MR Imaging for Ectopic Pregnancy.

Area of Science:

• Radiology
• Obstetrics & Gynecology
• Medical Imaging

Background:

• Ectopic pregnancy (EP) diagnosis typically involves serum β-human chorionic gonadotropin (hCG) levels and transvaginal ultrasound (US).
• MR imaging is not a first-line diagnostic tool for EP but offers advantages when US findings are indeterminate.
• The rising incidence of heterotopic pregnancies, often linked to assisted reproductive technology, increases the relevance of advanced imaging techniques.

Purpose of the Study:

• To illustrate the diverse appearances of ectopic pregnancy and related conditions on both US and MR imaging.
• To emphasize the complementary roles of US and MR imaging in diagnosing EP.
• To highlight the expanding utility of MR imaging in managing complex pregnancies.

Main Methods:

• Review of US and MR imaging findings in confirmed cases of ectopic pregnancy.
• Correlation of imaging features with clinical presentations and diagnostic markers (e.g., serum β-hCG).
• Pictorial essay format presenting characteristic imaging manifestations.

Main Results:

• Transvaginal US is the primary imaging modality for suspected EP.
• MR imaging provides superior soft-tissue contrast resolution and a wide scanning range, beneficial for complex cases.
• Accurate localization of implantation using MR imaging facilitates treatment planning, including minimally invasive options like laparoscopy.

Conclusions:

• Integrated interpretation of clinical data, US, and MR imaging is crucial for accurate EP diagnosis.
• MR imaging plays a vital role in evaluating indeterminate US findings and guiding management strategies.
• Familiarity with imaging features of EP and associated conditions improves diagnostic accuracy and patient outcomes.