CDFI blood flow signal grading was determined by Adler’s method: Grade 0, no blood flow signal was found in the mass: Grade I, a small amount of blood flow, with one to two punctate or thin rod-shaped tumor vessels; Grade II, a moderate amount of blood flow, with three to four punctate vessels or a longer vessel penetrating the lesion, whose length may approach or exceed the radius of the mass; Grade III, a large amount of blood flow, with ≥ five punctate vessels or two longer vessels. vessels. Imaging significance: grade 0 to Ⅰ were judged as benign lesions, and grade II to Ⅲ were judged as malignant lesions. The flow velocity profile was observed with pulsed Doppler, and the maximum systolic flow velocity (Vp) and resistance index (RI) were measured. Then the RTE mode was switched to RTE mode again, and a special probe was used to perform a pressurization and decompression operation to obtain elastography images for exploration. The elastography score 5-point method [1] was used for evaluation. Scoring criteria: purple (level 1), blue (level 2), green (level 3), yellow (level 4) and red (level 5). Imaging significance: ≥4 points were diagnosed as malignant lesions and ≤3 points were diagnosed as benign lesions.