Thyroid Tomography Using a Seven Pinhole Collimator



In this paper we discuss a new application of the seven pinhole (7-P) collimator: tomographic imaging of the thyroid. The collimator has been re-optimized for this purpose by diminishing the distance from the aperture plate to the crystal and by choosing a smaller diameter for the pinholes. The reconstruction technique employed is the same as introduced by us for 7-P tomography of the heart [1]. This combination of imaging system and reconstruction method produces images of good quality and high resolution. Therefore, it seems to offer a promising alternative to conventional planar imaging (using a single pinhole or a parallel-hole collimator).


Point Source Line Source Cold Spot Pinhole Collimator Intrinsic Resolution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Van Giessen, J.W., Viergever, M.A. and de Graaf, C.N. (1985). Improved tomographic reconstruction in seven-pinhole imaging, IEEE Trans. Med. Im. 4, 91–103.CrossRefGoogle Scholar
  2. 2.
    Vogel, R.A., Kirch, D.L., LeFree, M.T. and Steele, P.P. (1978). Anew method of multiplanar emission tomography using a seven pinhole collimator and an Anger scintillation camera, J. Nucl. Med. 19, 648–654.PubMedGoogle Scholar
  3. 3.
    LeFree, M.T.,Vogel, R.A., Kirch, D.L. and Steele, P.P. (1981). Seven pinhole tomography — A technical description, J. Nucl. Med. 22, 48–54.PubMedGoogle Scholar
  4. 4.
    Herman, G.T. (1975). A relaxation method for reconstructing objects from noisy X-rays, Math. Programming 8, 1–19.CrossRefGoogle Scholar

Copyright information

© Martinus Nijhoff Publishers, Dordrecht 1986

Authors and Affiliations

  1. 1.Delft University of TechnologyThe Netherlands
  2. 2.University Hospital UtrechtThe Netherlands

Personalised recommendations