T1-Weighted MR Images: A Biopsy Sample Re-Examined To determine the pathologic process responsible for the signal intensity changes of hyperintense putamen on T1-weighted MR images (Fig 1A), we had previously performed stereotactic biopsy in a 72year-old man 3 months after the onset of stroke and hemiballism. The results revealed a fragment of gliotic brain tissue with abundant gemistocytes, wh...

OBJECTIVE To document the causes of high signal intensity of the meniscus which is not caused by definite meniscal tears on MR imaging, through correlation with histological examination. MATERIALS AND METHODS For the correlation between the MR image and histology, we obtained prospectively 31 meniscal specimens from 21 patients. Proton density-weighted turbo spin-echo MR images were used. Min...

PURPOSE To assess the relationship between quantitative measures of disc height and signal intensity with the Pfirrmann disc degeneration scoring system and to test the inter-rater reliability of the quantitative measures. METHODS Participants were 76 people who had recently recovered from their last episode of acute low back pain and underwent MRI scan on a single 3T machine. At all 380 lumb...

PURPOSE To study the nonlinearity of myocardial signal intensity and gadolinium contrast concentration during first-pass perfusion MRI, and to compare quantitative perfusion estimates using nonlinear myocardial signal intensity correction. MATERIALS AND METHODS The nonlinearity of signal intensity and contrast concentration was simulated by magnetization modeling and evaluated in phantom meas...

Leading a mentally stimulating life may build up a reserve of neural and mental resources that preserve cognitive abilities in late life. Recent autopsy evidence links neuronal density in the locus coeruleus (LC), the brain's main source of norepinephrine, to slower cognitive decline before death, inspiring the idea that the noradrenergic system is a key component of reserve (Robertson, I. H. 2...

STUDY DESIGN Case-control study. OBJECTIVE To use high-resolution magnetic resonance imaging (MRI) in assessing signal intensity areas in the alar ligaments. SUMMARY OF BACKGROUND DATA Conflicting evidence exists whether areas of high signal intensity in the alar ligament on MRI are more frequent in whiplash patients than in noninjured control subjects. METHODS A case-control designed stu...

the present study intended to compare two types of aerobic training on serum levels of resistin and insulin resistance in type-2 diabetic women. 24 middle-aged type-2 diabetic women (mean age 41.8±3.45 yr, weight 76.8±3.61 kg, bmi 31.1±1.02 kg/m2, body fat percentage 41.6±1.38 and whr 0.94±0.05) were purposively selected and then randomly assigned to three groups: highly-intensity interval trai...

To understand the central neural processes involved in blood pressure regulation we recorded muscle sympathetic nerve activity (MSNA) via a tungsten microelectrode in the common peroneal nerve while performing functional magnetic resonance imaging (fMRI) of the brainstem at 3T. Blood oxygen level dependent (BOLD) changes in signal intensity were measured over 4 s every 8 s (200) volumes; MSNA w...

BACKGROUND Myelodysplastic syndromes are clonal disorders of stem cells, characterized by heterogeneous clinical presentation. Hematopoiesis is ineffective, characterized by abnormal differentiation, maturation and survival of hematopoietic cells. MATERIAL AND METHODS The examinations were conducted in the Hematology Ward and the Internal Medicine Ward of the Specialist Hospital No. 1 in Byto...