with-18f-fhbg-using-an-optimized-hsv1-tk-mammalian-expression-vector-in-a-brain-injury-rodent-model
#5
Anne-Sophie Salabert, Laurence Vaysse, Marie Beaurain, Mathieu Alonso, Germain Arribarat, Jean-Albert Lotterie, Isabelle Loubinoux, Mathieu Tafani, Pierre Payoux
INTRODUCTION: Cell transplantation is an innovative therapeutic approach after brain injury to compensate for tissue damage. To have real-time longitudinal monitoring of intracerebrally grafted cells, we explored the feasibility of a molecular imaging approach using thymidine kinase HSV1-TK gene encoding and [18F]FHBG as a reporter probe to image enzyme expression. METHODS: A stable neuronal cell line expressing HSV1-TK was developed with an optimised mammalian expression vector to ensure long-term transgene expression...
2017: PloS One
https://www.readbyqxmd.com/read/28923128/-items-for-criticism-not-in-sequence-joseph-delee-pare-lorentz-and-the-fight-for-life-1940
#6
Caitjan Gainty
In the late 1920s, the American obstetrician Joseph DeLee brought the motion-picture camera into the birth room. Following that era's trend of adapting industrial efficiency practices for medical environments, DeLee's films give spectacular and unexpected expression to the engineering concept of 'streamlining'. Accomplishing what more tangible obstetric streamlining practices had failed to, DeLee's cameras, and his post-production manipulation, shifted birth from messy and dangerous to rationalized, efficient, death-defying...
September 2017: British Journal for the History of Science
https://www.readbyqxmd.com/read/28922696/does-air-gas-aesthesiometry-generate-a-true-mechanical-stimulus-for-corneal-sensitivity-measurement
#7
Daniela S Nosch, Heiko Pult, Julie Albon, Christine Purslow, Paul J Murphy
BACKGROUND: Belmonte Ocular Pain Meter (OPM) air jet aesthesiometry overcomes some of the limitations of the Cochet-Bonnet aesthesiometer. However, for true mechanical corneal sensitivity measurement, the airflow stimulus temperature of the aesthesiometer must equal ocular surface temperature (OST), to avoid additional response from temperature-sensitive nerves. The aim of this study was to determine: (A) the stimulus temperature inducing no or least change in OST; and (B) to evaluate if OST remains unchanged with different stimulus durations and airflow rates...
September 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28922601/substrate-dependence-of-the-freezing-dynamics-of-supercooled-water-films-a-high-speed-optical-microscope-study
#8
Elzbieta Pach, Laura Rodríguez, Albert Verdaguer
The freezing of supercooled water films on silicon-based surfaces was investigated using a high-speed camera coupled to an optical microscope. We were able to study in detail the two phases or stages in during water freezing; the first stage, faster, when dendritic grow occurs co-planar with the cold surface of the substrate and the second stage, slower, when the ice formed on the surface grows vertically until all the film is frozen. Several differentiated processes were identified during the freezing: two dimensional dendrite growing on the substrate interface, vertical dendrite growing, formation and evolution of ice domains, trapping of air bubbles in ice and freezing of the water film surface...
September 18, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28919703/quality-and-learning-curve-of-handheld-versus-stand-alone-non-mydriatic-cameras
#9
Mariya Gosheva, Christian Klameth, Lars Norrenberg, Lucien Clin, Johannes Dietter, Wadood Haq, Iliya V Ivanov, Focke Ziemssen, Martin A Leitritz
PURPOSE: Nowadays, complex digital imaging systems allow detailed retinal imaging without dilating patients' pupils. These so-called non-mydriatic cameras have advantages in common circumstances (eg, for screening or emergency purposes) but present limitations in terms of image quality and field of view. We compare the usefulness of two non-mydriatic camera systems (ie, a handheld versus a stand-alone device) for fundus imaging. The primary outcome was image quality. The secondary outcomes were learning effects and quality grade-influencing factors...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28919165/validation-of-the-vectra-h1-portable-three-dimensional-photogrammetry-system-for-facial-imaging
#10
L Camison, M Bykowski, W W Lee, J C Carlson, J Roosenboom, J A Goldstein, J E Losee, S M Weinberg
Three-dimensional (3D) surface imaging using stereophotogrammetry has become increasingly popular in clinical settings, offering advantages for surgical planning and outcome evaluation. The handheld Vectra H1 is a low-cost, highly portable system that offers several advantages over larger stationary cameras, but independent technical validation is currently lacking. In this study, 3D facial images of 26 adult participants were captured with the Vectra H1 system and the previously validated 3dMDface system. Using error magnitude statistics, 136 linear distances were compared between cameras...
