Energy-resolved computed tomography measurements of iron solution and adipose as a simulation for estimating the iron concentration in the human liver

Figures & data

Table 1 Assigned energy ranges (keV)

E 1	E 2	E 3	E 4	E 5	E 6
15–50	50–55	55–70	70–90	90–110	110–120

Figure 1 Experimental setup for obtaining response functions

Figure 2 Schematic drawings of 30-mm-diameter cylindrical phantoms with (a) four holes and (b) two holes. The heights of these phantoms are 60 mm

Figure 3 Relationship between x, θ and l and measurement point k

Figure 4 CT images of iron solutions with concentrations of 50, 100, 150 and 200 μmol/g obtained by (a) current-measurement CT and (b) energy-resolved CT obtained by X-ray events in the energy range E ₁

Figure 5 Relationship between the iron concentration and CT value

Figure 6 CT images of adipose and iron solution obtained by the X-ray events in the energy ranges (a) E ₁ and (b) E ₄

Figure 7 CT value profiles along the centerline of the iron and adipose regions obtained by the X-ray events in the energy ranges E ₁ (solid line) and E ₄ (dashed line), respectively

Figure 8 Linear attenuation coefficients of iron, adipose and acrylic [8]

Figure 9 Two-dimensional map of CT values obtained by the X-ray events in the energy ranges E ₁ and E ₄ for iron, adipose and acrylic

Hubbell , J H and Seltzer , S M . 2010 . Tables of X-ray mass attenuation coefficients and mass energy-absorption coefficients from 1 keV to 20 MeV for elements Z = 1 to 92 and 48 additional substances of dosimetric interest , The Physical Measurement Laboratory, The National Institute of Standard and Technology . http://www.nist.gov/pml/data/xraycoef/index.cfm

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