Usefulness of a Small-Field Digital Mammographic Imaging System Using Parabolic Polycapillary Optics as a Diagnostic Imaging Tool: a Preliminary Study
Korean Journal of Radiology
;
: 604-612, 2009.
Article
in English
| WPRIM
| ID: wpr-123976
ABSTRACT
OBJECTIVE:
To evaluate the efficacy for spatial resolution and radiation dose of a small-field digital mammographic imaging system using parabolic polycapillary optics. MATERIALS ANDMETHODS:
We developed a small-field digital mammographic imaging system composed of a CCD (charge coupled device) detector and an X-ray source coupled with parabolic polycapillary optics. The spatial resolution and radiation dose according to various filters were evaluated for a small-field digital mammographic imaging system. The images of a test standard phantom and breast cancer tissue sample were obtained.RESULTS:
The small-field digital mammographic imaging system had spatial resolutions of 12 lp/mm with molybdenum and rhodium filters with a 25-micrometer thickness. With a thicker molybdenum filter (100 micrometer thick), the system had a higher spatial resolution of 11 lp/mm and contrast of 0.48. The radiation dose for a rhodium filter with a 25-micrometer thickness was 0.13 mGy within a 10-mm-diameter local field. A larger field image greater than 10 mm in diameter could be obtained by scanning an object. On the small-field mammographic imaging system, microcalcifications of breast cancer tissue were clearly observed.CONCLUSION:
A small-field digital mammographic imaging system with parabolic polycapillary optics may be a useful diagnostic tool for providing high-resolution imaging with a low radiation dose for examination of local volumes of breast tissue.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Rhodium
/
Mammography
/
Radiographic Image Enhancement
/
Phantoms, Imaging
/
Equipment Design
/
Optics and Photonics
/
Molybdenum
Type of study:
Diagnostic study
Limits:
Humans
Language:
English
Journal:
Korean Journal of Radiology
Year:
2009
Type:
Article
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