Optimization of scan delay for routine abdominal 64-slice CT with body weight-adapted application of contrast material
| Autor: | F. Beyer, Boris Buerke, A. Tschugunow, J. Weßling, Harald Seifarth, K. U. Juergens, Michael Puesken, Walter Heindel |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Adult
Male medicine.medical_specialty Aortography Time Factors media_common.quotation_subject Contrast Media Hepatic Veins Body weight Inferior vena cava Drug Administration Schedule Young Adult Double-Blind Method Celiac Artery medicine.artery medicine Image Processing Computer-Assisted Contrast (vision) Humans Radiology Nuclear Medicine and imaging Pancreas media_common Aged Neoplasm Staging Aged 80 and over Aorta medicine.diagnostic_test Dose-Response Relationship Drug business.industry Portal Vein Body Weight Middle Aged Image Enhancement Iopamidol medicine.anatomical_structure medicine.vein Liver Abdominal Neoplasms Injections Intravenous Abdomen Female Tomography Radiology business Tomography Spiral Computed Spleen |
| Zdroj: | RoFo : Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin. 181(7) |
| ISSN: | 1438-9010 |
| Popis: | Purpose Determination of an adequate scan delay for routine abdominal 64-slice CT examinations with body weight-adapted contrast application. Materials and methods 57 patients underwent abdominal CT with a 64-slice scanner. The contrast material was adapted to patient body weight. All patients were randomized into five groups with varying scan delay and scan direction (group 1: delay 65 sec; group 2: 75 sec; group 3: 85 sec, craniocaudal; group 4: 85 sec, caudocranial; group 5: 95 sec). Two blinded radiologists evaluated the image quality. CT values (HU) were obtained in different segments of the aorta, inferior vena cava, iliac veins, portal vein, hepatic veins and liver, spleen and pancreas. Statistical analysis was performed using the independent sample t-test and ANOVA test. Results The diagnostic acceptability of protocols 3 and 4 were rated equally good and significantly/substantially superior to protocol 1 (p = 0.004/0.008) and protocol 5, respectively. Contrast enhancement in the aorta and portal vein peaked at 65 sec. Contrast enhancement in the hepatic and iliac veins peaked at 85 sec independently of the scan direction but was substantially lower at 75 sec. Liver parenchyma enhancement was lowest at 95 sec. Conclusion This data suggests an optimal scan delay for routine abdominal 64-slice CT of 85 sec regardless of scan direction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|