Originally posted by: villageidiot111
There is a reason dentists either step out of the room or go behind a protective shield during the xray. They are avoiding excess esposure to xrays. However, one or two xrays a year does no harm.
Originally posted by: villageidiot111
There is a reason dentists either step out of the room or go behind a protective shield during the xray. They are avoiding excess esposure to xrays. However, one or two xrays a year does no harm.
Originally posted by: AccruedExpenditure
I swear i feel my DNA getting frayed when they shoot me with that gun.
Originally posted by: alien42
i thought they put that heavy lead bib on before doing the x-rays because it was stylish![]()
could you link this new study?Originally posted by: CasioTech
I read a new study saying how dangerous dental xrays are, seeping into the brain, can anyone speculate?
Originally posted by: Encryptic
You're asking for speculation on ATOT?
That's like slashing your wrists and sticking your arms into a river full of piranha.![]()
Originally posted by: Mark R
A dental x-ray is a very low effective dose of radiation - mainly because only a small area of the body is exposed (the jaw) and the beam misses vital organs (which are more sensitive to radiation). The brain is not a particularly sensitive organ anyway - and the main x-ray beam is tightly collimated so as to irradiate the minimum amount of the body that isn't necessary for the image.
A typical dental x-ray carries an effective dose of about 10 - 20 µSv. This is equivalent to about 2-3 days of average natural background radiation. It carries no immediate health risk, but is believed to contribute an approx 1 in 1 million chance of giving you a fatal cancer over the next 50 years. (This is estimate is based on extrapolations of the data from the Hiroshima bomb survivors, and there is some controversy over its validity. Despite this, it remains the current best theory and states that there is *no* safe dose, and that the risk of cancer is directly proportional to the dose)
For staff, it's a sensible precaution to step out of the room during an exposure. To staff, the most dangerous radiation source in the room is the patient! In a typical medical x-ray, about 30-40% of the main x-ray beam actually bounces off the patient and is scattered, in all directions, into the room. This is far, far more significant than x-rays leaking past defective shields, or a technician accidentally getting their hand in the beam, etc. For a technician doing several procedures a day, the potential dose from scattered radiation can be significant (particulalry for hospital technicians, who could do 100 procedures a day).
High-dose x-ray procedures like CT scans, are a somewhat different matter. A whole body CT scan, could easily contribute an effective dose of 10 mSv - 1000 times more than a dental x-ray.
It's believed that such a scan carries a 1 in 1000 risk of fatal cancer. This is why it is not appropriate to do whole body scans as part of a routine 'health check'. (Check up scans after cancer, or other illness is a different matter, as CT scans may be the only way to check on progress).
Originally posted by: myusername
Originally posted by: Mark R
A dental x-ray is a very low effective dose of radiation - mainly because only a small area of the body is exposed (the jaw) and the beam misses vital organs (which are more sensitive to radiation). The brain is not a particularly sensitive organ anyway - and the main x-ray beam is tightly collimated so as to irradiate the minimum amount of the body that isn't necessary for the image.
A typical dental x-ray carries an effective dose of about 10 - 20 µSv. This is equivalent to about 2-3 days of average natural background radiation. It carries no immediate health risk, but is believed to contribute an approx 1 in 1 million chance of giving you a fatal cancer over the next 50 years. (This is estimate is based on extrapolations of the data from the Hiroshima bomb survivors, and there is some controversy over its validity. Despite this, it remains the current best theory and states that there is *no* safe dose, and that the risk of cancer is directly proportional to the dose)
For staff, it's a sensible precaution to step out of the room during an exposure. To staff, the most dangerous radiation source in the room is the patient! In a typical medical x-ray, about 30-40% of the main x-ray beam actually bounces off the patient and is scattered, in all directions, into the room. This is far, far more significant than x-rays leaking past defective shields, or a technician accidentally getting their hand in the beam, etc. For a technician doing several procedures a day, the potential dose from scattered radiation can be significant (particulalry for hospital technicians, who could do 100 procedures a day).
High-dose x-ray procedures like CT scans, are a somewhat different matter. A whole body CT scan, could easily contribute an effective dose of 10 mSv - 1000 times more than a dental x-ray.
It's believed that such a scan carries a 1 in 1000 risk of fatal cancer. This is why it is not appropriate to do whole body scans as part of a routine 'health check'. (Check up scans after cancer, or other illness is a different matter, as CT scans may be the only way to check on progress).
I can't point you to a link, but IIRC I read in a scientific journal several years ago that they had determined that if a particle of ionizing radiation strikes a cell's chromosome, there is a 100% chance it will cause cancer.
IOW, the percentage risk rate of cancer under a given exposure is not the probability that cancer will result from chromosomal exposure, but rather the probability that a particle will strike a chromosome. It's mathematically the same thing, but the psychology of it is a lot creepier.
