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| Titel: |
Development of DICOM image-based CT low dose simulator using fan-beam transform |
| Auteur: |
Horiuchi, Tetsuya Yamamoto, Shuji Murase, Kenya |
| Verschenen in: |
Technology & health care |
| Paginering: | Jaargang 21 (2013) nr. 5 pagina's 441-454 |
| Jaar: |
2013-09-04 |
| Inhoud: |
BACKGROUND: Projection-data based method is established as an accurate simulation of low-dose CT, but cooperation of the CT manufacturer is required. Image-based method is awaited for independent and efficient research. OBJECTIVE: To develop and verify image-based method for adding noise to DICOM images. METHODS: This technique reproduces projection data by fan-beam transform of the DICOM image data and by creating and reconstructing noise projections into a noise image that can be added to the original image. A cylindrical test phantom and anthropomorphic phantom were used to verify the simulation method for both standard and adaptive iterative reconstruction methods. RESULTS: The simulated images compared favorably with actual images. Standard deviation difference of the simulated images were 1.27% ± 0.81% (cylindrical phantom) and ranged from 1.61% ± 0.81% (head), to 5.41% ± 1.57% (hepatic portal region) (anthropomorphic phantom). The standard deviation difference of the cylindrical phantom with the adaptive iterative technique were 3.41% ± 1.76% at 50% ASIR and 3.85% ± 1.82% at 100% ASIR. The simulated noise power spectra of both types of images were comparable to the actual images. CONCLUSION: We developed and validated a DICOM image-based low-dose simulation that allows researchers to perform dose reduction research independently and efficiently. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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