Precision and resolution of quantitative imaging by combining spectral and non-spectral material decomposition
AssigneeKoninklijke Phlips N.V.
InventorsJon Erik FREDENBERG, Karl Erik Lenason BERGGREN
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Abstract
The invention proposes to combine spectral image data with non-spectral image data in order to overcome limitations of the different data taking methods. Results from the methods are preferably combined as functions of spatial frequency so that spectral image data provide high accuracy at low frequencies, whereas the non-spectral image data helps reducing the noise at high frequencies. The invention enables a range of applications in different fields of X-ray imaging such as improved tissue contrast and tissue characterization.
Claims13
A calculation unit for processing quantitative image data,
- wherein the calculation unit comprises,
- a receiving unit;
- and
- a processing unit,
- wherein the receiving unit is configured for receiving spectral image data of an object of interest;
- wherein the receiving unit is configured for receiving non-spectral image data of the object of interest,
- wherein the processing unit is configured for calculating material properties as a function of position from the spectral image data;
- wherein the processing unit is configured for calculating material properties as a function of position from the non-spectral image data;
- wherein the processing unit is configured for combining the material properties calculated from the spectral and from the non-spectral image data as a function of spatial frequency by weighting the spectral and the non-spectral image data depending on the spatial frequencies in the image.
A method for quantitative image data processing, the method comprising the following steps:
- Acquiring spectral image data of an object of interest;
- Calculating material properties as a function of position from the spectral image data;
- Acquiring non-spectral image data of the object of interest;
- Calculating material properties as a function of position from the non-spectral image data;
- and
- Combining the material properties calculated from the spectral and from the non-spectral image data as a function of spatial frequency comprising the step of weighting the spectral and the non-spectral image data depending on the spatial frequencies of the image.
Dependencies are inferred from the claim text.