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Diffusion‐weighted EPI of cystic ovarian lesions: Evaluation of cystic contents using apparent diffusion coefficients
Author(s) -
Moteki Takao,
Ishizaka Hiroshi
Publication year - 2000
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/1522-2586(200012)12:6<1014::aid-jmri29>3.0.co;2-t
Subject(s) - serous cystadenoma , effective diffusion coefficient , diffusion mri , medicine , cystadenoma , cyst , ovary , pathology , cystadenocarcinoma , serous fluid , ovarian cyst , nuclear medicine , radiology , magnetic resonance imaging , ovarian cancer , pancreas , cancer
Diffusion‐weighted echoplanar imaging (EPI) was performed to evaluate the contents of cystic ovarian lesions [33 endometrial cysts, 16 ovarian cysts, 5 serous cystadenomas, 6 mucinous cystadenomas, 13 malignant cystic ovarian tumors, and 3 benign cystic lesions mimicking malignant cystic ovarian tumor (BMMs)]. Apparent diffusion coefficient (ADC) values were calculated for the cystic contents. Many lesions showed unrealistically high ADC greater than water at body temperature (0.00324 mm 2 /sec), especially in lesions more than 12 cm in diameter. The higher ADC values were attributed to the sloshing effect: intermittent compression of large ovarian lesions by abdominal breathing before the breath‐hold scan. When limited to lesions with ADC less than 0.00324 mm 2 /sec, endometrial cysts and malignant cystic ovarian tumors showed lower ADC values than ovarian cysts and serous cystadenomas ( P < 0.03). When further limited to lesions less than 12 cm in axial diameter, an additional ADC difference between malignant cystic ovarian BMMs was demonstrated ( P < 0.03). Diffusion‐weighted EPI showed the possibility that calculated ADC values might be useful in evaluating small to medium cystic ovarian lesions. J. Magn. Reson. Imaging 2000;12:1014–1019. © 2000 Wiley‐Liss, Inc.