Molecular imaging: current status and emerging strategies.

Area of Science:

• Medical imaging
• Biomedical engineering
• Molecular diagnostics

Background:

• In vivo molecular imaging is crucial for early disease detection, personalized medicine, and treatment monitoring.
• Current clinical methods like PET and SPECT have limitations.
• Preclinical research focuses on novel molecular targets and advanced imaging agents.

Purpose of the Study:

• To explore advanced molecular imaging strategies beyond PET and SPECT.
• To highlight the potential of ultrasound, optical, and photoacoustic imaging in clinical settings.
• To discuss the translation of preclinical findings into clinical applications.

Main Methods:

• Contrast-enhanced molecular ultrasound with targeted microbubbles.
• Optical imaging using fluorescent molecular probes.
• Raman spectroscopy/microscopy for ultrasensitive biomolecule detection.
• Photoacoustic imaging combining optical and ultrasound techniques.

Main Results:

• Molecular ultrasound, optical imaging, and Raman spectroscopy offer real-time, high-resolution, and radiation-free imaging.
• Photoacoustic imaging utilizes targeted agents for hybrid detection.
• Advances in instrumentation (endoscopes, microcatheters) facilitate clinical translation.

Conclusions:

• Emerging molecular imaging techniques show significant promise for clinical applications.
• These methods can enhance disease screening, diagnosis, and treatment monitoring.
• Continued research and technological development will accelerate clinical adoption.