• La Radiologia medica · Apr 1993

    [Dynamic sequential study of hepatic nodular lesions with ultra-fast sequences and fast bolus of gadolinium-DTPA].

    • A Villa, G Moro, E Genovese, P Caprotti, R Campani, C van Steenwinkel, and L Sammarchi.
    • Istituto di Radiologia, I.R.C.C.S. Policlinico S. Matteo, Università di Pavia.
    • Radiol Med. 1993 Apr 1; 85 (4): 352-63.

    AbstractEighty-five patients with single/multiple nodular hepatic lesions (10 focal nodular hyperplasias, 37 liver hemangiomas, 24 metastases and 16 hepatocellular carcinomas; 2 patients had associated lesions) were examined with dynamic single-slice sequences and fast i.v. bolus injection of Gd-DTPA. The dynamic single-slice technique was used to evaluate the peculiar features of the dynamic enhancement. The snapshot sequence proved best to provide the high temporal resolution of the dynamic parenchymal enhancement (scanning time < 1 second, one frame every third second). The following variables were investigated: nodular lesion intensity in the first basal snapshot image, enhancement appearance and its contemporaneity with arterial, venous or portal flows, enhancement gradient relative to surrounding liver parenchyma, morphologic features of the enhancement and its centrifugal/centripetal patterns. The enhancement curve of focal nodular hyperplasia increased very quickly during the first 20-25 seconds. This enhancement was quite similar to the arterial one and always occurred before portal and systemic venous times. Hemangiomas exhibited a typically slow growth-curve in the first 120 seconds, with a positive final gradient value relative to liver parenchyma. The appearance of peripheral contrast enhancement was a typical sign after 30 seconds. Metastases exhibited similar dynamic enhancement to hemangiomas, but peripheral enhancement was never observed and, after 120 seconds, gradient was null or negative relative to the adjacent liver parenchyma. Moreover, enhancement always followed portal times. Hepatocellular carcinomas showed an early growth curve, preceding portal times, but less marked than in hyperplasia. The study of our series provided the preliminary semiology of early dynamic enhancement patterns, which is quite specific to recognize and differentiate nodular hepatic lesions.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…