Evaluation of liver masses is usually done with a combination of scans including an unenhanced scan (A) and then two postcontrast scans: one obtained quickly (hepatic-arterial phase) (B) and a second (portal-venous phase) slightly delayed (C). The combination of three scans is called a tr...
In this retrospective HIPAA–compliant study (January 2016 through May 2023), patients with biopsy-proven pancreatic adenocarcinoma and a biopsied indeterminate liver lesion underwent a DECT abdominal CT scan. Spectral HU curves were provided for each hypodense liver lesion, and slopes were calculated....
Improved visualization of hypodense liver lesions in virtual monoenergetic images from spectral detector CT: Proof of concept in a 3D-printed phantom and evaluation in 74 patientsDual energy computed tomographySpectral detector computed tomography
Purpose: To assess the influence of different dual-energy CT (DECT) scanner techniques on the severity of visceral-motion-related artifacts on the liver. Methods: Two independent readers retrospectively evaluated visceral-motion-related artifacts on the liver on 120-kVp(-like), monoenergetic low- an...
Signs on CT Hepatic steatosis is detected as diffuse or focal reduction of the liver normal density on noncontrast-enhanced scan. The normal liver density is 8 HU (Hounsfield unit) above that of the spleen (60 HU). Fatty liver density is 10 HU below spleen density on noncontrast-enhanced ...
Hemangiomas appear as low-density masses with well-defined, lobulated borders on nonenhanced CT scans. Calcification is observed in 10% to 20% of cases.5 After intravenous administration of contrast material, both arterial phase and portal venous phase CT scans show early, peripheral, globular enha...
Most PEComas were found to be of low density on CT, hypointense on T1 weighted MRI, and hyperintense on T2. Tumors typically had well-defined borders and enhanced heterogeneously on both arterial and venous phases [13]. 3.3. Primary Hepatic PEComas Primary hepatic PEComas appear to be ...
I. et al. Rat liver sinusoidal endothelial cells (LSECs) express functional low density lipoprotein receptor-related protein-1 (LRP-1). J. Hepatol. 55, 1346–1352 (2011). PubMed Google Scholar Minhajat, R. et al. Organ-specific endoglin (CD105) expression in the angiogenesis of human ...
With MR imaging, lesions are hypointense on T1-weighted images and heterogeneously hyperintense on T2-weighted images [48]. On CT scan, involvement of liver by Echinococcus granu- losus (hydatid cyst) can manifest as unilocular or multilocu- lar cysts with thin or thick walls and ...
(compared to the surrounding parenchyma) in basal CT scan, and they have no dye uptake after intravenous contrast resulting hypodense or isodense, especially during late phase. The different vascularization of the lesions, in fact, is the most important feature that can help in differentiating ...