Carboxymethyldextran-A2-Gd-DOTA enhancement patterns in the abdomen and pelvis in an animal model.

Abstract

The aim of this study was to assess MR signal enhancement patterns of carboxymethyldextran (CMD)-A2-Gd-DOTA, a new macromolecular contrast agent, in the abdomen and pelvis of New Zealand white rabbits. Nine New Zealand white rabbits underwent MRI before and following injection of 0.05 mmol/kg body weight (bw) CMD-A2-Gd-DOTA (52.1 kDa), using turbo FLASH-, dynamic FLASH 60 degrees-, T1- and T2-weighted spin-echo and turbo spin-echo sequences up to 10 days p.i. Changes in blood and tissue signal intensities (deltaSI) and relaxation rates (deltaR1) were calculated. Differences between pre- and post-contrast MRI data were compared using the Scheffé test. CMD-A2-Gd-DOTA demonstrated significant blood-pool enhancement and significant tissue enhancement on T1-weighted images, whereas no significant signal changes were observed on T2-weighted images (P < 0.05). Kidney parenchyma, pelvis and bladder demonstrated a subsequent enhancement, resembling renal elimination of the majority of the contrast agent. Liver parenchyma demonstrated a slow, delayed decay of the contrast enhancement due to storage and biodegradation of larger subfractions of the contrast agent. All tissue signal intensities were back to baseline 10 days p.i. CMD-A2-Gd-DOTA is a new macromolecular contrast agent with blood-pool effect, significant signal enhancement of abdominal organs and pelvic bone marrow, partial storage in the liver and baseline tissue signal intensities by 10 days p.i.

• Authors: H E Daldrup-Link, T M Link, H E Möller, D Wiedermann, B Bonnemain, C Corot, E J Rummeny
• Journal: European radiology (Eur Radiol) Vol. 11 Issue 7 Pg. 1276-84 ( 2001) ISSN: 0938-7994 [Print] Germany
• PMID: 11471624 (Publication Type: Comparative Study, Journal Article)

Chemical References

• Contrast Media
• Organometallic Compounds
• carboxymethyl-dextran-A2-gadolinium-DOTA

Topics

• Abdomen (anatomy & histology)
• Analysis of Variance
• Animals
• Contrast Media
• Image Enhancement (methods)
• Magnetic Resonance Imaging (methods)
• Models, Animal
• Organometallic Compounds (pharmacokinetics)
• Pelvis (anatomy & histology)
• Rabbits