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Research progress of MRI quantification in placenta accreta spectrum
NIU Zhihao  XIANG Yu  YANG Siyi  LI Shiguang 

Cite this article as: NIU Z H, XIANG Y, YANG S Y, et al. Research progress of MRI quantification in placenta accreta spectrum[J]. Chin J Magn Reson Imaging, 2026, 17(4): 206-213. DOI:10.12015/issn.1674-8034.2026.04.029.


[Abstract] Placenta accreta spectrum (PAS) is a severe perinatal complication in pregnant and puerperal women, which can lead to adverse outcomes such as massive postpartum hemorrhage and hysterectomy. Accurate prenatal diagnosis significantly reduces the incidence of PAS-related adverse outcomes. Ultrasonography (US), as the first-line screening tool for PAS, has diagnostic accuracy affected by operator experience, gestational age, placental location and other factors. Traditional qualitative magnetic resonance imaging (MRI) relies on subjective signs, and its diagnostic consistency is largely influenced by the experience of radiologists, easily resulting in missed or misdiagnosis. In recent years, MRI quantitative techniques have realized the transformation of PAS evaluation from "subjective description" to "objective quantification" by extracting objectively repeatable parameters including clinical imaging fusion indicators, texture features, diffusion coefficients and perfusion fractions. These approaches can effectively improve the diagnostic accuracy of PAS, optimize lesion classification and adverse outcome prediction. However, no consensus has been reached among various quantitative methods, which requires systematic review for sorting out. This article systematically reviews the quantitative research status of MRI quantitative scoring systems, artificial intelligence techniques (radiomics and deep learning quantitative models), and functional MRI quantitative techniques [diffusion-weighted imaging (DWI) / intravoxel incoherent motion (IVIM), blood oxygen level-dependent (BOLD) imaging, and Ferumoxytol-enhanced MRI] in PAS. It analyzes the limitations of existing studies and prospects future development directions, so as to provide references for improving the precise diagnosis and treatment system of PAS and ultimately improving maternal and infant prognosis.
[Keywords] placenta accreta spectrum；magnetic resonance imaging；quantitative scoring system；radiomics；deep learning；diffusion-weighted imaging；intravoxel incoherent motion

NIU Zhihao1   XIANG Yu1   YANG Siyi1   LI Shiguang1, 2*  

1 College of Medical Imaging, Guizhou Medical University, Guiyang 550004, China

2 Department of Imaging, the Second People's Hospital of Guiyang, Guiyang 550023, China

Corresponding author: LI S G, E-mail: imaging_shiguangli@163.com

Conflicts of interest   None.

Received  2025-12-09
Accepted  2026-04-08
DOI: 10.12015/issn.1674-8034.2026.04.029
Cite this article as: NIU Z H, XIANG Y, YANG S Y, et al. Research progress of MRI quantification in placenta accreta spectrum[J]. Chin J Magn Reson Imaging, 2026, 17(4): 206-213. DOI:10.12015/issn.1674-8034.2026.04.029.

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