By SEC Co.,Ltd
Cone-beam CT is a method reconstructing 3D tomography image using projection image gained by rotating inspection object 360° after placing the object between X-ray generator and detector. (Figure 1). It can acquire high-resolution 3D volume image about object within FOV by single rotation. Generally used for medical images that low-dose and high-speed scan is necessary and industrial images. Cone-beam CT doesn’t have theoretically accurate algorithm unlike Fan-beam CT. So, as Cone angle getting larger (more away from rotation center axis vertically), the error gets worse and this is called Cone-beam Artifacts. Cone-beam Artifacts according to Cone angle is seen in Figure 2. We developed an algorithm efficiently reducing Cone-beam Artifacts through various study about various ways to eliminate Cone-beam Artifacts. Ball phantom reconstructed image with Cone-beam Artifacts at Cone angle of 30° and result image applied our Cone-beam Artifact reduction algorithm are seen in Figure 3. You can see artifact occurred according to large Cone angle is reduced a lot.
