Ultrasound of Digestive System Hua Zhuang West China Hospital
个人简介 庄华，女，42岁，博士，四川大学华西医院超声科，副主任医师，硕士生导师，四川省医学会超声专业委员会青年委员，海峡两岸医药交流协会超声医学专家委员会委员，中华医学会消化病学分会消化影像协作组委员，中国超声医学工程学会浅表与血管专业委员会、生殖健康与优生优育专业委员会委员。 临床主中要承担胃肠及盆底超声诊断工作。
Contents Foudation of sonography Anatomic and physiogic relationships of digestive system Normal findings of abdominal scanning Diseases
what is ultrasound?
What is ultrasound Auditory Range Infrasound Herts Ultrasound 20 20000 the frequency of diagnostic ultrasound The word "ultrasound", in physics, refers to all sound with a frequency humans cannot hear. In diagnostic sonography, the ultrasound is usually between 2 and 18 MHz. Higher frequencies provide better quality images, but are more readily absorbed by the skin and other tissue, so they cannot penetrate as deeply as lower frequencies. Lower frequencies can penetrate deeper, but the image quality is inferior.
WHAT CAN WE DO WITH ULTRASOUND DIAGNOSTIC ULTRASOUND Effective for imaging soft tissues of the body Musculoskeletal system Urinary system Liver , pancreas , billiary tract Gynecologic and obstetric system Echocardiography Etc. THERAPEUTIC ULTRASOUND Interventional therapy Tumor ablation Guidance of the biopsy INDUSTRIAL USE Injury detection
Ultrasound machine
The formation of ultrasound Ultrasound probe------energy converter(piezoelectric crystal) piezoelectric effect inverse piezoelectric effect 静态三维（先进行二维成像，再利用计算机技术进行重建）、实时三维（不经二维成像采集，而即时显示三维超声图像，即动态、实时三维）
superficial Left liver Right side Left side Right liver deep
Near field caudal cranial Far field Right kidney Inferior pole Superior pole Far field
Echo type Hyperechoic Isoechoic Hypoechoic Sonolucent
Anatomy of digestive system and normal organs’ sonography Liver Bile ducts system Pancreas Spleen Stomach Small intestine Large intestine Rectum
liver
The segments of the liver
Gallbladder and Bile ducts 目前超声诊断仪能常规显示左右肝管、肝总管及胆总管。正常胆管纵切面图像为相应门静脉前壁的管道，壁为纤细光滑的高回声带，管道内为无回声区。 左、右肝管内径一般不超过2mm，肝总管内径3 ~ 4mm，胆总管内径6 ~ 8mm。
Pancreas
Spleen
Diseases Liver Bile ducts system Pancreas Spleen Stomach Intestines