• Publications
  • Influence
Methods for identification of images acquired with digital cameras
From the court we were asked whether it is possible to determine if an image has been made with a specific digital camera. This question has to be answered in child pornography cases, where evidenceExpand
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Image matching algorithms for breech face marks and firing pins in a database of spent cartridge cases of firearms.
On the market several systems exist for collecting spent ammunition data for forensic investigation. These databases store images of cartridge cases and the marks on them. Image matching is used toExpand
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  • 3
Automatic verification of radiation field shape using digital portal images.
Two computer methods for matching digital line drawings have been tested for automatic on-line verification of the radiation field shape during radiotherapy. This work is part of a research programExpand
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Maximizing setup accuracy using portal images as applied to a conformal boost technique for prostatic cancer.
A design procedure of a patient setup verification protocol based upon frequent digital acquisition of portal images is demonstrated with an application for conformal prostatic boost fields. TheExpand
  • 149
  • 1
A method for the measurement of field placement errors in digital portal images.
Correct placement of radiation fields relative to patient anatomy is essential in radiotherapy in order to minimise serious side effects to reduce the probability of recurrence of the tumour. One wayExpand
  • 46
  • 1
Radiation field edge detection in portal images.
In fractionated radiation therapy with high energy photon beams, patient set-up is verified by analysing the position of the radiation field relative to the patient anatomy. This analysis isExpand
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Three-dimensional verification of patient placement during radiotherapy using portal images.
  • J. Bijhold
  • Physics, Medicine
  • Medical physics
  • 1 March 1993
The use of a single portal image for the three-dimensional verification of patient placement during radiotherapy has been investigated. In this study, a deviation in the patient positioning isExpand
  • 65
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Pattern recognition in a database of cartridge cases
Several systems exist for collecting spent ammunition for forensic investigation. These databases store images of cartridge cases and the marks on them. The research in this paper is focused on theExpand
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  • 1
Use of Correlation algorithms in a database of spent cartridge cases of firearms
On the market several systems exist for collecting spent ammunition for forensic investigation. These databases store images of cartridge cases and the marks on them. The research in this paper isExpand
  • 4
  • 1
Fast evaluation of patient set-up during radiotherapy by aligning features in portal and simulator images.
A new fast method is presented for the quantification of patient set-up errors during radiotherapy with external photon beams. The set-up errors are described as deviations in relative position andExpand
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