欧兽01 小动物影像学

Small

Animal

Small Animal

RadiologyRadiolog小动物影像学

天师淘宝网店丗

http://doc.guandang.net天师淘宝网店丗

http://doc.guandang.netProf. dr. Paul Y Barthez, Dip. ECVDI, Dip. ACVR

qg,pPr Dominque Begon, Dip. ECVDI

Dr Edoardo Auriemma, Dip ECVDI

Basisof

Radiographic

Basis of Radiographic

ImageFormationImage Formation

放射成像基础

天师宠物医疗光盘之家出品丗http://doc.guandang.netProf. dr. Paul Barthez, Dip ACVR, Dip ECVDI

pbarthez@http://doc.guandang.netp@

天师宠物医疗光盘之家出品丗http://doc.guandang.net

本店主营丗执业兽医考试资料丆宠物医疗手术丆各宠物医生

大会丆专业电子书丆专业课件等。Itdti简介Introduction

1895 : Discovery of x-1895:Discoveryofx-rays, by Röntgen, in Germany1895 : Discovery of xraysbyRöntgeninGermany

Röntgen在德国发现X光线

1896 : First radiograph of an animal

第一张动物的第张动物的X光片

1900:AmericanRoentgenRaySociety1900 : American Roentgen Ray Society

美国X射线学会

ItdtiIntroduction 简介

20thcentury : technological improvement20世纪：技术革新

1962:AmericanCollegeofVeterinary1962 : American College of Veterinary Radiology (ACVR)

美国兽医放射学学院

1992E1992 : European College of Veterinary CllfVti

Diagnostic Imaging (ECVDI)

欧洲兽医影像诊断学院

Radiographic Image Formation

X射线影像形成

Radiographic image is made by attenuationdifferencesof the differences ofthex-raybeam as it goes through beamasitgoesthrough

different parts of the body

放射影像是当X射线穿过物体的不同部位时因

其衰减程度不同而形成的

X-ray machine ray machine XX光机RdilRadiology

RadiographXRadiographX光片

Receptor受体

Interaction between X-

Interaction between X-rays and Matter y

X光与物体的相互作用

X-rays can X光可以:

–go throughgothrough穿过

–be stopped不能穿过

–be deviated偏移BlackBlk黑色Grey to white灰色到白色Fog 雾状

AttAttenuation ti衰减衰减作用作用

Decrease in number of x-Decrease in number of x-rays

X光的数量减少

gp Decreasing exponential law :

曝光减少量公式

Ix= I=Ioe-mx

AttAttenuation ti衰减作用

Depends on pthickness 取决于厚度 Depends on composition 取决于组成–Density Density密度

–Atomic number原子数

Depends on Dependsonenergy energyof x-ofx-rays (kV)of xrays(kV)取决于X射线的能量

–When energy increases, attenuation decreases能量下降，衰减能量下降，衰减作用下降作用下降

Radiographic Image

BrightnessandContrastBrightness and Contrast

X光片亮度与对比度

Mean attenuation : image brightness 平均衰减作用：影像亮度

Differences in attenuation : image Differencesinattenuation:imagecontrast contrast衰减作用的差异：影像对比度

BihtBrightness 亮度

Mean brightness= sum

of attenuation when x-of attenuation when x-

rays are going through

thebodythe body

平均亮度=X光穿过物体衰

减作用的总和

Objects areObjectsare

superimposed one

overtheothersover the others

物体相互重叠

Differences in Attenuation

衰减差异性

Composition: density and atomic number 成分：密度和原子数

–5 categories of opacityin the body with visible differences in attenuationiibldiffittti

体内具有可辨识出的衰减差异的5类不透明度结构

Contrast : 5 Different Types of OpacityContrast:5DifferentTypesofOpacity

对比度：5种不同类型的不透明度Metal金属

Bone骨骼

Water (soft tissue / liquid)

水（软组织/液体）

Fat 脂肪

Air / gas空气/气体

SilhSilhouette tt

轮廓

Radiographic image : shadow X光片：阴影

We can only see the silhouetteof soft titissue structurestt

我们只能见到软组织结构的轮廓

R

dil

Radiology影像学

Poor contrast resolution 对比度分辨率差 Improvement with contrast procedures 对比度操作改进

bd336x280();0-1601-378.jpg" alt="欧兽01 小动物影像学" />

Contrast Resolution

对比度分辨率