September 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28919031/a-pilot-study-to-assess-near-infrared-laparoscopy-with-indocyanine-green-icg-for-intraoperative-sentinel-lymph-node-mapping-in-early-colon-cancer
#11
A C Currie, A Brigic, S Thomas-Gibson, N Suzuki, M Moorghen, J T Jenkins, O D Faiz, R H Kennedy
BACKGROUND: Previous attempts at sentinel lymph node (SLN) mapping in colon cancer have been compromised by ineffective tracers and the inclusion of advanced disease. This study evaluated the feasibility of fluorescence detection of SLNs with indocyanine green (ICG) for lymphatic mapping in T1/T2 clinically staged colonic malignancy. METHODS: Consecutive patients with clinical T1/T2 stage colon cancer underwent endoscopic peritumoral submucosal injection of indocyanine green (ICG) for fluorescence detection of SLN using a near-infrared (NIR) camera...
August 23, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28918007/the-effect-of-visual-spatial-ability-on-the-learning-of-robot-assisted-surgical-skills
#12
Takashige Abe, Nicholas Raison, Nobuo Shinohara, M Shamim Khan, Kamran Ahmed, Prokar Dasgupta
BACKGROUND: The aim of this study was to determine the correlation of visual-spatial ability with progression along the learning curve for robotic surgical skills training. METHODS: A total of 21 novice participants were recruited. All participants completed a training program consisting of 5 training sessions of 30 minutes of virtual reality (VR) simulation and 30 minutes of dry laboratory training. The VR simulation part was the subject of the present study. During VR simulation training, participants performed the basic skill exercises of Camera Targeting 1, Pick and Place, and Peg Board 1 followed by advanced skill exercises of Suture Sponge 1 and Thread the Rings...
September 13, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28916622/quantification-and-determination-of-normal-123-i-meta-iodobenzylguanidine-heart-to-mediastinum-ratio-hmr-from-cardiac-spect-ct-and-correlation-with-planar-hmr
#13
Raza Alvi, Edward J Miller, Taraneh Hashemi Zonouz, Veronica Sandoval, Noor Tariq, Rachel Lampert, Albert J Sinusas, Yi-Hwa Liu
Assessment of cardiac (123)I-mIBG uptake relies on the heart-to-mediastinal ratio (HMR) derived from planar images. We have developed novel semi-automated quantitative methodologies for assessing HMR from single photon emission computed tomography (SPECT) images using a dedicated cardiac multi-pinhole SPECT/computerized tomography (CT) system and determined the lower limit of normal (LLN) SPECT-derived HMR and the correlation to planar-derived HMR. Methods: Twenty-one healthy volunteers were injected with (123)I-meta Iodobenzylguanidine ((123)I-mIBG) and imaged using two different cameras...
September 15, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28915501/is-there-an-observational-effect-an-exploratory-study-into-speed-cameras-and-self-reported-offending-behaviour
#14
J Freeman, S-A Kaye, V Truelove, J Davey
Fixed and mobile speed cameras are an important element of enforcement initiatives designed to create a strong deterrent effect and improve road safety. Despite the widespread use of the technology and the need to create a strong deterrent effect, research has yet to determine if there is a relationship between levels of exposure to the devices and subsequent self-reported deterrent effects. As a result, licensed motorists (N=536; 51% female) in Queensland (Australia) were recruited to complete a questionnaire that measured exposure to speed cameras and associated offending behaviours...
