Podcast
Questions and Answers
What is the equivalent number of chest x-rays with a CT Abdomen or Pelvis scan?
What is the equivalent number of chest x-rays with a CT Abdomen or Pelvis scan?
- 35
- 500 (correct)
- 50
- 400
Which organ receives the highest radiation dose during a Pelvis CT scan?
Which organ receives the highest radiation dose during a Pelvis CT scan?
- Uterus (correct)
- Thyroid
- Gonads
- Eye lens
What is the induction of erythema typically caused by in terms of Gy?
What is the induction of erythema typically caused by in terms of Gy?
- 8 Gy
- 2 Gy (correct)
- 40 mGy
- 26 mGy
How does modern CT scanners modulate the mA during the scan?
How does modern CT scanners modulate the mA during the scan?
What is the typical range of patient skin doses in CT scans?
What is the typical range of patient skin doses in CT scans?
If the mAs is reduced to half with no other changes, what effect does this have?
If the mAs is reduced to half with no other changes, what effect does this have?
What aspect of tissue influences Compton scatter and plays a dominant role in forming contrast in medical CT?
What aspect of tissue influences Compton scatter and plays a dominant role in forming contrast in medical CT?
How many shades are utilized in the gray-scale of CT image voxels?
How many shades are utilized in the gray-scale of CT image voxels?
What technological advancement led to helical (spiral) acquisition in CT imaging?
What technological advancement led to helical (spiral) acquisition in CT imaging?
In helical CT scanning, what does the pitch parameter indicate?
In helical CT scanning, what does the pitch parameter indicate?
Which detector is commonly used in modern CT systems?
Which detector is commonly used in modern CT systems?
How does a narrower window width affect the contrast of a CT image?
How does a narrower window width affect the contrast of a CT image?
What does the slice sensitivity profile describe in single slice CT?
What does the slice sensitivity profile describe in single slice CT?
How does helical data set interpolation compensate for differences in CT reconstruction algorithms?
How does helical data set interpolation compensate for differences in CT reconstruction algorithms?
What does the choice of CT reconstruction kernel or algorithm chosen by the operator affect?
What does the choice of CT reconstruction kernel or algorithm chosen by the operator affect?
What is the role of CT numbers in determining the amount of calcification in pulmonary nodules?
What is the role of CT numbers in determining the amount of calcification in pulmonary nodules?
Which aspect of radiation dose in CT is unique compared to chest radiography?
Which aspect of radiation dose in CT is unique compared to chest radiography?
What is the principal interaction mechanism in CT that contributes to a considerable radiation dose from scattered radiation?
What is the principal interaction mechanism in CT that contributes to a considerable radiation dose from scattered radiation?
What does the Multiple Scan Average Dose (MSAD) in CT measure?
What does the Multiple Scan Average Dose (MSAD) in CT measure?
How is the Computed Tomography Dose Index (CTDI) measured?
How is the Computed Tomography Dose Index (CTDI) measured?
Which factor influences the Collimator Pitch CTDIvol in CT imaging?
Which factor influences the Collimator Pitch CTDIvol in CT imaging?
What is the impact of increasing pitch while holding other factors constant in CT scanning?
What is the impact of increasing pitch while holding other factors constant in CT scanning?
In which body scans are CTDI values typically lower and why?
In which body scans are CTDI values typically lower and why?
What parameter increases with tube voltage in CT imaging?
What parameter increases with tube voltage in CT imaging?
What does decreasing kVp do to dose in CT imaging with other factors constant?
What does decreasing kVp do to dose in CT imaging with other factors constant?
What is an effective way to reduce patient radiation dose in pediatric patients during CT scans?
What is an effective way to reduce patient radiation dose in pediatric patients during CT scans?
