Determination of the Attenuation Map in Emission Tomography
2003年2月1日 · Reliable attenuation correction methods for emission tomography require determination of an attenuation map, which represents the spatial distribution of linear attenuation coefficients for the region of the patient’s anatomy that is …
Determination of the attenuation map in emission tomography
This article presents the physical and methodologic basis of attenuation correction and summarizes recent developments in algorithms used to compute the attenuation map in ECT. Other potential applications are also discussed.
Attenuation Correction of PET/MR Imaging - PMC - PubMed …
PET attenuation correction methods require knowledge of the spatial distribution of tissue attenuation coefficients within the PET field of view. This information is represented in the form of an attenuation map (a.k.a. μ map) whose intensities represent the LAC values.
MRI for attenuation correction in PET: methods and challenges
Various approaches have been developed based on templates, atlas information, direct segmentation of T1-weighted MR images, or segmentation of images from special MR sequences. The advantages and disadvantages of these approaches as well as additional challenges will be discussed in this review.
Reliable attenuation correction methods for quantitative emis- sion CT (ECT) require accurate delineation of the body contour and often necessitate knowledge of internal anatomic structure.
Deep-learning-based attenuation map generation in kidney …
2024年10月12日 · This study aimed to establish a CT-free quantification technology in kidney SPECT imaging using deep learning to generate synthetic attenuation maps (μ-maps) from SPECT data, thereby reducing radiation exposure and eliminating the need for CT scans.
Attenuation map estimation with SPECT emission data only
2009年9月1日 · In this paper, we propose a new method to estimate the attenuation map using the data consistency conditions of the attenuated Radon transform. It is based on deriving boundaries of the constant regions of the true attenuation map using an iterative algorithm.
Generating Attenuation Map for SPECT-only systems using …
2019年5月1日 · Conclusions: We developed a 3D model using a deep CNN with GAN training to estimate attenuation maps for SPECT directly and solely from the emission data.
Joint reconstruction of activity and attenuation map using LM …
In this paper, we investigate the possibility of joint reconstruction of the activity and attenuation map using list-mode (LM) SPECT emission data, including the scattered-photon data. We propose a path-based formalism to process scattered-photon data.
In this paper, we propose a new 3-D attenuation map from patient Computed Tomography (CT) exams. The reconstruction is based on the analytic filtered back projection (FBP) algorithm.
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