Abstract
Dual-layer, or stacked, detectors reduce motion artifacts in combined X-ray images, such as k-edge images, by acquiring low-and high-energy signals simultaneously. In this work we constructed a prototype single pixel dual-layer detector using amorphous selenium (a-Se) as the conversion material based on the same technology used for commercial large area flat panel imagers. A cascaded detector model was used to model the detector and for comparison with the experimental measurements. The detector was demonstrated to obtain contrast-enhanced mammography signals using an iodinated contrast agent. The experimentally obtained contrast was compared with the model and good agreement was found demonstrating the feasibility of the dual-layer technology. For comparison purposes, a single-layer single pixel detector capable of k-edge imaging but prone to motion artifacts (acquiring low-and high-energy signals sequentially) was also studied.
Original language | English (US) |
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Article number | 6303849 |
Pages (from-to) | 1856-1861 |
Number of pages | 6 |
Journal | IEEE Transactions on Nuclear Science |
Volume | 59 |
Issue number | 5 PART 1 |
DOIs | |
State | Published - 2012 |
Externally published | Yes |
Keywords
- Amorphous selenium
- X-ray detectors
- contrast-enhanced mammography
- digital mammography
- dual-energy
- dual-layer
- k-edge imaging
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering