Navigation Links
PTB testing method for finger ring dosemeters has proven its effectiveness
Date:6/20/2008

This release is available in German.

Finger ring dosemeters are used at diverse workplaces having ionizing radiation, e.g. in medicine and industry, in order to check whether the effective dose limt values are adhered to. The dosemeters used to measure beta radiation have been subjected to an annual quality control by the PTB for six years now. Since then, all dosimeter models used in Germany have passed these controls.

In Germany, for persons who are occupationally exposed to radiation, monitoring with personal dose equivalent meters is legally prescribed. Besides the whole-body dosimeters which are to be worn on the trunk, also passive extremity dosimeters are used which are often worn around the fingers. Extremity dosimeters are used for beta radiation measurements, especially in medicine. All dosimeters of this type are released and assessed by dosimetry services. PTB is thereby responsible for quality control. Quality control takes place in two stages:

In the first stage, the designs are submitted to a thorough check with regard to their properties before the dosimeter is released for use. In the case of beta dosimeters, this control is carried out according to a directive.

In the second stage, the routine operation is checked yearly at the dosimetry services via so-called "periodic comparison measurements". The dosimeters are thereby exposed by PTB to a well known dose - which we we will call HPTB in the following. Then, the dosimetry services analyse the dosimeters and determine their measured value, HDST, of course without knowing the value of HPTB. As a measure of quality, the quotient HDST/HPTB is used which is 1.0 for an ideal dosimeter. The figure shows the values of these quotients in relation with the dose for all comparison measurements which have been carried out with beta radiation up to now. The lines plotted indicate the admissible limits for this quotient. Due to the requirements of radiation protection, these limits narrow towards high doses.

The condition for passing the yearly comparison measurements is that 90% of all quotients for each design of a service lie within these limits. If this requirement is not met by one dosimeter design for the comparison measurement, a repetition is carried out for this dosimeter. This has never been the case up to now. In summary, one can say that this type of two-stage quality control is particularly efficient.


'/>"/>

Contact: Dr. Rolf Behrens
rolf.behrens@ptb.de
49-531-592-6340
Physikalisch-Technische Bundesanstalt (PTB)
Source:Eurekalert  

Related medicine news :

1. Quest Diagnostics to Provide Diagnostic Testing Services for the Women of Ireland through Irelands First Nationwide Cervical-Cancer Screening Program
2. Study: Medicare Competitive Bidding Program Could Impede Seniors Access to Diabetes Testing Supplies
3. Plaintiffs Lawyer Orders Lead Testing on 3 Popular Herbalife Products; Results Show 728% More Lead Than Allowed by Law Under Proposition 65 Violation
4. New WaveSense Presto(TM) and Pro(TM) Glucose Meters to Simplify Testing
5. Genetic testing in newborns and children: Ethical issues affecting families and physicians
6. Doctor Diabetic Supply Awarded by Medicare to Provide Mail-Order Diabetic Testing Supplies in 10 Metropolitan Areas
7. Seminar on Allergies: Testing and Treatment Options
8. Research shows HPV testing offers women protection for twice as long as smear testing
9. Stored Ovarian Tissue Needs Testing Before Re-Implantation
10. Cancer could return unless stored ovarian tissue undergoes adequate testing before re-implantation
11. UT Southwestern testing new hybrid hearing device combining advantages of hearing aids, implants
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
PTB testing method for finger ring dosemeters has proven its effectiveness
(Date:2/24/2017)... TX (PRWEB) , ... February 24, 2017 , ... ... offering promotions on tooth replacement options at his office, Antoine Dental Center. Currently, ... implants for $18,499. Some restrictions may apply, but patients can learn more about ...
(Date:2/24/2017)... , ... February 24, 2017 , ... ... of Liberty University, has officially announced the appointment of Peter A. Bell, DO, ... of Osteopathic Medicine (LUCOM), beginning April 10. Dr. Bell comes to Liberty ...
(Date:2/24/2017)... ... February 24, 2017 , ... Healthcare Associates of McKinney ... Craig Ranch building at 8080 State Highway 121, Suite 210, McKinney, Texas 75070. ... to Highway 121. , As the practice has grown, the need for more space ...
(Date:2/24/2017)... ... February 24, 2017 , ... Yisrayl Hawkins, Pastor and Overseer at The House ... present generation. Yisrayl makes an astounding statement when he says that the entire ... the Bible details the current times so plainly that anyone should be able to ...
(Date:2/24/2017)... ... February 24, 2017 , ... Rosica ... in thought leadership , media relations, social media, content marketing and SEO, ... be powered through Act-On, an intuitive marketing automation platform. , Rosica will now ...
Breaking Medicine News(10 mins):
(Date:2/24/2017)... 2017  Directors from Pharma To Market Pty Ltd and Ador ... resulting in the founding of Pharma To Market Pte Ltd, based ... are pleased to announce their expansion into Asia ... . The company are delighted to appoint Joelle Chia ... Singapore based entity. Joelle brings with her an ...
(Date:2/24/2017)... , Feb. 23, 2017 ... insights on the various drugs being developed ... covers all the drugs that are in ... Clinical). The pipeline focuses on novel pharmacologic ... antibodies, stem cell therapies, recombinant proteins and ...
(Date:2/24/2017)... STOCKHOLM , Feb 24, 2017 ... Nomination Committee,s proposal for a new Board of Directors ... Meeting. The 2016-2017 Nomination Committee comprises representatives of the ... third quarter of 2016 who have accepted a seat ... Board. The composition of the 2016-2017 Nomination Committee was ...
Breaking Medicine Technology: