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Deliver-MPI: Diffusion Embedded-Physics Model for Magnetic Particle Imaging Reconstruction under Strong Liver Background

  • Ziwei Chen
  • , Wenxuan Zou
  • , Gen Shi
  • , Jian'an Ye
  • , Ning Sun
  • , Zhongwei Bian
  • , Yu An*
  • , Jie Tian*
  • *Corresponding author for this work
  • Beihang University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Magnetic Particle Imaging (MPI) is an emerging, radiationfree modality for quantitatively mapping superparamagnetic tracer concentration, yet liver uptake often overwhelms nearby tumor signals. We propose a physics-constrained diffusion reconstruction that injects the system matrix into a pre-trained diffusion prior, alternating denoising with a onestep data-consistency update and null-space conditioning. Without changing hardware or tracers, the method enforces physical fidelity while preserving fine structures. On simulated and measured liver-tumor phantoms, it reduces artifacts and more reliably recovers small lesions adjacent to strong liver signals compared with traditional reconstructions.

Original languageEnglish
Title of host publicationISBI 2026 - 23rd IEEE International Symposium on Biomedical Imaging
PublisherIEEE Computer Society
ISBN (Electronic)9798331577636
DOIs
StatePublished - 2026
Event23rd IEEE International Symposium on Biomedical Imaging, ISBI 2026 - London, United Kingdom
Duration: 8 Apr 202611 Apr 2026

Publication series

NameProceedings - International Symposium on Biomedical Imaging
Volume2026-April
ISSN (Print)1945-7928
ISSN (Electronic)1945-8452

Conference

Conference23rd IEEE International Symposium on Biomedical Imaging, ISBI 2026
Country/TerritoryUnited Kingdom
CityLondon
Period8/04/2611/04/26

Keywords

  • diffusion model
  • liver interference
  • Magnetic particle imaging

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