cross‐correlation Dotaz Zobrazit nápovědu
- MeSH
- elektroencefalografie MeSH
- evokované potenciály MeSH
- lidé MeSH
- učení MeSH
- Check Tag
- lidé MeSH
Predoperační staging je při karcinomu v dolní pánvi s pomocí CT a transrektální ultrasonografie nezbytností. K hodnocení chorobných stavů orgánů této oblasti je předpokladem jejich normální anatomie v příčných vrstvách. Ta je doložena v práci ve 4 příčných zobrazeních. v klinickém oddíle jsou podány a diskutovány srovnatelné obrazy příčných vrstev z CT a transrektální ultrasonografie (TRS) u 20 zdravých mužů. Srovnává se přitom výpovědní schopnost v dokumentováni anatomických struktur CT a TRS. TRS dovoluje hodnocení perirektálních a intramurálních infiltrací. Může odhalit patologické změny prostaty, vas deferens a báze močového měchýře. Vyšetřovací oblast je však omezena na dolní pánev; kosti a svaly se jí nedají vyšetřit. CT umožňuje diagnostiku odchylek svalů a kostí a měla by být používána jako doplňující diagnostický prostředek ve screeningu a stagingu malignit dolní pánve.
Preoperative staging of the carcinoma of lower pelvis by means of CT or TRS is a mandatory procedure. Exact knowledge of normal sonographic and gross anatomy is essential in evaluating the diseases of organs of the lower pelvis. In the anatomical part of this study we show the normal anatomy of the lower pelvis in four representative cross-sections. In the clinical part TRS and CT of 20 male subjects from our cancer screening programme, who had no pathology of pelvic organs, were examined and four layers which were best comparable with anatomic sections were schosen. Capacity of CT and TRS of revealing anatomic structures of the lower pelvis are compared and discussed. TRS allows the evalution of intramural and perirectal infiltrations. Pathologic alterati¬ ons of prostate, vas deferens, and the bladder base can be detected by TRS. However, the examination area is confined to the lower pelvis, bones and muscles cannot be evaluated by this method. CT renders the diagnosis of pelvic bone and muscle pathologies possible and should be used as a complementary diagnostic method in screening and staging the malignancies of the lower pelvis.
- MeSH
- lidé MeSH
- nemoci rekta MeSH
- pánev anatomie a histologie patologie ultrasonografie MeSH
- počítačová rentgenová tomografie MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- přehledy MeSH
To monitor gradual changes in the replication foci distribution during early S phase, different segments of newly synthesized DNA were visualized by immunocytochemical mapping of two consecutively incorporated deoxythymidine analogs in pulse-chase-pulse experiments in HeLa cells. The resulting dual-labeled fluorescence images were evaluated using cross-correlation function (CCF) analysis. General changes of CCF shape due to image deterioration caused by blur, noise, and lateral sampling (pixel size) were also discussed. Using CCF analysis of model images simulating either random initiation of new replication foci, or the firing of new foci in close proximity to completed ones, we were able to ascribe the changes in the early S replication foci distribution to the latter mechanism. In contrast to the data published previously, we monitored the dynamics of all replication foci for up to 3 h. In addition, we showed that the replication foci dynamics is well described by random walk model, so that the average de-localization of individual foci is proportional to square root of the applied chase.
OBJECTIVES: Facial averageness and sexual dimorphism are extensively studied attractiveness markers, which are viewed as possible indicators of biological quality. Both are complex morphological traits, and both can be easily assessed from frontal and lateral projection of a human face. Interestingly, examination of mutual relations between the frontal and lateral dimensions of these markers has so far received little attention in published research. METHODS: In our cross-cultural study, we used geometric morphometric data from male and female faces from Brazil, Cameroon, Colombia, and the Czech Republic, and analyzed correlations between frontal and lateral measurements of averageness and degree of maleness/femaleness, that is, the individual variation in features that characterize sexual dimorphism. We also analyzed whether the association between frontal and lateral measurements differed in men and women. RESULTS: In general, our results showed a moderate correlation in sexually dimorphic features between lateral and frontal facial configuration in both sexes, while frontal and lateral facial averageness was moderately correlated only in women. This pattern was less consistent when individual populations were analyzed separately. CONCLUSIONS: We suggest that, in general, the weak association between lateral and frontal facial configurations may be the result of selection pressures in favor of individual identity signals. Moreover, especially in women, the frontal and lateral dimension of a given facial attractiveness marker may provide similar information about the qualities of the individual. The absence of a significant correlation in male facial averageness suggests that frontal and lateral averageness convey different information about an individual.
