title: Angle dependent focal spot size of a conical X-ray target.
abstract: Misaligned phantoms may severely affect the focal spot calculations. A method is proposed to determine the geometry of the X-ray target and the position of the image radiograph around the X-ray target to get a relatively smaller focal spot size. Results reveal that the focal spot size is not always isotropic around the target but it decreases as the point of observation shifts radially away from the center line of the conical X-ray target. This research will help in producing high quality X-ray images in multi-directions by properly aligning the phantoms and the radiograph tallies.
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong, Yuseong, Daejeon 305-701, Republic of Korea. Electronic address: engg_hamidsaeed@kaist.ac.kr.
authors.forename: Hamid
authors.initials: H
authors.lastname: Saeed Raza
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong, Yuseong, Daejeon 305-701, Republic of Korea.
authors.forename: Hyun
authors.initials: H
authors.lastname: Jin Kim
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong, Yuseong, Daejeon 305-701, Republic of Korea.
authors.forename: Hyun
authors.initials: H
authors.lastname: Nam Kim
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong, Yuseong, Daejeon 305-701, Republic of Korea.
authors.forename: Sung
authors.initials: S
authors.lastname: Oh Cho
keywords: Angular distribution; Focal spot; MCNP; Monte Carlo; X-rays