Avascular Necrosis of the Hip
T1-weighted images: A peripheral band of low signal is present in the superior portion of the femoral head outlining a central area of bone marrow.
T2-weighted images: The inner border of the peripheral band demonstrates high signal. This is termed the double-line sign and is pathognomonic for AVN.
Classification of the AVN lesion
Class A: Central osteonecrotic focus signal analogous to that of fat.
Class B: Central osteonecrotic focus signal analogous to that of blood.
Class C: Central osteonecrotic focus signal analogous to that of fluid.
Class D: Central osteonecrotic focus signal analogous to that of fibrous tissue
Reviewed by Sumer Sethi
on
Saturday, May 17, 2008
Rating:
Unique blend of academic excellence and entrepreneurship, heading leading firms in India- Teleradiology Providers, pioneering company providing teleradiology services and DAMS (Delhi Academy of Medical Sciences) Premier test preparation institute in India for MD/MS/MCI preparation. He has also been an invited faculty member at various conferences, including Teleradiology in IRIA 2008 and 2011, Hospital Build Middle East, Congress of the Brain Tumor Radiology in Neuro-oncology Society. Dr. Sethi is Editor-in-Chief of Internet Journal of Radiology. He has a keen interest in Web 2.0 technologies and in maintaining his famous radiology blog, which has been featured in multiple international journals.
No comments:
Post a Comment