def train_img_to_rss(args):
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / args.train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / args.train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__)
# Assignment inside running code appears to work.
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
arguments = vars(
args) # Placed here for backward compatibility and convenience.
args.center_fractions_train = arguments.get(
'center_fractions_train', arguments.get('center_fractions'))
args.center_fractions_val = arguments.get(
'center_fractions_val', arguments.get('center_fractions'))
args.accelerations_train = arguments.get('accelerations_train',
arguments.get('accelerations'))
args.accelerations_val = arguments.get('accelerations_val',
arguments.get('accelerations'))
if args.random_sampling:
train_mask_func = RandomMaskFunc(args.center_fractions_train,
args.accelerations_train)
val_mask_func = RandomMaskFunc(args.center_fractions_val,
args.accelerations_val)
else:
train_mask_func = UniformMaskFunc(args.center_fractions_train,
args.accelerations_train)
val_mask_func = UniformMaskFunc(args.center_fractions_val,
args.accelerations_val)
input_train_transform = PreProcessRSS(mask_func=train_mask_func,
challenge=args.challenge,
device=device,
augment_data=args.augment_data,
use_seed=False,
fat_info=args.fat_info)
input_val_transform = PreProcessRSS(mask_func=val_mask_func,
challenge=args.challenge,
device=device,
augment_data=False,
use_seed=True,
fat_info=args.fat_info)
output_train_transform = PostProcessRSS(challenge=args.challenge,
residual_rss=args.residual_rss)
output_val_transform = PostProcessRSS(challenge=args.challenge,
residual_rss=args.residual_rss)
# DataLoaders
train_loader, val_loader = create_prefetch_data_loaders(args)
losses = dict(rss_loss=SSIMLoss(filter_size=7).to(device=device))
in_chans = 16 if args.fat_info else 15
model = UNet(in_chans=in_chans,
out_chans=1,
chans=args.chans,
num_pool_layers=args.num_pool_layers,
num_res_groups=args.num_res_groups,
num_res_blocks_per_group=args.num_res_blocks_per_group,
growth_rate=args.growth_rate,
num_dense_layers=args.num_dense_layers,
use_dense_ca=args.use_dense_ca,
num_res_layers=args.num_res_layers,
res_scale=args.res_scale,
reduction=args.reduction,
thick_base=args.thick_base).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
scheduler = optim.lr_scheduler.MultiStepLR(optimizer=optimizer,
milestones=args.milestones,
gamma=args.lr_red_rate)
trainer = ModelTrainerRSS(args, model, optimizer, train_loader, val_loader,
input_train_transform, input_val_transform,
output_train_transform, output_val_transform,
losses, scheduler)
try:
trainer.train_model_concat()
except KeyboardInterrupt:
trainer.writer.close()
logger.warning('Closing summary writer due to KeyboardInterrupt.')
def train_cmg_to_img(args):
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / args.train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / args.train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__)
# Assignment inside running code appears to work.
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
if args.random_sampling:
mask_func = RandomMaskFunc(args.center_fractions, args.accelerations)
else:
mask_func = UniformMaskFunc(args.center_fractions, args.accelerations)
input_train_transform = PreProcessCMG(mask_func,
args.challenge,
device,
augment_data=args.augment_data,
use_seed=False,
crop_center=args.crop_center)
input_val_transform = PreProcessCMG(mask_func,
args.challenge,
device,
augment_data=False,
use_seed=True,
crop_center=args.crop_center)
output_train_transform = PostProcessCMG(challenge=args.challenge,
residual_acs=args.residual_acs)
output_val_transform = PostProcessCMG(challenge=args.challenge,
residual_acs=args.residual_acs)
# DataLoaders
train_loader, val_loader = create_prefetch_data_loaders(args)
losses = dict(
img_loss=LogSSIMLoss(filter_size=7).to(device)
# img_loss=SSIMLoss(filter_size=7).to(device=device)
# img_loss=nn.L1Loss()
)
# model = UNet(
# in_chans=30, out_chans=30, chans=args.chans, num_pool_layers=args.num_pool_layers, num_groups=args.num_groups,
# negative_slope=args.negative_slope, use_residual=args.use_residual, interp_mode=args.interp_mode,
# use_ca=args.use_ca, reduction=args.reduction, use_gap=args.use_gap, use_gmp=args.use_gmp).to(device)
model = UNet(in_chans=30,
out_chans=30,
chans=args.chans,
num_pool_layers=args.num_pool_layers,
num_depth_blocks=args.num_depth_blocks,
use_residual=args.use_residual,
use_ca=args.use_ca,
reduction=args.reduction,
use_gap=args.use_gap,
use_gmp=args.use_gmp).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
scheduler = optim.lr_scheduler.MultiStepLR(optimizer,
milestones=args.lr_red_epochs,
gamma=args.lr_red_rate)
trainer = ModelTrainerIMG(args, model, optimizer, train_loader, val_loader,
input_train_transform, input_val_transform,
output_train_transform, output_val_transform,
losses, scheduler)
try:
trainer.train_model()
except KeyboardInterrupt:
trainer.writer.close()
logger.warning('Closing summary writer due to KeyboardInterrupt.')
