2024年4月27日 · 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 …

2024年8月28日 · transient hepatic intensity differences (THID): the equivalent MRI finding. transient hepatic echogenicity differences (THED): the equivalent CEUS finding

2016年11月16日 · • Transient hepatic intensity difference (THID) Definitions • Transient increase in hepatic attenuation (or intensity) during arterial phase CT (or MR) due to regional variations in balance between hepatic arterial and portal venous blood flow

2012年11月23日 · Today hepatic arterial phase evaluation may also be easily performed on MRI, on which perfusion alterations can also be observed; we call these “transient hepatic signal intensity differences” (THID).

Transient hepatic intensity difference (THID) on MR . Etiology. Vascular compromise (portal vein, hepatic artery, hepatic vein) Arterioportal shunting; Effect from hypervascular tumors (“steal”/siphon”/”sump” effect) Local inflammatory changes (abscess, acute cholecystitis, cholangitis) Cirrhosis; Aberrant blood supply

2012年11月23日 · Transient hepatic intensity differences without a focal lesion may have three appearances: sectorial, which is triangular areas with a straight border that follows portal dichotomy; polymorphous, having various shapes and extension, usually without a straight border that does not follow portal dichotomy; and diffuse, having a varied appearance, which is the …

An abscess and a THAD (white arrow) on a contrast CT in native, arterial, portal and delayed phase. [1] [predatory publisher]Transient hepatic attenuation differences (THAD) are areas of enhancement during the arterial phase of contrast CT of the liver. THAD is thought to be a physiological phenomenon resulting from regional variation in the blood supply by the portal …

2016年1月10日 · A transient hepatic attenuation difference (THAD) or transient hepatic intensity difference (THID) is seen during biphasic liver computed tomography (CT) or magnetic resonance imaging (MRI). It refers to an area of nontumorous increased or decreased attenuation on arterial phase images, which becomes isoattenuating on portal-phase images.

2009年10月1日 · THID in the lateral segment of the left lobe of the liver due to metastatic breast cancer. Note that in this instance, the apex of the THID is rounded due to the mass rather than tapering to a point. Download: Download high-res image (128KB) Download: Download full-size image; Figure 8.

2009年10月1日 · To understand why we observe THIDs and THADS, it is helpful to review the pharmacodynamics of normal liver contrast enhancement. During the arterial phase, iodinated contrast reaching the liver via the hepatic artery is diluted approximately 3:1 in the sinusoids by the as yet unopacified portal venous blood so that overall liver parenchymal enhancement is …