TY - JOUR
T1 - Changes of the normal ovary during menstrual cycle in reproductive age on the diffusion-weighted image
AU - Morisawa, Nobuko
AU - Kido, Aki
AU - Koyama, Takashi
AU - Okada, Tomohisa
AU - Kataoka, Masako
AU - Umeoka, Shigeaki
AU - Fujimoto, Koji
AU - Tamai, Ken
AU - Togashi, Kaori
PY - 2012
Y1 - 2012
N2 - Objective: The objective of this study was to investigate changes in magnetic resonance findings of the normal ovary during menstrual cycle on diffusion-weighted image (DWI). Methods: Magnetic resonance imaging was performed in 9 healthy females at the menstrual, periovulatory, and luteal phases using a 1.5-T unit. Signal intensity (SI) of the ovary on DWI with a b value of 1000 s/mm2 was visually scored. The ovary-to-muscle contrast ratios on DWI and apparent diffusion coefficient (ADC) values were also evaluated. Results: All the ovaries were identified, and higher SI than the nerve root was identified in 70% (38/54) of the ovaries, although visual scores did not show significant difference among menstrual phases. The mean ADC values (10-3 mm2/s) were 1.71 (SD, 0.27), 1.71 (SD, 0.22), and 1.67 (SD, 0.19) in menstrual, periovulatory, and luteal phases, respectively. No phase-dependent change was observed in contrast ratios and ADC values. Conclusion: The normal ovary in fertile period shows high SI enough to be identified on DWI, and observed values are independent of the menstrual cycle.
AB - Objective: The objective of this study was to investigate changes in magnetic resonance findings of the normal ovary during menstrual cycle on diffusion-weighted image (DWI). Methods: Magnetic resonance imaging was performed in 9 healthy females at the menstrual, periovulatory, and luteal phases using a 1.5-T unit. Signal intensity (SI) of the ovary on DWI with a b value of 1000 s/mm2 was visually scored. The ovary-to-muscle contrast ratios on DWI and apparent diffusion coefficient (ADC) values were also evaluated. Results: All the ovaries were identified, and higher SI than the nerve root was identified in 70% (38/54) of the ovaries, although visual scores did not show significant difference among menstrual phases. The mean ADC values (10-3 mm2/s) were 1.71 (SD, 0.27), 1.71 (SD, 0.22), and 1.67 (SD, 0.19) in menstrual, periovulatory, and luteal phases, respectively. No phase-dependent change was observed in contrast ratios and ADC values. Conclusion: The normal ovary in fertile period shows high SI enough to be identified on DWI, and observed values are independent of the menstrual cycle.
KW - ADC
KW - diffusion
KW - menstrual change
KW - normal ovary
UR - http://www.scopus.com/inward/record.url?scp=84861517961&partnerID=8YFLogxK
U2 - 10.1097/RCT.0b013e318255aebf
DO - 10.1097/RCT.0b013e318255aebf
M3 - 学術論文
C2 - 22592617
AN - SCOPUS:84861517961
SN - 0363-8715
VL - 36
SP - 319
EP - 322
JO - Journal of Computer Assisted Tomography
JF - Journal of Computer Assisted Tomography
IS - 3
ER -