17医学图像遥感.pdf

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Remote sensing (part 2) Medical Image Technology (non-invasive techniques of diagnosis in medicine) WANG Zhaomin Text book: International A/AS Level p400-424 WANG Zhaomin 1 What is the remote sensing? Remote sensing is a modern diagnostic technique we can obtain detailed information concerning internal structures. This is called as a non-invasive technique which presents a much smaller risk than surgery and far less traumatic for the patient. WANG Zhaomin 2 1. X-ray image : Conventional x-rays image X-ray Computerized Tomography (X-CT) 2. MRI (ma ic resonance image) 3. USI (Ultra sound image) WANG Zhaomin 3 1. X-ray image ▪ Rontgen (1895): X ray Cormack and Hounsfield (1979): X-CT WANG Zhaomin 4 X-ray Production 20-100kV _ + rotating anode (cooled metal) (held at earth electrons potential) ~ Evacuated chamber X ray (0.0001mmHg) heated filament (cathode) WANG Zhaomin 5 S e the majority of the energy of the rotating anode electrons is transferred

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