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Titolo:
Biphasic spiral CT of the liver: automatic bolus tracking or time delay?
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: 3, volume: 11, anno: 2001,
pagine: 427 - 431
SICI:
0938-7994(2001)11:3<427:BSCOTL>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASE HELICAL CT; CONTRAST-MEDIUM INJECTION; HEPATIC ARTERIAL PHASE; ENHANCED CT; TECHNOLOGY; LESIONS; RATES;
Keywords:
CT; helical CT; liver CT; bolus tracking; biphasic;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
22
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., "Biphasic spiral CT of the liver: automatic bolus tracking or time delay?", EUR RADIOL, 11(3), 2001, pp. 427-431

Abstract

The aim of this study was to evaluate the value of automatic bolus tracking for biphasic spiral CT of the liver in comparison with time delay examinations. Forty patients scheduled for a biphasic spiral CT of the liver randomly were examined either with time delay of 25 s for the arterial phase and55 s for the portal-venous phase (n = 20), or with an automatic scan starttriggered by contrast enhancement in the aorta (n = 20). Examinations wereperformed with 120 ml of contrast material and a flow rate of 4.0 ml/s. Density measurements of the aorta, of the liver parenchyma, and of the spleenwere obtained by means of regions of interest (ROI). The end of the arterial phase was considered when hepatic parenchymal enhancement was greater than 20 HU. In all patients of the group with automatic bolus tracking arterial scanning was completed in the arterial phase, of the liver. In 25% of patients with fixed time delay however, an enhancement of liver parenchyma during arterial phase greater than 20 HU was observed. During the portal-venous phase there was no significant difference in parenchymal enhancement between both groups. Automatic bolus tracking allows an individualized timing of the arterial phase in biphasic spiral CT of the liver. The timing is more accurate than in time delay scanning.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 18:28:40