Impact of different metal artifact reduction techniques on attenuation correction in 18F-FDG PET/CT examinations
نویسندگان
چکیده
منابع مشابه
Occurrence of an artifact in brain 18F-FDG PET with calculated attenuation correction.
In infants, brain (18)F-FDG PET often requires sedation. To keep the sedation mild, the PET acquisition time should be kept short. Therefore, calculated attenuation correction is often preferred to measured attenuation correction. In addition, the infant should be positioned as comfortably as possible. Here, we report a case in which the infant's fist was near her head, resulting in severe arti...
متن کاملImpact of attenuation correction on clinical [18F]FDG brain PET in combined PET/MRI
BACKGROUND In PET/MRI, linear photon attenuation coefficients for attenuation correction (AC) cannot be directly derived, and cortical bone is, so far, usually not considered. This results in an underestimation of the average PET signal in PET/MRI. Recently introduced MR-AC methods predicting bone information from anatomic MRI or proton density-weighted zero-time imaging may solve this problem ...
متن کاملMetal artifact reduction strategies for improved attenuation correction in hybrid PET/CT imaging.
Metallic implants are known to generate bright and dark streaking artifacts in x-ray computed tomography (CT) images, which in turn propagate to corresponding functional positron emission tomography (PET) images during the CT-based attenuation correction procedure commonly used on hybrid clinical PET/CT scanners. Therefore, visual artifacts and overestimation and/or underestimation of the trace...
متن کاملEvaluation of Metal Artifact Reduction software in Computed Tomography
Introduction: The image quality of computed tomography (CT) can be seriously lowered by metal implants of patients. These implants are known to exert a significant impact on diagnostic accuracy due to artifacts. The current study aimed to assess the usefulness of Metal Artifact Reduction (MAR) software in the reduction of metal artifacts, in comparison to iterative rec...
متن کاملMetal Artifact Reduction in CT via Ray Profile Correction
In computed tomography (CT), metal implants increase the inconsistencies between the measured data and the linear assumption made by the analytical CT reconstruction algorithm. The inconsistencies appear in the form of dark and bright bands and streaks in the reconstructed image, collectively called metal artifacts. The standard method for metal artifact reduction (MAR) replaces the inconsisten...
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ژورنال
عنوان ژورنال: The British Journal of Radiology
سال: 2020
ISSN: 0007-1285,1748-880X
DOI: 10.1259/bjr.20190069