MR-Based Cardiac and Respiratory Motion-Compensation Techniques for PET-MR Imaging

Muñoz, Camila; Kolbitsch, Christoph; Reader, Andrew J.; Marsden, Paul; Schaeffter, Tobias; Prieto, Claudia

doi:10.1016/j.cpet.2015.09.004

Cited by 40 publications

(33 citation statements)

References 54 publications

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“…Recently, the use of data-driven methods has gained substantial interest for both stand-alone and multi-modality imaging systems [185][186][187][188]. Continuous motion tracking can be used for motion compensation of PET and MR images [189,190].…”

Section: Motion Compensationmentioning

confidence: 99%

“…Continuous motion tracking can be used for motion compensation of PET and MR images [189,190]. In thoracic PET imaging, several motion detection techniques have been proposed, through builtin readout of the respiratory position and special radial-self gating sequences, respectively [186,187,191]. Cardiac motion is most commonly estimated by using cine-MR imaging and tagged MR imaging [192].…”

Section: Motion Compensationmentioning

confidence: 99%

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Hybrid Imaging: Instrumentation and Data Processing

et al. 2018

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State-of-the-art patient management frequently requires the use of non-invasive imaging methods to assess the anatomy, function or molecular-biological conditions of patients or study subjects. Such imaging methods can be singular, providing either anatomical or molecular information, or they can be combined, thus, providing "anato-metabolic" information. Hybrid imaging denotes image acquisitions on systems that physically combine complementary imaging modalities for an improved diagnostic accuracy and confidence as well as for increased patient comfort. The physical combination of formerly independent imaging modalities was driven by leading innovators in the field of clinical research and benefited from technological advances that permitted the operation of PET and MR in close physical proximity, for example. This review covers milestones of the development of various hybrid imaging systems for use in clinical practice and small-animal research. Special attention is given to technological advances that helped the adoption of hybrid imaging, as well as to introducing methodological concepts that benefit from the availability of complementary anatomical and biological information, such as new types of image reconstruction and data correction schemes. The ultimate goal of hybrid imaging is to provide useful, complementary and quantitative information during patient work-up. Hybrid imaging also opens the door to multi-parametric assessment of diseases, which will help us better understand the causes of various diseases that currently contribute to a large fraction of healthcare costs.

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Section: Motion Compensationmentioning

confidence: 99%

Section: Motion Compensationmentioning

confidence: 99%

Hybrid Imaging: Instrumentation and Data Processing

et al. 2018

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“…However, 3-dimensional (3D) MR tagging is a time-consuming technique, which has not yet found broad clinical use. Previously presented MR techniques providing motion information for PET/MR yield either respiratory or cardiac motion information and usually no diagnostic images (19,20).…”

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confidence: 99%

Cardiac and Respiratory Motion Correction for Simultaneous Cardiac PET/MR

et al. 2017

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Cardiac PET is a versatile imaging technique providing important diagnostic information about ischemic heart diseases. Respiratory and cardiac motion of the heart can strongly impair image quality and therefore diagnostic accuracy of cardiac PET scans. The aim of this study was to investigate a new cardiac PET/MR approach providing respiratory and cardiac motion-compensated MR and PET images in less than 5 min. Methods: Free-breathing 3-dimensional MR data were acquired and retrospectively binned into multiple respiratory and cardiac motion states. Three-dimensional cardiac and respiratory motion fields were obtained with a nonrigid registration algorithm and used in motion-compensated MR and PET reconstructions to improve image quality. The improvement in image quality and diagnostic accuracy of the technique was assessed in simultaneous 18 F-FDG PET/MR scans of a canine model of myocardial infarct and was demonstrated in a human subject. Results: MR motion fields were successfully used to compensate for in vivo cardiac motion, leading to improvements in full width at half maximum of the canine myocardium of 13% 6 5%, similar to cardiac gating but with a 90% 6 57% higher contrast-to-noise ratio between myocardium and blood. Motion correction led to an improvement in MR image quality in all subjects, with an increase in sharpness of the canine coronary arteries of 85% 6 72%. A functional assessment showed good agreement with standard MR cine scans with a difference in ejection fraction of 22% 6 3%. MR-based respiratory and cardiac motion information was used to improve the PET image quality of a human in vivo scan. Conclusion: The MR technique presented here provides both diagnostic and motion information that can be used to improve MR and PET image quality. Reliable respiratory and cardiac motion correction could make cardiac PET results more reproducible.

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“…Furthermore e.g. the present optical systems are relatively complex to apply and operate and additional expert staff may be required [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Interactive monitoring system for visual respiratory biofeedback

Odenbach

Boese

Friebe

2016

Current Directions in Biomedical Engineering

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Abstract:In almost any medical procedure respiratory motion is an issue and may result in image degradation. Most currently available devices and systems, which are intended to reduce respiratory influences do not come into operation however in clinics due to their high cost and complex operation. In our paper we evaluated an interactive breath hold control system that helps flat breathing to subsequently reduce respiratory motion during signal acquisitions or procedure treatments. With that the human subjects are enabled to regulate their own breath by following visual feedback via a specially designed display. That display shows biofeedback information about the respiratory excursion through air pressure deviations measured inside an air bellows belt. The system was assessed quantitatively in a laboratory setup and qualitatively by applications in real clinical procedures. The obtained results are very promising and can be further improved with additional developments to provide an easy to use and relatively inexpensive solution for respiratory motion related imaging problems.

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MR-Based Cardiac and Respiratory Motion-Compensation Techniques for PET-MR Imaging

Cited by 40 publications

References 54 publications

Hybrid Imaging: Instrumentation and Data Processing

Hybrid Imaging: Instrumentation and Data Processing

Cardiac and Respiratory Motion Correction for Simultaneous Cardiac PET/MR

Interactive monitoring system for visual respiratory biofeedback

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