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Chapter 9 rad scien
Chapter Radiologic Sciences
Question | Answer |
---|---|
List the characteristics of Man-made radiation | Travels at the speed of light, electromagnetic radiation, deposits energy randomly |
List the radiation quantities and units of measurement. Also list the definition and the SI unit for each | Roentgen Coulomb/Kilogram measure of ionization in air Rad Gray absorbed dose (by patient) Rem Sievert Radiation eqivalent man (tech Curie Bacquerel (Radiation in air) |
What three things must you have in order for x-ray production to occur? | 1. Source of electrons (mA) 2. force of electrons (KVP) 3. Anode (something to stop the electrons) These must occur in a vaccum |
What three possibilities can occur once the x-ray tube and interacts with matter? | 1. Change in direction (scatter) 2. Absorbed 3. Pass through with out any interferance |
Explain the 5 types of x-ray interactions with matter | 1. Coherent- < 10 K inter with the all atom absorbed takes in no energy 2. Compton - x ray range keeps 2/3 of energy 3. Photo elec - ion pair. Cascade effect. 4. pair prod - 1.02 mev positron and negatron 5. photodis - 10 mev inter w nu nu fragm |
Which x ray interactions are within diag. range? | Coherent, Compton and Photo electric |
Which x ray inter actions are of most importance to diagnostic x ray? | Compton and Photo electric |
Which one of the interactions constitutes the greatest hazard to the patient? | Photo electric |
Which one of the interactions constitutes the greatest hazard to the technologist? | Compton |
Describe a nucleus | Only place that has DNA in the cell |
Describe the cell membrane | semi permeable selective of what it lets in |
What do Ribosomes do? | Protein synthesis |
What does the Endoplasmic Reticulum do? | Takes information that RNA gets from the DNA and takes it to the rest of the cell |
What does the Nucleolus store? | RNA |
What do the mitochondria do? | They are the engines of the cell |
What is the function of the Lysosomes? | Garbage disposals |
What takes place in the cytoplasm? | All metabolic activities |
What are the two major structures of the cells? | 1. Nucleus 2. Cytoplasm |
What are the two classifications of cells with in the body? How do they reproduce? How many chromsomes do they each contain? | Somatic- Mitosis. All cells except germ cells. Diploid number. 46 chromosomes 2. Germ - Meiosis. sex cells 23 chromosomes haploid. |
Define the law of Bergonie and Tribondeau | Intensity of maturity plays functional role the less mature and specialized the more radio sensitive the less mature and specialized the more radio sensitive |