Compressed SENSE accelerated 3D T1w black blood Turbo Spin Echo versus 2D T1w Turbo Spin Echo Sequence in Pituitary Magnetic Resonance Imaging

Publication date: Available online 14 September 2019Source: European Journal of RadiologyAuthor(s): Thomas Sartoretti, Elisabeth Sartoretti, Michael Wyss, Árpád Schwenk, Luuk van Smoorenburg, Barbara Eichenberger, Arash Najafi, Christoph Binkert, Anton S. Becker, Sabine Sartoretti-ScheferAbstractPurposeTo compare image quality between a 2D T1w turbo spin echo (TSE) sequence and a Compressed SENSE accelerated 3D T1w black blood TSE sequence (equipped with a black blood prepulse for blood signal suppression) in pre- and postcontrast imaging of the pituitary and to assess scan time reductions.Methods and MaterialsFor this retrospective study, 56 patients underwent pituitary MR imaging at 3 T. 28 patients were scanned with the 2D- and 28 patients with the accelerated 3D sequence. Two board certified neuroradiologists independently evaluated 13 qualitative image features (12 features on postcontrast- and 1 feature on precontrast images).SNR and CNR measurements were obtained. Interreader agreement was assessed with the intraclass correlation coefficient while differences in scores were assessed with exact Wilcoxon rank sum tests.ResultsThe interreader agreement ranged from fair (visibility of the ophthalmic nerve, ICC = 0.57) to excellent (presence and severity of pulsation artefacts, ICC = 0.97). The Compressed SENSE accelerated 3D sequence outperformed the 2D sequence in terms of "overall image quality" (median: 4 versus...
Source: European Journal of Radiology - Category: Radiology Source Type: research

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ConclusionsThis case series demonstrates that the use of a high frequency jet ventilator for cardiac MRI was feasible, safe, providing good quality cardiac imaging and avoiding anesthesia personnel to be inside the hazardous environment of MRI room. Future studies are needed to confirm its safety and efficiency in pediatric patients.ResumoJustificativa e objetivosA ressonância magnética (RM) cardíaca é uma técnica utilizada na avaliação de crianças com cardiopatias congênitas. A anestesia geral garante imobilidade, especialmente em pacientes não cooperador...
Source: Brazilian Journal of Anesthesiology - Category: Anesthesiology Source Type: research
Publication date: Available online 9 October 2019Source: NeuroImageAuthor(s): Sarah Whittle, Marjolein Barendse, Elena Pozzi, Nandita Vijayakumar, Julian SimmonsAbstractPituitary gland volume (PGV) increases during childhood and adolescence in a sex-specific manner, and previous research suggests that puberty may be associated with PGV development. However, existing research to date has focused on sex hormones associated with gonadarche. Given the role of the pituitary gland in hypothalamic-pituitary-adrenal (HPA) axis function, the present study investigated associations between PGV development and HPA hormones that play ...
Source: NeuroImage - Category: Neuroscience Source Type: research
Publication date: Available online 5 October 2019Source: NeuroImageAuthor(s): Monroe P. Turner, Håkan Fischer, Dinesh K. Sivakolundu, Nicholas A. Hubbard, Yuguang Zhao, Bart Rypma, Lars BäckmanAbstractFacial recognition ability declines in adult aging, but the neural basis for this decline remains unknown. Cortical areas involved in face recognition exhibit lower dopamine (DA) receptor availability and lower blood-oxygen-level-dependent (BOLD) signal during task performance with advancing adult age. We hypothesized that changes in the relationship between these two neural systems are related to age differences i...
Source: NeuroImage - Category: Neuroscience Source Type: research
Publication date: Available online 5 October 2019Source: NeuroImageAuthor(s): AmanPreet Badhwar, Yannik Collin-Verreault, Pierre Orban, Sebastian Urchs, Isabelle Chouinard, Jacob Vogel, Olivier Potvin, Simon Duchesne, Pierre BellecAbstractStudies using resting-state functional magnetic resonance imaging (rsfMRI) are increasingly collecting data at multiple sites in order to speed up recruitment or increase sample size. The main objective of this study was to assess the long-term consistency of rsfMRI connectivity maps derived at multiple sites and vendors using the Canadian Dementia Imaging Protocol (CDIP, www.cdip-pcid.ca...
