| General > General Technical Chat |
| I got exposed to toxic material of a thermometer... |
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| KaneTW:
1. Was it a workplace accident? If yes, go see a doctor regardless of anything if you believe you have been exposed. 2. Thallium is quite toxic, and absorbs via any route (skin, ingestion, inhalation). But unless you were touching a spill directly it's unlikely that a significant exposure occurred. For reference, airborne concentrations of 15mg/m3 are acutely dangerous. 3. If you're worried, see a doctor and don't ask on a forum. |
| TimFox:
--- Quote from: Veteran68 on August 23, 2023, 07:55:13 pm ---I still set off metal detectors! LOL --- End quote --- The threshold level for detecting non-magnetic metal is less than the hardware you contain: consider the weapons you could fabricate from less material. This is a frequent problem at TSA airport security gates with orthopedic implants, but not the much lighter dental implants, and they have procedures for that. An analogous problem is the (short-lived) radiation from certain medical procedures that follow radioactive tracers through the body. While it lasts, the radiation level just outside the body is above the threshold for radiation portal detectors. |
| Zero999:
It's not just magnetism which is the hazard of MRI. The RF can induce currents which result in heating. It depends on the impedance of the metal. If it's very low, it'll just reflect, whist if it's a bit higher, it'll heat up. |
| Gyro:
--- Quote from: Veteran68 on August 23, 2023, 05:39:58 pm --- --- Quote from: TimFox on August 23, 2023, 03:56:25 pm ---Many metal surgical implants are now made from titanium to avoid injury from the strong magnetic field in MRI, and because titanium works well with bones in situ. --- End quote --- I'm crossing my fingers that holds true in case I ever need an MRI, considering I have three titanium plates and 36 titanium screws holding my sternum together. :) --- End quote --- Yep, the ones in my skull are fine in the MRI scanner. |
| TimFox:
--- Quote from: Zero999 on August 23, 2023, 08:49:53 pm ---It's not just magnetism which is the hazard of MRI. The RF can induce currents which result in heating. It depends on the impedance of the metal. If it's very low, it'll just reflect, whist if it's a bit higher, it'll heat up. --- End quote --- Yes, induced RF currents are hazardous. It depends strongly on the geometry of the implanted metal. |
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