Related Experiment Video
Updated: Feb 3, 2026
08:21
Wideband Optical Detector of Ultrasound for Medical Imaging Applications
Published on: May 11, 2014
11.8K
Reconstruction of Optical Vector-Fields With Applications in Endoscopic Imaging
IEEE Transactions on Medical Imaging
|October 19, 2018
Summary
We developed a new method to reconstruct optical vector-fields, revealing scattering changes in tissues. This technique aids in distinguishing healthy tissue from early-stage oesophageal cancer tumors.
Area of Science:
- Optical Physics
- Biomedical Imaging
- Computational Optics
Background:
- Optical vector-field reconstruction is crucial for advanced imaging.
- Existing methods struggle with unknown imaging system characteristics.
- Characterizing tissue optical properties non-invasively remains a challenge.
Purpose of the Study:
- To introduce a novel framework for reconstructing optical vector-fields.
- To enable reconstruction irrespective of the device's kernel and calibration basis.
- To identify scattering signatures indicative of tissue abnormalities.
Main Methods:
- Developed a reconstruction framework using regularization terms.
- Enabled recovery of optical vector-fields in arbitrary representation systems.
- Utilized Fourier basis for analysis of scattering properties.
Main Results:
- Successfully reconstructed optical vector-fields from integral transform measurements.
- Demonstrated recovery using synthetic data and experimental holographic images.
- Identified indicative features of increased scattering in biological tissues.
Conclusions:
- The proposed framework effectively reconstructs optical vector-fields with unknown system kernels.
- Recovered Fourier coefficients serve as valuable biomarkers for early cancer detection.
- This method shows promise for non-invasive diagnosis of oesophageal cancer.
Related Concept Videos
01:27Induced Electric Fields: Applications
2.6K
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
2.6K
01:28Field Application of Global Positioning System
332
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
332
01:18Imaging Biological Samples with Optical Microscopy
10.3K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
10.3K
01:30Vectors
480
Vectors are mathematical entities characterized by both magnitude and direction. Unlike scalars, which are defined solely by magnitude, vectors represent quantities like displacement, velocity, and force, where direction is essential. Vectors are graphically represented as directed line segments, extending from an initial point to a terminal point, denoted with bold letters or arrows placed above the symbol. Two vectors are deemed equal if they share identical magnitudes and directions,...
480
01:10Reconstruction of Signal using Interpolation
729
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
729
01:26Endoscopic Studies II: Thoracocentesis
1.4K
Thoracentesis(Thoracocentesis), commonly known as pleural tap, is a medical procedure where a 22 gauge needle is inserted into the pleural space, the area between the lung and chest wall. This procedure is commonly performed to diagnose or treat various respiratory disorders.
Description
Excess pleural fluid or air may accumulate in some respiratory disorders in the thoracic cavity. To treat pleural effusion, a physician conducts thoracentesis by carefully piercing the chest wall and entering...
Description
Excess pleural fluid or air may accumulate in some respiratory disorders in the thoracic cavity. To treat pleural effusion, a physician conducts thoracentesis by carefully piercing the chest wall and entering...
1.4K