Material characterization of dual-energy computed tomographic data using polar coordinates
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Updated: Apr 23, 2026

Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy
Published on: September 8, 2023
Lukas Havla1, Michael Peller, Clemens Cyran
1From the *Josef Lissner Laboratory for Biomedical Imaging, Institute for Clinical Radiology; and †Institute for Clinical Radiology, Ludwig Maximilians University Hospital Munich, Munich; and ‡Department of Radiology, University Hospitals Tübingen, Tübingen, Germany.
Abstract:
The purpose of this study was to evaluate a new dual-energy computed tomographic postprocessing approach on the basis of the transformation of dual-energy radiodensity data into polar coordinates. Given 2 corresponding dual-energy computed tomographic images, the attenuation data D(U1), D(U2) in Hounsfield units of both tube voltages (U1,U2) were transformed for each voxel to polar coordinates: r (distance to the radiodensity coordinate origin) is an approximate measure of electron density and φ (angle to the abscissa) differentiates between materials.
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