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Area of Science:

  • Nuclear Medicine
  • Radiology
  • Pulmonary Medicine

Background:

  • Lung scintigraphy has been a cornerstone in pulmonary diagnostics for over six decades.
  • Technological advancements have transformed it into a tomographic modality, utilizing SPECT/CT for improved imaging.
  • Modern lung scanning assesses ventilation (V) and perfusion (Q) with technetium-99m radiolabeled agents.

Purpose of the Study:

  • To highlight the evolution of lung scintigraphy into a sophisticated diagnostic tool.
  • To emphasize the role of SPECT/CT in improving the accuracy of pulmonary embolism (PE) diagnosis.
  • To discuss the expanded applications of lung scanning beyond PE detection, including functional assessment and surgical guidance.

Main Methods:

  • Utilizing SPECT imaging for both ventilation and perfusion assessment.
  • Integrating low-dose CT with SPECT for anatomical correlation.
  • Employing technetium-99m radiolabeled agents for V/Q imaging.

Main Results:

  • SPECT/CT enhances the sensitivity and specificity of lung scanning for PE.
  • Lung scanning now assesses regional lung function and V/Q matching for gas exchange.
  • Diagnostic accuracy for PE exceeds 95% with minimal indeterminate reports.

Conclusions:

  • Lung scintigraphy, particularly SPECT/CT, remains a highly effective diagnostic tool for pulmonary embolism.
  • The modality's utility extends to evaluating regional lung function and guiding interventions.
  • Despite challenges like artifacts, experienced interpretation yields high diagnostic confidence.