Medizinische Universität Graz - Research portal
Selected Publication:
Sandstede, JJW; Tschammler, A; Beer, M; Vogelsang, C; Wittenberg, G; Hahn, D.
Optimization of automatic bolus tracking for timing of the arterial phase of helical liver CT
Eur Radiol. 2001; 11(8):1396-1400
Doi: 10.1007/s003300000816
Web of Science
PubMed
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- Co-authors Med Uni Graz
- Beer Meinrad
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- Abstract:
- The aim of this study was to optimize bolus tracking for timing of the arterial phase of biphasic helical liver CT and to compare optimized bolus tracking to a standard delay. One hundred fifty patients were examined with six protocols: 5- or 10-s delay after triggering at a threshold of 50 or 75 or 100 HU enhancement in the aorta at the origin of the celiac arteries after injection of 120 ml contrast material at 3 ml/s. Optimal arterial enhancement was defined as 20-30% of hepatic enhancement in portal venous phase. Another 50 patients were examined with the optimized protocol and compared to 50 gender- and age-matched patients who underwent a 25-s standard delay. A 10-s delay after the 75-HU threshold resulted in the most patients with an optimal arterial phase (p < 0.01). Thirty-one of 75 patients examined with this protocol showed optimal early liver enhancement. Bolus tracking compared with standard delay revealed only a trend for a difference (p = 0.07). The outcome of automatic bolus tracking differs depending on the protocol used; however, optimal arterial phase imaging was seen in only 41% of patients, indicating only a trend for superior timing compared with a standard delay.
- Find related publications in this database (using NLM MeSH Indexing)
- Adolescent -
- Adult -
- Aged -
- Aged, 80 and over -
- Aorta, Abdominal - radiography
- Contrast Media - administration and dosage
- Female -
- Humans -
- Injections, Intravenous - methods
- Liver - blood supply Liver - radiography
- Male -
- Middle Aged -
- Portal Vein - radiography
- Renal Artery - radiography
- Retrospective Studies -
- Spleen - radiography
- Time Factors -
- Tomography, X-Ray Computed - methods
- Find related publications in this database (Keywords)
- CT
- contrast media
- liver