Comparison of three different techniques for dual-energy subtraction imaging in digital radiography: a signal-to-noise analysis.

摘要: Dual-energy subtraction imaging techniques allow the tissue and bone structures in patient to be visualized studied two separate images, thus removing obscurity associated with overlapping of structures. In addition, they image signals used for quantifying thicknesses. Thus, capability dual-energy is often incorporated new digital radiography systems. There are three different approaches techniques. Among them, dual-kilovolt (peak) [kV(p)] sandwich detector have been widely approaches. A third approach single-kV(p) dual-filter technique, which allows some flexible control spectra while avoiding technical complexity kV(p) value switching slitscan imaging. this report, noise properties these compared by computing variances as a function values filter It was found that dual-kVp technique results least noisy whereas slightly less images than technique. Following optimization thicknesses, result level approximately four times higher resulted from dual-kV(p) respectively.