def train_complex(args):
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / args.train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / args.train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__, save_file=log_path / run_name)
# Assignment inside running code appears to work.
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
# Input transforms. These are on a per-slice basis.
# UNET architecture requires that all inputs be dividable by some power of 2.
divisor = 2**args.num_pool_layers
if args.random_sampling:
mask_func = RandomMaskFunc(args.center_fractions, args.accelerations)
else:
mask_func = UniformMaskFunc(args.center_fractions, args.accelerations)
data_prefetch = Prefetch2Device(device)
if args.train_method == 'WS2C': # Semi-k-space learning.
weight_func = SemiDistanceWeight(weight_type=args.weight_type)
input_train_transform = PreProcessWSK(mask_func,
weight_func,
args.challenge,
device,
use_seed=False,
divisor=divisor)
input_val_transform = PreProcessWSK(mask_func,
weight_func,
args.challenge,
device,
use_seed=True,
divisor=divisor)
output_transform = WeightedReplacePostProcessSemiK(
weighted=True, replace=args.replace)
elif args.train_method == 'WK2C': # k-space learning.
weight_func = TiltedDistanceWeight(weight_type=args.weight_type,
y_scale=args.y_scale)
input_train_transform = PreProcessWK(mask_func,
weight_func,
args.challenge,
device,
use_seed=False,
divisor=divisor)
input_val_transform = PreProcessWK(mask_func,
weight_func,
args.challenge,
device,
use_seed=True,
divisor=divisor)
output_transform = WeightedReplacePostProcessK(weighted=True,
replace=args.replace)
else:
raise NotImplementedError('Invalid train method!')
# DataLoaders
train_loader, val_loader = create_custom_data_loaders(
args, transform=data_prefetch)
losses = dict(cmg_loss=nn.MSELoss(reduction='mean'))
data_chans = 2 if args.challenge == 'singlecoil' else 30 # Multicoil has 15 coils with 2 for real/imag
# model = UNetModel(
# in_chans=data_chans, out_chans=data_chans, chans=args.chans, num_pool_layers=args.num_pool_layers,
# num_groups=args.num_groups, use_residual=args.use_residual, pool_type=args.pool_type, use_skip=args.use_skip,
# use_ca=args.use_ca, reduction=args.reduction, use_gap=args.use_gap, use_gmp=args.use_gmp,
# use_sa=args.use_sa, sa_kernel_size=args.sa_kernel_size, sa_dilation=args.sa_dilation, use_cap=args.use_cap,
# use_cmp=args.use_cmp).to(device)
model = UNetModelKSSE(in_chans=data_chans,
out_chans=data_chans,
chans=args.chans,
num_pool_layers=args.num_pool_layers,
num_groups=args.num_groups,
use_residual=args.use_residual,
pool_type=args.pool_type,
use_skip=args.use_skip,
min_ext_size=args.min_ext_size,
max_ext_size=args.max_ext_size,
ext_mode=args.ext_mode,
use_ca=args.use_ca,
reduction=args.reduction,
use_gap=args.use_gap,
use_gmp=args.use_gmp,
use_sa=args.use_sa,
sa_kernel_size=args.sa_kernel_size,
sa_dilation=args.sa_dilation,
use_cap=args.use_cap,
use_cmp=args.use_cmp).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
scheduler = optim.lr_scheduler.MultiStepLR(optimizer,
milestones=args.lr_red_epochs,
gamma=args.lr_red_rate)
trainer = ModelTrainerCOMPLEX(args, model, optimizer, train_loader,
val_loader, input_train_transform,
input_val_transform, output_transform,
losses, scheduler)
trainer.train_model()
def train_cmg_to_img_direct(args):
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / args.train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / args.train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__)
# Assignment inside running code appears to work.
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
# # UNET architecture requires that all inputs be dividable by some power of 2.
# divisor = 2 ** args.num_pool_layers
arguments = vars(
args) # Placed here for backward compatibility and convenience.
args.center_fractions_train = arguments.get(
'center_fractions_train', arguments.get('center_fractions'))
args.center_fractions_val = arguments.get(
'center_fractions_val', arguments.get('center_fractions'))
args.accelerations_train = arguments.get('accelerations_train',
arguments.get('accelerations'))
args.accelerations_val = arguments.get('accelerations_val',
arguments.get('accelerations'))
if args.random_sampling:
train_mask_func = RandomMaskFunc(args.center_fractions_train,
args.accelerations_train)
val_mask_func = RandomMaskFunc(args.center_fractions_val,
args.accelerations_val)
else:
train_mask_func = UniformMaskFunc(args.center_fractions_train,
args.accelerations_train)
val_mask_func = UniformMaskFunc(args.center_fractions_val,
args.accelerations_val)
input_train_transform = PreProcessCMGIMG(mask_func=train_mask_func,
challenge=args.challenge,
device=device,
augment_data=args.augment_data,
use_seed=False,
crop_center=args.crop_center)
input_val_transform = PreProcessCMGIMG(mask_func=val_mask_func,
challenge=args.challenge,
device=device,
augment_data=False,
use_seed=True,
crop_center=args.crop_center)
output_train_transform = PostProcessCMGIMG(challenge=args.challenge,
output_mode='img')
output_val_transform = PostProcessCMGIMG(challenge=args.challenge,
output_mode='img')
# DataLoaders
train_loader, val_loader = create_prefetch_data_loaders(args)
losses = dict(
# img_loss=SSIMLoss(filter_size=7).to(device=device)
# img_loss=LogSSIMLoss(filter_size=7).to(device=device)
img_loss=nn.L1Loss()
# img_loss=L1SSIMLoss(filter_size=7, l1_ratio=args.l1_ratio).to(device=device)
)
# data_chans = 1 if args.challenge == 'singlecoil' else 15
model = UNet(in_chans=45,
out_chans=15,
chans=args.chans,
num_pool_layers=args.num_pool_layers,
num_depth_blocks=args.num_depth_blocks,
res_scale=args.res_scale,
use_residual=False,
use_ca=args.use_ca,
reduction=args.reduction,
use_gap=args.use_gap,
use_gmp=args.use_gmp).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
scheduler = optim.lr_scheduler.MultiStepLR(optimizer,
milestones=args.lr_red_epochs,
gamma=args.lr_red_rate)
trainer = ModelTrainerI2I(args, model, optimizer, train_loader, val_loader,
input_train_transform, input_val_transform,
output_train_transform, output_val_transform,
losses, scheduler)
try:
trainer.train_model()
except KeyboardInterrupt:
trainer.writer.close()
logger.warning('Closing summary writer due to KeyboardInterrupt.')
def train_k2i(args):
# Maybe move this to args later.
train_method = 'W2I' # Weighted K-space to real-valued image.
