Variations in slice sensitivity profile for various height settings in tomosynthesis imaging: Phantom study

Taku Kuramoto, Junji Morishita, Toyoyuki Kato, Yasuhiko Nakamura

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Understanding the properties of slice sensitivity profile (SSP), or slice thickness, is crucial for an accurate and highly reproducible diagnosis using tomosynthesis imaging. The objectives of the present study are therefore to quantitatively evaluate how the SSP with the use of a small metal bead is affected by different settings of the height from the table and the height of the center of rotation (COR) in tomosynthesis imaging except for the digital breast tomosynthesis, and visually verify the effects on tomosynthesis images. The reconstruction filters used were three types of filtered back-projection and iterative reconstructions. The SSP was measured from the full width at half maximum (FWHM-SSP) of the profile curve of the bead in the perpendicular direction (z direction) relative to the table. Two types of anthropomorphic phantoms simulating the human body, with bones and soft tissues, were used to study the effects of different settings for the COR height. In all reconstruction filters, the FWHM-SSP changed as the height of the bead varied when the bead and COR were set to the same height from the table. If the bead and the COR were set to different heights, the FWHM-SSP increased (decreased) when the height of the bead was set to be greater (less) than the height of the COR. These changes were also confirmed on the anthropomorphic phantom images of the bones and soft tissues.

本文言語英語
ページ(範囲)108-117
ページ数10
ジャーナルPhysica Medica
53
DOI
出版ステータス出版済み - 9 2018

All Science Journal Classification (ASJC) codes

  • 生物理学
  • 放射線学、核医学およびイメージング
  • 物理学および天文学(全般)

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