Practical Aspects of 18F-FDG PET When Receiving 18F-FDG from a Distant Supplier

Article Figures & Data

TABLE 2

PET/CT Scheduled and Actual Scan Numbers by Year

Year	Scheduled scan days	Actual scan days	Scheduled scans	Actual scans	Percentage of scans cancelled	¹⁸F-FDG production problems (d)	Transport problems (d)
2005–2006	134	123	755	659	12.7	13	13
2006–2007	171	155	1,049	907	13.5	18	8
2007–2008	183	153	1,249	993	20.5	37	12

TABLE 3

Reasons for PET/CT Scan Cancellations by Year

Year	Scans cancelled because of ¹⁸F-FDG production problems	Scans cancelled because of transport problems	Scans cancelled because of PET system downtime	Scans cancelled by patient
2005–2006	45	32	3	16
2006–2007	84	28	0	30
2007–2008	165	57	10	24

TABLE 4

Alternative Scanning Schedules Based on Amount of ¹⁸F-FDG Shipped (Standard Dose, 444 MBq)

Scanning schedule	Patient no.	Time slot	Injection time	Shipped activity required (GBq) to inject all patients up to and including that slot
Routine	1	12:00	12:30	3
	2	12:25	12:55	6
	3	12:50	13:20	10
	4	13:40	14:15	18
	5	14:15	14:45	25
	6	14:45	15:15	34
	7	15:20	15:50	45
	8	15:45	16:25	60
Delayed shipment to 16:00 h arrival	1	15:10	16:00	13.4
	2	15:25	16:05	28.8
	3	15:40	16:10	42.4
	4	16:15	17:00	63.6
	5	16:45	17:25	84.8
	6	17:15	18:00	106
Emergency low shipment	1	11:30	12:15	3
	2	11:50	12:20	6
	3	12:10	12:40	10
	4	12:45	13:15	15
	5	13:15	13:45	21
	6	13:45	14:15	28
	7	14:15	14:45	34
	8	14:45	15:15	45

TABLE 5

Patient Injection Calculator for 10-GBq-Activity ¹⁸F-FDG Shipment

Patient no.	Time since previous injection (min)	Injection time	Activity available (MBq)	Injected dose (MBq)	Residual activity (MBq)
1	0	13:00	10,000	444	9,556
2	15	13:15	8,694	444	8,250
3	30	13:45	6,829	444	6,385
4	60	14:45	4,375	444	3,931
5	35	15:20	3,153	444	2,709
6	35	15:55	2,173	444	1,729
7	40	16:35	1,344	444	900
8	75	17:50	561	444	117
9	30	18:20	97	444	−347

TABLE 6

Patient Injection Calculators for 5-GBq-Activity ¹⁸F-FDG Shipment

Injection schedule	Patient no.	Time since previous injection (min)	Injection time	Activity available (MBq)	Injected dose (MBq)	Residual activity (MBq)
Normal	1	0	13:00	5,000	444	4,556
	2	15	13:15	4,145	444	3,701
	3	30	13:45	3,064	444	2,620
	4	60	14:45	1,795	444	1,351
	5	35	15:20	1,084	444	640
	6	35	15:55	513	444	69
	7	40	16:35	54	444	−390
Alternative	1	0	13:00	5,000	444	4,556
	2	0	13:00	4,556	444	4,112
	3	0	13:00	4,112	444	3,668
	4	45	13:45	2,762	444	2,318
	5	35	14:20	1,860	444	1,416
	6	35	14:55	1,135	444	691
	7	40	15:35	537	444	93
	8	75	16:50	58	444	−386