Ad CycleGAN	adaptive cycle-consistent generative adversarial network
AI	artificial intelligence
ARDS	acute respiratory distress syndrome
CGAN	conditional GAN
COVID-19	Coronavirus disease 2019
Cycle GAN	Cycle-consistent generative adversarial network
CT	computed tomography
CXR	chest X-ray
DNN	deep neural network
FID	Frechet inception distance
GAN	generative adversarial network
HVS	human visual system
LUS	lung ultrasound
MR	magnetic resonance
MSE	mean squared error
NSS	natural scene statistics
PET	positron emission tomography
PSNR	peak signal-to-noise ratio
RMSE	root mean squared error
RT-PCR	real-time reverse-transcriptase polymerase chain reaction
UIQI	universal image quality index
VIF	visual information fidelity
WGAN	Wasserstein GAN