State of the art in total body PET

EJNMMI Physics

Table 3 Gain for different objects and axial length of total body PET systems

Axial length	Gain in single organ sensitivity vs 20 cm axial length	Gain in body sensitivity (1–2-m-long object) vs 20 cm axial length
70 cm	2.5–3.5 ×	9–10 ×
100 cm	2.5–3.5 ×	15–20 ×
140 cm	2.5–3.5 ×	20–30 ×
200 cm	2.5–3.5 ×	30–40 ×