Transient hepatic attenuation difference of lobar or segmental distribution detected by dynamic computed tomography.

Itai, Yuji; Moss, AA; Goldberg, Henry I.

doi:10.1148/radiology.144.4.6287520

Cited by 115 publications

(70 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, compensatory relationships exist between the venous and arterial inflows (23), so arterial flow increases when portal flow decreases. This occurs as a result of communications among main vessels, sinusoids, and peribiliary venules (24) that open in response to nervous and soluble factors (25). In these cases, portal flow blockade has repercussions on the entire territory downstream from the obstruction, following portal dichotomy and producing an arterial reaction strictly confined to that territory and, therefore, with a sectorial, triangular shape.…”

Section: Control Of the Intrahepatic Circulationmentioning

confidence: 99%

Anatomy and Vascular Biology of the Cells in the Portal Circulation

Pinzani

Vizzutti

Clinical Gastroenterology

View full text Add to dashboard Cite

Section: Control Of the Intrahepatic Circulationmentioning

confidence: 99%

Anatomy and Vascular Biology of the Cells in the Portal Circulation

Pinzani

Vizzutti

Clinical Gastroenterology

View full text Add to dashboard Cite

“…This phenomenon was attributed to decreased portal flow. In 1982, Itai et al [3] reported transient hepatic attenuation difference (THAD) during the HAP on CT, and explained the pathophysiology and etiology of this phenomenon. In 1984, Matsui et al [4] described segmental staining on hepatic angiograms and portal vein occlusion on portograms (a sign of intrahepatic portal vein obstruction) in liver tumor cases.…”

Section: Nomenclature and Historymentioning

confidence: 99%

Hepatic perfusion disorders: Etiopathogenesis and related diseases

Hui

Zhang²

2006

WJG

View full text Add to dashboard Cite

In this article, we have reviewed the hepatic perfusion d i s o r d e r ( H P D ) , e t i o p a t h o g e n e s i s o f H P D a n d corresponding diseases. Review of the literature was based on computer searches (PubMed, Index Medicus) and personal experiences. We considered HPD reflects perfusion differences due to redistribution of arterial blood flow among segments, subsegments and lobes of the liver. The plain CT scan findings of HPD manifests as triangular or wedge-shaped areas of low attenuation. On contrast-enhanced CT scan, HPD manifests multiple (or single) transient wedge-shaped, rotundloid or irregular appearance, homogeneous hyperattenuation (in less cases, hypoattenuation) during the hepatic arterial phase (HAP) and isoattenuated or slightly hyperattenuated areas during the portal arterial phase. Dynamic enhanced magnetic resonance (MR) features are similar to enhanced CT scan. Angiographic findings include non-opacification of portal vein on portograms or wedge-shaped segmental staining in arterial and parenchymal phases on hepatic angiograms. The causes of HPD are arterioportal shunts (APS), intrahepatic vascular compressions and portal vein occlusion, steal phenomenon by hypervascular tumors, vascular variations and any other unknown reasons. It is very important for radiologists to be familiar with the various appearances of HPD to avoid false-positive diagnosis of pseudolesions and not to overestimate the extent of the disease.

show abstract

“…Parenchymal arterialisation areas have been known for a long time as transient hepatic attenuation differences (THAD) [5,6]. However, being observed only during HAP, they were rarely seen at non-breath-hold imaging.…”

Section: Intrabiliary Metastasis From Rectal Cancer Mimicking Periphementioning

confidence: 99%

“…The hepatic parenchyma is provided with a dual blood supply, receiving 70% of blood form the portal vein and 30% from the hepatic artery. Compensatory relationships exist between the two inflows, so arterial flow increases when portal flow decreases [5]. THAD usually result from a secondary increase in arterial inflow, compensating for a reduced portal inflow (e.g.…”

Section: Intrabiliary Metastasis From Rectal Cancer Mimicking Periphementioning

confidence: 99%

Intrabiliary metastasis from rectal cancer mimicking peripheral papillary-type cholangiocarcinoma

Colagrande

Batignani

Messerini

et al. 2004

Journal of Hepatology

View full text Add to dashboard Cite

and depth. The relationship between the site characteristics and mean overall quality score were analysed by means of univariate and multiple logistic regression analysis. The probability of an 'insufficient' score was calculated in relation to the above-mentioned variables, with an odds ratio (OR) of . 1 indicating insufficient quality.The overall rating score was sufficient ($ 3) in 51% (95% CI: 38 -65%) of cases. The majority of the sites (73%) were aimed at patients rather than physicians. Commercial sponsorship was significantly more frequent among the CH sites (45%) than among the HH (15%) or CA sites (0%) ðp ¼ 0:002Þ; 61% of the commercial sites did not include a financial disclosure. Results from both univariate and multiple logistic regression analysis are given in the Table 1. Interestingly, at multivariate analysis, the only variable independently related to the poor quality was the presence of commercial sponsorship, with an odds ratio (OR) of 18.1 (95% CI: 1.7-192.5).Overall, these results indicate that the quality of hepatological web sites on the Internet is low and negatively affected by the presence of mainly undeclared commercial interests. Thus, considering that most of these sites are addressed to patients, guidelines for the certification and surveillance of web sites relating to liver diseases are warranted.

show abstract

Transient hepatic attenuation difference of lobar or segmental distribution detected by dynamic computed tomography.

Cited by 115 publications

References 0 publications

Anatomy and Vascular Biology of the Cells in the Portal Circulation

Anatomy and Vascular Biology of the Cells in the Portal Circulation

Hepatic perfusion disorders: Etiopathogenesis and related diseases

Intrabiliary metastasis from rectal cancer mimicking peripheral papillary-type cholangiocarcinoma

Contact Info

Product

Resources

About