Dual-Phase Helical CT Using Bolus Triggering Technique: Optimization of Transition Time
Journal of the Korean Radiological Society
;
: 101-107, 1999.
Artículo
en Coreano
| WPRIM
| ID: wpr-100979
ABSTRACT
PURPOSE:
To optimize the transition time between the triggering point in monitoring scanning and theinitia-tion of diagnostic hepatic arterial phase (HAP) scanning in hepatic spiral CT, using a bolus triggeringtechnique. MATERIALS ANDMETHODS:
One hundred consecutive patients with focal hepatic lesion were included inthis study. Patients were randomized into two groups. Transition times of 7 and 11 seconds were used in group 1and 2, respectively. In all patients, bolus triggered HAP spiral CT was obtained using a semi-automatic bolustracking program after the injection of 120 mL of non-ionic contrast media at a rate of 3 mL/sec. When aorticenhancement reached 90 HU, diagnostic HAP scanning began after a given transition time. From images of group 1 andgroup 2, the degree of parenchymal enhancement of the liver and tumor-to-liver attenuation dif-ference weremeasured. Also, for qualitative analysis, conspicuity of the hepatic artery and hypervascular tumor was scored andanalyzed.RESULTS:
Hepatic parenchymal enhancement on HAP was 12.07+/-6.44 HU in group 1 and 16.03+/-5.80 HU ingroup 2 (p .05). In the evaluationof conspicuity of hepatic artery, there was no statistically significant difference between the two groups(p>.05). The conspicuity of hypervascular tumors in group 2 was higher than in group 1 (p<.05).CONCLUSION:
HAPspiral CT using a bolus triggering technique with a transition time of 11 seconds provides better HAP images thanwhen the transition time is 7 seconds.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Medios de Contraste
/
Tomografía Computarizada Espiral
/
Arteria Hepática
/
Hígado
Tipo de estudio:
Ensayo Clínico Controlado
/
Investigación cualitativa
Límite:
Humanos
Idioma:
Coreano
Revista:
Journal of the Korean Radiological Society
Año:
1999
Tipo del documento:
Artículo
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