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Phase-sensitive X-ray imaging of synovial joints.

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.

journal_name

Osteoarthritis Cartilage

journal_title

Osteoarthritis and cartilage

authors

Li J,Zhong Z,Connor D,Mollenhauer J,Muehleman C

doi

10.1016/j.joca.2009.03.005

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

1193-6

issue

9

eissn

1063-4584

issn

1522-9653

pii

S1063-4584(09)00075-2

journal_volume

17

pub_type

杂志文章

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