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Related Concept Videos

Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...

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T2-hypointense adnexal lesions: an imaging algorithm.

Alla Khashper1, Helen C Addley, Nesreen Abourokbah

  • 1Department of Radiology, McGill University Health Center, 1650 Cedar Ave, Suite C5 118, Montreal, QC, Canada H3G 1A4. khashper@yahoo.com

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|July 13, 2012
PubMed
Summary
This summary is machine-generated.

Magnetic resonance (MR) imaging uses T2-weighted sequences to characterize adnexal lesions. Low signal intensity on T2-weighted images can indicate benign or malignant conditions, guiding diagnosis and patient management.

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Area of Science:

  • Radiology
  • Oncology
  • Gynecologic Imaging

Background:

  • T2-weighted sequences are crucial for characterizing adnexal lesions in magnetic resonance (MR) imaging.
  • A subset of adnexal lesions exhibits low signal intensity on T2-weighted images, posing diagnostic challenges.

Purpose of the Study:

  • To propose a diagnostic algorithm for interpreting T2-hypointense adnexal lesions.
  • To enhance the accurate characterization of adnexal lesions using MR imaging features.

Main Methods:

  • Interpreting T2-weighted signal intensity in relation to pathologic correlates (blood products, smooth muscle, fibrous tissue, calcification, cellularity).
  • Analyzing lesion signal intensity relative to skeletal muscle.
  • Integrating findings from additional pulse sequences, T1-weighted imaging, and enhancement characteristics.

Main Results:

  • Lesions as dark as skeletal muscle on T2-weighted images are typically benign.
  • Lesions brighter than skeletal muscle represent a heterogeneous group including benign, borderline, and malignant entities.
  • A diagnostic algorithm incorporating multiple MR imaging features aids interpretation.

Conclusions:

  • Accurate characterization of T2-hypointense adnexal lesions is achievable through a systematic approach.
  • Integrating T2-weighted signal intensity, pathologic correlates, and other MR sequences improves diagnostic accuracy.
  • Knowledge of anatomy, T1-weighted features, and enhancement patterns is essential for appropriate patient management.