Selective visualization of rabbit knee cartilage using MR imaging with a double-contrast agent

Area of Science:

• Biomedical Imaging
• Radiology
• Materials Science

Background:

• Accurate diagnosis of cartilage disorders is crucial for effective treatment.
• Current MR imaging methods for articular cartilage may lack sufficient contrast and selectivity.
• Development of novel contrast agents is needed to enhance diagnostic capabilities.

Purpose of the Study:

• To develop a reliable method and efficient contrast agent for selective MR imaging of articular cartilage.
• To improve the diagnosis of cartilage disorders using advanced MR techniques.

Main Methods:

• Evaluation of a trace element mixture (Mineric) as a novel MR contrast agent compared to Gd-DTPA and saline.
• Injection of agents into knee joints, followed by dissection and high-field (7.05 Tesla) MR imaging.
• Calculation of signal intensity ratios (SIRs) and T1/T2 values, alongside histological and side effect assessments.

Main Results:

• Mineric significantly increased SIRs of articular cartilage compared to Gd-DTPA and saline.
• Both Gd-DTPA and Mineric decreased T1 values of cartilage and fluid.
• Mineric significantly decreased T2 values of joint fluid, with no observed adverse effects.

Conclusions:

• A clinical trace element mixture (Mineric) functions as a novel double-contrast agent.
• Mineric demonstrates selective MR contrast enhancement in articular cartilage.
• This agent holds promise for improved diagnosis of cartilage disorders.