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[Differentiation between benign and malignant breast lesions using fat-suppressed dynamic MR imaging]
T Koshiishi1, I Isomoto, K Nakamura
1Department of Radiology, Saga National Hospital.
Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|September 24, 1998
Summary
Fat-suppressed dynamic MR imaging can help differentiate breast lesions. The contrast enhancement ratio (CER) at 45 seconds is a key indicator for distinguishing malignant from benign conditions.
Area of Science:
- Radiology
- Medical Imaging
- Oncology
Background:
- Accurate differentiation between benign and malignant breast lesions is crucial for appropriate patient management.
- Dynamic Magnetic Resonance Imaging (MR imaging) offers functional information that may aid in lesion characterization.
Purpose of the Study:
- To evaluate the utility and challenges of fat-suppressed dynamic MR imaging in distinguishing benign from malignant breast lesions.
- To determine the optimal imaging parameters for lesion differentiation.
Main Methods:
- Twenty-nine patients with lesions requiring surgical intervention underwent fat-suppressed dynamic MR imaging using a 0.5 T magnet.
- Pre- and postcontrast 3D-spoiled gradient echo sequences with fat suppression were utilized.
- Contrast-to-noise ratio (CNR) and contrast enhancement ratio (CER) were calculated at various contrast determination times (CDT).
Main Results:
- No statistically significant difference in CNR was observed between malignant and benign lesions.
- A highly significant difference in CER was found between malignant and benign disease at 45 seconds CDT (P = .006).
- However, significant overlap in CER time-intensity curves was noted after 45 seconds CDT.
Conclusions:
- Comparison of CNR is not effective for differentiating malignant from benign breast lesions using dynamic MR imaging.
- CER evaluated at approximately 45 seconds CDT is a valuable parameter for the differential diagnosis of breast lesions.