I-45: Advance MRI Sequences in Pelvic Endometriosis

Background: To assess MRI in diagnosing endometriotic lesions, emphasizing T2*weighted imaging efficacy. Materials and Methods: This prospective study of 48 females (22-38 years, average 29.6) clinically suspected of endometriosis from September 2009 to April 2012. MRI was performed with a 1.5 T imager (Siemens) with a body array coil. T1, T2 and T2* weighted (2D-FLASH) sequences were obtained without IV contrast. Using intrarectal and intravaginal aqueous gel. All patients undergo diagnostic laparoscopy and pathologic assessment performed when was necessary. Results: 55 endometriomas and 65 endometriotric implants were detected on MRI. These lesions have various signal patterns on conventional MRI sequences. Assessment with T2*weighted sequence reveals that most of endometriotic lesions have high signal and no non-endomteriotic lesion have this pattern. With MRI using T2*weighted sequence sensitivity was 88%, specificity 100% and efficiency 91% negative ratio for low signal lesions was 8.5. Conclusion: MRI using T2*weighted imaging is a sensitive, specific and accurate method to evaluate endometriotic lesions