18F-FDG
18F-fluorodeoxyglucose
AAA
Abdominal Aortic Aneurysm
A
ankle
ABI
ankle-brachial index
ACA
anterior cerebral artery
ACAS
asymptomatic carotid atherosclerosis trial
ACD
advanced care directives
ACE
angiotensin-converting enzyme
ACR
american college of radiology
ACT
activated clotting time
ADC
analog to digital converter
ADH
antidiuretic hormone
ADP
adenosine diphosphate
AE
adverse events
AECD
automatic external cardioverter-defibrillator
AF
atrial fibrillation
AFB
acid-fast bacilli
AFP
a-fetoprotein
AGIH
acute gastrointestinal hemorrhage
AK
above knee
ALS
amyotrophic lateral sclerosis
AMI
acute mesenteric ischemia
AML
angiomyolipoma
Ao
aorta