医学影像原理介绍.ppt

1.5T磁振攝影機 1.5T SIGNA MR/i 磁共振儀 3T 磁振造影機 3.0T SIGNA MR 高磁場磁共振儀  高磁場全身性掃瞄磁共振儀, 其特殊的性能可滿足您臨床領域與專業研究的需求. 尤其於神經方面的應用: Real Time 功能性影像, DWI, 頻譜分析. MRI image principle MRI image principle MRI image principle MRI image reconstruction MRI image reconstruction MRI image - Angiography Axial head, 22 cm FOV, 45.6 mm Thk, GE(20o), TR/TE = 33.33/3 ms, 1 Nex, 256x224 matrix MRI image - Neck Coronal head with pathology, 22 cm FOV, 2.5 mm Thk, GE(30o), TR/TE = 11/2 ms, 1 Nex, 256x192 matrix MRI image - spine Sagittal lumbar spine, 32 cm FOV, 3 mm Thk, 256x256 matrix, 2 Nex, SE A) TR/TE = 600/15 B) TR/TE = 4000/96 C) TR/TE = 2000/16 A B C What is Nuclear medicine? 　 Nuclear medicine Functional image study Emission detection Radionuclide and Pharmaceutical Short half life, low radiation 核醫診斷常用之同位素 Basic Scanning produre in CT Basic Scanning produre in CT CT generation First generation: one x-ray tube, one detector Secondary generation: one x-ray tube , many detectors Third generation: one x-ray tube, arch detector array Fourth generation: circular detector , one x-ray tube The basic internal geometry of a third-generation spiral CT scanner Single –Slice and Multi-Slice CT Multi-Slice CT detector array Dynamic Spatial reconstruction System Dynamic Spatial reconstruction System Electron beam CT Half arch target Arch detector array Electron beam CT 電腦斷層攝影機 電腦斷層掃描儀 1970年代中期電腦斷層掃瞄儀 (CT) 的出現，使得傳統醫療診斷影像產生革命性的演進。 CT image - Brain Brain Study, variable slice thicknesses.There are 3 images in this series. HiSpeed NX/i Images CT image - Chest LightSpeed Series CT image - Chest HiSpeed X/i Series Thorax study, 0.7 sec scan time, auto-mA mode. CT image -Spine LightSpeed Series Images and Case Studies - Spine NRI introduction Nuclear magnetic resonance(NMR) is a chemical analytical technique that has been used for over 50 years. Image technique call MRI. MRI introduction Non-ionizing radiation Minimally invasive Capable of providing excellent soft-tissue contra