Motion correction for IRT imaging in neurosurgery: Analysis and comparison of frequency-/filter- and intensity-based approaches

Summary:Motion in PET/CT leads to artifacts in the reconstructed PET images due to the different acquisition times of positron emission tomography and computed tomography. The effect of motion on cardiac PET/CT images is evaluated in this study and a novel approach for motion correction based on optical flow methods is outlined. The Lukas-Kanade optical flow algorithm is used to calculate the motion vector field on both simulated phantom data as well as measured human PET data. The motion of the myocardium is corrected by non-linear registration techniques and results are compared to uncorrected images.

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Image-based Motion Correction for the Siemens hybrid-MR/BrainPET Scanner

10.1055/s-0039-1683702 ◽

2019 ◽

Cited By ~ 1

Author(s):

J Scheins ◽

CR Brambilla ◽

J Mauler ◽

E Rota kops ◽

L Tellmann ◽

...

Keyword(s):

Motion Correction

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Faculty Opinions recommendation of Electron counting and beam-induced motion correction enable near-atomic-resolution single-particle cryo-EM.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.718021192.793478920 ◽

2013 ◽

Author(s):

Jose Valpuesta

Keyword(s):

Single Particle ◽

Motion Correction ◽

Atomic Resolution ◽

Electron Counting ◽

Induced Motion ◽

Resolution Single

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Zero Frequency Filter Based Analysis of Voice Disorders

10.21437/interspeech.2017-589 ◽

2017 ◽

Cited By ~ 3

Author(s):

Nagaraj Adiga ◽

Vikram C.M. ◽

Keerthi Pullela ◽

S.R. Mahadeva Prasanna

Keyword(s):

Voice Disorders ◽

Frequency Filter ◽

Zero Frequency

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Synthesis for Butterworth Filter Using Compact VDTA Based on Sallen- Key Topology

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096512666191004123213 ◽

2020 ◽

Vol 13 (5) ◽

pp. 681-688

Author(s):

Yong-An Li

Keyword(s):

Network Theory ◽

Current Mode ◽

Second Order ◽

Frequency Filter ◽

Butterworth Filter ◽

Admittance Matrix ◽

Floating Capacitor ◽

A Current

Background: The original filter including grounded or virtual ground capacitors can be synthesized by using the NAM expansion. However, so far the filters including floating capacitor, such as Sallen-Key filter, have not been synthesized by means of the NAM expansion. This is a problem to be researched further. Methods: By using the adjoint network theory, the Sallen-Key filter including floating capacitor first is turned into a current-mode one, which includes a grounded capacitor and a virtual ground capacitor. Then the node admittance matrix, after derived, is extended by using NAM expansion. Results: At last, one VDTA Sallen-Key filter is received. It employs single compact VDTA and two grounded capacitors. Conclusion: A Butterworth VDTA second-order frequency filter based on Sallen-Key topology with fo = 100kHz, HLP = -HBP=1, is designed.

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