Back to Search
Start Over
Dual-energy imaging of the chest: Optimization of image acquisition techniques for the ‘bone-only’ image.
- Source :
-
Medical Physics . Feb2008, Vol. 35 Issue 2, p629-632. 4p. 2 Black and White Photographs, 2 Graphs. - Publication Year :
- 2008
-
Abstract
- Experiments were conducted to determine optimal acquisition techniques for bone image decompositions for a prototype dual-energy (DE) imaging system. Technique parameters included kVp pair (denoted [kVpL/kVpH]) and dose allocation (the proportion of dose in low- and high-energy projections), each optimized to provide maximum signal difference-to-noise ratio in DE images. Experiments involved a chest phantom representing an average patient size and containing simulated ribs and lung nodules. Low- and high-energy kVp were varied from 60–90 and 120–150 kVp, respectively. The optimal kVp pair was determined to be [60/130] kVp, with image quality showing a strong dependence on low-kVp selection. Optimal dose allocation was approximately 0.5—i.e., an equal dose imparted by the low- and high-energy projections. The results complement earlier studies of optimal DE soft-tissue image acquisition, with differences attributed to the specific imaging task. Together, the results help to guide the development and implementation of high-performance DE imaging systems, with applications including lung nodule detection and diagnosis, pneumothorax identification, and musculoskeletal imaging (e.g., discrimination of rib fractures from metastasis). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00942405
- Volume :
- 35
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Medical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 28844282
- Full Text :
- https://doi.org/10.1118/1.2828186