September 12, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28913715/oxidized-low-density-lipoprotein-oxldl-affects-load-free-cell-shortening-of-cardiomyocytes-in-a-proprotein-convertase-subtilisin-kexin-9-pcsk9-dependent-way
#15
Klaus-Dieter Schlüter, Annemarie Wolf, Martin Weber, Rolf Schreckenberg, Rainer Schulz
Recent studies have documented that oxidized low-density lipoprotein cholesterol (oxLDL) levels directly impact myocardial structure and function. However, the molecular mechanisms by which oxLDL affects cardiac myocytes are not well established. We addressed the question whether oxLDL modifies load-free cell shortening, a standardized readout of cardiac cellular function, and investigated whether proprotein convertase subtilisin/kexin-9 (PCSK9) is involved on oxLDL-dependent processes. Adult rat ventricular cardiomyocytes were isolated and incubated for 24 h with oxLDL...
September 14, 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28912565/real-time-image-processing-for-microscopy-based-label-free-imaging-flow-cytometry-in-a-microfluidic-chip
#16
Young Jin Heo, Donghyeon Lee, Junsu Kang, Keondo Lee, Wan Kyun Chung
Imaging flow cytometry (IFC) is an emerging technology that acquires single-cell images at high-throughput for analysis of a cell population. Rich information that comes from high sensitivity and spatial resolution of a single-cell microscopic image is beneficial for single-cell analysis in various biological applications. In this paper, we present a fast image-processing pipeline (R-MOD: Real-time Moving Object Detector) based on deep learning for high-throughput microscopy-based label-free IFC in a microfluidic chip...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912515/screening-for-vision-threatening-diabetic-retinopathy-in-south-india-comparing-portable-non-mydriatic-and-standard-fundus-cameras-and-clinical-exam
#17
S Sengupta, M D Sindal, C G Besirli, S Upadhyaya, R Venkatesh, L M Niziol, A L Robin, M A Woodward, P A Newman-Casey
PurposeTo evaluate the sensitivity and specificity of a portable non-mydriatic fundus camera to diagnose vision-threatening diabetic retinopathy (VTDR).Patients and methodsA prospective, single-site, comparative instrument validation study was undertaken at the Aravind Eye Care System. Overall, 155 subjects with and without diabetes were recruited. Images from 275 eyes were obtained with the (1) non-mydriatic Smartscope, (2) mydriatic Smartscope, and (3) mydriatic table-top camera of the macular, nasal, and superotemporal fields...
September 15, 2017: Eye
https://www.readbyqxmd.com/read/28912489/incoherent-digital-holograms-acquired-by-interferenceless-coded-aperture-correlation-holography-system-without-refractive-lenses
#18
Manoj Kumar, A Vijayakumar, Joseph Rosen
We present a lensless, interferenceless incoherent digital holography technique based on the principle of coded aperture correlation holography. The acquired digital hologram by this technique contains a three-dimensional image of some observed scene. Light diffracted by a point object (pinhole) is modulated using a random-like coded phase mask (CPM) and the intensity pattern is recorded and composed as a point spread hologram (PSH). A library of PSHs is created using the same CPM by moving the pinhole to all possible axial locations...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912146/cerenkov-activated-sticky-tag-for-in-vivo-fluorescence-imaging
#19
Sudeep Das, Katja Haedicke, Jan Grimm
A big challenge for the clinical utilization of Cerenkov luminescence (CL) imaging is its low signal intensity, which is several orders of magnitude below ambient light. Consequently, highly sensitive cameras, sufficient shielding from background light and long acquisition times are required. To alleviate this problem, we hypothesize a strategy to convert the weak CL signal into a stronger fluorescence signal by using CL-activated formation of nitrenes from azides to locally fix a fluorescent probe in tissue by the formation of a covalent bond...
September 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28911828/laparoscopic-sentinel-lymph-node-mapping-with-indocyanine-green-icg-using-ispies-platform-the-initial-experience-in-argentina
#20
Julian Di Guilmi, Maria Cecilia Darin, Maria Toscano, Gustavo Maya
OBJECTIVE: To demonstrate the initial experience in Argentina using the iSpies ICG platform in performing sentinel lymph node mapping in early-stage cervical cancer. Design Step-by-step video and pictures BACKGROUND: Laparoscopic and robotic sentinel lymph node mapping using ICG has been shown to be safe and feasible. However, the use of fluorescent imaging through a minimally invasive approach in developing countries is very limited given the cost restrictions of acquiring the near infrared technology and the fluorescent dyes...
September 11, 2017: Journal of Minimally Invasive Gynecology
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