- MeSH
- dospělí MeSH
- kefalometrie * MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- obličej anatomie a histologie MeSH
- pohlavní dimorfismus * MeSH
- srovnání kultur * MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Brazílie MeSH
- Česká republika MeSH
- Kamerun MeSH
- Kolumbie MeSH
In this work, we propose a new approach for three-dimensional registration of MR fractional anisotropy images with T1-weighted anatomy images of human brain. From the clinical point of view, this accurate coregistration allows precise detection of nerve fibers that is essential in neuroscience. A template matching algorithm combined with normalized cross-correlation was used for this registration task. To show the suitability of the proposed method, it was compared with the normalized mutual information-based B-spline registration provided by the Elastix software library, considered a reference method. We also propose a general framework for the evaluation of robustness and reliability of both registration methods. Both registration methods were tested by four evaluation criteria on a dataset consisting of 74 healthy subjects. The template matching algorithm has shown more reliable results than the reference method in registration of the MR fractional anisotropy and T1 anatomy image data. Significant differences were observed in the regions splenium of corpus callosum and genu of corpus callosum, considered very important areas of brain connectivity. We demonstrate that, in this registration task, the currently used mutual information-based parametric registration can be replaced by more accurate local template matching utilizing the normalized cross-correlation similarity measure.
- MeSH
- algoritmy MeSH
- anizotropie MeSH
- interpretace obrazu počítačem metody MeSH
- lidé MeSH
- longitudinální studie MeSH
- magnetická rezonanční tomografie metody MeSH
- mapování mozku metody MeSH
- mozek anatomie a histologie MeSH
- počítačové zpracování obrazu metody MeSH
- referenční hodnoty MeSH
- reprodukovatelnost výsledků MeSH
- senioři MeSH
- software MeSH
- zobrazování trojrozměrné metody MeSH
- Check Tag
- lidé MeSH
- senioři MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Aim: To compare nurses' and patients' reports of missed nursing care in surgical units. Design: A cross-sectional correlational study. Methods: The sample involved 130 nurses in surgical departments, and 112 patients assigned to nurses during various shifts were included. The Slovak version of the Missed Nursing Care Survey, the MISSCARE-Patient Survey, and the Generic Short Patient Experiences Questionnaire were used to collect data. Data were analyzed using descriptive and nonparametric inductive statistics. Results: The overall mean scores of the MISSCARE versions were low, suggesting a tendency for nurses and patients to perceive missed nursing care as a rarely occurring phenomenon. Patients' perceptions of specialist health care were positive, and only 20.7% of patients experienced any adverse events during hospitalization in surgical units. The nonsignificant relationship between nurses' and patients' reports of missed nursing care suggests differing perspectives on the amount and pattern of missed nursing care. A significant difference in the perception of missed nursing care in surgical wards was found among nurses but not among patients. A negative association between missed nursing care from the perspective of nurses and patients and various dimensions of patient-centered care was revealed. Conclusion: The study indicated a significant difference between nurses' and patients' perceptions and experiences of missed nursing care, highlighting the importance of including both perspectives.
Vitamin D deficiency is a major health problem in the Saudi population. A negative association between blood pressure and vitamin D level has been suggested in several clinical and epidemiological studies and evidence for an effect of vitamin D in lowering blood pressure was reported. These findings indicate that 1,25(OH)2D3 deficiency may play a role in the pathogenesis of hypertension through its effect on the renin-angiotensin system. We are the first to investigate the correlation between blood pressure or renin concentration and vitamin D status in the Saudi population METHODS: we included 201 healthy Saudi premenopausal females (20-45 years old). Blood pressure was measured by a standardized method using an automated blood pressure monitor (BPTru). Fasting blood samples were collected from each participant after 20 minutes of rest in the seated position. Serum cholicalciferol, PTH and renin concentration were measured by sandwich chemiluminescence immunoassay method (DiaSorin, Italy). RESULTS: The analysis included 192 subjects who were normotensive (blood pressure <140/90 mmHg). A total of 34% of women had a severe deficiency (vitamin D ≤ 12.5 nmol/L); 41% had moderate deficiency (vitamin D levels between 12.5 - 25 nmol/L); 23% had mild deficiency (vitamin D level ≥ 25 - < 50 nmol/L); and 2% had insufficiency (vitamin D level ≥ 50 - ≤ 75 nmol/L). None had a sufficient level of ≥75 nmol/L. The systolic blood pressure ranged from 79-130.5 mmHg and the diastolic from 48.5-85.5 mmHg. Both systolic and diastolic blood pressures were significantly higher in women that were in the lower 2 quartiles of vitamin D. However, linear regression analysis adjusting for potential confounders showed that 25(OH)D level was not a predictor of either systolic or diastolic blood pressures. A negative correlation (although not significant) was found between vitamin D level and plasma renin concentration in this study group. CONCLUSION: Vitamin D deficiency was highly prevalent among the study group. Vitamin D was a not a predictor of either systolic or diastolic blood pressure. There was a negative correlation between vitamin D level and renin concentration although not statically significant. It is possible that any underlying relationship was obscured by the relatively young age group or due to the narrow blood pressure range of the studied population. A larger sample size including hypertensive subjects may be needed.
