Review of X-ray Phase Contrast Imaging Techniques and Propagation Based Imaging Using a Benchtop Microfocal Source
- Author:
David Bradley
;
Ozcan Gnndogdu
;
Paul Jenneson
;
Eleftheria Nirgianaki
;
Elna Herawati Che Ismail
- Publication Type:Journal Article
- Keywords:
Phase, contrast, X-ray imaging
- From:Malaysian Journal of Health Sciences
2007;5(1):1-16
- CountryMalaysia
- Language:English
-
Abstract:
Currently, the basis for standard clinical X-ray radiography is absorption, tracking attenuation of radiation when X-ray beams pass through a particular
part of the body. The fundamental interaction processes are dependent on variations in the atomic number and density of the target medium;
consequentially radiographic contrast can be poor, particularly in regard to
soft tissue imaging. Over the past several years considerable interest has been
paid to utilising phase properties of the X-ray field to enhance radiographic contrast in challenging circumstances, particularly with respect to soft-tissue
imaging. Surrey is among an increasing number of institutes in which a programme of investigation of phase contrast X-ray imaging has been
established. We briefly review some basic ideas in X-ray phase contrast imaging and then examine the radiographic contrast enhancement that can be obtained,
use being made of the method of free-space propagation and investigating a number of test objects, including biological samples. The equipment used at
Surrey is relatively simple, comprising of bench-top X-ray tubes with focal spot sizes from a few microns up to 100 microns and a position sensitive 12 bit CCD
detector.
- Full text:W020150619320721021078.pdf
