ALARA	As Low As Reasonably Achievable, social and economic factors permitting
AU	Authorized user who is listed on the institution's radioactive materials license and meets the requirements stipulated by the Nuclear Regulatory Commission (NRC) or Agreement States. This is often a board‐certified radiation oncologist, a board‐certified interventional radiologist, or a board‐certified nuclear medicine physician.
Bq	Becquerel
BSA	Body surface area
CBCT	Cone Beam Computed Tomography ‐ an imaging technique employing divergent x‐rays with a flat‐panel detector for three‐dimensional reconstruction akin to computed tomography (CT). Whenever specified in this report, multidetector CT would also suffice.
CFR	Code of Federal Regulations
Child‐Pugh score	The Child‐Pugh score is a system for assessing the prognosis — including the required strength of treatment and necessity of liver transplant — of chronic liver disease, primarily cirrhosis.
CHP	Certified Health Physicist as recognized by the American Board of Health Physics
Ci	Curie
DVH	Dose‐volume histogram
FMEA	Failure mode and effect analysis
HCC	Hepatocellular carcinoma
IR	Interventional radiology
LSF	Lung shunt fraction
MAA	Macroaggregated albumin
MPPG	Medical Physics Practice Guideline
NCCN	National Comprehensive Cancer Network
NRC	Nuclear Regulatory Commission
PET	Positron Emission Tomography
QMP	Qualified medical physicist properly trained to support Yttrium‐90 (90Y) treatment as defined in AAPM position statement PS 7‐A. For 90Y treatments, certification in any of the specialties listed in PS 7‐A are appropriate to serve as a QMP. While QMPs are required for dosimetry calculations, day of treatment radiation safety support may be provided by appropriately trained certified health physicists or radiation safety staff.
RAM	Radioactive Materials
REILD	Radioembolization‐induced liver disease
ROI	Region of Interest
S value	Mean absorbed dose per cumulated activity. S values depend on the radionuclide, source organ, target organ, and geometry inherent from the selection of the age and gender of phantom selected.
SIRT	Selective internal radiation therapy
SPECT	Single photon emission computed tomography
TARE	Transarterial radioembolization
TNR [T/N]	Tumor to normal tissue ratio of the liver
WD	Written Directive