Influencia del movimiento respiratorio sobre el contraste de las lesiones en estudios de perfusión pulmonar: simulación mediante el uso de un fantoma virtual

Translated title of the contribution: Influence of respiratory movement on the contrast of lesions in lung perfusion studies: simulation using a virtual phantom

Margarita Núñez, Jorge Cánepa, Omar Alonso, Brian F. Hutton, Fernando Mut

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Abstract

Respiratory motion (R M) represents a major factor of image degradation with potential impact on the detection of embolic lesions in lung perfusion scintigraphy. The aim was to investigate the influence of RM on the contrast of pulmonary lesions through a simulation study with a virtual phantom. Using a N-CAT phantom, a SPECT lung perfusion model was generated; the model was reconstructed producing three sets of tomographic slices and image reprojection under different conditions: without RM, RM simulation with 2 cm diaphragmatic displacement, and RM simulation with 4 cm diaphragmatic displacement. Seven "cold" lesions were placed in the model resembling a typical pulmonary embolism (PE) situation in superior, medial and basal locations and image contrast was calculated. Results showed a decrease in lesion contrast proportional to the degree of RM, which was more pronounced for basal lesions. Motion correction could improve the detectability of some perfusion defects, especially those in basal locations, thus incrementing the sensitivity of the technique for the diagnosis of PE.
Translated title of the contributionInfluence of respiratory movement on the contrast of lesions in lung perfusion studies: simulation using a virtual phantom
Original languageSpanish
Pages (from-to)1-6
Number of pages6
JournalALASBIMN Journal: revista de medicina nuclear
Volume12
Issue number49
Publication statusPublished - 2010
Externally publishedYes

Bibliographical note

Copyright the Publisher 2010. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • lung perfusion
  • SPECT
  • respiratory motion

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