Intravenous contrast media application using cone-beam computed tomography in a rabbit model

Area of Science:

• Medical Imaging
• Radiology
• Veterinary Medicine

Background:

• Cone-beam computed tomography (CBCT) is an imaging technique.
• Evaluating soft tissue lesions and vascular structures requires advanced imaging methods.

Purpose of the Study:

• To assess the feasibility of using contrast-enhanced cone-beam computed tomography (CE-CBCT) for visualizing soft tissue lesions and vascular structures.
• To determine optimal contrast medium administration parameters for CE-CBCT in an animal model.

Main Methods:

• Six rabbits underwent CBCT after intravenous contrast medium administration.
• Artificial soft tissue lesions were created by transplanting autologous fatty tissue.
• Volume rendering, maximum intensity projection, and multiplanar reconstructions were used for image evaluation.

Main Results:

• Contrast enhancement of soft tissues was achieved with various parameters.
• An optimal contrast administration involved a 5-mL pre-injection followed by a continuous 5-mL during scanning.
• CE-CBCT images showed adequate opacification and delineation of soft tissues, vascular structures, and artificial lesions.

Conclusions:

• CE-CBCT successfully visualized artificial soft tissue lesions and vascular structures in rabbits.
• The technique provided sufficient contrast for delineating lesions against surrounding tissues.
• CE-CBCT's superior spatial resolution may offer advantages over other CT techniques for visualizing these structures.