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Annals of Nuclear Medicine

, Volume 21, Issue 3, pp 175–183 | Cite as

Respiratory lung motion analysis using a nonlinear motion correction technique for respiratory-gated lung perfusion SPECT images

  • Hidenori UeEmail author
  • Hideaki Haneishi
  • Hideyuki Iwanaga
  • Kazuyoshi Suga
Original Articles

Abstract

Objective

This study evaluated the respiratory motion of lungs using a nonlinear motion correction technique for respiratory-gated single photon emission computed tomography (SPECT) images.

Methods

The motion correction technique corrects the respiratory motion of the lungs nonlinearly between two-phase images obtained by respiratory-gated SPECT. The displacement vectors resulting from respiration can be computed at every location of the lungs. Respiratory lung motion analysis is carried out by calculating the mean value of the body axis component of the displacement vector in each of the 12 small regions into which the lungs were divided. In order to enable inter-patient comparison, the 12 mean values were normalized by the length of the lung region along the direction of the body axis.

Results

This method was applied to 25 Technetium (Tc)-99m-macroaggregated albumin (MAA) perfusion SPECT images, and motion analysis results were compared with the diagnostic results. It was confirmed that the respiratory lung motion reflects the ventilation function. A statistically significant difference in the amount of the respiratory lung motion was observed between the obstructive pulmonary diseases and other conditions, based on an unpaired Student's t test (P < 0.0001).

Conclusions

A difference in the motion between normal lungs and lungs with a ventilation obstruction was detected by the proposed method. This method is effective for evaluating obstructive pulmonary diseases such as pulmonary emphysema and diffuse panbronchiolitis.

Key words

Respiratory-gated imaging Single photon emission computed tomography Motion correction Motion analysis 

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Copyright information

© The Japanese Society of Nuclear Medicine 2007

Authors and Affiliations

  • Hidenori Ue
    • 1
    Email author
  • Hideaki Haneishi
    • 1
    • 2
  • Hideyuki Iwanaga
    • 3
  • Kazuyoshi Suga
    • 3
  1. 1.Haneishi LaboratoryGraduate School of Science and Technology, Chiba UniversityChibaJapan
  2. 2.Research Center for Frontier Medical EngineeringChiba UniversityChibaJapan
  3. 3.Department of RadiologyYamaguchi UniversityYamaguchiJapan

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