Outlines requirements and time allocation 15 Fat and Lipid : 。Heavy Metal Synonym:High density InChinese高密度 度 Radiopaque Synonym:High density 20° Soft tissue and body fluid(water density) ht d posion Radiolucent ic cae mediastinum,abdominal area(light or white) Synonym:High density Methods of X-ray Examination ·Conventional: roscopy : aphy X-RAY:Normal abdomen APview ofabdomen in supine position Low dem bowel gas ·Bones.:High density All abdominal 10 · compounds into the vessels.etc. agents 3 3 Outlines, requirements and time allocation BASIC DENSITIES ⚫ Gas (Air) ⚫ Fat and Lipid ⚫ Soft Tissue (Muscle) ⚫ Calcium (Bone) ⚫ Heavy Metal Special terms used on x-ray reports: ⚫ Radiopaque (light or white). Synonym: High density In Chinese 高密度 ⚫ Radiolucent (dark or black). Synonym: Low density In Chinese 低密度 ⚫ Water density Natural densities in the body ⚫ Bone - (light or white). Radiopaque Synonym: High density Soft tissue and body fluid (water density) ⚫ Lung and air containing organs X-Ray: Normal elbow. AP view of the elbow ⚫ Bone: (light or white). Synonym: High density ⚫ Muscles, skin joint space: Water density. ⚫ X-RAY: Normal chest. PA view of chest in erect position. ⚫ Lung: (dark or black) Radiolucent ⚫ Low density. ⚫ Bony thoracic cage, mediastinum, abdominal area: (light or white). Radiopaque ⚫ Synonym: High density Methods of X-ray Examination ▪ Conventional: Fluoroscopy Radiography ▪ Digital Radiography ▪ Special: contrast X-RAY:Normal abdomen. AP view of abdomen in supine position ⚫ Normal bowel gas: Low density. ⚫ Bones: High density. All abdominal organs: Water density. CONTRAST AGENT ⚫ Administered material used to see structures or pathologic processes that would not be seen otherwise. Some contrast agents: Barium sulfate into the GI tract; or iodine compounds into the vessels, etc. ⚫ Any pathological process which may cause density difference to the adjacent structures can be visualized on plain x-ray film by the natural contrast effect. Such as high density tumor mass in the aerated lung; or low density bone cyst in the radiopaque bone. 15’ 20’ 5’ 10’