Table 4.

Zero-frequency DQE for a 120-kVp spectrum and 300-mm water attenuation, for Si and CdTe detector designs, with scatter from the imaged object and antiscatter grid. The 1-D grid of 0.1-mm thick lamellae with 1-mm spacing was used for all detector designs.

Detector design	Water detection	Iodine detection	Water quantification	Iodine quantification
60-mm Si, W	0.52	0.39	0.29	0.23
60-mm Si, no W	0.55	0.45	0.40	0.33
3 mm CdTe, $500\mu \mathrm{m}$ pixels	0.73	0.49	0.33	0.22
1.6-mm CdTe, $225\mu \mathrm{m}$ pixels, $\sigma =22.7\mu \mathrm{m}$	0.65	0.40	0.16	0.10
1.6-mm CdTe, $225\mu \mathrm{m}$, $\sigma =12.1\mu \mathrm{m}$	0.67	0.43	0.20	0.13