System of radiation protection module 2 - Revision history

Karen Clement: /* Dose Limits */

2019-11-04T15:11:13Z

‎Dose Limits

Karen Clement: /* Radiation Dose */

2019-11-04T15:08:12Z

‎Radiation Dose

Karen Clement: /* Radiation Dose */

2019-11-04T15:08:04Z

‎Radiation Dose

Karen Clement: /* Exposure Categories and Situations */

2019-10-28T13:18:59Z

‎Exposure Categories and Situations

Karen Clement at 17:49, 24 October 2019

2019-10-24T17:49:42Z

Karen Clement: /* Dose Limits */

2019-10-24T16:00:51Z

‎Dose Limits

Karen Clement: /* Exposure Categories and Situations */

2019-10-24T15:54:51Z

‎Exposure Categories and Situations

Karen Clement: /* Effective Dose */

2019-10-24T15:54:35Z

‎Effective Dose

Karen Clement: /* Dose Limits */

2019-10-24T15:54:21Z

‎Dose Limits

Karen Clement at 15:53, 24 October 2019

2019-10-24T15:53:18Z

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 ==Dose Limits==
-'''Dose limits help ensure that no person is exposed to an excessive amount of [[ICRPædia Guide to the Basics of Ionising Radiation|radiation]] in normal, planned situations.'''
+Dose limits help ensure that no person is exposed to an excessive amount of [[ICRPædia Guide to the Basics of Ionising Radiation|radiation]] in normal, planned situations.
 They are the strongest form of restriction on dose to an individual. Exceeding a dose limit is contrary to regulations in most countries.
 ===Dose Limits Recommended by ICRP===
 {| border="1" style="border-collapse: collapse; line-height: 1.4em; height: 450px;"
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 |}
-Dose limits alone are not enough to ensure adequate protection. They function in combination with the [[System_Of_Radiation_Protection_Overview#Fundamental Principles of Radiological Protection | fundamental principles]] of justification and optimisation.
+Dose limits alone are not enough to ensure adequate protection. They function in combination with the [[System_Of_Radiation_Protection_Overview#Fundamental Principles of Radiological Protection | fundamental principles]] of justification and optimisation. These limits apply only to doses received above the normal local [[Sources of Radiation Exposure | natural background radiation]]. Limits on [[System_of_radiation_protection_module_2#Effective Dose | effective dose]], combined with optimisation of protection, are designed to avoid a risk of [[Effects of Exposure | stochastic effects]] that would be considered intolerable in a [[System_of_radiation_protection_module_2#Exposure Categories and Situations | planned exposure situation]]. Limits on [[System_of_radiation_protection_module_2#Equivalent Dose | equivalent dose to an organ]], combined with optimisation of protection, are designed to prevent the occurance of [[Effects of Exposure | deterministic effects]].
-These limits apply only to doses received above the normal local [[Sources of Radiation Exposure | natural background radiation]].
+Dose limits apply only in [[System_of_radiation_protection_module_2#Exposure Categories and Situations | planned exposure situations]]. In other situations, restrictions on individual dose are called reference levels. They provide the additional flexibility needed in [[System_of_radiation_protection_module_2#Exposure Categories and Situations | emergency and existing exposure situations]] to make sure protection is optimised. Dose limits do not apply to [[System_of_radiation_protection_module_2#Exposure Categories and Situations | medical exposures]]. If they did, the effectiveness of diagnosis or treatment might be reduced, doing more harm than good for the patient. The emphasis is on justification of medical procedures and optimisation of protection.
 '''[[#Top|Back to Top]]'''

← Older revision		Revision as of 15:08, 4 November 2019
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	Radiation dose is a measure of the amount of exposure to radiation. There are three kinds of dose in radiological protection. ''Absorbed dose'' is a measureable, physical quantity, while ''equivalent dose'' and ''effective dose'' are specifically for radiological protection purposes.		Radiation dose is a measure of the amount of exposure to radiation. There are three kinds of dose in radiological protection. ''Absorbed dose'' is a measureable, physical quantity, while ''equivalent dose'' and ''effective dose'' are specifically for radiological protection purposes.
−

	===Absorbed Dose===		===Absorbed Dose===

@@ Line 74: / Line 74: @@
 Radiation dose is a measure of the amount of exposure to radiation. There are three kinds of dose in radiological protection. ''Absorbed dose'' is a measureable, physical quantity, while ''equivalent dose'' and ''effective dose'' are specifically for radiological protection purposes.
 ===Absorbed Dose===
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 Effective dose = sum for all organs of (equivalent dose to the organ times the appropriate tissue weighting factor)
 The tissue weighting factors are needed because different organs have different levels of sensitivity to radiation, even if the equivalent dose is the same. Effective dose is expressed in sieverts (Sv), or, more frequently, millisieverts (mSv) which are 1/1000th of a sievert. This is the most frequently used dose in radiological protection. Unless you see mention of a specific organ, a "dose" in Sv or mSv is the effective dose. In the simplest cases, for uniform whole-body exposure to gamma (photon) or beta (electron) radiation, the radiation weighting factor is 1, and the tissue weighting factors add up to 1, and therefore, for example, an absorbed dose of 1 mGy equals an effective dose of 1 mSv.
 '''[[#Top|Back to Top]]'''

