This book highlights the crucial importance of mammography in the early diagnosis of breast cancer. The first chapter explores in depth the role of mammography in breast imaging, describing the different types of mammograph used in clinical routine, including analog, semi-digital and digital mammographs. The second chapter focuses on quality control in mammography, detailing the various tests performed in clinical practice to ensure reliable and accurate results. The third and final chapter deals with the secure transfer of mammographic images, introducing a new watermarking method based on the "Least Significant Bit" (LSB) technique. This innovative method has proved its worth thanks to the results obtained, ensuring the security and integrity of images in medical settings. This book offers a comprehensive and up-to-date overview of practices and innovations in mammography imaging.