New York Society for the Ruptured and Crippled Maintaining the Hospital for Special Surgery;Medical College of Wisconsin
发明人:
Kevin Matthew Koch,Matthew F. Koff,Hollis Potter
申请号：
US15494191
公开号：
US10638949B2
申请日:
2017.04.21
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A method includes: accessing MRI data acquired from a joint area, the MRI data including a series of spatially mapped spectral data points； generating MRI images of the joint area； receiving information encoding a region of interest that encompasses a suspected metal particle deposition area over at least one of the MRI images； constructing magnetic field maps using the MRI data, each representing off-resonance frequency shifts over the joint area； removing a background of off-resonance field inhomogeneity from the magnetic field map such that the region of interest is free from off-resonance field inhomogeneity； identifying clusters from the magnetic field maps with the background of off-resonance field inhomogeneity removed, the clusters defined over a first dimension of offset frequencies and a second dimension of cluster volumes； and computing a quantitative metric by combining information from the identified clusters according to both the first dimension and the second dimension.
