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Abstract #5092

Preoperative differentiation of spinal multiple myeloma and osteolytic metastasis using diffusion-weighted imaging–based habitat

Xu Jun1, Xie Lizhi2, and Ning Lang1
1Peking Third Hospital, Beijing, China, 2GE Healthcare MR Research, Beijing, China

Synopsis

Keywords: Diagnosis/Prediction, DWI/DTI/DKI

Motivation: Multiple myeloma (MM) and osteolytic metastases (OM) are difficult to distinguish due to similar radiographic features and clinical symptoms, yet they require different treatments.

Goal(s): Develop a non-invasive, preoperative method to differentiate MM from OM using diffusion-weighted imaging (DWI) habitat imaging.

Approach: Study involved MM and OM patients undergoing multi-b DWI exams. Tumors were segmented into three habitats based on diffusion coefficient and mean kurtosis coefficient. Logistic regression identified risk factors, and nomogram models were developed.

Results: Habitat 3 fraction was higher in MM, and habitat 2 fraction was lower, both significant predictors. The nomogram model showed the highest diagnostic accuracy.

Impact: DWI-based habitat imaging shows clinical potential for noninvasively and preoperatively differentiating between spine MM and OM.

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Keywords