Prospective acquisition correction for head motion with image‐based tracking for real‐time fMRI

Thesen, Stefan; Heid, O.; Mueller, Edgar A.; Schad, Lothar R.

doi:10.1002/1522-2594(200009)44:3<457::aid-mrm17>3.3.co;2-i

Cited by 101 publications

(131 citation statements)

References 0 publications

Supporting

Mentioning

126

Contrasting

Unclassified

Order By: Relevance

“…Techniques using PROPELLER or spiral sequences correct patient motion with alternative data acquisition strategies [1,2]. Navigator echos are added to MR sequences to compensate retrospectively and prospectively patient's motion during the scan [3,4,5]. Another MR based motion correction method was introduced by Ooi et al [6], using the response of active markers in form of small coils attached to the forehead of the patient.…”

Section: Introductionmentioning

confidence: 99%

Self-encoded Marker for Optical Prospective Head Motion Correction in MRI

Forman

Aksoy

Hornegger

et al. 2010

Medical Image Computing and Computer-Assisted Intervention – MICCAI 2010

View full text Add to dashboard Cite

Abstract. The tracking and compensation of patient motion during a magnetic resonance imaging (MRI) acqusition is an unsolved problem. For brain MRI, a promising approach recently suggested is to track the patient using an in-bore camera and a checkerboard marker attached to the patient's forehead. However, the possible tracking range of the head pose is limited by the locally attached marker that must be entirely visible inside the camera's narrow field of view (FOV). To overcome this shortcoming, we developed a novel self-encoded marker where each feature on the pattern is augmented with a 2-D barcode. Hence, the marker can be tracked even if it is not completely visible in the camera image. Furthermore, it offers considerable advantages over the checkerboard marker in terms of processing speed, since it makes the correspondence search of feature points and marker-model coordinates, which are required for the pose estimation, redundant. The motion correction with the novel self-encoded marker recovered a rotation of 18 • around the principal axis of the cylindrical phantom in-between two scans. After rigid registration of the resulting volumes, we measured a maximal error of 0.39 mm and 0.15 • in translation and rotation, respectively. In in-vivo experiments, the motion compensated images in scans with large motion during data acquisition indicate a correlation of 0.982 compared to a corresponding motion-free reference.

show abstract

Section: Introductionmentioning

confidence: 99%

Self-encoded Marker for Optical Prospective Head Motion Correction in MRI

Forman

Aksoy

Hornegger

et al. 2010

Medical Image Computing and Computer-Assisted Intervention – MICCAI 2010

View full text Add to dashboard Cite

show abstract

“…Approaches to motion detection/correction take two basic forms -(1) the detection is provided by an external tracking device, or (2) the MRI signal itself is used to track motion. The latter can be implemented directly 86 or through the use of a short duration "navigator" sequence embedded within the structural or diffusion scan in order to detect and account for motion. Examples of the former include cameras with reflective markers, RF markers, magnetic markers and inertial navigation systems [87][88][89] .…”

Section: Subject Motionmentioning

confidence: 99%

Studying neuroanatomy using MRI

et al. 2017

View full text Add to dashboard Cite

The study of neuroanatomy using imaging enables key insights into how our brains function, are shaped by genes and environment, and change with development, aging, and disease. Developments in MRI acquisition, image processing, and data modelling have been key to these advances. However, MRI provides an indirect measurement of the biological signals we aim to investigate. Thus, artifacts and key questions of correct interpretation can confound the readouts provided by anatomical MRI. In this review we provide an overview of the methods for measuring macro-and mesoscopic structure and inferring microstructural properties; we also describe key artefacts and confounds that can lead to incorrect conclusions. Ultimately, we believe that, though methods need to improve and caution is required in its interpretation, structural MRI continues to have great promise in furthering our understanding of how the brain works.

show abstract

“…Resting scans consisted of 67 interleaved oblique, 2 mm thick axial slices, covering the entire brain (repetition time = 6.0 s, echo time = 30 ms, flip angle = 90°, FOV 128 x 128, resulting in 2 mm isotropic voxels). Prospective acquisition correction (PACE) was used to mitigate artifacts due to head motion (Thesen et al, 2000). T1-weighted whole brain structural images were also acquired (MPRAGE sequence; repetition time = 2530 s, echo time = 3.48 ms, flip angle = 90°, FOV 256 x 256, resulting in 1 mm isotropic voxels).…”

Section: Imaging Proceduresmentioning

confidence: 99%

Brain differences between persistent and remitted attention deficit hyperactivity disorder

Biederman¹,

Mattfeld²,

Whitfield-Gabrieli³

et al. 2016

European Neuropsychopharmacology

View full text Add to dashboard Cite

Prior resting-state studies examining the brain basis of attention-deficit/hyperactivity disorder have not distinguished between patients who persist versus those who remit from the diagnosis as adults. To characterize the neurobiological differences and similarities of persistence and remittance, we performed resting-state functional magnetic resonance imaging in individuals who had been longitudinally and uniformly characterized as having or not having attention-deficit/hyperactivity disorder in childhood and again in adulthood (16 years after baseline assessment). Intrinsic functional brain organization was measured in patients who had a persistent diagnosis in childhood and adulthood (n = 13), in patients who met diagnosis in childhood but not in adulthood (n = 22), and in control participants who never had attention-deficit/hyperactivity disorder (n = 17). A positive functional correlation between posterior cingulate and medial prefrontal cortices, major components of the default-mode network, was reduced only in patients whose diagnosis persisted into adulthood. A negative functional correlation between medial and dorsolateral prefrontal cortices was reduced in both persistent and remitted patients. The neurobiological dissociation between the persistence and remittance of attentiondeficit/hyperactivity disorder may provide a framework for the relation between the clinical diagnosis, which indicates the need for treatment, and additional deficits that are common, such as executive dysfunctions.

show abstract

Prospective acquisition correction for head motion with image‐based tracking for real‐time fMRI

Cited by 101 publications

References 0 publications

Self-encoded Marker for Optical Prospective Head Motion Correction in MRI

Self-encoded Marker for Optical Prospective Head Motion Correction in MRI

Studying neuroanatomy using MRI

Brain differences between persistent and remitted attention deficit hyperactivity disorder

Contact Info

Product

Resources

About