Transient hepatic intensity difference
Citation, DOI, disclosures and article data
At the time the article was created Yuranga Weerakkody had no recorded disclosures.
View Yuranga Weerakkody's current disclosuresAt the time the article was last revised Yoshi Yu had no financial relationships to ineligible companies to disclose.
View Yoshi Yu's current disclosures- Transient hepatic intensity differences (THID)
- THID
- Transient hepatic intensity difference (THID)
- THIDs
Transient hepatic intensity differences (THID) is a phenomenon observed on MRI imaging of the liver. They are considered a direct equivalent to transient hepatic attenuation differences (THAD) seen with CT and transient hepatic echogenicity differences (THED) with CEUS. They may be focal or non-focal.
Pathology
Focal THIDs
A focal THID can arise from four pathological mechanisms
directly by a siphoning effect (lobar multisegmental shape)
indirectly by means of portal hypoperfusion (sectorial shape) due to portal branch compression or infiltration
by thrombosis resulting in a portal branch blockade
by flow diversion caused by an arterioportal shunt
Non-focal THIDs
These can be sectorial, polymorphous or diffuse and can arise from a variety of etiologies.
References
- 1. Colagrande S, Centi N, Galdiero R et-al. Transient hepatic intensity differences: part 1, Those associated with focal lesions. AJR Am J Roentgenol. 2007;188 (1): 154-9. doi:10.2214/AJR.05.1368 - Pubmed citation
- 2. Colagrande S, Centi N, Galdiero R et-al. Transient hepatic intensity differences: part 2, Those not associated with focal lesions. AJR Am J Roentgenol. 2007;188 (1): 160-6. doi:10.2214/AJR.05.1367 - Pubmed citation
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