[SPECT/CT - Technical aspects and optimization possibilities].

Area of Science:

• Medical imaging technology
• Nuclear medicine
• Radiology

Context:

• Single photon emission computed tomography/computed tomography (SPECT/CT) systems exhibit significant heterogeneity, unlike positron emission tomography/computed tomography (PET/CT).
• Gamma camera components are standardized, but CT components vary, including low-dose tubes, flat detector-based cone beam CT, and multislice-CT.
• CT data integration offers dual benefits: anatomical correlation for suspicious findings and attenuation correction for SPECT data.

Purpose:

• To explore the capabilities and challenges of current SPECT/CT systems.
• To highlight the role of CT in enhancing SPECT image quality through attenuation and scatter correction.
• To discuss the potential for improved SPECT/CT performance while managing radiation exposure.

Summary:

• SPECT/CT systems are heterogeneous, with diverse CT technologies impacting image quality and functionality.
• CT-derived data facilitates attenuation and scatter correction, improving SPECT image quality and enabling quantification.
• Iterative reconstruction algorithms leverage CT density values for advanced SPECT data correction.
• The clinical impact of attenuation-corrected whole-body SPECT/CT on scintigraphy sensitivity requires further investigation.

Impact:

• Enhanced SPECT image quality and quantitative accuracy through CT-based corrections.
• Potential for improved diagnostic performance in nuclear medicine applications.
• Emphasis on balancing diagnostic information with radiation dose reduction in SPECT/CT protocols.
• Need for further research to validate the clinical utility of advanced SPECT/CT techniques.