Originally posted by: Mark R
A dental x-ray is a very low effective dose of radiation - mainly because only a small area of the body is exposed (the jaw) and the beam misses vital organs (which are more sensitive to radiation). The brain is not a particularly sensitive organ anyway - and the main x-ray beam is tightly collimated so as to irradiate the minimum amount of the body that isn't necessary for the image.
A typical dental x-ray carries an effective dose of about 10 - 20 µSv. This is equivalent to about 2-3 days of average natural background radiation. It carries no immediate health risk, but is believed to contribute an approx 1 in 1 million chance of giving you a fatal cancer over the next 50 years. (This is estimate is based on extrapolations of the data from the Hiroshima bomb survivors, and there is some controversy over its validity. Despite this, it remains the current best theory and states that there is *no* safe dose, and that the risk of cancer is directly proportional to the dose)
For staff, it's a sensible precaution to step out of the room during an exposure. To staff, the most dangerous radiation source in the room is the patient! In a typical medical x-ray, about 30-40% of the main x-ray beam actually bounces off the patient and is scattered, in all directions, into the room. This is far, far more significant than x-rays leaking past defective shields, or a technician accidentally getting their hand in the beam, etc. For a technician doing several procedures a day, the potential dose from scattered radiation can be significant (particulalry for hospital technicians, who could do 100 procedures a day).
High-dose x-ray procedures like CT scans, are a somewhat different matter. A whole body CT scan, could easily contribute an effective dose of 10 mSv - 1000 times more than a dental x-ray.
It's believed that such a scan carries a 1 in 1000 risk of fatal cancer. This is why it is not appropriate to do whole body scans as part of a routine 'health check'. (Check up scans after cancer, or other illness is a different matter, as CT scans may be the only way to check on progress).
Originally posted by: Eeezee
Originally posted by: myusername
Originally posted by: Mark R
A dental x-ray is a very low effective dose of radiation - mainly because only a small area of the body is exposed (the jaw) and the beam misses vital organs (which are more sensitive to radiation). The brain is not a particularly sensitive organ anyway - and the main x-ray beam is tightly collimated so as to irradiate the minimum amount of the body that isn't necessary for the image.
A typical dental x-ray carries an effective dose of about 10 - 20 µSv. This is equivalent to about 2-3 days of average natural background radiation. It carries no immediate health risk, but is believed to contribute an approx 1 in 1 million chance of giving you a fatal cancer over the next 50 years. (This is estimate is based on extrapolations of the data from the Hiroshima bomb survivors, and there is some controversy over its validity. Despite this, it remains the current best theory and states that there is *no* safe dose, and that the risk of cancer is directly proportional to the dose)
For staff, it's a sensible precaution to step out of the room during an exposure. To staff, the most dangerous radiation source in the room is the patient! In a typical medical x-ray, about 30-40% of the main x-ray beam actually bounces off the patient and is scattered, in all directions, into the room. This is far, far more significant than x-rays leaking past defective shields, or a technician accidentally getting their hand in the beam, etc. For a technician doing several procedures a day, the potential dose from scattered radiation can be significant (particulalry for hospital technicians, who could do 100 procedures a day).
High-dose x-ray procedures like CT scans, are a somewhat different matter. A whole body CT scan, could easily contribute an effective dose of 10 mSv - 1000 times more than a dental x-ray.
It's believed that such a scan carries a 1 in 1000 risk of fatal cancer. This is why it is not appropriate to do whole body scans as part of a routine 'health check'. (Check up scans after cancer, or other illness is a different matter, as CT scans may be the only way to check on progress).
I can't point you to a link, but IIRC I read in a scientific journal several years ago that they had determined that if a particle of ionizing radiation strikes a cell's chromosome, there is a 100% chance it will cause cancer.
IOW, the percentage risk rate of cancer under a given exposure is not the probability that cancer will result from chromosomal exposure, but rather the probability that a particle will strike a chromosome. It's mathematically the same thing, but the psychology of it is a lot creepier.
100% chance? That's pretty hard to believe, but I guess it's possible... okay...
Now consider the fact that a random particle of ionizing radiation has a very small chance of hitting a cell's chromosome
Now consider that your body develops and rids itself of cancers daily.
In fact, the chances of your body having some measurable traces of uranium (a RADIOACTIVE element) are fairly high, yet this isn't all that dangerous. Your body is showered with cosmic radiation every second. Your skin absorbs this radiation so as to protect you ;-)
Car accidents cause many times more deaths than cancer caused by radiation, yet people are many times more afraid of radiation than they are of car accidentsRadiation is not very high on the list of "things to worry about" in terms of what kills you
stop buying into FUDOriginally posted by: CasioTech
now i'm afraid to go get fitted for invisalign.
