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Radiotherapy
- Isotopes: Elements with same Atomic number
(Number of protons same, Number of Neutrons Vary)
- Most used materials for external irradiation- Cobalt 60 , Cesium 131 ( Gamma rays)
- Machine used for electron therapy- Betatron , Material used is Tungsten
- Substances used as permanent implant for radiation-
- For permanent insertion into cavities
- Colloidal Gold
- Vitrium
- Phosphorus 52
- 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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