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...in this paper, we propose a novel method for joint cardiac and respiratory motion correction in pet/ct called cardiac shape tracking with adjustment for respiration (cstar). it uses a...shape tracking through the estimation of cardiac motion. cardiac motion correction is incorporated in a super-resolution framework, followed by adjustment for the residual respiratory motion blur using blind deconvolution. we...
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...from the observed projection data and performs a model-based inversion and motion correction of all the data to create a high-resolution focused cardiac image. we term the new approach...reconstruction functional which jointly estimates and corrects for respiratory motion, compensates for phase aligned cardiac motion, and super-resolves the image. the technique is presented and...
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R. C Brunken, F DiFilippo, D. R Neumann, B Bybel, B Herrington, T Bruckbauer, C Howe, K Lohmann, C Hayden, C Chatterjee, B Lathrop
...600 sec. transmission scan, thus imaging a composite of multiple respiratory and cardiac cycles for ac. pet/cts typically employ a more rapid acquisition acquired at...36 (± 11.2) by pet/ct. srs from dedicated pet were highly correlated to pet/ct (r=0.91, pet = 1.01*pet/ct). the average difference in srs...
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...overcome this, we have proposed a method of aligning a single ct with each frame of a gated pet study in a semi-automatic manner, incorporating a...suggest that diaphragm matching between pet and ct improves the quantitative accuracy of reconstructed pet images and that the proposed method of using a statistical shape model to describe...
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...manual registration.con- clusion: misregistration of pet and ct images is common in cardiac pet/ct studies and results in artifacts on the attenua- tion-corrected pet images, which appear to be corrected by re- peating the pet reconstruction after manual realignment of the ct image data. in contrast to manual...
Published in 2007.
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...expanding despite ar- tifactual defects and false-positive results due to misregistration of pet and ct attenuation correction data—the frequency, cause, and correction of which remain undetermined. methods: twohundredfifty-nineconsecutive patientsunderwent diagnos- ticrest-dipyridamole myocardial perfusion pet/ct using 82rb, a 16-slice pet/ct scanner, helical ct attenuation correction with breathing and also at end-expiratory breath...
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...68ge source is commonly used for photon ac in oncology studies and in cardiac viability studies and perfusion scanning. 68ge sources have only a low photon flux, which necessitates...as well as patient discomfort and economic losses because of lower patient throughput (4). introduction of hybrid pet/ct systems using the ct scan for ac is...
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...in order to model patient motion between pet and ct. the reconstructed pet images using shifted ct images for attenuation correction were compared with the pet images corrected with the hypothetically misalignment free original ct image. the criteria and figures of merit used included voi and linear regression analysis. the analysis...
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...purpose misalignment of low-dose-ct used for attenuation correction (ac) may cause artifacts in cardiac-pet–ct. the aim was to evaluate...segments.
conclusions misalignment between ct and pet in cardiac-pet–ct influences regional tracer distribution in multiple segments. repeated ct
imaging after dipyridamole does not improve...
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...planning process through the use of image fusion software. the combination of pet and ct in a single system (pet/ct) to form an inherently fused...paper reviews the current status of the integration of pet and pet/ct data into the radiotherapy treatment...