| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
To optimize patient dose in dual-energy computed tomography (DECT), radiation dose and image quality, operating characteristics of automatic exposure control (AEC), and physical and clinical assessment of attenuation values in virtual non-contrast (VNC) images were evaluated. Although DECT provides images which have image quality inferior to single-energy CT (SECT), it can be performed with less radiation dose. The combination of AEC and DECT is unsuitable for obese patients because it tends to provide lower radiation dose and higher image noise levels than the combination of AEC and SECT. Attenuation in VNC images differs depending on the acquisition protocol, patient size, and contrast agent concentration.
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