CT Artefact Reduction by Signal to Thickness Calibration Function Shaping
- NázevTitle
- CT Artefact Reduction by Signal to Thickness Calibration Function ShapingCT Artefact Reduction by Signal to Thickness Calibration Function Shaping
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- D. Vavřík
- Klíčová slovaKeywords
- Wedge test, Flat field correction, Signal to thickness function, Digital radiography
- DOIDOI
- 10.1016/j.nima.2010.06.160
- Časopis / citaceJournal / citation
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 633, S177-S180 (2011) · ISSN 0168-9002
- RokYear
- 2011
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Spolupráce ČR s CERNCollaboration of the Czech Republic with CERN
- CitovánoCited by
- 2 (OpenAlex)
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
It is frequently a task to calibrate the radiogram intensity in reference to the object thickness/density value. This knowledge is important when the radiographic densitometry, thickness measurements or precise computed tomography are required. Often aluminum is used as calibrating material and processed radiogram of the real object is evaluated as aluminum equivalent. This approach is qualitatively convenient for transmission radiograms; however, certain secondary artefacts remain in CT reconstructions. Fortunately the calibration function can be shaped using only one or two known thickness values of the object investigated. The shaped calibration function obtained produces the right signal to thickness relationship and CT quality is improved when it is applied.
It is frequently a task to calibrate the radiogram intensity in reference to the object thickness/density value. This knowledge is important when the radiographic densitometry, thickness measurements or precise computed tomography are required. Often aluminum is used as calibrating material and processed radiogram of the real object is evaluated as aluminum equivalent. This approach is qualitatively convenient for transmission radiograms; however, certain secondary artefacts remain in CT reconstructions. Fortunately the calibration function can be shaped using only one or two known thickness values of the object investigated. The shaped calibration function obtained produces the right signal to thickness relationship and CT quality is improved when it is applied.