Recent trends in soft-tissue infection imaging.

Area of Science:

• Medical Imaging
• Nuclear Medicine
• Radiopharmaceuticals

Background:

• Current imaging agents localize to infection and inflammation but lack specificity.
• Occult infections pose diagnostic challenges, necessitating improved imaging techniques.
• Existing methods for specific infections like inflammatory bowel disease and postoperative spine infections have limitations.

Purpose of the Study:

• To review current techniques and future directions in infection imaging.
• To highlight the advantages of (18)F-FDG-PET in infection detection.
• To discuss the need for infection-specific imaging agents.

Main Methods:

• Review of current literature on infection imaging techniques.
• Discussion of radiopharmaceuticals used in scintigraphy and positron emission tomography (PET).
• Analysis of imaging applications in respiratory, central nervous system, abdominal, and postoperative infections.

Main Results:

• (18)F-FDG-PET offers superior spatial resolution and does not rely on immune system function, making it advantageous.
• Quantitative delineation of lung inflammation is an important advancement for monitoring therapeutic response.
• (99m)Tc-ciprofloxacin SPECT shows high sensitivity for postoperative spine infections, with FDG-PET also showing promise.

Conclusions:

• Development of infection-specific imaging agents would significantly advance the detection, localization, and quantification of infections.
• PET/CT is gaining support for imaging patients with fever of unknown origin or compromised immune systems.
• SPECT/CT and PET/CT imaging of infection-specific agents will enhance clinical reliability in infection localization.