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Research and Reports in Gynecology and Obstetrics | Volume 3
November 14-15, 2019 | Singapore
Obstetrics and Gynecology
4th International Conference on
Usefulness of subtraction pelvic MRI in patients with ovarian endometrioma
Hyun Jung Lee and Ji Sun Lee
Kyungpook National University Hospital, South Korea
To minimize damage of ovarian reserve, it is necessary
to evaluate the follicular density in ovarian tissue
surrounding the cyst in preoperative image of patients with
ovarian endometrioma. Purpose of presented study was to
evaluate the usefulness of subtraction pelvic MRI of ovarian
endometrioma. A subtracted T1 weighted image (T1-WI)
was performed by subtract T1-WI from contrast enhanced
T1-WI with exact similarity in all parameters between
both sequences of 22 patients with surgically confirmed
ovarian endometrioma. To evaluate comparability with
normal ovarian tissue, signal to noise ratio (SNR) of ovarian
endometrioma whichwere classified into high signal intensity
group and iso-to-low signal intensity group on T2 weighted
image were compared with those of normal ovarian tissue.
To evaluate effect of contrast enhancement, standardization
map was obtained by dividing subtracted T1-WI by contrast
enhanced T1-WI. Visual assessment classified 22 patients
with ovarian endometrioma into 16 patients with high signal
intensity and 6 patients with iso-to-low signal intensity on
T1-WI. Although the SNR of endometrioma with high signal
intensity was higher than that with iso-to-low signal intensity,
there is no difference of SNR after subtraction (13.72 ± 77.55
versus 63.03 ± 43.90, p=0.126). As the area of affected ovary
was smaller than normal ovary, (121.10 ± 22.48 versus 380.51
± 75.87mm2, p<0.001), however, the mean of pixel number
of viable remaining tissue in affected ovary by endometriosis
was similar to that of normal ovary (0.53 ± 0.09 versus 0.47±
0.09 p=0.682). Subtraction technique of pelvic MRI could
be useful to evaluate the extent of endometrial invasion to
normal ovarian tissue and viable remnant ovarian tissue.
e:
Res Rep Gynaecol Obstet, Volume:3
DOI: 10.35841/2591-7366-C3-009