title: DICOM Metadata repository for technical information in digital medical images.
abstract: The diagnostic medical image contains, apart from the pixel data, a detailed description of how the image was produced. The information reveals details on image geometry, radiation data as well as more complex quality index in a varying degree, mostly dependent on the age of the equipment. There is no simple way to retrieve, process and display this data in a general image workstation.
  
  
  METHODS
  Since November 2004 a DICOM metadata repository has been used to record image header parameters. The automated data extraction, storage and display are based on simple standard programming and have performed without malfunction since the start, today containing metadata from 18 million images.
  
  
  RESULTS
  The data in the metadata repository has been used in dose optimization for a Computed Radiography image plate system, analyzing the exposure index and making use of the possibilities to organize the data in examinations, projections as well as examination rooms. Analysis of exposure index in the context of these parameters shows promising qualities as it makes detection of dosimetric problems as well as follow-up of dose adjustments simpler. Current work is aimed at creating a vendor independent platform and to further develop methods to support dose optimization for flat panel direct digital detectors and computed tomography (CT) systems. The possibilities to detect equipment malfunction will be further investigated.
authors: Radiologi Dalarna, Falun, Sweden. hans-erik.kallman@ltdalarna.se
authors: Hans-Erik
authors: HE
authors: Källman
authors: Erik
authors: E
authors: Halsius
authors: Magnus
authors: M
authors: Olsson
authors: Mats
authors: M
authors: Stenström
mesh_terms: D000465:Algorithms; D002138:Calibration; D016208:Databases, Factual; D006801:Humans; D046609:Libraries, Digital; D008954:Models, Biological; D011835:Radiation Protection; D011856:Radiographic Image Enhancement / Q000379:methods; D011873:Radiology Information Systems; D011879:Radiotherapy Dosage; D013679:Technology, Radiologic / Q000379:methods; D015898:Tomography Scanners, X-Ray Computed