A Review of the Optical Tomography System

2014 ◽  
Vol 69 (8) ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Herlina Abdul Rahim ◽  
Naizatul Shima Mohd Fadzil ◽  
Mohd Hafiz Fazalul Rahiman ◽  
...  
Keyword(s):  
High Resolution ◽  
Image Reconstruction ◽  
Basic Principle ◽  
Radiation Source ◽  
Optical Tomography ◽  
Electrical Noise ◽  
Basic Construction ◽  
Tomography System ◽  
Tomography Method

Tomography is a method that has been used for image reconstruction in the medical and engineering fields. Optical tomography is one of the various methods applied in tomography systems. This tomography method is widely used in the medical and processing industries fields because of its special characteristics, such as immunity to electrical noise and interference, high resolution and its hard field sensors. The basic principle of the optical tomography system in measuring an object is based on its wave and radiation source. This article is a review of the characteristics of light and its interaction with matter, the types of optical tomography system, the basic construction of an optical tomography system, types of optoelectronic sensors and image reconstruction.

Introducing an Application of a Charged Coupled Device (CCD) in an Optical Tomography System

2015 ◽  
Vol 73 (3) ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Herlina Abdul Rahim ◽  
Hafiz Fazalul Rahiman ◽  
Siti Zarina Mohd Muji ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Basic Principle ◽  
High Performance ◽  
Optical Tomography ◽  
Video Camera ◽  
Displacement Measurement ◽  
Basic Construction ◽  
Tomography System ◽  
Internal Object

A tomographic system is a method used for capturing an image of an internal object section. Optical tomography is one method which widely used in medical and industrial fields. This paper reviews several applications of Charged Coupled Devices (CCD) and introduces an application of a CCD in an optical tomography system. Most of the previous research used this component for displacement measurement and as a video camera. This paper discusses its basic principle of operation, basic construction, its criteria, application, and its advantages compared to other optoelectronic sensors  available in today’s market. The applications of this sensor in fields such as astronomy and medical has proved the ability and the good performance of CCD in capturing images. This sensor should widen its usage in optical tomography fields because it can give high performance in image reconstruction. 

Concentration Profiling Of Two Phase Flow In A Gravity Flow Rig Using Optical Tomography

2012 ◽  
Author(s):  
Sallehuddin Ibrahim ◽  
Mohd Fua’ad Rahmat ◽  
Mustafa Musbah Elmajri ◽  
Mohammad Amri Mohammad Yunus
Keyword(s):  
Cross Section ◽  
Two Phase Flow ◽  
Optical Tomography ◽  
Solid Particles ◽  
Gravity Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Tomography System ◽  
Infra Red ◽  
Tomography Method

Matlamat kertas kerja ini ialah untuk membentangkan penyelidikan tentang penggunaan kaedah tomografi optik menggunakan penderia–penderia infra merah untuk pemantauan masa nyata terhadap zarah–zarah pepejal yang dialirkan oleh rig aliran graviti. Penderia terdiri daripada dua projeksi cahaya orthogonal dan dua projeksi cahaya melintang untuk membentuk deretan atas dan bawah menjadi empat projeksi selari. Penumpuan pancaran daripada satu sumber cahaya dan mengalirkannya melalui rejim aliran yang memastikan keamatan pancaran dikesan pada bahagian yang bertentangan disambungkan kepada agihan dan pekali serapan bagi fasa–fasa yang berbeza dalam laluan pancaran. Maklumat pada aliran yang diperolehi oleh penderia-penderia yang dipasang di bahagian atas dan bawah akan dijadikan dalam bentuk digital oleh sistem perolehan data sebelum ia dihantar ke sebuah computer untuk dianalisis untuk memaparkan keratan silang imej. Penyelidikan ini berjaya dikembangkan dan diuji menggunakan sebuah sistem tomografi infra merah untuk memaparkan kepekatan aliran dwi fasa dalam rig aliran gravity. Kata kunci: Profil kepekatan; aliran dwi fasa; tomografi optic; infra-merah; aliran pepejal The objective of this paper is to present research on the use of an optical tomography method using infra–red sensors for real–time monitoring of solid particles conveyed by a gravity flow rig. The sensor comprised two orthogonal and two diagonal light projections to form upstream and downstream arrays in a total of four parallel projections. Collimating the radiated beam from a light source and passing it through a flow regime ensures that the intensity of radiation detected on the opposite side is linked to the distribution and the absorption coefficients of the different phases in the path of the beam. The information on the flow captured using upstream and downstream infra-red sensors is digitized by the DAS system before it was passed into a computer to be analyzed in order to reconstruct the cross section image. This investigation successfully developed and tested an infra–red tomography system to profile the concentration of two phase flow in a gravity flow rig. Key words: Concentration profiles; two phase flow; optical tomography; infra–red; solid flow

OPTICAL TOMOGRAPHY SYSTEM: APPLICATION OF CHARGE COUPLED DEVICE (CCD) FOR SOLID AND TRANSPARENT OBJECTS DETECTION

2016 ◽  
Vol 78 (7-4) ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Herlina Abdul Rahim ◽  
Hafiz Fazalul Rahiman ◽  
Siti Zarina Mohd Muji ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Laser Diode ◽  
Optical Tomography ◽  
Pipeline System ◽  
Cross Sectional ◽  
Charge Coupled Device ◽  
Tomography System ◽  
Solid Objects ◽  
Transparent Objects ◽  
Objects Detection

This research presents an application of Charge Coupled Device (CCD) linear sensor and laser diode in an optical tomography system. These optoelectronic sensors are believed to detect solid objects rather than transparent objects. Based on the research results, the development of optical tomography system using Charge Coupled Device (CCD) and laser diode has helped to enhance the potential of these sensors in detecting high to low opacity objects. Experiments for detecting a solid rod, glass rod and transparent hollow straw in non-flowing crystal clear water were conducted in this study. Investigation on the effect of number of views also studied in this research. From the image reconstruction results, it clearly shows a cross-sectional image of a pipeline system with the existence of opaque and transparent objects in multiphase flows. For 320 views image reconstruction, it gives high resolution of image results compared to 160 views image reconstruction. 

Analysis on the Effect of Sensor Views in Image Reconstruction Produced by Optical Tomography System Using Charge-Coupled Device

2018 ◽  
Vol 27 (4) ◽  
pp. 1689-1696 ◽  
Author(s):  
Juliza Jamaludin ◽  
Ruzairi Abdul Rahim ◽  
Mohd. Hafiz Fazul Rahiman ◽  
Jemmy Mohd Rohani
Keyword(s):  
Image Reconstruction ◽  
Optical Tomography ◽  
Charge Coupled Device ◽  
Tomography System

scholarly journals High Resolution, Deep Imaging Using Confocal Time-of-flight Diffuse Optical Tomography

2021 ◽  
pp. 1-1
Author(s):  
Yongyi Zhao ◽  
Ankit Raghuram ◽  
Hyun Kim ◽  
Andreas Hielscher ◽  
Jacob T Robinson ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Tomography ◽  
Time Of Flight ◽  
Diffuse Optical Tomography ◽  
Deep Imaging
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