Fan-beam scanning laser optical computed tomography for large volume dosimetry

9th International Conference on 3D Radiation Dosimetry

Dekker, K.H.^1 ; Battista, J.J.^1 ; Jordan, K.J.^1

London Regional Cancer Program, London Health Sciences Centre, Department of Medical Biophysics, Western University, London

ON, Canada^1

关键词: Acceptance angle;    Beer Lambert law;    High resolution;    Interference fringe;    Large volumes;    Optical computed tomography;    Parallel beams;    Scanning lasers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012008/pdf
DOI  :  10.1088/1742-6596/847/1/012008

来源: IOP

【 摘 要 】

A prototype scanning-laser fan beam optical CT scanner is reported which is capable of high resolution, large volume dosimetry with reasonable scan time. An acylindrical, asymmetric aquarium design is presented which serves to 1) generate parallel-beam scan geometry, 2) focus light towards a small acceptance angle detector, and 3) avoid interference fringe-related artifacts. Preliminary experiments with uniform solution phantoms (11 and 15 cm diameter) and finger phantoms (13.5 mm diameter FEP tubing) demonstrate that the design allows accurate optical CT imaging, with optical CT measurements agreeing within 3% of independent Beer-Lambert law calculations.