Attenuation Correction of PET/MR Imaging
نویسندگان
چکیده
منابع مشابه
Importance of Attenuation Correction (AC) for Small Animal PET Imaging.
UNLABELLED The purpose of this study was to investigate whether a correction for annihilation photon attenuation in small objects such as mice is necessary. The attenuation recovery for specific organs and subcutaneous tumors was investigated. A comparison between different attenuation correction methods was performed. METHODS Ten NMRI nude mice with subcutaneous implantation of human breast ...
متن کاملEvaluation of attenuation correction process in cardiac SPECT images
Introduction: Attenuation correction is a useful process for improving myocardial perfusion SPECT and is dependent on activity and distribution of attenuation coefficients in the body (attenuation map). Attenuation artifacts are a common problem in myocardial perfusion SPECT. The aim of this study was to compare the effect of attenuation correction using different a...
متن کاملHalf-time SPECT myocardial perfusion imaging with attenuation correction.
UNLABELLED Reducing acquisition time may improve patient throughput, increase camera efficiency, and reduce costs; reducing acquisition time also increases image noise. Newly available software controls the effects of noise by maximum a posteriori reconstruction while maintaining resolution with resolution-recovery methods. This study compares half-time (HT) gated myocardial SPECT images proces...
متن کاملMagnetic resonance-based attenuation correction for PET/MR hybrid imaging using continuous valued attenuation maps.
OBJECTIVES Attenuation correction of positron emission tomographic (PET) data is critical in providing accurate and quantitative PET volumes. Deriving an attenuation map (μ-map) from magnetic resonance (MR) volumes is a challenge in PET/MR hybrid imaging. The difficulty lies in differentiating cortical bone from air from standard MR sequences because both these classes yield little to no MR sig...
متن کاملAttenuation Correction Procedures
The nondestructive assay (NDA) of nuclear material must deal with large sample sizes and high self-absorption. Typical containers range from 2-L bottles to 220-L drums, and even a small sample with a high concentration of nuclear material has significant self-attenuation. Although gamma-ray self-attenuation may frequently be ignored in the filter papers or small vials encountered in radiochemic...
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ژورنال
عنوان ژورنال: Magnetic Resonance Imaging Clinics of North America
سال: 2017
ISSN: 1064-9689
DOI: 10.1016/j.mric.2016.12.001