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Usefulness of a small-field digital mammographic imaging system using parabolic polycapillary optics as a diagnostic imaging tool: a preliminary study.

Chon KS, Park JG, Son HH, Kang SH, Park SH, Kim HW, Kim HS, Yoon KH - Korean J Radiol (2009 Nov-Dec)

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiological Science, Catholic University of Daegu, Gyeongbuk 712-702, Korea.

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-microm thickness. With a thicker molybdenum filter (100 microm 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-microm 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.

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Related in: MedlinePlus

Radiation dose for molybdenum (Mo) and rhodium (Rh) filters with 25 µm thickness at fixed tube voltage (A) and current (B).
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Figure 4: Radiation dose for molybdenum (Mo) and rhodium (Rh) filters with 25 µm thickness at fixed tube voltage (A) and current (B).

Mentions: Figure 4 shows the radiation dose using rhodium filters of 25-µm thickness for an acrylic phantom with a 44 mm thickness (Mammographic Accreditation Phantom, CIRS, VA), equivalent to a 42 mm compressed breast with 50% glandular tissue and 50% adipose tissue, as a function of the tube current and fixed voltage for molybdenum. The radiation dose increased as the tube current increased at a fixed tube voltage. The radiation dose, as a function of the voltage at a fixed current, increased quadratically.


Usefulness of a small-field digital mammographic imaging system using parabolic polycapillary optics as a diagnostic imaging tool: a preliminary study.

Chon KS, Park JG, Son HH, Kang SH, Park SH, Kim HW, Kim HS, Yoon KH - Korean J Radiol (2009 Nov-Dec)

Radiation dose for molybdenum (Mo) and rhodium (Rh) filters with 25 µm thickness at fixed tube voltage (A) and current (B).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2770826&req=5

Figure 4: Radiation dose for molybdenum (Mo) and rhodium (Rh) filters with 25 µm thickness at fixed tube voltage (A) and current (B).
Mentions: Figure 4 shows the radiation dose using rhodium filters of 25-µm thickness for an acrylic phantom with a 44 mm thickness (Mammographic Accreditation Phantom, CIRS, VA), equivalent to a 42 mm compressed breast with 50% glandular tissue and 50% adipose tissue, as a function of the tube current and fixed voltage for molybdenum. The radiation dose increased as the tube current increased at a fixed tube voltage. The radiation dose, as a function of the voltage at a fixed current, increased quadratically.

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiological Science, Catholic University of Daegu, Gyeongbuk 712-702, Korea.

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-microm thickness. With a thicker molybdenum filter (100 microm 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-microm 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.

Show MeSH
Related in: MedlinePlus