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 Exposure Categories are: occupational, public, and medical.
 Exposure Situations are: planned, existing, and emergency.
 Categories and Situations are considered together to help guide the best approach to radiological protection in a particular circumstance.

← Older revision		Revision as of 17:49, 24 October 2019
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	[[File:ICRPGuide.JPG\|150px\|thumb\|right\|link=Guide_to_the_System_of_Radiological_Protection\|Take me back to the ICRP's [[Guide_to_the_System_of_Radiological_Protection\|Guide to the System of Radiological Protection]]!]]		[[File:ICRPGuide.JPG\|150px\|thumb\|right\|link=Guide_to_the_System_of_Radiological_Protection\|Take me back to the ICRP's [[Guide_to_the_System_of_Radiological_Protection\|Guide to the System of Radiological Protection]]!]]

−
−	~~Introduction~~

	==Exposure Categories and Situations==		==Exposure Categories and Situations==

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 <br>
 ! style="width: 30%;" | Type of Dose Limit
 ! style="width: 30%;" | Limit on Dose from [[System_of_radiation_protection_module_2#Exposure Categories and Situations | Occupational Exposure]]

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 | n/a
 |}
 ==Radiation Dose==

← Older revision		Revision as of 15:54, 24 October 2019
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	The tissue weighting factors are needed because different organs have different levels of sensitivity to radiation, even if the equivalent dose is the same. Effective dose is expressed in sieverts (Sv), or, more frequently, millisieverts (mSv) which are 1/1000th of a sievert. This is the most frequently used dose in radiological protection. Unless you see mention of a specific organ, a "dose" in Sv or mSv is the effective dose. In the simplest cases, for uniform whole-body exposure to gamma (photon) or beta (electron) radiation, the radiation weighting factor is 1, and the tissue weighting factors add up to 1, and therefore, for example, an absorbed dose of 1 mGy equals an effective dose of 1 mSv.		The tissue weighting factors are needed because different organs have different levels of sensitivity to radiation, even if the equivalent dose is the same. Effective dose is expressed in sieverts (Sv), or, more frequently, millisieverts (mSv) which are 1/1000th of a sievert. This is the most frequently used dose in radiological protection. Unless you see mention of a specific organ, a "dose" in Sv or mSv is the effective dose. In the simplest cases, for uniform whole-body exposure to gamma (photon) or beta (electron) radiation, the radiation weighting factor is 1, and the tissue weighting factors add up to 1, and therefore, for example, an absorbed dose of 1 mGy equals an effective dose of 1 mSv.

		+	'''[[#Top\|Back to Top]]'''

	==Dose Limits==		==Dose Limits==

← Older revision		Revision as of 15:54, 24 October 2019
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	Dose limits do not apply to [[System_of_radiation_protection_module_2#Exposure Categories and Situations \| medical exposures]]. If they did, the effectiveness of diagnosis or treatment might be reduced, doing more harm than good for the patient. The emphasis is on justification of medical procedures and optimisation of protection.		Dose limits do not apply to [[System_of_radiation_protection_module_2#Exposure Categories and Situations \| medical exposures]]. If they did, the effectiveness of diagnosis or treatment might be reduced, doing more harm than good for the patient. The emphasis is on justification of medical procedures and optimisation of protection.
		+
		+	'''[[#Top\|Back to Top]]'''
		+
		+
		+	[[File:ICRPGuide.JPG\|50px\|link=Guide_to_the_System_of_Radiological_Protection]]Take me back to the ICRP's [[Guide_to_the_System_of_Radiological_Protection\|Guide to the System of Radiological Protection]]!

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 [[#top| ]]
 __FORCETOC__
-[[File:ICRPGuide.JPG|150px|thumb|right|link==Guide_to_the_System_of_Radiological_Protection|Take me back to the ICRP's [[Guide_to_the_System_of_Radiological_Protection|Guide to the System of Radiological Protection]]!]]
+[[File:ICRPGuide.JPG|150px|thumb|right|link=Guide_to_the_System_of_Radiological_Protection|Take me back to the ICRP's [[Guide_to_the_System_of_Radiological_Protection|Guide to the System of Radiological Protection]]!]]