Statistically segregated k-space sampling for accelerating multiple-acquisition MRI

A central limitation of multiple-acquisition magnetic resonance imaging (MRI) is the degradation in scan efficiency as the number of distinct datasets grows. Sparse recovery techniques can alleviate this limitation via randomly undersampled acquisitions. A frequent sampling strategy is to prescribe for each acquisition a different random pattern drawn from a common sampling density. However, naive random patterns often contain gaps or clusters across the acquisition dimension that in turn can degrade reconstruction quality or reduce scan efficiency. To address this problem, a statistically-segregated sampling method is proposed for multiple-acquisition MRI. This method generates multiple patterns sequentially, while adaptively modifying the sampling density to minimize k-space overlap across patterns. As a result, it improves incoherence across acquisitions while still maintaining similar sampling density across the radial dimension of k-space. Comprehensive simulations and in vivo results are presented for phase-cycled balanced steady-state free precession and multi-echo T2-weighted imaging. Segregated sampling achieves significantly improved quality in both Fourier and compressedsensing reconstructions of multiple-acquisition datasets

The role of fiberoptic bronchoscopy monitoring during percutaneous dilatational tracheostomy and its routine use into tracheotomy practice

Conclusion: Percutaneous dilatational tracheostomy was reliable when applied with fiberoptic bronchoscopy due to the significantly lower complication rates

USE OF BILATERAL GLOSSOPHARYNGEAL NERVE NEUROLYSIS IN A PATIENT WITH CANCER OF THE TONGUE BASE

Beyaz, Serbulent Gokhan/0000-0001-9263-7823WOS: 000369867600003PubMed: 26776740

Chest computed tomography severity score in patients admitted to intensive care unit with COVID-19 pneumonia br

BACKGROUND AND AIM: This study aimed to investigate the association of the chest computed tomography severity score (CT-SS) with mortality in patients who were admitted to the intensive care unit (ICU) with coronavirus disease 2019 (COVID-19) pneumonia. METHODS: In this single-center retrospective observational study, we reviewed the radiological and medical records of 45 patients with confirmed COVID-19, requiring ICU admission during a 4 month period. The chest CT-SS was used to evaluate the severity of lung involvement. RESULTS: Forty-five patients who admitted to the ICU with COVID-19 and had undergone chest CT scans on admission were enrolled. There wasn't a significant difference in total CT-SS neither between patients who died and those who survived [median (interquartile range) 22 (11-30) vs 16 (9-18), p=0.20] nor between patients who underwent invasive mechanical ventilation and those who did not [median (interquartile range) 22 (12-30) vs 15 (8-17), p=0.17]. The median of CT-SS was 17 (2-39) (n=23 vs n=22). The area under the curve for estimation of mortality according to CT-SS was 0.611 at a 95% CI of 0.434-0.788 (p=0.20). CONCLUSIONS: The total CT-SS, obtained from the chest CT on admission to the ICU, was not associated with an increased risk of mortality in patients admitted to ICU with COVID-19 pneumonia

Pediatric emergency department visit characteristics of the patients on the ketogenic diet

Background: The ketogenic diet (KD) has been frequently used for the patientswith drug-resistant epilepsy in recent years. The management of these patients in emergency departments (EDs) has some difficulties due to the special needs of KD.We aimed to determine the characteristics and themanagement of the patients on the KD in the pediatric ED setting.Methods: Patientswhowere on the KD and admitted to the ED were included in the study. Demographic, clinical, and laboratory data of all patients were retrospectively reviewed and recorded.Results: Therewere 105 emergency admissions of 27 patients. Themedian age of all patientswas 55.0 (IQR: 29.0– 91.0) months. The most common symptom was vomiting (43.8%). Four patients had upper gastrointestinal bleeding, and one patient had hyperammonemic acute hepatic failure while receiving KD. Of the patients, 41.9% had seizure-related ED admission. Infectionswere present in 41.9% of the ED visits. The frequency of status epilepticus was significantly lower in the patients who were on the KD for more than 6 months (p b 0.01). In 42.9% of all ED admissions, dextrose containing maintenance fluids was administered mistakenly; although ketosis rate was lower, no seizure was observed in this group.Conclusion: The patients on the KD can be admitted to EDswith intercurrent illnesses or adverse effects of the KD. For accurate management, emergency physicians must be aware of the common reasons for ED admission ofthese patients and the effects of the KD.</div