Attention
The aim of the Dose Datamed II workshop in Athens was to present preliminary
data, collect feedback from the audience and to work towards final results
and conclusions.
Therefore, all the data and statements made in this presentation are preliminary
and might change in the future.
Please use the data with care and indicate its preliminary character!
We would appreciate any feedback made based on the data presented with an
email at:
[email protected]
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
European database for
population dose registration
and follow-up
Andreas Jahnen and Ralf Herbst
CRP Henri Tudor
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Introduction and Objective
The aim of the population dose database is the support of the evaluation of
the collected data and to enable a continuous follow-up and update of
population doses in Europe. Furthermore, it should be possible to compare
and analyse trends during follow-up projects
In this talk:
- Introduction, objective and current status of the DDmedDB
- Technical implementation
- Result
- Request for feedback
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Data collection and evaluation process
(1) National contact points provide data to the project team using the general
and detailed online questionnaires and the associated xray and NM Excel
files.
(2) Submitted data is checked (quality assurance) and feedback is asked to
the national contact points if facts have been unclear.
(3) Quality checked data is introduced into the DDmedDB.
(4) Selected views are exported dynamically to the Dose Datamed II web site
at http://ddmed.eu
(5) To support the evaluation and the the report writing, data is exported from
the database in the database source file. These file contains different sheets
that are then linked for further analysis and chart generation within MS Excel.
(6) The generated charts are included into the report. Addtional comments
and an evaluation is added to the respective sections.
This process is repeated periodically to account for feedback from the
national contact points and to added new views based on the current status
of the evaluation process.
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
DDmedDB: Technology and Design
Technical requirements for a modern database is low (35 * 20 examinations
= 700 entries; “answers” table = 36888 entries).
The database is implemented using a PostgreSQL database server. Only
standard complaint features are used: The database can be run as well on
other relational database systems (Oracle, SQL Server, MySQL,...).
The database is implemented using an Entity-Relationship (ER) model: Data
is organized in entities and associated relations. The database ensures that
data can be retrieved in a consist (correct) way due to the underlying
mathematical model.
Central is the entity “country” and “study” that links all data elements. The
dose data is organized in dedicated database tables (xray_top20, xray_72,
xray_225,...). The data from the general and detailed questionnaire is
organized in an Entity-Value Representation (EVR). This allows an more
flexible storage of information, if the next questionnaire is carried out slightly
different.
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
DDmedDB: Database Views
To support the data evaluation, different database views have been implemented.
A database view organizes the data in the database to show specific aspects of
the collected data. The following views are available (examples):
- equipment:
Equipment available in the different countries.
- healthcareproviders:
type and number of healthcare providers in Europe.
- petct:
Has PET-CT increasingly used in your country [Y,N,UNK]
- professionals:
Overview of healthcare professionals in Europe
- submission_status:
Status and date the countries provided the data.
- nm_frequencies:
Lists the TOP 28 NM examination frequencies.
- nm_meanactivity:
Lists the TOP 28 NM mean activities.
- top20_collectiveeffectivedosepermillion: x-ray top20 overview of the collective effective
dose per million.
- top20_frequencies:
x-ray top20 overview of the frequencies per million.
- top20_meaneffectivedoses: x-ray top20 overview of the mean effective dose.
- top20_uncertainties:
x-ray top20 overview of the uncertainties.
- ...
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
DDmedDB: Database View
TOP20 mean effective dose
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
DDmedDB: Access to the database
The dynamic diagrams are implemented using the Open Source AM Charts
library [1]. They following diagrams are available at http://ddmed.eu:
- TOP20 Frequency by Examination Category
- TOP20 Mean Effective Dose per Examination Category
- TOP20 Collective Effective Dose per Examination Category
- X-RAY Diagnostic Reference Level Map
- NM Diagnostic Reference Level Map
A limited number of graphs will be prepared.
We would appropriate feedback, on
what you would like to see here.
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Conclusions and the future
The database contains all the data collected during the data collection of the
project:
- It was designed to support several data sets (from additional studies). This will
allow a future project to easily compare the collected data and calculate trends.
- During data evaluation the database has proven to be a valuable tool.
- Ongoing development (Views, Interactive web charts)
Some work will need to be performed as a new data collection might work using a
slightly modified questionnaire or Excel template to collect the data (Database
Importer). Furthermore, the views that compare the data needs to be developed
(Database Exporter).
The maintenance is of the database is guaranteed by the Dose Datamed II
consortium during the project duration. Discussions have been started to discuss
the future of this database.
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece
Feedback
Thank you very much for your attention!
Workshop on European Population Doses from Medical Exposure
24-26 April 2012, Athens, Greece