Table A1. An explanation of the acronyms that appears in this article.

Abbreviation	Explanation
D-UNET	Inclusion of Dense networks to the UNET structure
AG-UNET	Inclusion of Attention gate module to the UNET structure
DA-UNET	Inclusion of both dense networks and attention gate module to the UNET structure
IDA-UNET	Inclusion of Improved dilation convolution and Attention Gate module to the UNET structure
DID-UNET	Inclusion of dense networks and improved dilation convolution to the UNET structure
ADID-UNET	Inclusion of dense networks, Improved dilation convolution and Attention Gate modules to the UNET structure