Work

Finite detector based projection model for high spatial resolution

Year: 2012

Type: article

Abstract: For finite detector and focal spot sizes, here we propose a projection model for high spatial resolution. First, for a given x-ray source point, a projection datum is modeled as an area integral over a narrow fan-beam connecting the detector elemental borders and the x-ray source point. Then, the final projection value is expressed as the integral obtained in the first step over the whole focal spot support. An ordered-subset simultaneous algebraic reconstruction technique (OS-SART) is developed using the proposed projection model. In the numerical simulation, our method produces improved spatial resolution and suppresses high-frequency artifacts.

Source: Journal of X-Ray Science and Technology

DOI: 10.3233/xst-2012-0331

Authors: Hengyong Yu, Ge Wang

Institutions: Virginia Tech - Wake Forest University School of Biomedical Engineering & Sciences, Wake Forest University Health Sciences, Wake Forest University, Virginia Tech

Language: English

Topic: Medical Imaging Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: green