Calculate the standardized uptake value (SUV) from a tac object, the participant's weight, and the tracer dose. These values may be in the tac object or manually supplied. The weight must be in kg, and the tracer units must be specified. The dose is converted to MBq, the tac is converted to kBq/cc, and the final SUV units are thus in g/cc. Aside from the tac object, the remaining parameters should be left NULL if the required data is in the tac object attributes (as can be done with batch_load()).
Arguments
- tac
time-activity curve object (decay-corrected)
- SUV_def
vector of start times for window for SUV weighted average, or alternatively, "max" for the maximum ROI SUV value
- dose
the injected tracer dose
- dose_unit
unit of tracer dose (e.g. "MBq", "kBq", "mCi"...)
- weight_kg
the participant's weight in kg
- ...
When called from tm_batch, unused parameters may be supplied
See also
Other SUV functions: tac_suv
Examples
f <- system.file("extdata", "AD06.tac", package="tacmagic")
fv <- system.file("extdata", "AD06_TAC.voistat", package="tacmagic")
AD06_tac <- load_tac(f, format="PMOD")
AD06_volume <- load_vol(fv, format="voistat")
AD06 <- tac_roi(tac=AD06_tac, volumes=AD06_volume, ROI_def=roi_ham_pib(),
merge=FALSE, PVC=FALSE)
# dose and weight are fabricated for the example
AD06_suvmax <- suv(AD06, "max", dose = 9.0, dose_unit = "mCi",
weight_kg = 70)
AD06_suv <- suv(AD06, c(3000, 3300, 3600), dose = 9.0, dose_unit = "mCi",
weight_kg = 70)