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__, save_file=log_path / run_name)
# Assignment inside running code appears to work.
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
# Input transforms. These are on a per-slice basis.
# UNET architecture requires that all inputs be dividable by some power of 2.
divisor = 2**args.num_pool_layers
if args.random_sampling:
mask_func = MaskFunc(args.center_fractions, args.accelerations)
else:
mask_func = UniformMaskFunc(args.center_fractions, args.accelerations)
# This is optimized for SSD storage.
# Sending to device should be inside the input transform for optimal performance on HDD.
data_prefetch = Prefetch2Device(device)
input_train_transform = WeightedPreProcessK(mask_func,
args.challenge,
device,
use_seed=False,
divisor=divisor)
input_val_transform = WeightedPreProcessK(mask_func,
args.challenge,
device,
use_seed=True,
divisor=divisor)
# DataLoaders
train_loader, val_loader = create_custom_data_loaders(
args, transform=data_prefetch)
losses = dict(img_loss=nn.L1Loss(reduction='mean')
# img_loss=L1CSSIM7(reduction='mean', alpha=args.alpha)
)
output_transform = WeightedReplacePostProcessK()
data_chans = 2 if args.challenge == 'singlecoil' else 30 # Multicoil has 15 coils with 2 for real/imag
model = UNetSkipGN(in_chans=data_chans,
out_chans=data_chans,
chans=args.chans,
num_pool_layers=args.num_pool_layers,
num_groups=args.num_groups,
pool_type=args.pool_type,
use_skip=args.use_skip,
use_att=args.use_att,
reduction=args.reduction,
use_gap=args.use_gap,
use_gmp=args.use_gmp).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
scheduler = optim.lr_scheduler.MultiStepLR(optimizer,
milestones=args.lr_red_epochs,
gamma=args.lr_red_rate)
trainer = ModelTrainerK2I(args, model, optimizer, train_loader, val_loader,
input_train_transform, input_val_transform,
output_transform, losses, scheduler)
trainer.train_model()
def train_complex_model(args):
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / args.train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / args.train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__)
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
arguments = vars(
args) # Placed here for backward compatibility and convenience.
args.center_fractions_train = arguments.get(
'center_fractions_train', arguments.get('center_fractions'))
args.center_fractions_val = arguments.get(
'center_fractions_val', arguments.get('center_fractions'))
args.accelerations_train = arguments.get('accelerations_train',
arguments.get('accelerations'))
args.accelerations_val = arguments.get('accelerations_val',
arguments.get('accelerations'))
if args.random_sampling:
train_mask_func = RandomMaskFunc(args.center_fractions_train,
args.accelerations_train)
val_mask_func = RandomMaskFunc(args.center_fractions_val,
args.accelerations_val)
else:
train_mask_func = UniformMaskFunc(args.center_fractions_train,
args.accelerations_train)
val_mask_func = UniformMaskFunc(args.center_fractions_val,
args.accelerations_val)
divisor = 2**args.num_pool_layers
# weight_func = SemiDistanceWeight(weight_type=args.weight_type)
weight_func = None
input_train_transform = PreProcessComplexWSK(
train_mask_func,
weight_func,
args.challenge,
device,
augment_data=args.augment_data,
use_seed=False,
crop_center=args.crop_center,
crop_ud=args.crop_ud,
divisor=divisor)
input_val_transform = PreProcessComplexWSK(val_mask_func,
weight_func,
args.challenge,
device,
augment_data=False,
use_seed=True,
crop_center=args.crop_center,
crop_ud=args.crop_ud,
divisor=divisor)
output_train_transform = PostProcessComplexWSK(challenge=args.challenge,
replace=args.replace,
weighted=False)
output_val_transform = PostProcessComplexWSK(challenge=args.challenge,
replace=args.replace,
weighted=False)
# DataLoaders
train_loader, val_loader = create_prefetch_data_loaders(args)
losses = dict(img_loss=nn.MSELoss(reduction='mean'))
data_chans = 1 if args.challenge == 'singlecoil' else 15 # Multicoil has 15 coils with 2 for real/imag
model = ComplexUNet(in_chans=data_chans,
out_chans=data_chans,
chans=args.chans,
num_pool_layers=args.num_pool_layers).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
# scheduler = optim.lr_scheduler.MultiStepLR(optimizer, milestones=args.lr_red_epochs, gamma=args.lr_red_rate)
scheduler = None
trainer = ModelTrainerIMG(args, model, optimizer, train_loader, val_loader,
input_train_transform, input_val_transform,
output_train_transform, output_val_transform,
losses, scheduler)
try:
trainer.train_model()
except KeyboardInterrupt:
trainer.writer.close()
logger.warning(
f'Closing TensorBoard writer and flushing remaining outputs due to KeyboardInterrupt.'
