Mammography or ultrasound
These methods do not replace, but complement each other, and the choice is determined primarily by age. In young women, the breast consists primarily of dense glandular tissue, which appears white on an X-ray, just like a tumor. It is difficult to distinguish between them, so up to 40 years of age, the main method is ultrasound.
With age, glandular tissue is replaced by fatty tissue, which is transparent to x-rays, and against this background, even small formations become clearly visible. That is why mammography is recommended from the age of 40 and is repeated every one to two years. Its key advantage is the identification of microcalcifications, tiny deposits of calcium salts, which may be the only sign of ductal carcinoma in situ, that is, the earliest stage, which has not yet formed a palpable node. Ultrasound practically does not see microcalcifications.
The examination takes a few minutes: the gland is placed between two plates and compressed for a short time. Compression is necessary to uniform tissue thickness and reduce radiation exposure, and it can be uncomfortable but lasts seconds. The optimal time for menstruating women is the first half of the cycle, when the breasts are less sensitive. The result is described according to the BI-RADS system, which determines further tactics: from routine routine monitoring to biopsy.
Why do you need a direction?
Formally, most studies can be completed independently, but the information content is noticeably higher when the doctor has indicated the expected diagnosis and area of interest. The diagnostic specialist knows what to pay special attention to and includes the necessary measurements in the protocol.
Without clinical context, the study becomes a bunch of numbers, some of which may look like anomalies without having any meaning for the individual patient.
Norm and deviation
Reference values reflect the performance of most healthy people, but not all. A slight deviation may be an individual characteristic, but a result within the normal range may be a significant change for someone who previously had different numbers.
Therefore, it makes sense to keep all the protocols and bring them for repeated studies: the dynamics tell the doctor much more than a single image or recording.