Color Doppler ultrasound (color ultrasound) is widely used in clinical applications, as follows: Cranial arteries (sclerosis, inadequate blood supply, stenosis spasm, typical cranial vascular malformations) Carotid arteries, extremity arteries (stenosis sclerosis, stenosis rate estimation, IMT, plaque) Ocular and ocular vascular diseases (ocular axis, cataract, vitreous opacity, posterior vitreous detachment, ocular tumors, foreign bodies, central retinal arteries and ophthalmic arteries, blood supply) Diseases of the maxillofacial region (mumps, parotid tumors, soft tissue tumors) Diseases of the thyroid and parathyroid glands (simple enlargement, nodular enlargement, benign and malignant tumors, hyperfunction, hypofunction, Hashimoto’s disease, acute and subacute inflammation) Diseases of the superficial lymph nodes of the neck, axilla, and groin (inflammatory reactions, metastases, benign and malignant lymphomas) Diseases of the breast (hyperplasia, benign and malignant tumors, inflammation) Heart disease (arrhythmia, heart valve disease, cardiomyopathy, high heart or pulmonary heart or coronary heart disease heart manifestations, congenital heart disease, heart tumor, abnormal heart function, pericardial effusion) Thoracic disease (effusion, tumor, lung tumor in effusion state and pulmonary atelectasis) Liver disease (hepatic hypo, chronic liver loss, polycystic liver, fatty liver, cirrhosis and portal hypertension signs, benign and malignant tumor of liver, portal vein thrombosis and cancer embolism, liver Biliary diseases (cholecystitis, biliary polyps, adenomyosis, cholesterolosis, gallbladder and intra- and extra-hepatic bile duct stones, biliary obstruction, gallbladder and bile duct cancer) Splenic diseases (congenital splenic agenesis, para-spleen, wandering spleen, splenomegaly, splenic hypoplasia, splenic benign and malignant tumors, polycystic spleen, splenic hematoma, splenic abscess, hypersplenism, splenic atrophy, splenic infarction) Pancreatic diseases (acute and chronic pancreatitis, pseudocysts, benign and malignant tumors) (acute and chronic pancreatitis, pseudocysts, benign and malignant tumors, pancreatic duct obstruction, pancreatic stones) Gastrointestinal diseases (superficial or atrophic gastritis, gastric ulcer, gastric prolapse, gastric retention, benign and malignant gastrointestinal tumors, pyloric stenosis, duodenal congestion, intestinal obstruction, intussusception, acute appendicitis, gastrointestinal perforation) Adrenal diseases (pheochromocytoma, metastases, cortical adenoma, cysts) Renal diseases (acute and chronic nephritis, renal insufficiency, renal stones, renal prolapse) renal stone, renal prolapse, wandering kidney, renal agenesis, duplicated kidney, hydronephrosis, polycystic kidney, renal cyst, renal benign and malignant tumor, perinephric hematoma or abscess or effusion, renal tuberculosis, nutcracker sign, renal arteriosclerosis) ureteral disease (fluid, stone, cyst, tumor) bladder and urethra disease (inflammation, stone, foreign body, blood clot, diverticulum, tumor, residual urine determination, urinary retention) prostate and seminal vesicle disease ( prostate hypertrophy, inflammation, tumor, stone, cyst, seminal vesicle inflammation, seminal vesicle tumor or stone, seminal vesicle agenesis, ejaculatory duct cyst) Scrotal diseases (testicular or epididymitis, testicular torsion, testicular tumor or hematoma, testicular atrophy or hypoplasia, syringomyelia, cryptorchidism, seminal cyst, varicocele, inguinal hernia) Uterine adnexal and pelvic diseases (malformation, uterine fibroids, adenomyosis, endometrial polyps, endometrial hyperplasia, endometrial cancer, endometrial calcification, uterine effusion, birth control device, benign and malignant ovarian tumors, chocolate cysts, follicular cysts, luteal cysts, luteinizing cysts, polycystic ovaries, follicle monitoring, pelvic varicose veins, pelvic effusion) Pregnancy (early, midterm, late pregnancy, gestational age determination, abnormal embryonic development, fetal orientation, twin or multiple fetuses, ectopic pregnancy, pre-eclampsia, refractory miscarriage, premature miscarriage, Bone, joint and muscle diseases (soft tissue edema or abscess or hematoma or tumor, tendon rupture, joint cavity effusion, N-fossa cyst, tendon sheath cyst, foreign body) Abdominal and retroperitoneal space diseases (tumor, hematoma or abscess, lymph node enlargement, abdominal artery and vein abnormalities) Ultrasound-guided interventional therapy (puncture biopsy, suction abortion, abortion)