18F-FDG gallbladder uptake: observation from a total-body PET/CT scanner

BMC Medical Imaging

Table 1 Details of Study Subgroups and Imaging Protocols

Characteristic	Healthy			Lymphoma
Characteristic	Standard dose	Low dose	Standard dose^a	Lymphoma
Participants	15	15	18	25
Injected dose (MBq)
Mean ± SD (min–Max)	372 ± 17 (337–394)	20 ± 2 (17–24)	353 ± 37 (228–395)	292 ± 37 (197–328)
Number of scanning timepoints	6	3	3	2
1-h Dynamic scanning	Yes	Yes	Yes	No
Scan timepoints after injection (min) ^b	40, 90, 180	40, 90, 180	40, 90, 120	60, 120 ^c
CT tube current for each scan (mAs)	5, 50, 5, 5, 5, 5	5, 50, 5	5, 50, 5	50, 5

^aHealthy participants from racial/ethnic minority population
^bImages at the 40-min timepoint in healthy subgroups were extracted from a dynamic 60-min scan (i.e., the last 20 min were reconstructed)
^cOne out of the 25 patients was scanned at 90 and 120 min

ISSN: 1471-2342