Usefulness of a Small-Field Digital Mammographic Imaging System Using Parabolic Polycapillary Optics as a Diagnostic Imaging Tool: a Preliminary Study.
10.3348/kjr.2009.10.6.604
- Author:
Kwon Su CHON
1
;
Jeong Gon PARK
;
Hyun Hwa SON
;
Sung Hoon KANG
;
Seong Hoon PARK
;
Hye won KIM
;
Hun Soo KIM
;
Kwon Ha YOON
Author Information
1. Department of Radiological Science, Catholic University of Daegu, Gyeongbuk 712-702, Korea.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Digital mammography;
Capillary optics;
Spatial resolution;
Radiation dose
- MeSH:
Equipment Design;
Humans;
Mammography/*instrumentation;
Molybdenum;
Optics and Photonics/*instrumentation;
Phantoms, Imaging;
Radiographic Image Enhancement/*instrumentation;
Rhodium
- From:Korean Journal of Radiology
2009;10(6):604-612
- CountryRepublic of Korea
- Language:English
-
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 AND METHODS: 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.
