Attenuation Correction
Reliability and advantages of using non-uniform Chang’s attenuation correction method using a CT-based attenuation coefficient map in 99mTc-GSA SPECT/CT hepatic imaging
... Tc-GSA SPECT/computed tomography (CT) imaging is used for evaluation of the regional hepatic functional reserve. Many quantitative indices for the regional hepatic functional reserve have been applied clinically [2, 3]. ...
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Attenuation correction for a high-resolution polarimetric X-band weather radar
... a correction for attenuation for polarimet- ric weather radar data at X-band, Chandra et ...phase-constraint attenuation correction method with imposed self-consistency, Gorgucci and Bal- dini ...
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Evaluation of zero-echo-time attenuation correction for integrated PET/MR brain imaging—comparison to head atlas and 68Ge-transmission-based attenuation correction
... Attenuation correction (AC) is still a major challenge for PET/MR [1–3], and accurate AC is required for quantitative PET imaging ...photon attenuation values are directly measured at 511 keV, this ...
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Impact 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 ...
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A deep learning approach for 18F-FDG PET attenuation correction
... without attenuation correction and without time-of-flight, using the following parameters: 256 × 256 matrix, 700 × 700 mm 2 field of view, OSEM reconstruction algorithm, 24 iterations, 3 subsets, Shar- pIR, ...
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Breath-hold CT attenuation correction for quantitative cardiac SPECT
... of attenuation correction has been implemented with commercial PET cameras and now has become standard as a combined PET/CT ...to attenuation correction in the thoracic re- ...
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MLAA-based attenuation correction of flexible hardware components in hybrid PET/MR imaging
... mandates attenuation correction (AC), which compensates for the effect of photon ...PET attenuation coeffi- cients ...pre-defined attenuation coefficients ...the attenuation ...
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Comparison of effective dose and lifetime risk of cancer Incidence of CT attenuation correction acquisitions and radiopharmaceutical administration for myocardial perfusion imaging
... SPECT/CT has become common place in clinical imaging and a major role for CT is for the attenuation correction (AC) of SPECT data in myocardial perfusion imaging (MPI) [1, 2]. The benefits of CTAC in MPI ...
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Intravenous contrast-enhanced CT can be used for CT-based attenuation correction in clinical 111In-octreotide SPECT/CT
... the attenuation by increasing the photoelectric absorption of photons in the energy interval of interest in CT and in SPECT, and this effect is evident in the uncorrected SPECT data (Figure ...the ...
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Multi centre analysis of incidental findings on low resolution CT attenuation correction images
... CT attenuation correction (CTAC) can compensate for these errors in SPECT MPI, resulting in image quality improvement and more accurate ...the attenuation correction (AC) process, the CT ...
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Quantitative analysis of X-band weather radar attenuation correction accuracy
... of attenuation correction ...specific attenuation k), and total path integrated attenuation (PIA) estimates at ...Two attenuation correction algo- rithms, based on a forward and ...
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Polarimetric X-band weather radar measurements in the tropics: radome and rain attenuation correction
... by attenuation of the radome and the rain medium ...rain attenuation correction was implemented and data from one month was ...rain attenuation correction scheme (ZPHI) was ...of ...
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An artefact of PET attenuation correction caused by iron overload of the liver in clinical PET-MRI
... Background: Attenuation correction is one of the most important steps in producing quantitative PET image ...this correction is far from trivial, as MRI data are not correlated to PET ...
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A review of the issues surrounding incidental findings on CT attenuation correction (CTAC ) images during SPECT myocardial perfusion imaging
... breath-hold during the acquisition and the information gained is limited to a range through the cardiac area of the chest. The acquisition is performed purely for attenuation correction of SPECT image data ...
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An Investigation of the Required MR Bone Attenuation Correction for Quantitative Whole Body PET/MR Imaging Using Clinical NaF PET/CT Studies
... Tissue-classification-based attenuation correction strategies have been pre- viously proposed to correct for bone attenuation in PET/MR imaging and si- mulated using computed ...in attenuation ...
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MRI-Based Attenuation Correction in Emission Computed Tomography
... CT-based attenuation correction, is that motion creates a fundamental mismatch between emission and transmission ...69]. Correction of motion artifact is an arena in which PET/MRI is likely to excel ...
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Evaluation 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 [r] ...
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NEMA image quality phantom measurements and attenuation correction in integrated PET/MR hybrid imaging
... In diagnostic medical imaging the performance of imaging modalities needs to be tested and evaluated on a regular basis in order to ensure correct functionality and optimal image quality. Systems are analyzed by a ...
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Impact of non-uniform attenuation correction in a dynamic [18F]-FDOPA brain PET/MRI study
... Background: PET (positron emission tomography) biokinetic modelling relies on accurate quantitative data. One of the main corrections required in PET imaging to obtain high quantitative accuracy is tissue ...
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Assessment of the impact of applying attenuation correction on the accuracy of activity recovery in Tc99m-ECD brain SPECT of healthy subject using Statistical Parametric Mapping (SPM)
... Although some researcher has surveyed qualitatively the effects of attenuation and the necessity of apply attenuation correction on activation brain SPECT study, in [r] ...
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