Total-Body PET: Maximizing Sensitivity to Create New Opportunities for Clinical Research and Patient Care

Area of Science:

• Medical Imaging
• Nuclear Medicine
• Physiology

Background:

• Positron Emission Tomography (PET) is a sensitive non-invasive imaging technique for studying human physiology and metabolism.
• Current PET limitations include low signal-to-noise ratio, long scan times, and radiation dose concerns, restricting its utility.
• Two key developments promise to enhance PET's effective sensitivity.

Purpose of the Study:

• To explore the benefits of increased geometric coverage in PET imaging.
• To introduce the development of the world's first total-body PET/CT scanner.
• To project the impact of enhanced timing resolution and total-body PET on future applications.

Main Methods:

• Expanding detector coverage to encompass the entire body.
• Developing a first-generation total-body PET/CT scanner.
• Investigating advancements in timing resolution for improved time-of-flight (TOF) PET.

Main Results:

• Increased geometric coverage can enhance sensitivity by factors of 4-5 (organ) to 40 (total-body).
• Total-body PET/CT scanners are under construction to demonstrate step-change sensitivity improvements.
• Combined total-body coverage and improved timing resolution could yield sensitivity gains exceeding two orders of magnitude.

Conclusions:

• Total-body PET imaging offers substantial sensitivity gains, revolutionizing clinical research and patient care.
• Future advancements in timing resolution will further amplify PET sensitivity, especially when integrated with total-body systems.
• These advancements promise to overcome current PET limitations, expanding its diagnostic and research capabilities.