医学影像诊断学----3.ppt

Imaging Diagnosis of Respirotary System
Yongdong Wang, MD
Professor of Radiology
Overview of RS
ponent of chest
Density difference in the area
parison
Imaging modalities which can be chosen for RS
ponent of chest
Soft tissue
Skin,muscle,mediastinum,breast,diaphragm
Bone
rib,thoracic spine,scapula,clavicle,sternum
Trachea and bronchus
lung
parison
Very good parison
High density
Medium density
Low density
X-ray examinations are dependent upon the density resolution
Imaging modalities for RS
X-ray
Conventional M:fluoroscopy & radiography
Special M:tomography & high voltage radiography
Bronchography
CT
Ultrasound
MRI
Advantages of Conventional M
Fluoroscopy
fast,convenient,cheap,rotate the patient, functional change of the lung, mass screen
Radiography
fast,convenient,static image with sharp & clear margin,storage of the case’s information for teaching,review,research, and legal purposes,etc
Disadvantages of Conventional M
Fluoroscopy
obscure image, no record
Radiography
can’t rotate the patient, no functional changes can be seen
Mechanism of tomography
Tube motion
Film motion
Bronchography
Method
Insert a tube
Anesthesia the carini bifurcation
Select the targeted bronchus to inject the contrast media
Taking photograph of the bronchus