[Retracted] Analysis of the Mechanism of Breast Metastasis Based on Image Recognition and Ultrasound Diagnosis

Table 1

Ultrasound classification of small breast cancer.

Type	Feature
Nodular type	Nodules with the largest diameter of the lesion ≦1 cm
Mass type	The maximum diameter of the lesion >1 cm, ≦2 cm; according to the boundary of the lesion, it can be divided into the following: Type I (clear boundary type): the boundary of the lesion is clear, but there is no obvious envelope; Type II (rough edge type): the edge of the lesion is blurred, showing small burr-like shape, partly with angle sign
Capsule type	The lesion was a mixed nodule with cysts and solids
Catheter type	The catheter is tortuous and dilated, and the lesions are distributed along the inner wall of the dilated catheter
Diffuse type	The lesion showed a hypoechoic area with unclear borders and no obvious nodular echo