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Image distortion and correction in single photon emission CT.
1Department of Electronic Informatics, Faculty of Engineering, Hosei University, Koganei, Tokyo, Japan. ogawa@k.hosei.ac.jp
Annals of Nuclear Medicine
|July 6, 2004
Summary
Single Photon Emission Computed Tomography (SPECT) images are distorted by factors like scattering and attenuation, hindering quantitative analysis. This review details these distortions and outlines methods to correct them for improved medical imaging.
Area of Science:
- Medical Imaging
- Nuclear Medicine
- Radiopharmaceuticals
Background:
- Single Photon Emission Computed Tomography (SPECT) visualizes organ function using radiopharmaceuticals.
- Quantitative SPECT imaging is challenging due to distortions in projection data.
Purpose of the Study:
- To classify causes of distortion in SPECT images.
- To describe methods for correcting SPECT image distortions.
Main Methods:
- Review of factors affecting SPECT projection data.
- Classification of image distortion causes.
- Description of correction techniques.
Main Results:
- Identified key factors causing SPECT image distortion: attenuation, scattering, collimator aperture, acquisition methods, organ motion, and radiopharmaceutical washout.
- Categorized these factors to provide a structured overview.
Conclusions:
- Accurate quantitative SPECT imaging requires addressing multiple distortion sources.
- Understanding and correcting these distortions is crucial for reliable diagnostic information.