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Questions and Answers
What is responsible for creating scintillation in the crystal?
What is responsible for creating scintillation in the crystal?
- The scattering of photons through Compton scattering
- The deposition of energy by a photon through the photoelectric effect (correct)
- The density and thickness of the crystal
- The activation of the crystal by nonradioactive thallium
Which property of the crystal determines the useful energy range and resolution that can be detected?
Which property of the crystal determines the useful energy range and resolution that can be detected?
- Overall dimensions
- Density (correct)
- Thickness
- Activation with nonradioactive thallium
What type of crystals have provided the best sensitivity for isotopes with energy levels between 50 and 150 keV?
What type of crystals have provided the best sensitivity for isotopes with energy levels between 50 and 150 keV?
- Sodium iodide crystals (NaI) activated with nonradioactive thallium (correct)
- Quartz crystals
- Diamond crystals
- Sodium iodide crystals (NaI) without activation
How does the thickness of the crystal affect sensitivity and resolution?
How does the thickness of the crystal affect sensitivity and resolution?
What does the sensitivity of an instrument refer to?
What does the sensitivity of an instrument refer to?
What percentage of the overall human tumor do primary neoplasms of the skeleton amount to?
What percentage of the overall human tumor do primary neoplasms of the skeleton amount to?
Which genetic disorder makes people much more likely to develop several types of cancer, including osteosarcoma and other types of sarcoma?
Which genetic disorder makes people much more likely to develop several types of cancer, including osteosarcoma and other types of sarcoma?
What gene mutation causes the inherited form of retinoblastoma and also increases the risk of developing bone or soft tissue sarcomas?
What gene mutation causes the inherited form of retinoblastoma and also increases the risk of developing bone or soft tissue sarcomas?
Which syndrome is caused by abnormal changes in the gene REQL4 and makes children more likely to develop osteosarcoma?
Which syndrome is caused by abnormal changes in the gene REQL4 and makes children more likely to develop osteosarcoma?
What type of neoplasms in bone are more common?
What type of neoplasms in bone are more common?
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