Computed tomography of the heart.

Area of Science:

• Veterinary Radiology
• Medical Imaging
• Cardiology

Background:

• Cardiac imaging is crucial for diagnosing heart conditions.
• Computed tomography (CT) and positron emission tomography (PETT) are advanced imaging modalities.

Purpose of the Study:

• To evaluate the diagnostic utility of transmission CT and emission PETT for cardiac visualization in dogs.
• To assess the ability of these techniques to identify and quantify myocardial infarction.

Main Methods:

• Transmission CT scans of canine chests (dead and live) were acquired using an EMI body scanner.
• Positron emission transverse tomograph (PETT) imaging was performed on live dogs post-infarction after C-palmitate administration.
• Contrast material was used with CT to enhance cardiac morphology visualization.

Main Results:

• Transmission CT provided detailed cardiac morphology and identified infarcts as regions of lower x-ray attenuation.
• PETT imaging allowed for the assessment of relative infarct size in live dogs.
• Both modalities demonstrated potential for cardiac evaluation.

Conclusions:

• Transmission CT is useful for visualizing cardiac structure and infarcts.
• PETT imaging, particularly with radiotracers like C-palmitate, can assess infarct size.
• The study discusses the comparative advantages of transmission and emission tomography for cardiac imaging.