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Why would I need both ultrasound and MRI?

Topic:Diagnosis
Affected areas:pelvicabdominalbowel

Ultrasound and MRI often complement each other because they highlight different findings in different ways. Ultrasound is a great first-line tool for identifying ovarian cysts (including endometriomas) and can sometimes suggest deeper endometriosis depending on where it is and who performs the scan.


MRI provides a broader, more detailed map of the pelvis and can help clarify the location and extent of disease—especially when we’re assessing deeper areas or planning surgery. When both are recommended, it’s usually to reduce uncertainty, better match imaging with your symptoms, and help our team plan the most informed next step—whether that’s continued evaluation or a surgical consultation.

An illustration of a female standing next to a female doctor with an ultrasound machine between them.

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Dr. Steven Vasilev delivers best-in-class endometriosis guidance and a personalized treatment plan—built on evidence and your unique biology.


Led by Steven Vasilev, MD—an internationally recognized endometriosis specialist & MIGS surgeon—Lotus Endometriosis Institute is virtual-forward, with many patients traveling nationally for care. Clinical evaluation and surgical treatment are provided in California.

Santa Monica, CA

2121 Santa Monica Blvd, Santa Monica, CA 90404

Operating Hours

8:00 am - 5:00 pm
Monday - Friday

Arroyo Grande, CA

154 Traffic Way, Arroyo Grande, CA 93420