Saeed Raza H, Jin Kim H, Nam Kim H, Oh Cho S. Angle dependent focal spot size of a conical X-ray target.
Appl Radiat Isot 2014;
96:6-12. [PMID:
25474766 DOI:
10.1016/j.apradiso.2014.10.008]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 10/10/2014] [Accepted: 10/10/2014] [Indexed: 10/24/2022]
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.
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