A contactless approach for respiratory gating in PET using continuous‐wave radar

Ersepke, Thomas; Büther, Florian; Heß, Mirco; Schäfers, Klaus P.

doi:10.1118/1.4927064

Cited by 9 publications

(2 citation statements)

References 22 publications

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“…Here, the measured PET data are sorted according to a respiratory signal into image subsets (respiratory phases) containing virtually no respiratory motion. Several hardware-based systems to record respiratory signals have been described in the literature (3)(4)(5)(6). Clinically, two systems are established: the real-time position management system (Varian Medical Systems, Palo Alto, Calif), which relies on an infrared camera monitoring the anteroposterior motion of a marker placed on the patient's abdomen (7), and the respiratory gating system AZ-733 V (Anzai Medical, Statistical analysis was performed by using all lesions found, and, separately, by using one fixed reference lesion per scan.…”

Section: Advance In Knowledgementioning

confidence: 99%

Impact of Data-driven Respiratory Gating in Clinical PET

Büther¹,

Vehren²,

Schäfers³

et al. 2016

Radiology

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Purpose To study the feasibility and impact of respiratory gating in positron emission tomographic (PET) imaging in a clinical trial comparing conventional hardware-based gating with a data-driven approach and to describe the distribution of determined parameters. Materials and Methods This prospective study was approved by the ethics committee of the University Hospital of Münster (AZ 2014-217-f-N). Seventy-four patients suspected of having abdominal or thoracic fluorine 18 fluorodeoxyglucose (FDG)-positive lesions underwent clinical whole-body FDG PET/computed tomographic (CT) examinations. Respiratory gating was performed by using a pressure-sensitive belt system (belt gating [BG]) and an automatic data-driven approach (data-driven gating [DDG]). PET images were analyzed for lesion uptake, metabolic volumes, respiratory shifts of lesions, and diagnostic image quality. Results Forty-eight patients had at least one lesion in the field of view, resulting in a total of 164 lesions analyzed (range of number of lesions per patient, one to 13). Both gating methods revealed respiratory shifts of lesions (4.4 mm ± 3.1 for BG vs 4.8 mm ± 3.6 for DDG, P = .76). Increase in uptake of the lesions compared with nongated values did not differ significantly between both methods (maximum standardized uptake value [SUVmax], +7% ± 13 for BG vs +8% ± 16 for DDG, P = .76). Similarly, gating significantly decreased metabolic lesion volumes with both methods (-6% ± 26 for BG vs -7% ± 21 for DDG, P = .44) compared with nongated reconstructions. Blinded reading revealed significant improvements in diagnostic image quality when using gating, without significant differences between the methods (DDG was judged to be inferior to BG in 22 cases, equal in 12 cases, and superior in 15 cases; P = .32). Conclusion Respiratory gating increases diagnostic image quality and uptake values and decreases metabolic volumes compared with nongated acquisitions. Data-driven approaches are clinically applicable alternatives to belt-based methods and might help establishing routine respiratory gating in clinical PET/CT. (©) RSNA, 2016 Online supplemental material is available for this article.

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Section: Advance In Knowledgementioning

confidence: 99%

Impact of Data-driven Respiratory Gating in Clinical PET

Büther¹,

Vehren²,

Schäfers³

et al. 2016

Radiology

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“…These properties enable the use of continuous wave radar to track respiratory related movements. Although it was unable to detect displacements smaller than 25μm, the device was able to achieve high Pearson correlation coefficients when compared to a respiratory belt and a depth camera with values between 0.69 and 0.99 (36).…”

Section: Respiratory Motionmentioning

confidence: 97%

Motion-correction strategies for enhancing whole-body PET imaging

Wang,

Bermudez,

Chen

et al. 2024

Front. Nucl. Med.

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Positron Emission Tomography (PET) is a powerful medical imaging modality widely used for detection and monitoring of disease. However, PET imaging can be adversely affected by patient motion, leading to degraded image quality and diagnostic capability. Hence, motion gating schemes have been developed to monitor various motion sources including head motion, respiratory motion, and cardiac motion. The approaches for these techniques have commonly come in the form of hardware-driven gating and data-driven gating, where the distinguishing aspect is the use of external hardware to make motion measurements vs. deriving these measures from the data itself. The implementation of these techniques help corrects for motion artifacts and improve tracer uptake measurements. With the great impact that these methods have on the diagnostic and quantitative quality of PET images, much research has been performed in this area and this paper outlines the various approaches that have been developed as applied to whole-body PET imaging.

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