NGHIÊN CỨU GIÁ TRỊ CỦA CỘNG HƯỞNG TỪ TUYẾN VÚ 1.5 TESLA VỚI QUY TRÌNH RÚT GỌN TRONG CHẨN ĐOÁN U TUYẾN VÚ

Abstract

Objective: To evaluate the role of the 1.5 Tesla abbreviated MRI in the diagnosis of breast cancer. Subjects and methods: The retrospective study was conducted at National Cancer Hospital from January 2019 to October 2022, on 82 patients with suspicious breast lesions, 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: In 82 patients with suspicious breast lesions, 92 lesions were detected, 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%. 02 cases were not observed on AB-MRI, accounting for 2.2%, classified as BI-RADS 3 on FD-MRI, and were benign lesions. On the other hand, comparing the ability to classify breast lesions according to BI-RADS on the AB-MRI with FD-MRI, the agreement was very good (Cohen’s Kappa index=0.866). The accuracy, sensitivity, and specificity of AB-MRI (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.