Source: NeuroImage - Category: Neuroscience Source Type: research
Publication date: Available online 5 October 2019Source: NeuroImageAuthor(s): Jonathan D. Power, Charles J. Lynch, Marc J. Dubin, Benjamin M. Silver, Alex Martin, Rebecca M. JonesAbstractBreathing rate and depth influence the concentration of carbon dioxide in the blood, altering cerebral blood flow and thus functional magnetic resonance imaging (fMRI) signals. Such respiratory fluctuations can have substantial influence in studies of fMRI signal covariance in subjects at rest, the so-called “resting state functional connectivity” technique. If respiration is monitored during fMRI scanning, it is typically done...
Source: NeuroImage - Category: Neuroscience Source Type: research
Publication date: Available online 24 September 2019Source: NeuroImageAuthor(s): Luciano Simone, Luca Fornia, Luca Viganò, Fabio Sambataro, Marco Rossi, Antonella Leonetti, Guglielmo Puglisi, Henrietta Howells, Andrea Bellacicca, Lorenzo Bello, Gabriella CerriThe development of awake intraoperative brain-mapping procedures for resection of brain tumors is of growing interest in neuroscience, because it enables direct testing of brain tissue, previously only possible in non-human primates. In a recent study performed in this setting specific effects can be induced by direct electrical stimulation on different sectors...
Source: NeuroImage - Category: Neuroscience Source Type: research
ConclusionBimeniscal replacement by an allograft and/or substitute provides good short-term functional and anatomical outcomes. Nevertheless, this procedure is warranted only in highly selected patients.Level of evidenceIV, retrospective study.
Source: Orthopaedics and Traumatology: Surgery and Research - Category: Orthopaedics Source Type: research
We present the case of an 84-year-old man with chest tightness, dyspnoea, and ascites. He had a history of dyslipidaemia and ischaemic heart disease. Initial investigations showed severe diastolic dysfunction and elevated pulmonary artery systolic pressure on echocardiogram along with elevated serum natriuretic peptides. Further evaluation by a magnetic resonance imaging scan of the heart and endomyocardial biopsy confirmed the diagnosis of senile systemic amyloidosis. He made good progress after treatment with conventional heart failure drugs and is currently under consideration to start on specific medications to slow do...
Source: Journal of the Saudi Heart Association - Category: Cardiology Source Type: research
Recent technological and clinical advancements of both respiratory-correlated (RC) and time-resolved (TR) four-dimensional magnetic resonance imaging (4DMRI) techniques are reviewed in light of tumor/organ motion simulation, monitoring, and assessment in radiotherapy. For radiotherapy of thoracic and abdominal cancer, respiratory-induced tumor motion, and motion variation due to breathing irregularities are the major uncertainties in treatment. RC-4DMRI is developed to assess tumor motion for treatment planning, whereas TR-4DMRI is developed to assess both motion and motion variation for treatment planning, delivery and as...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
This study was approved by the Ethics Committee of our hospital. MR images were acquired on a 3.0-Tesla MR system (Discovery MR750, General Electric, Milwaukee, WI, USA). Thirty diabetic patients were divided into NAU (normal to mildly increased albuminuria, N = 15) and MAU (moderately increased albuminuria, N = 15) group based on the absence or presence of microalbuminuria. Fifteen Controls with sex- and age-matched were enrolled in the study. Prior to MRI scan, all participants were instructed to collect their fresh morning urine samples for quantitative measurement of urinary microalbumin and urinary creatinine. Then, t...
Source: The British Journal of Radiology - Category: Radiology Authors: Tags: Br J Radiol Source Type: research
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