Janet Dipietro

Publication Detail

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Magnetic resonance signal characteristics of the cervix as pregnancy advances.

Jason A Pates; Nicole P Yost; Qian Oliver; Donald D McIntire; Diane M Twickler (Profiled Author: Qian Oliver)

Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center at Dallas, TX 75235-9032, USA. jason.pates@utsouthwestern.edu
Reproductive sciences (Thousand Oaks, Calif.) 2007;14(5):440-4.

The objective of this study is to describe magnetic resonance (MR) signal intensity (SI) changes in the cervix during pregnancy. This is an observational cohort study of women with a history of preterm delivery. MR imaging sequences were performed every 3 to 4 weeks. Using 8 regions of interest, the SIs are quantified and analyzed with respect to gestational age. Twenty-seven MR studies were performed on a cohort of 8 women. The SIs of the external os are significantly greater than those of the internal os ( P = .035). Similarly, the SIs of the outer stroma are greater than those of the inner stroma (P = .002). As gestational age advances, the inner to outer stromal SI ratio increases, primarily because of a decreasing SI in the outer stromal layer (P = .03). The MR SIs of the cervical stromal zones display variability during pregnancy and decrease with advancing gestation.

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