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12 Possible Causes for Heterogeneous Arterial Phase on MRI

  • Liver Neoplasm

    Lack of enhancement in the arterial and venous phases followed by marked enhancement on the delayed phase has been reported and may be a useful finding. 50 Figure 13.[] A cystic mass with an enhanced thickened wall has also been reported, which may mimic an abscess or hydatid cyst. 49 On MRI, it shows homogenous or heterogeneous hypointensity[]

  • Hepatocellular Carcinoma

    […] enhancement including areas of arterial phase enhancement which showed washout on the venous phases and areas of delayed enhancement.[] Both had enhancement heterogeneously in the arterial phase which slightly washed out in the delayed phase.[] She underwent an MRI scan (Figure 1) which showed a large (24 cm) lobulated, heterogenous mass centred in segments IVB and V with areas of restricted diffusion, and heterogenous[]

  • Fibrolamellar Hepatocellular Carcinoma

    On contrast injection with Gadolinium, the enhancement pattern is similar to CT scan with heterogeneous contrast enhancement on the arterial phase and becoming isointense[] Calcification is rarely seen on MRI.[]

  • Angiomyolipoma

    On dynamic contrast-enhanced MRI, the tumor was markedly enhanced on the whole during arterial phase (D).[] On dynamic contrast-enhanced MRI, the tumor showed heterogeneous enhancement during the arterial phase (D), as well as decreased enhancement during the portal (E) and delayed[] On dynamic contrast-enhanced MRI, the tumor showed heterogeneous enhancement in the arterial phase (C) ; besides, draining vein and hepatic vein (arrow) could also be observed[]

  • Ganglioneuroma

    Blood supply to the tumor was confirmed in the arterial phase of a CTA scan and multiplanar reconstruction (MPR) of three-dimensional images from MRI and CTA scans.[] Contrast-enhanced images confirmed the slightly heterogeneous tissue density observed on enhanced MRI.[] During the arterial phase, images showed blood vessels of the tumor originating from the posterior side of the abdominal aorta, the 11 th intercostal artery, and the branches[]

  • Hemangiosarcoma

    Currently, there are no known pathognomonic features for HAS. 33 Tumours generally display heterogenous enhancement on the late arterial phase with progressive enhancement[] […] nature of HAS is better depicted in dynamic CT and magnetic resonance imaging (MRI).[] […] another commonly reported feature in contrast-enhanced ultrasound. 31 Similarly, appearances on unenhanced computed tomography (CT) are non-specific, and the hypervascular and heterogenous[]

  • Renal Teratoma

    NECT well-defined mass with heterogeneous attenuation values due to the presence of fat and soft tissue densities maybe predominantly low-density mass arterial phase: significant[] […] enhancement in the arterial phase portal phase: becomes hypoattenuated MRI On MRI the lesion shows hyperintensity like as fatty tissue on both T1 and T2, which decreases[]

  • Myxoid Transformation of the Mitral Valve

    […] the spleen during the arterial or early portal venous phases of contrast enhancement in CT, MRI, or ultrasound imaging.[] Zebra spleen, also referred to as psychedelic spleen or more correctly inhomogeneous splenic enhancement, refers to the transient heterogeneous parenchymal enhancement of[]

  • Hepatocellular Adenoma

    Meta-analysis for the rates of low SI in the arterial-phase, PVP, and HBP of HCA in Gd-EOB-DTPA-MRI images, as well as number of lesions with bleeding, fatty degeneration,[] Two models were used to calculate odds ratios (OR) with 95% confidence intervals (CIs): random effects model and fixed effects model, were used according to heterogeneity[]

  • Splenosis

    In MRI, the splenosis nodules are hypointense in T1 and T2 and in T1 are heterogeneously enhanced early in the arterial phase after injection of gadolinium, becoming homogenous[] In CT, these nodules are hypo- or isodense relative to the liver, and have similar enhancement kinetics to that of the spleen, with heterogeneity in the arterial phase and[] In our observation, the arterial phase was not performed: it would have allowed better characterisation of the lesion.[]

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