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Small animal imaging with pinhole single-photon emission computed tomography

Strand, Sven-Erik LU ; Ivanovic, M; Erlandsson, K; Franceschi, D; Button, T; Sjogren, K and Weber, D A (1994) In Cancer 73(Suppl. 3). p.981-984
Abstract
BACKGROUND. High resolution spatial details of the distribution of activity in three dimensions is required to evaluate the localization and dosimetric properties of radiolabelled monoclonal antibodies in tumors and normal tissues. Planar imaging of small animals with a resolution of 5-10 mm is usually the imaging modality of choice. The authors investigated high resolution single-photon emission computed tomographic (SPECT) imaging, based on a rotating pinhole scintillation camera. Although the sensitivity of the pinhole collimator is low, several radionuclides offer suitable decay properties to perform pinhole SPECT, especially in conjunction with high activity levels used in radioimmunotherapy. METHODS. Transverse, sagittal, and coronal... (More)
BACKGROUND. High resolution spatial details of the distribution of activity in three dimensions is required to evaluate the localization and dosimetric properties of radiolabelled monoclonal antibodies in tumors and normal tissues. Planar imaging of small animals with a resolution of 5-10 mm is usually the imaging modality of choice. The authors investigated high resolution single-photon emission computed tomographic (SPECT) imaging, based on a rotating pinhole scintillation camera. Although the sensitivity of the pinhole collimator is low, several radionuclides offer suitable decay properties to perform pinhole SPECT, especially in conjunction with high activity levels used in radioimmunotherapy. METHODS. Transverse, sagittal, and coronal sections were reconstructed using a three-dimensional cone-beam algorithm, which is a generalization of the two-dimensional fan-beam filtered backprojection algorithm. Before reconstruction, the pinhole projections were corrected for the decay of the radionuclide, geometric and intrinsic efficiency variations of the camera system, and center of rotation shift. RESULTS. The spatial resolution at 50 mm from the pinhole collimator with 3.3 mm aperture was 3.4 mm, and the sensitivity 7.2 c/s microCi for technetium-99m. With the 2 mm collimator the resolution was 2.2 mm, and the sensitivity was 2.6 c/s/microCi. To show the spatial resolution in vivo, a rat was injected with 185 MBq of technetium-99m-methylene diphosphonate or with 5 mCi technetium-99m-hexamethylpropylene amine oxime. The bone structures were well delineated in the methylene diphosphonate image, and in the hexamethylpropylene amine oxime image, the brain was nicely shown. For comparison a magnetic resonance image for the same section was done. CONCLUSIONS. High resolution SPECT imaging with the pinhole collimator provides mapping of the activity in three-dimensions, needed for more detailed biodistribution data and to perform more accurate dosimetry. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
single-photon emission computed tomography, scintillation camera, pinhole collimator, cone-beam tomography, pinhole single-photon emission computed tomography, high resolution, radionuclides, methylene diphosphonate, hexamethylpropylene amine oxime, monoclonal antibodies
in
Cancer
volume
73
issue
Suppl. 3
pages
981 - 984
publisher
John Wiley & Sons
external identifiers
  • pmid:8306288
  • scopus:0027979319
ISSN
1097-0142
DOI
10.1002/1097-0142(19940201)73:3+<981::AID-CNCR2820731334>3.0.CO;2-N
language
English
LU publication?
yes
id
a74a8c6f-b24f-4126-b54e-f25fa6b12f60 (old id 1108712)
date added to LUP
2008-07-24 15:38:05
date last changed
2017-02-19 03:36:49
@article{a74a8c6f-b24f-4126-b54e-f25fa6b12f60,
  abstract     = {BACKGROUND. High resolution spatial details of the distribution of activity in three dimensions is required to evaluate the localization and dosimetric properties of radiolabelled monoclonal antibodies in tumors and normal tissues. Planar imaging of small animals with a resolution of 5-10 mm is usually the imaging modality of choice. The authors investigated high resolution single-photon emission computed tomographic (SPECT) imaging, based on a rotating pinhole scintillation camera. Although the sensitivity of the pinhole collimator is low, several radionuclides offer suitable decay properties to perform pinhole SPECT, especially in conjunction with high activity levels used in radioimmunotherapy. METHODS. Transverse, sagittal, and coronal sections were reconstructed using a three-dimensional cone-beam algorithm, which is a generalization of the two-dimensional fan-beam filtered backprojection algorithm. Before reconstruction, the pinhole projections were corrected for the decay of the radionuclide, geometric and intrinsic efficiency variations of the camera system, and center of rotation shift. RESULTS. The spatial resolution at 50 mm from the pinhole collimator with 3.3 mm aperture was 3.4 mm, and the sensitivity 7.2 c/s microCi for technetium-99m. With the 2 mm collimator the resolution was 2.2 mm, and the sensitivity was 2.6 c/s/microCi. To show the spatial resolution in vivo, a rat was injected with 185 MBq of technetium-99m-methylene diphosphonate or with 5 mCi technetium-99m-hexamethylpropylene amine oxime. The bone structures were well delineated in the methylene diphosphonate image, and in the hexamethylpropylene amine oxime image, the brain was nicely shown. For comparison a magnetic resonance image for the same section was done. CONCLUSIONS. High resolution SPECT imaging with the pinhole collimator provides mapping of the activity in three-dimensions, needed for more detailed biodistribution data and to perform more accurate dosimetry.},
  author       = {Strand, Sven-Erik and Ivanovic, M and Erlandsson, K and Franceschi, D and Button, T and Sjogren, K and Weber, D A},
  issn         = {1097-0142},
  keyword      = {single-photon emission computed tomography,scintillation camera,pinhole collimator,cone-beam tomography,pinhole single-photon emission computed tomography,high resolution,radionuclides,methylene diphosphonate,hexamethylpropylene amine oxime,monoclonal antibodies},
  language     = {eng},
  number       = {Suppl. 3},
  pages        = {981--984},
  publisher    = {John Wiley & Sons},
  series       = {Cancer},
  title        = {Small animal imaging with pinhole single-photon emission computed tomography},
  url          = {http://dx.doi.org/10.1002/1097-0142(19940201)73:3+<981::AID-CNCR2820731334>3.0.CO;2-N},
  volume       = {73},
  year         = {1994},
}