- Conference date: 29 June–1 July 2009
- Location: Kuala Lumpur (Malaysia)
A method to measure noise power spectrum of a full field digital mammography system is presented. The effect of X‐ray radiation dose, size and configuration of region of interest on normalized noise power spectrum (NNPS) was investigated. Flat field images were acquired using RQA‐M2 beam quality technique (Mo/Mo anode‐filter, 28 kV, 2 mm Al) with different clinical radiation doses. The images were cropped at about 4 cm from the edge of the breast wall and then divided into different size of non‐overlapping or overlapping segments. NNPS was determined through detrending, 2‐D fast Fourier transformation and normalization. Our measurement shows that high radiation dose gave lower NNPS at a specific beam quality.
- Digital mammography
- Medical imaging
- Fourier transforms
- Medical image quality
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