Recent advances in MRI technology: Implications for image quality and patient safety

Sobol, Wlad T.

doi:10.1016/j.sjopt.2012.07.005

Cited by 35 publications

(18 citation statements)

References 4 publications

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“…Led by technological advances, the field of MRI has evolved considerably over the last two decades . In recent years, compressive sensing has attracted considerable attention in the scientific community and demonstrated notable impact on several biomedical imaging applications, including MRI .…”

Section: Introductionmentioning

confidence: 99%

Variable density incoherent spatiotemporal acquisition (VISTA) for highly accelerated cardiac MRI

Ahmad

Xue

Giri

et al. 2014

Magnetic Resonance in Med

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Purpose For the application of compressive sensing to parallel MRI, Poisson disk sampling (PDS) has been shown to generate superior results compared with random sampling methods. However, due to its limited flexibility to incorporate additional constraints, PDS is not readily extendible to dynamic applications. Here, we propose and validate a pseudo-random sampling technique that allows incorporating constraints specific to dynamic imaging. Methods The proposed sampling scheme, called variable density incoherent spatiotemporal acquisition (VISTA), is based on constrained minimization of Riesz energy on a spatiotemporal grid. Data from both a digital phantom and real-time cine were used to compare VISTA with uniform interleaved sampling (UIS) and variable density random sampling (VRS). The image quality was assessed qualitatively and quantitatively. Results VISTA improved the trade-off between noise and sharpness. Also, VISTA produced diagnostic quality images at an acceleration rate of 15, whereas UIS and VRS images degraded below the diagnostic threshold at lower acceleration rates. Conclusions VISTA generates spatiotemporal sampling patterns with high levels of uniformity and incoherence, while maintaining a constant temporal resolution. Using a small pilot study, VISTA was shown to produce diagnostic quality images at acceleration rates up to 15.

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Section: Introductionmentioning

confidence: 99%

Variable density incoherent spatiotemporal acquisition (VISTA) for highly accelerated cardiac MRI

Ahmad

Xue

Giri

et al. 2014

Magnetic Resonance in Med

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“…High resolution magnetic resonance imaging (MRI) evaluation of the pituitary gland has become essential in the assessment of the growth hormone deficient (GHD) child [1][2][3]. This new MRI technique allows for greater detailed observations to be made [4][5][6]. As a result, the endocrinologist may discover new and more frequent radiographic findings, including pituitary cysts [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The prevalence and volumetry of pituitary cysts in children with growth hormone deficiency and idiopathic short stature

Krasnow

Pogostin

Haigney

et al. 2018

Journal of Pediatric Endocrinology and Metabolism

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BackgroundPituitary cysts have been speculated to cause endocrinopathies. We sought to describe the prevalence and volumetry of pituitary cysts in patients with growth hormone deficiency (GHD) and idiopathic short stature (ISS).MethodsSix hundred and eighteen children evaluated for growth failure at the Division of Pediatric Endocrinology at New York Medical College between the years 2002 and 2012, who underwent GH stimulation testing and had a brain magnetic resonance imaging (MRI) prior to initiating GH treatment were randomly selected to be a part of this study. High resolution MRI was used to evaluate the pituitary gland for size and the presence of a cyst. Cyst prevalence, cyst volume and percentage of the gland occupied by the cyst (POGO) were documented.ResultsFifty-six patients had a cyst, giving an overall prevalence of 9.1%. The prevalence of cysts in GHD patients compared to ISS patients was not significant (13.5% vs. 5.7%, p=0.46). Mean cyst volume was greater in GHD patients than ISS patients (62.0 mm3vs. 29.4 mm3, p=0.01). POGO for GHD patients was significantly greater (p=0.003) than for ISS patients (15.3%±12.8 vs. 7.1%±8.0). Observers were blinded to patient groups.ConclusionsGHD patients had a significantly greater volume and POGO compared to ISS patients. This raises the question of whether cysts are implicated in the pathology of growth failure.

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“…Spin echo imaging is still the mainstay of MRI, but now various new techniques hold promise for the future of head and neck imaging. [2] A new initiative in the field of MRI scan is blood oxygen level-dependent MRI. It is a non-invasive functional imaging technique that can identify hypoxic cancers which are likely to respond to accelerated radiotherapeutic treatment with radiosensitizers.…”

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confidence: 99%

Advances in maxillofacial radiology: Horizons to reach

Nagaraj¹

2015

JMRPS

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Recent advances in MRI technology: Implications for image quality and patient safety

Cited by 35 publications

References 4 publications

Variable density incoherent spatiotemporal acquisition (VISTA) for highly accelerated cardiac MRI

Variable density incoherent spatiotemporal acquisition (VISTA) for highly accelerated cardiac MRI

The prevalence and volumetry of pituitary cysts in children with growth hormone deficiency and idiopathic short stature

Advances in maxillofacial radiology: Horizons to reach

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