RESULTS OF ABBREVIATED MAGNETIC RESONANCE IMAGING (AMRI) COMPARED WITH MAGNETIC RESONANCE IMAGING (MRI) ON 92 LESIONS WITH SUSPICIOUS BREAST CANCER AT K HOSPITAL

Hồng Khoa Phạm, Đức Hữu Dương

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Abstract

Objective: To evaluate the role of the 1.5 Tesla Abbreviated Magnetic Resonance Imaging (AMRI) in the diagnosis the lessions of breast cancer. Subjects and methods: The retrospective study was conducted at K Hospital from June 2020 to June 2022, on 92 lessions with suspicious breast cancer, undergoing 1.5 Tesla MRI with 02 protocols: full and abbreviated protocol (integrated), with histopathological results after needle biopsy and/or surgery. The abbreviated protocol performed in the study included axial STIR and axial T1FS sequences before injection, 1 minute, and 2 minutes after injection. MRI images were classified into 2 groups: full and abbreviated protocol, encrypted and blinded patient information. Results were independently evaluated by two experienced radiologists. The imaging, pathologic features, and value of the two methods were analyzed. Results: With 92 suspicious lesions of the breast cancer were detected in 82 patients , of which 51 cases were cancer and 41 cases were benign lesions. The lesion detection rate of the abbreviated MRI(AB-MRI) compared with full diagnostic MRI(FD-MRI) was 97.8%. There are Two cases were not observed on AMRI, accounting for 2.2%, classified as BI-RADS 3 on MRI, and were benign lesions. On the other hand, comparing the ability to classify breast lesions according to BI-RADS on the MRI with MRI, the agreement was very good (Cohen’s Kappa index=0.866). The accuracy, sensitivity, and specificity of AMRI (BIRADS≥4) in the diagnosis of breast cancer were 81.5%, 100%, and 55.8%, respectively. Conclusion: Abbreviated MRI is a precious method in the diagnosis of breast cancer, with sensitivity and accuracy equivalent to full diagnostic MRI.

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References

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