Full-field AO-assisted OCT for high-resolution tomographic imaging of the retina

2006 ◽  
Author(s):  
M. Glanc ◽  
D. Lafaille ◽  
P. Puget ◽  
F. Lacombe ◽  
L. Vabre ◽  
...  
Keyword(s):  
High Resolution ◽  
Tomographic Imaging ◽  
Full Field

Adaptive glasses wavefront sensorless Full-Field OCT for high-resolution in vivo retinal imaging over a wide FOV

2021 ◽  
Author(s):  
Yao Cai ◽  
Jules Scholler ◽  
Kassandra Groux ◽  
Olivier Thouvenin ◽  
Claude Boccara ◽  
...  
Keyword(s):  
High Resolution ◽  
Retinal Imaging ◽  
Full Field ◽  
Wide Fov

scholarly journals Development of High-Fidelity Imaging Procedures to Establish the Local Material Behavior in Friction Stir Welded Stainless Steel Joints

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 592
Author(s):  
S. Ramachandran ◽  
A. Lakshminarayanan ◽  
P. Reed ◽  
J. Dulieu-Barton
Keyword(s):  
Stainless Steel ◽  
High Resolution ◽  
Microstructural Characterization ◽  
Local Strain ◽  
Material Behavior ◽  
Image Correlation ◽  
Full Field ◽  
Friction Stir ◽  
2D Digital Image Correlation ◽  
304 Austenitic Stainless Steel

Friction stir welded (FSW) 304 austenitic stainless steel (SS) joints are studied using a range of microstructural characterization techniques to identify various sub-regions across the weld. A high-resolution (HR) 2D-digital image correlation (DIC) methodology is developed to assess the local strain response across the weld surface and cross-section in the elastic regime. The HR-DIC methodology includes the stitching of multiple images, as it is only possible to partially cover the FSW region using a single camera with the high-resolution optical set-up. An image processing procedure is described to stitch the strain maps as well as strain data sets that allow full-field strain to be visualized and interrogated over the entire FSW region. It is demonstrated that the strains derived from the DIC can be associated with the local weld geometry and the material microstructure in the region of the FSW. The procedure is validated in the material elastic range and provides an important first step in enabling detailed mechanical assessments of the local effects in the FSW process.

scholarly journals Galactography with Tomosynthesis Technique (Galactomosynthesis) – Renaissance of a Method?

2018 ◽  
Vol 78 (05) ◽  
pp. 493-498 ◽  
Author(s):  
Rüdiger Schulz-Wendtland ◽  
Caroline Preuss ◽  
Peter Fasching ◽  
Christian Loehberg ◽  
Michael Lux ◽  
...  
Keyword(s):  
High Resolution ◽  
Ductal Carcinoma In Situ ◽  
Carcinoma In Situ ◽  
Ductal Carcinoma ◽  
Imaging Technique ◽  
Nipple Discharge ◽  
Full Field ◽  
Contrast Enhanced ◽  
First Time

Abstract Introduction For decades, conventional galactography was the only imaging technique capable of showing the mammary ducts. Today, diagnosis is based on a multimodal concept which combines high-resolution ultrasound with magnetic resonance (MR) mammography and ductoscopy/galactoscopy and has a sensitivity and specificity of up to 95%. This study used tomosynthesis in galactography for the first time and compared the synthetic digital 2D full-field mammograms generated with this technique with the images created using the established method of ductal sonography. Both methods should be able to detect invasive breast cancers and their precursors such as ductal carcinoma in situ (DCIS) as well as being able to identify benign findings. Material and Methods Five patients with pathological nipple discharge were examined using ductal sonography, contrast-enhanced 3D galactography with tomosynthesis and the synthetic digital 2D full-field mammograms generated with the latter method. Evaluation of the images created with the different imaging modalities was done by three investigators with varying levels of experience with complementary breast diagnostics (1, 5 and 15 years), and their evaluations were compared with the histological findings. Results All 3 investigators independently evaluated the images created with ductal sonography, contrast-enhanced 3D galactography with tomosynthesis, and generated synthetic digital 2D full-field mammograms. Their evaluations were compared with the histopathological assessment of the surgical specimens resected from the 5 patients. There was 1 case of invasive breast cancer, 2 cases with ductal carcinoma in situ and 2 cases with benign findings. All 3 investigators made more mistakes when they used the standard imaging technique of ductal sonography to diagnose suspicious lesions than when they used contrast-enhanced galactography with tomosynthesis and the generated synthetic digital 2D full-field mammograms. Conclusion This is the first time breast tomosynthesis was used in galactography (galactomosynthesis) to create digital 3-dimensional images of suspicious findings. When used together with the generated synthetic digital 2D full-field mammograms, it could be a useful complementary procedure for the diagnosis of breast anomalies and could herald a renaissance of this method. Compared with high-resolution ductal ultrasound, the investigators achieved better results with contrast-enhanced galactography using tomosynthesis and the generated synthetic digital 2D full-field mammograms, as confirmed by histopathological findings.

Development of high-resolution full-field x-ray microscope based on multilayer advanced Kirkpatrick-Baez mirrors (Conference Presentation)

2019 ◽  
Author(s):  
Satoshi Matsuyama ◽  
Jumpei Yamada ◽  
Taku Hagiwara ◽  
Kazuhiko Omote ◽  
Raita Hirose ◽  
...  
Keyword(s):  
High Resolution ◽  
Full Field ◽  
X Ray
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