[Development of a laser-optical tomograph for demonstration of CT imaging without ionizing radiation]
Related Experiment Video
Updated: Sep 28, 2026

Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
Published on: August 16, 2012
M E Bellemann1, T Baier, B Seitz
1Department of Biomedical Engineering, University of Applied Sciences, Jena, Germany. bellemann@fh-jena.de
Abstract:
Computed X-ray tomography (CT) is one of the most powerful diagnostic procedures in medicine. In this study, we developed a laser-optical CT scanner for the use by students as part of their curriculum in biomedical engineering. Our CT set-up employs a linear-scan technique where the measurement objects (light absorbing phantoms embedded in immersion oil), the light emitter (modulated laserdiode), and the detector (photodiode) are moved by linear-step motors. The spatial resolution is limited by the width of the laser beam (2 mm) and the smallest achievable raster step size (0.02 mm). Optical tomographic images of various objects can be measured within a few minutes and allow the demonstration of imaging principles like extinction, scanning, projection, and reconstruction techniques.
More Related Videos
12:24Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
Published on: July 17, 2012
07:57Scaled Anatomical Model Creation of Biomedical Tomographic Imaging Data and Associated Labels for Subsequent Sub-surface Laser Engraving (SSLE) of Glass Crystals
Published on: April 25, 2017
Related Concept Videos
Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies I: CT and MRI
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Imaging Studies III: Computed Tomography