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排序方式: 共有666条查询结果,搜索用时 15 毫秒
661.
Knutsson L Börjesson S Larsson EM Risberg J Gustafson L Passant U Ståhlberg F Wirestam R 《Journal of magnetic resonance imaging : JMRI》2007,26(4):913-920
PURPOSE: To compare absolute cerebral blood flow (CBF) estimates obtained by dynamic susceptibility contrast MRI (DSC-MRI) and Xe-133 SPECT. MATERIALS AND METHODS: CBF was measured in 20 healthy volunteers using DSC-MRI at 3T and Xe-133 SPECT. DSC-MRI was accomplished by gradient-echo EPI and CBF was calculated using a time-shift-insensitive deconvolution algorithm and regional arterial input functions (AIFs). To improve the reproducibility of AIF registration the time integral was rescaled by use of a venous output function. In the Xe-133 SPECT experiment, Xe-133 gas was inhaled over 8 minutes and CBF was calculated using a biexponential analysis. RESULTS: The average whole-brain CBF estimates obtained by DSC-MRI and Xe-133 SPECT were 85 +/- 23 mL/(min 100 g) and 40 +/- 8 mL/(min 100 g), respectively (mean +/- SD, n = 20). The linear CBF relationship between the two modalities showed a correlation coefficient of r = 0.76 and was described by the equation CBF(MRI) = 2.4 . CBF(Xe)-7.9 (CBF in units of mL/(min 100 g)). CONCLUSION: A reasonable positive linear correlation between MRI-based and SPECT-based CBF estimates was observed after AIF time-integral correction. The use of DSC-MRI typically results in overestimated absolute perfusion estimates and the present study indicates that this trend is further enhanced by the use of high magnetic field strength (3T). 相似文献
662.
663.
Dr. Jarl Hagelstam 《Journal of neurology》1904,26(3):268-284
Ohne Zusammenfassung 相似文献
664.
Sara Agnafors Anna Norman Kjellström Marcus Praetorius Björk Marie Rusner Jarl Torgerson 《Acta psychiatrica Scandinavica》2023,148(4):327-337
Objective
Mental illness is increasing among young people and likewise the request for health care services. At the same time, somatic comorbidity is common in children and adolescents with psychiatric disorders. There is a lack of studies on health care use in children and adolescents, and the hypothesis was that children and adolescents with psychiatric disorders use more primary-, and specialized somatic health care compared to children without psychiatric disorders.Methods
In this retrospective population-based register study, all individuals aged 3–17 years living in Västra Götaland region in Sweden in 2017 were included (n = 298,877). Linear and Poisson regression were used to compare health care use during 2016–2018 between children with and without psychiatric diagnoses, controlling for age and gender. The results were reported as unstandardised beta coefficient (ß) and adjusted prevalence ratio (aPR) respectively.Results
Having a psychiatric diagnosis was associated with more primary care visits (ß 2.35, 95% CI 2.30–2.40). This applied to most diagnoses investigated. Girls had more primary care visits than boys. Likewise, individuals with psychiatric diagnoses had more specialized somatic outpatient care (ß 1.70, 95% CI 1.67–1.73), both planned and unplanned (ß 1.23, 95% CI 1.21–1.25; ß 0.18, 95% CI 0.17–0.19). Somatic inpatient care was more common in those having a psychiatric diagnosis (aPR 1.65, 95% CI 1.58–1.72), with the diagnoses of psychosis and substance use exerting the greatest risk.Conclusions
Psychiatric diagnoses were associated with increased primary-, somatic outpatient- as well as somatic inpatient care. Increased awareness of comorbidity and easy access to relevant health care could be beneficial for patients and caregivers. The results call for a review of current health care systems with distinct division between medical disciplines and levels of health care. 相似文献665.
Isabella Gigante Elva Dröfn Sigurjónsdóttir Gustav Jarl Ulla Hellstrand Tang 《Diabetes/metabolism research and reviews》2023,39(4):e3611
Aims
This study aimed to assess (1) the use of different offloading interventions in Sweden for the healing of diabetes-related plantar neuropathic forefoot ulcers, (2) factors influencing the offloading intervention choice, and (3) the awareness of current gold standard offloading devices.Methods
An online questionnaire was distributed via SurveyMonkey to 51 prosthetic and orthotic clinics in Sweden.Results
Thirty-five (69%) practitioners responded to the questionnaire. Eighty-six percent of the practitioners provided modified off-the-shelf footwear combined with insoles to treat diabetes-related plantar neuropathic forefoot ulcers. A total contact cast (TCC) was provided by 20% of the practitioners, and a nonremovable knee-high walker was provided by 0%. Multiple practitioner-, patient-, intervention-, and wound-related factors were considered when practitioners provided offloading interventions to patients with this type of ulcer. The majority of the practitioners did not or were unsure whether they considered TCC or a nonremovable knee-high walker to be the gold standard treatment.Conclusions
Practitioners mainly provided the offloading intervention that the International Working Group on the Diabetic Foot strongly recommends not be provided, namely, modified off-the-shelf footwear with insoles. In contrast, TCC and nonremovable knee-high walkers, as the gold standards, were vastly underutilised. Therefore, the pattern of providing offloading interventions was almost exactly opposite to the recommendations of evidence-based guidelines. Different factors were considered when providing offloading interventions to patients with diabetes-related plantar neuropathic forefoot ulcers. The practitioners' lack of awareness regarding gold standard devices may have contributed to the underutilisation of TCC and nonremovable knee-high walkers. 相似文献666.
Nina Nouhravesh Jarl E. Strange Anders Holt Jacob Tønnesen Camilla Fuchs Andersen Sebastian K. Nielsen Lars Køber Robert J. Mentz Dorte Nielsen Emil L. Fosbøl Morten Lamberts Morten Schou 《European journal of heart failure》2023,25(10):1859-1867