Investigation of dental cone-beam CT pixel data and a modified method for conversion to Hounsfield unit (HU)
| Autor: | Natalie Beckmann, Minou Luo, Marc A. Felice, Thomas Yoo, Mel Mupparapu, Dennise Magill |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Cone beam computed tomography
Pixel business.industry Phantoms Imaging Modified method Image processing 030206 dentistry General Medicine Iterative reconstruction Cone-Beam Computed Tomography Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences DICOM 0302 clinical medicine Otorhinolaryngology Hounsfield scale Medicine Humans Radiographic Image Interpretation Computer-Assisted Radiology Nuclear Medicine and imaging business Nuclear medicine General Dentistry Research Article |
| Popis: | To investigate the relationship in dental cone-beam CT (CBCT) between the manufacturer-reported image pixel data and a modified conversion to CT number densities in Hounsfield unit (HU).A standardized CT phantom was imaged using typical clinical parameters on CBCT from three manufacturers (Carestream 9300The DICOM header data show that a modified rescale y-intercept was applied to both the Carestream and Planmeca image data yielding manufacturer-produced results in HU. The Morita pixel data were unmodified and report in shades of grey or grey values (GV). The Carestream manufacturer-derived HU measurements showed good correlation in air (-1000 HU), but all other materials ranged from 2.6 to 13.5 σ from the specified phantom value. Results in the modified conversion technique images fell within 1.0-2.4 σ from the specified phantom values.While more studies are needed to test for regularity, this study suggests that our modified technique could be a means of getting more accurate quantitative data from dental CBCTs. |
| Databáze: | OpenAIRE |
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