This atlas illustrates various breast pathologies detected in chest CT scans incidentally or non-incidentally, along with their dedicated breast imaging (mammogram, ultrasound, and MRI) correlation. Due to the enhanced quality of chest CT images, patients are now frequently referred to breast imaging departments after incidental findings in the breast are detected during chest CT scans. While some cases do not require referral, others could benefit from more precise and confident reporting. In some instances, the chest CT can even serve a similar purpose to breast MRI. Although a few articles have been published on this topic, no explicit book has been published. Reviewing an atlas enables radiologists, particularly those who have not had the opportunity to encounter breast lesions in chest CT scans during their training, to quickly comprehend what they can expect to see and how to approach these lesions. The text includes cases divided by benign breast lesions, malignant breast lesions, post-surgical lesions, implants, and more. This is an ideal guide for breast and thoracic radiologists, radiology residents, and fellows.