[Investigation of Energy Subtraction in a CT System.].
Developments in CT units for medical diagnoses permit to energy subtraction in CT radiography. Experiments were done for CT energy subtraction using a TOS phantom, self-made phantom and dry human skull at two tube voltages of 80kV and 135kV. The TOS phantom filled with water had six compartments of air, polyoxymethylene, polymethyl methacrylate, polyamide and polypropylene. The self-made phantom which included a cylinder filled with contrast medium was used for the contrast vessel. Bone contents disappeared selectively from images of both the self-made phantom and the human skull. In these cases, disappearance of selected materials was achieved by changing the coefficient of CT subtraction. It was confirmed that the procedure could be used for a variety of materials.
Yonemura
Masaaki
M
Department of Radiology, Nagasaki Medical Center, 2-1001-1, Kubara, Omura, Nagasaki, 856-8562, Japan. yonemura@nmc,hosp.go.jp.
Kabusaki
Ritsuko
R
Yoshida
Hideteru
H
D001842:Bone and Bones; D003287:Contrast Media; D006801:Humans; D019047:Phantoms, Imaging; D014057:Tomography, X-Ray Computed
D003287:Contrast Media