CAJ | 학술논문

窄角扇束CT已在工业领域广泛应用.为了研究窄角扇束CT的图像重建算法,节省扫描检测成本,对其进行仿真研究很有必要.在分析窄角扇束CT扫描特点的基础上,推导建立窄角扇束CT仿真投影计算公式.为了验证仿真投影计算的准确性,对 Shepp-Logan 头部模型进行仿真投影计算和图像重建,重建结果验证了仿真投影计算公式的有效性和准确性.该方法还可以应用到广角扇束CT的仿真投影计算中.
착각선속CT이재공업영역엄범응용.위료연구착각선속CT적도상중건산법,절성소묘검측성본,대기진행방진연구흔유필요.재분석착각선속CT소묘특점적기출상,추도건립착각선속CT방진투영계산공식.위료험증방진투영계산적준학성,대 Shepp-Logan 두부모형진행방진투영계산화도상중건,중건결과험증료방진투영계산공식적유효성화준학성.해방법환가이응용도엄각선속CT적방진투영계산중.
Narrow fan-beam CT is widely used in industrial field. To study the narrow fan beam computed tomography (CT) reconstruction algorithm and save scanning cost, there needs to carry out simulation of narrow fan-beam CT projection. On the basis of the characteristic of narrow fan-beam CT, we establish formula of narrow fan-beam CT simulation projections. In order to prove the effectiveness of formula of simulation projections, Shepp-Logan model was chosen to conduct simulation and image reconstruction. Results show that the formula of simulation projections is effective and accurate. The method can also be applied to the computation of wide fan beam CT projections.