学位論文

フォトンカウンティング形X線CTを用いた媒質同定に関する研究

Material Decomposition using a Photon Counting CT System

jpn

1

53

2015-03-24

Not Applicable (or Unknown)

2015-03-24

修士(工学)

理工学研究科応用情報工学専攻; 指導教授: 尾川浩一

The purpose of this research is to validate the availability of a material decomposition with a photon counting CT. We used a photon counting detector that was able to measure four energy bins. And then, a principal component analysis, least squares method and singular value decomposition method were used for the material decomposition. We conducted some simulations and experiments. The materials used were water, calcium, gold-colloid, and gadolinium contained water. We evaluated the performance of the photon counting CT images in terms of the accuracy of reconstructed linear attenuation coefficients and density values. The results indicated that our detector could measure a material density with satisfactory accuracy using the singular value decomposition method. The results showed that our photon counting CT system was useful for the material decomposition.

Thesis