PG Preparation

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    Radiotherapy
    1. Isotopes: Elements with same Atomic number (Number of protons same, Number of Neutrons Vary) 
    2. Most used materials for external irradiation- Cobalt 60 , Cesium 131 ( Gamma rays) 
    3. Machine used for electron therapy- Betatron , Material used is Tungsten 
    4. Substances used as permanent implant for radiation- 
      • Gold Grains 
      • Radon Seeds 
    5. For permanent insertion into cavities 
      • Colloidal Gold 
      • Vitrium 
      • Phosphorus 52
    6. Radio active phosphorus is useful in
    Diagnosis of
    • Eye Cancers 
    • Oesophageal Cancer
    Treatment of – 
    • Polycythemia Vera 
    • Multiple Myeloma 
    • Secondaries in Bone 
    • Ca Prostate after priming with androgen. 
    • Malignant ascites 
    Effect of Radiation on Tissues
     
    Most Commonly affected Skin
    Most Senstive Mucosa Intestinal Mucosa
    Most Sensitive CNS part Mid Brain, Medulla, Spinal Cord
    Most sensitive cell in CNS Neurone
    Most Sensitive blood cells Lymphocytes
    Most resistant Blood cells Platelets
    Most sensitive organ in abdomen Kidney

 


 

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