A study on truncated cone-beam sampling strategies for 3D mammography

Junhai Wen*, Hongbing Lu, Wei Zhao, Zigang Wang, Zhengrong Liang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

In USA, breast cancer is a most frequent cause of deaths for women. It is important to detect the cancer in its early stage. X-ray three-dimensional (3D) mammography can provide a good image resolution and contrast However, the associated radiation is relative high. Reduction of the soft X-ray radiation for 3D mammography has been a research focus in the past years. In a typical 3D mammography system, the X-ray source and detector rotate around the object (breast) beneath the table, on which the patient lies in a prone position. In order to sample the data as close as possible to the chest base, a circular orbit with half cone-beam geometry has been investigated. It can provide very good reconstruction if the X-ray source is far away from the object For a relative short distance between the source and the object for an improved spatial resolution, the circular orbit may not be an optimal choice. In this case, the portion far away from the circular orbit wouldn't be well reconstructed because of the missing of projection data in that region. In this work, we investigated five possible orbits, attempting to find an optimal orbit that can reconstruct satisfactorily the whole object with least projections (less radiation). The results showed that two near half-circular orbits may be a choice, one near the chest base and the other near the breast tip. The redundant samplings beyond 180o were eliminated by our algorithm, rendering very good reconstructions.

Original languageEnglish
Article numberM14-321
Pages (from-to)3200-3204
Number of pages5
JournalIEEE Nuclear Science Symposium Conference Record
Volume5
Publication statusPublished - 2003
Externally publishedYes
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: 19 Oct 200325 Oct 2003

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