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Did you actually discredit someone or have you not properly considered your units in this response? Commute through the Grand Central station everyday is certa

Did you actually discredit someone or have you not properly considered your units in this response? Commute through the Grand Central station everyday is certainly not a few hours. And people don't tend to get a CT scan very frequently so the timeline here is massive.

uh_uh 1y ago
In your opinion how many hours spent in Grand Central station equal the radiation received from a CT scan?
- itishappy 1y ago
  Somewhere between 7 and 700 days. CT Scan: 10-1000 mrem Grand Central Station: 525 mrem / yr https://files.eric.ed.gov/fulltext/ED297952.pdf https://files.eric.ed.gov/fulltext/ED297952.pdf
  - uh_uh 1y ago
    So OP's statement is true for people who live IN the station.
    - itishappy 1y ago
      It's roughly 40 min per workday over a typical year. That's a bit high but not unreasonably so.
      - uh_uh 1y ago
        That would amount to 10 mrem of radiation per year. I don't believe this is a realistic estimate for a CT scan though. From epa.gov [1]: - Head CT: 2.0 mSv (200 mrem) - Chest CT: 8.0 mSv (800 mrem) - Abdomen CT: 10 mSv (1,000 mrem) - Pelvis CT: 10 mSv (1,000 mrem) So for a head CT, one would need to spend more than 13 hours per workday in the station. OP was off at least an order of magnitude. https://www.epa.gov/radiation/frequent-questions-radiation-medicine https://www.epa.gov/radiation/frequent-questions-radiation-m...
        itishappy 1y ago
        Fair enough. That was the first number I pulled from Google, but I trust your source a good deal more.
        riahi 1y ago
        This data is from 2006. Over 20 years, there has been substantial progress in CT radiation reduction through model-based iterative reconstruction and now ML-assisted reconstruction, aside from iterative advances in detector sensitivity and now photon-counting CT. In clinical practice, those doses are about 2-3x what I see on the machine dose reports every day at my place of work. In thin patients who can hold still, I've done full-cycle cardiac CT and achieved a < 1 mSv dose. We are always trying to get the dose down while still being diagnostic. Source: Practicing radiologist.
    - ramraj07 1y ago
      I used the word comparable. Given they are in the same ballpark of log scale i stand vindicated in my opinion. Also there's an apple store there. RIP all the geniuses there i suppose

uh_uh 1y ago

In your opinion how many hours spent in Grand Central station equal the radiation received from a CT scan?

itishappy 1y ago
Somewhere between 7 and 700 days. CT Scan: 10-1000 mrem Grand Central Station: 525 mrem / yr https://files.eric.ed.gov/fulltext/ED297952.pdf https://files.eric.ed.gov/fulltext/ED297952.pdf
- uh_uh 1y ago
  So OP's statement is true for people who live IN the station.
  - itishappy 1y ago
    It's roughly 40 min per workday over a typical year. That's a bit high but not unreasonably so.
    - uh_uh 1y ago
      That would amount to 10 mrem of radiation per year. I don't believe this is a realistic estimate for a CT scan though. From epa.gov [1]: - Head CT: 2.0 mSv (200 mrem) - Chest CT: 8.0 mSv (800 mrem) - Abdomen CT: 10 mSv (1,000 mrem) - Pelvis CT: 10 mSv (1,000 mrem) So for a head CT, one would need to spend more than 13 hours per workday in the station. OP was off at least an order of magnitude. https://www.epa.gov/radiation/frequent-questions-radiation-medicine https://www.epa.gov/radiation/frequent-questions-radiation-m...
      - itishappy 1y ago
        Fair enough. That was the first number I pulled from Google, but I trust your source a good deal more.
      - riahi 1y ago
        This data is from 2006. Over 20 years, there has been substantial progress in CT radiation reduction through model-based iterative reconstruction and now ML-assisted reconstruction, aside from iterative advances in detector sensitivity and now photon-counting CT. In clinical practice, those doses are about 2-3x what I see on the machine dose reports every day at my place of work. In thin patients who can hold still, I've done full-cycle cardiac CT and achieved a < 1 mSv dose. We are always trying to get the dose down while still being diagnostic. Source: Practicing radiologist.
  - ramraj07 1y ago
    I used the word comparable. Given they are in the same ballpark of log scale i stand vindicated in my opinion. Also there's an apple store there. RIP all the geniuses there i suppose