Abstract：
:A computer-aided method was developed to automatically localize tumors in lung PET images of discrete bins within the breathing cycle, followed by an algorithm that registers all the information of a complete respiratory cycle into a single reference bin. Four registration/integration algorithms: Centroid Based, Intensity Based, Rigid Body, and Optical Flow registration were compared as well as two registration schemes: Direct scheme and Successive scheme. Validation was demonstrated by conducting experiments with the computerized 4D NCAT phantom and with a dynamic lung-chest phantom imaged using a GE PET/CT System. Iterations were conducted on different size simulated tumors. Static tumors without respiratory motion were used as gold standard; quantitative results were compared with respect to tumor activity concentration, cross-correlation coefficient, relative noise level, and computation time. After motion correction, the best compromise between short PET scan time and reduced image noise can be achieved, while quantification and clinical analysis become faster and more precise.
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Wang J,del Valle M,Goryawala M,Franquiz JM,McGoron AJdoi
10.1007/s11517-009-0549-6subject
Has Abstractpub_date
2010-01-01 00:00:00pages
49-58issue
1eissn
0140-0118issn
1741-0444journal_volume
48pub_type
杂志文章abstract：:This study analyzes the performance of knee extension and flexion of Taekwondo and Kickboxing athletes. The power values were extracted through electromyography obtained by an isokinetic dynamometer at 60 degrees per second. These values are resulted from the square of the electromyography signal. The analysis of kick...
journal_title：Medical & biological engineering & computing
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abstract：:A new method of quantifying dermal perfusion on a regional basis using a dynamic thermographic technique is investigated. The technique is based on the relationship between dermal perfusion and the rate of skin surface reheating following the application of a transient cold challenge predicted by a theoretical model. ...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
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abstract：:Partial coherence estimate between two signals removing the contribution of a periodic, deterministic one is proposed for measuring the coherence between two ongoing eletroencephalografic (EEG) activities collected at distinct cortical regions under sensory stimulation. The estimator expression was derived and shown t...
journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/s11517-007-0191-0
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章,评审
doi：10.1007/s11517-008-0381-4
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journal_title：Medical & biological engineering & computing
pub_type： 杂志文章
doi：10.1007/BF02447101
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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