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Titolo:
Automatic bolus tracking in monophasic spiral CT of the liver: liver-to-lesion conspicuity
Autore:
Mehnert, F; Pereira, PL; Trubenbach, J; Kopp, AF; Claussen, CD;
Indirizzi:
Univ Tubingen, Dept Diagnost Radiol, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 Radiol, D-72076 Tubingen, Germany
Titolo Testata:
EUROPEAN RADIOLOGY
fascicolo: 4, volume: 11, anno: 2001,
pagine: 580 - 584
SICI:
0938-7994(2001)11:4<580:ABTIMS>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONTRAST-MEDIUM INJECTION; PHASE HELICAL CT; HEPATIC CT; ENHANCED CT; TIME; TECHNOLOGY; DELAYS; RATES;
Keywords:
helical CT; liver lesions; monophasic bolus tracking;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Mehnert, F Univ Tubingen, Dept Diagnost Radiol, Hoppe Seyler Str 3, D-72076 Tubingen,Germany Univ Tubingen Hoppe Seyler Str 3 Tubingen Germany D-72076 many
Citazione:
F. Mehnert et al., "Automatic bolus tracking in monophasic spiral CT of the liver: liver-to-lesion conspicuity", EUR RADIOL, 11(4), 2001, pp. 580-584

Abstract

The aim of this study was to evaluate the value of automatic bolus tracking for monophasic spiral CT of the liver and to assess the Liver-to-lesion conspicuity in comparison with time-delay examinations. In 40 patients scheduled for therapy control of known hypovascular hepatic metastases a monophasic spiral CT was completed either with time delay of 65 s (n = 20) or withautomatic bolus tracking in the liver parenchyma (n = 20). Examinations were performed with 120 mi of contrast material and a flow rate of 3.0 ml/s. For automatic bolus tracking a parenchymal enhancement threshold of 40 HU was used. Contrast enhancement in the liver parenchyma and in liver lesions was obtained by means of regions of interest (ROI). Mean parenchymal enhancement was not significantly different between time delay and bolus-trackinggroup. In 4 of 20 patients in the bolus-tracking group the threshold levelof 40 HU was not reached. With automatic bolus tracking a significantly higher liver-to-lesion density difference was observed (P < 0.0001). Automatic bolus tracking allows a better liver-to-lesion conspicuity in monophasic spiral CT. Contrary to recent studies, a significantly higher parenchymal enhancement was not found using automatic bolus tracking.

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Documento generato il 24/01/20 alle ore 13:06:19