)
def train_cmg_and_img(args):
# Creating checkpoint and logging directories, as well as the run name.
ckpt_path = Path(args.ckpt_root)
ckpt_path.mkdir(exist_ok=True)
ckpt_path = ckpt_path / args.train_method
ckpt_path.mkdir(exist_ok=True)
run_number, run_name = initialize(ckpt_path)
ckpt_path = ckpt_path / run_name
ckpt_path.mkdir(exist_ok=True)
log_path = Path(args.log_root)
log_path.mkdir(exist_ok=True)
log_path = log_path / args.train_method
log_path.mkdir(exist_ok=True)
log_path = log_path / run_name
log_path.mkdir(exist_ok=True)
logger = get_logger(name=__name__)
if (args.gpu is not None) and torch.cuda.is_available():
device = torch.device(f'cuda:{args.gpu}')
logger.info(f'Using GPU {args.gpu} for {run_name}')
else:
device = torch.device('cpu')
logger.info(f'Using CPU for {run_name}')
# Saving peripheral variables and objects in args to reduce clutter and make the structure flexible.
args.run_number = run_number
args.run_name = run_name
args.ckpt_path = ckpt_path
args.log_path = log_path
args.device = device
save_dict_as_json(vars(args), log_dir=log_path, save_name=run_name)
if args.random_sampling: # Same as in the challenge
mask_func = RandomMaskFunc(args.center_fractions, args.accelerations)
else:
mask_func = UniformMaskFunc(args.center_fractions, args.accelerations)
input_train_transform = PreProcessWSemiKCC(mask_func=mask_func,
weight_func=no_weight,
challenge=args.challenge,
device=device,
use_seed=False)
input_val_transform = PreProcessWSemiKCC(mask_func=mask_func,
weight_func=no_weight,
challenge=args.challenge,
device=device,
use_seed=True)
output_train_transform = PostProcessWSemiKCC(
args.challenge, weighted=False, residual_acs=args.residual_acs)
output_val_transform = PostProcessWSemiKCC(args.challenge,
weighted=False,
residual_acs=args.residual_acs)
# DataLoaders
train_loader, val_loader = create_prefetch_data_loaders(args)
losses = dict(
cmg_loss=nn.MSELoss(),
# img_loss=SSIMLoss(filter_size=7).to(device=device)
# img_loss=LogSSIMLoss(filter_size=7).to(device=device)
img_loss=nn.L1Loss())
data_chans = 2 if args.challenge == 'singlecoil' else 30 # Multicoil has 15 coils with 2 for real/imag
model = UNet(in_chans=data_chans,
out_chans=data_chans,
chans=args.chans,
num_pool_layers=args.num_pool_layers,
num_depth_blocks=args.num_depth_blocks,
num_groups=args.num_groups,
negative_slope=args.negative_slope,
use_residual=args.use_residual,
interp_mode=args.interp_mode,
use_ca=args.use_ca,
reduction=args.reduction,
use_gap=args.use_gap,
use_gmp=args.use_gmp).to(device)
optimizer = optim.Adam(model.parameters(), lr=args.init_lr)
scheduler = optim.lr_scheduler.MultiStepLR(optimizer,
milestones=args.lr_red_epochs,
gamma=args.lr_red_rate)
trainer = ModelTrainerCI(args, model, optimizer, train_loader, val_loader,
input_train_transform, input_val_transform,
output_train_transform, output_val_transform,
losses, scheduler)
try:
trainer.train_model()
except KeyboardInterrupt:
trainer.writer.close()
logger.warning(
f'Closing TensorBoard writer and flushing remaining outputs due to KeyboardInterrupt.'
)