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0.7 mSv [9] 175 flight-hours Public dose limit: limit: 1 mSv [15] 250 flight-hours Lumbar spine x-ray: singular: 1.5 mSv [9] 375 flight-hours Background radiation in Toronto, CA: annual: 1.6 mSv [5] 400 flight-hours Brain CT scan: singular: 2 mSv [9] 500 flight-hours Background radiation - worldwide average: annual: 2.4 mSv [5] 600 flight-hours ...
0.7 7 × 10 ^ −1: Acute-Mammogram [7] 1 1 × 10 ^ 0: Annual: 0.11: Limit of dose from man-made sources to a member of the public who is not a radiation worker in the US and Canada [6] [9] 1.1 1.1 × 10 ^ 0: Annual: 0.13: Average USA radiation worker occupational dose in 1980 [6] 1.2 1.2 × 10 ^ 0: Acute-Abdominal X-ray [7] 2 2 × 10 ^ 0 ...
The average radiation dose from an abdominal X-ray is 0.7 millisieverts (0.0007 Sv), that from an abdominal CT scan is 8 mSv, that from a pelvic CT scan is 6 mGy, and that from a selective CT scan of the abdomen and the pelvis is 14 mGy. [7]
Dose area product (DAP) is a quantity used in assessing the radiation risk from diagnostic X-ray radiography examinations and interventional procedures, like angiography.It is defined as the absorbed dose multiplied by the area irradiated, expressed in gray-centimetres squared (Gy·cm 2 [1] – sometimes the prefixed units dGy·cm 2, mGy·cm 2 or cGy·cm 2 are also used). [2]
The roentgen or röntgen (/ ˈ r ɛ n t ɡ ə n,-dʒ ə n, ˈ r ʌ n t-/; [2] symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays, and is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air (statcoulomb per kilogram).
It is the absorbed energetic dose before the biological efficiency of the radiation is factored in. The rep has variously been defined as 83 or 93 ergs per gram of tissue (8.3/9.3 mGy) [2] or per cm 3 of tissue. [3] At the time, this was thought to be the amount of energy deposited by 1 roentgen. [4]
The rep has variously been defined as 83 or 93 ergs per gram of tissue (8.3/9.3 mGy) [13] or per cc of tissue. [14] In 1953 the ICRU recommended the rad, equal to 100 erg/g as a new unit of absorbed radiation, [15] but then promoted a switch to the gray in the 1970s.
The Highway Patrol are specialized units part of the Highway District with the Transportation Bureau of the New York City Police Department. [3] The Highway Patrol is primarily responsible for patrolling and maintaining traffic safety on limited-access highways within New York City. The Highway Patrol's other duties and roles include accident ...