EJNMMI Physics

Table 1 EARL1 and EARL2 RC limits. *At the time of this work, RC_max for total-body scanners was under investigation. ** RC_peak limits were under revision. Table

From: EARL compliance measurements on the biograph vision Quadra PET/CT system with a long axial field of view

NEMA IEC phantom spheres			¹⁸F standard 1 RC limits		¹⁸F standard 2 RC limits
Sphere i	Diameter (mm)	Volume (mL)	RC_max	RC_mean	RC_max*	RC_mean	RC_peak**
1	37	26.52	0.95–1.16	0.76–0.89	1.05–1.29	0.85–1.00	0.90–1.10
2	28	11.49	0.91–1.13	0.72–0.85	1.01–1.26	0.82–0.97	0.90–1.10
3	22	5.57	0.83–1.09	0.63–0.78	1.01–1.32	0.80–0.99	0.90–1.10
4	17	2.57	0.73–1.01	0.57–0.73	1.00–1.38	0.76–0.97	0.75–0.99
5	13	1.15	0.59–0.85	0.44–0.60	0.85–1.22	0.63–0.86	0.45–0.70
6	10	0.52	0.34–0.57	0.27–0.43	0.52–0.88	0.39–0.61	0.27–0.41

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