Introduction: As part of our work on myocardial iron quantification we have developed an breath-hold fast spin echo (FSE) T2 technique with good reproducibility (1,2). This T2 technique, however, is based on region-ofinterest (ROI) analysis. Although ROI analysis can increase signal to noise ratio (SNR), it may introduce errors to T2 measurement by averaging every pixel within the region. By co...

background transfusion-induced iron overload leads to many complications in patients with β-thalassemia major. this study aimed to compare the level of iron stored in the liver and heart measured by mri t2 * with ferritin levels in these patients. materials and methods this study was done on 52 patients with β-thalassemia major aged 7 to 29 years. serum ferritin level was checked and heart and ...

Introduction: T2 relaxation time quantification has high potential for the diagnostic work up of cartilage, especially in early osteoarthritis. T2 calculation relies on fitting data acquired at different echo times (TE) from multi-echo sequences (MES) to an exponential equation, which is assumed to reflect transverse magnetization decay. The low T2 times in articular cartilage (between 10 and 5...

Partial sequences of the RNase P RNA gene (rnpB) were obtained from a number of hemoplasmas and other Mycoplasma species. Phylogenetic analysis of these sequences showed that all hemoplasmas were present within a single clade and were most closely related to Mycoplasma fastidiosum, similar to the results found with 16S rRNA gene phylogeny.

A mutant strain deficient in RNase T was isolated and used to study the role of this enzyme in Escherichia coli. Strains lacking as much as 70% of RNase T activity, alone or in combination with the absence of other RNases, display normal growth properties. However, in cca strains, which lack tRNA nucleotidyltransferase, RNase T-deficient derivatives accumulate lower levels of defective tRNA and...

conclusion in breast cancer after nac, the lesion t2 relaxation time was reduced in the responders, and this finding is potentially useful to assess the response to nac. results in 26 cases with nac, the mean lesion t2 relaxation time before nac was 81.34 ± 13.68 ms, compared with 64.50 ± 8.71 ms after nac. significant differences in the lesion t2 relaxation times existed between the pre- and p...

Cinchona officinalis, conocida como árbol de la quina, es una especie emblemática Perú, con alto valor medicinal, se popularizó por su uso antimalárico y encuentra en peligro extinción. El objetivo investigación fue estudiar el efecto del sustrato sobre propagación sexual C. officinalis. Se aplicó un diseño completamente al azar cinco tratamientos acuerdo tipo T1 (25 % tierra bosque + 75 arena)...