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  4. Single-portal-phase low-tube-voltage dual-energy CT for short-term follow-up of acute pancreatitis: Evaluation of CT severity index, interobserver agreement and radiation dose
 
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2014
Journal Article
Titel

Single-portal-phase low-tube-voltage dual-energy CT for short-term follow-up of acute pancreatitis: Evaluation of CT severity index, interobserver agreement and radiation dose

Abstract
Objectives To intra-individually compare single-portal-phase low-tube-voltage (100-kVp) computed tomography (CT) with 120-kVp images for short-term follow-up assessment of CT severity index (CTSI) of acute pancreatitis, interobserver agreement and radiation dose. Methods We retrospectively analysed 66 patients with acute pancreatitis who underwent initial dual-contrast-phase CT (unenhanced, arterial, portal phase) at admission and short-term (mean interval 11.4 days) follow-up dual-contrast-phase dual-energy CT. The 100-kVp and linearly blended images representing 120-kVp acquisition follow-up CT images were independently evaluated by three radiologists using a modified CTSI assessing pancreatic inflammation, necrosis and extrapancreatic complications. Scores were compared with paired t test and interobserver agreement was evaluated using intraclass correlation coefficients (ICC). Results Mean CTSI scores on unenhanced, portal- and dual-contrast-phase images were 4.9, 6 .1 and 6.2 (120 kVp) and 5.0, 6.0 and 6.1 (100 kVp), respectively. Contrast-enhanced series showed a higher CTSI compared to unenhanced images (P < 0.05) but no significant differences between single- and dual-contrast-phase series (P > 0.7). CTSI scores were comparable for 100-kVp and 120-kVp images (P > 0.05). Interobserver agreement was substantial for all evaluated series and subcategories (ICC 0.67-0.93). DLP of single-portal-phase 100-kVp images was reduced by 41 % compared to 120-kVp images (363.8 versus 615.9 mGy cm). Conclusions Low-tube-voltage single-phase 100-kVp CT provides sufficient information for follow-up evaluation of acute pancreatitis and significantly reduces radiation exposure.
Author(s)
Wichmann, Julian L.
Universitätsklinikum Frankfurt
Majenka, Pavel
Universitätsklinikum Frankfurt
Beeres, Martin
Universitätsklinikum Frankfurt
Kromen, Wolfgang
Universitätsklinikum Frankfurt
Schulz, Boris
Universitätsklinikum Frankfurt
Wesarg, Stefan
Fraunhofer-Institut für Graphische Datenverarbeitung IGD
Bauer, Ralf W.
Universitätsklinikum Frankfurt
Kerl, J. Matthias
Universitätsklinikum Frankfurt
Gruber-Rouh, Tatjana
Universitätsklinikum Frankfurt
Hammerstingl, Renate
Universitätsklinikum Frankfurt
Vogl, Thomas J.
Universitätsklinikum Frankfurt
Lehnert, Thomas
Universitätsklinikum Frankfurt
Zeitschrift
European radiology
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DOI
10.1007/s00330-014-3300-0
Language
English
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Fraunhofer-Institut für Graphische Datenverarbeitung IGD
Tags
  • computed tomography (...

  • evaluation

  • monitoring

  • Business Field: Visua...

  • Research Line: Comput...

  • Research Line: Human ...

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