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Osteoarthritis Cartilage. 2009 Sep;17(9):1193-6. doi: 10.1016/j.joca.2009.03.005. Epub 2009 Mar 24.

Phase-sensitive X-ray imaging of synovial joints.

Author information

1
Department of Biochemistry, Rush University Medical Center, Chicago, IL 60612, USA.

Abstract

OBJECTIVE:

To test the efficacy of phase-sensitive X-ray imaging for intact synovial joints, whereby refraction effects, along with the attenuation of conventional radiography, can be exploited.

DESIGN:

Intact cadaveric human knee joints were imaged, in the computed tomographic mode, using an analyzer-based X-ray system at the National Synchrotron Light Source, Brookhaven National Laboratory. A collimated fan beam of 51 keV X-rays was prepared by a silicon [1,1,1 reflection] double-crystal monochromator. The X-ray beam transmitted through the specimen was imaged after diffraction in the vertical plane by means of the analyzer crystal with the analyzer crystal tuned to its half-reflectivity point (6.5 microrad). A two-dimensional filtered backprojection (FBP) algorithm was used for reconstructing transverse slices of images.

RESULTS:

The resulting images demonstrate simultaneous soft tissue and bone contrast at a level that has not been achieved previously. Identifiable structures include articular cartilage, cruciate ligaments, loose connective tissue, menisci, and chondrocalcinosis.

CONCLUSION:

Phase-sensitive X-ray imaging using an analyzer-based system renders exceptionally high quality images of soft and hard tissues within synovial joints, with high contrast and resolution, and thus holds promise for the eventual clinical utility.

PMID:
19328880
PMCID:
PMC2730993
DOI:
10.1016/j.joca.2009.03.005
[Indexed for MEDLINE]
Free PMC Article
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