(A) rigid motion compensation using registration of opposite projections for cone-beam CT = X-ray CT 의 움직임으로 인한 인공 음영 제거 연구

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Cone-beam computed tomography (CBCT) is widely used to get high spatial resolution images. However, a small amount of involuntary patient motion can degrade the quality of CBCT images, resulting in motion artifact. To address the issue, investigators have proposed various motion compensation algorithms. In this study, we present a novel method to compensate the patient motion using registration of opposite projections. The novel method estimates a translating rigid motion of a patient by finding the motion vector which maximizes the two dimensional correlation coecients of the opposite projections. The estimated motion is compensated by shifting a back-projection source in a reconstruction process. Results of real data and simulations show that the proposed method successfully compensates the motion artifact.
Advisors
Ye, Jongchulresearcher예종철researcher
Description
한국과학기술원 :바이오및뇌공학과,
Publisher
한국과학기술원
Issue Date
2016
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 바이오및뇌공학과, 2016.8,[vi, 37 p. :]

Keywords

Cone-beam computed tomography▼amotion artifact▼aopposite projections▼atwo dimensional correlation▼atranslational motion; 전산화 단층 촬영▼a움직임 인공 음영▼a마주한 촬영 자료▼a이차원 상관관계▼a평행이동

URI
http://hdl.handle.net/10203/266175
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=849876&flag=dissertation
Appears in Collection
BiS-Theses_Master(석사논문)
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