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Cystic ovarian lesions in SSFP diffusion imaging
Yasushi Kaji1, Michimasa Matsuo, Mitsuru Matsuki
1Division of MR imaging, Department of Radiology, Tenri Hospital, Kobe University School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan. ykaji@med.kobe-u.ac.jp
Summary
Steady-state free precession diffusion imaging helps analyze ovarian cystic lesions. This method, using diffusion-related coefficient (DRC) and rADC(L)/rADC(F) ratios, effectively differentiates cyst contents.
Area of Science:
- Radiology
- Medical Imaging
- Oncology
Background:
- Ovarian cystic lesions are typically assessed using MRI based on morphology, signal intensity, and contrast enhancement.
- Current methods may not always definitively characterize the contents of ovarian cysts.
Purpose of the Study:
- To evaluate the utility of steady-state free precession (SSFP) diffusion imaging for analyzing the contents of ovarian cystic lesions.
- To determine if SSFP diffusion imaging can provide additional diagnostic information beyond conventional MRI techniques.
Main Methods:
- Sixty-one ovarian cystic lesions in 37 patients were analyzed.
- Diffusion-related coefficient (DRC) and the ratio of relative apparent diffusion coefficient of the lesion to subcutaneous fat tissue (rADC(L)/rADC(F)) were calculated from SSFP diffusion images.
Main Results:
- Significantly lower DRCs and rADC(L)/rADC(F) ratios were observed in endometrial cysts and the fatty components of dermoid cysts compared to other cystic tumors.
- These quantitative diffusion parameters demonstrated potential in differentiating specific types of cystic contents.
Conclusions:
- SSFP diffusion imaging is a valuable addition to clinical practice for evaluating ovarian cystic lesions due to its short scan time.
- The calculated DRC and rADC(L)/rADC(F) ratios are effective metrics for assessing the nature of cystic contents in ovarian lesions.