Intercomparison of four reconstruction techniques for positron volume imaging with rotating planar detectors

Middle cerebral artery (MCA) aneurysms account for approximately 20% of aneurysmal subarachnoid hemorrhage (SAH). An understanding of MCA anatomy and variations is the key to successful treatment of MCA aneurysms, which may occur on the M1 segment, at the division of the main trunk or on distal branches. Patients may present with SAH, mass effect, epilepsy, or ischemia. MCA aneurysms associated with large temporal hematomas may be approached through the superior temporal gyrus. Other aneurysms are best approached with a medial or lateral transSylvian approach.     

An objective measurement technique for posterior scapular displacement

Contemporary shoulder rehabilitation programs emphasize scapular control in the treatment of shoulder pathology. In addition, scapular winging and scapular tipping are often cited as key components to both the evaluative and rehabilitative phase of treatment. However, the lack of objective measurement procedures makes clinical evaluation of these phenomena difficult. The purpose of this project was to develop a reliable technique to quantify posterior scapular displacement (direction of scapular movement for winging and/or tipping). Forty healthy subjects (21 males, 19 females) who reported no current shoulder pain participated in this study. A measurement instrument was designed to quantify, to the nearest whole degree of motion, the posterior displacement of the inferior angle of the scapula from the posterior thorax. Subjects' scapulae were each measured two times without holding weight (unweighted position) and two times while the subjects held 10% of their body weight (weighted position). During all trials, two testers were blinded from the measurement readings. Intraclass correlation coefficients (ICC) were calculated based on a repeated measure analysis of variance to determine intertester and intratester reliability. The standard error of measurement (SEM) was used to determine the measurement error. Intratester within-day reliability ICCs ranged from 0.97 to 0.98, and SEM ranged from 0.6 to 1.1 degrees. Intertester within-day reliability ICCs ranged from 0.92 to 0.97, and SEM ranged between 1.1 and 1.7 degrees. None of the calculated p values for intratester and intertester reliability were statistically significant (p < 0.05). We conclude that this measurement technique is a reliable method to quantify posterior scapular displacement. Further research utilizing this measurement technique is recommended.     

A new technique for continuous sphincter pressure measurement

A cannula and conveniently arranged ancillary apparatus designed to assist endotracheal intubation of patients with upper respiratory tract obstruction prior to tracheostomy are described.     

An analysis of correlations corrected for attenuation and range restriction.

An empirical attempt at demonstrating the bias in correlation coefficients that are corrected for both attenuation and range restriction was recently presented by R. Lee et al (see record 1983-02451-001). Using asymptotic methods, the present article analytically derives properties of the double-corrected correlation. It is shown that the double-corrected correlation is negatively biased. This negative bias decreases with increasing sample size and/or selection ratio. An expression for the standard error of the corrected correlation, useful for confidence interval estimation, is presented. Although the standard error of the corrected correlation is larger than that of the uncorrected correlation, the increase is proportionately smaller than the respective increase in the point estimate. Findings represent progress toward the request for full information about corrected correlations set forth in the Standards for Educational and Psychological Tests. (12 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A technique for measurement of methylmalonic acid in cattle urine

Methylmalonic acid was measured in cattle urine by decarboxylating it to propionate with sulfuric acid and heat and quantifying the propionate so formed by gas-liquid chromatography. Crystalline methylmalonic acid added to cow urine was recovered quantitatively.     

A proposed technique for intraoperative measurement of cervical spine stiffness

Research reported here addresses the issue of the reliability of retrospective reports of children's perceptions of maternal acceptance-rejection as measured by the Parental Acceptance-Rejection Questionnaire. A sample of 49 middle-class Caucasian 7- to 11-yr.-old children were asked to respond to the questionnaire reflecting on their mothers' current accepting-rejecting behaviors. Seven years later the same children--now adolescents--responded to the same questionnaire with the instruction to reflect back on their mothers' behavior when the youth were about 7 to 11 years of age. None of these youth recalled having been tested seven years earlier. A simple zero-order correlation between scores in childhood and adolescence was 62, indicating that adolescents' retrospective recollections were in moderate agreement with their reports during childhood. Thus, it seems clear that, at least with respect to perceptions of maternal acceptance-rejection as measured by the Parental Acceptance-Rejection Questionnaire, researchers can have reasonable confidence that adolescents' current recollections about their experiences of maternal acceptance-rejection are likely to be in moderate agreement with what they would have reported had they been tested during childhood.     

用于连铸漏钢坯壳的三维厚度检测技术

利用激光扫描仪精确检测漏钢发生后坯壳的厚度。坯壳厚度的变化与结晶器热监测数据有关。详细的三维厚度扫描证实结晶器里可能发生坯壳厚度局部变化。结合结晶器热监测数据,厚度变化的根本原因被确认。以DSP高速薄板连铸机的两个漏钢实例为例,讨论了漏钢坯壳。第一次漏钢与宽边的大型夹杂物有关。第二次漏钢发生在窄边,与局部坯壳变薄和错误的锥度设定有关。这两种情况中,漏钢都与坯壳厚度的局部减少有关。结晶器相应位置的坯壳温度降低,说明钢水和结晶器铜板之间产生气隙或绝缘层。用CON1D计算,证实了绝缘层的存在。应用CON1D有助于更好地理解导致这类漏钢产生的原因或行为。     

Evaluation of a biomagnetic technique for measurement of orocaecal transit time

OBJECTIVE: To evaluate a novel non-invasive and harmless biomagnetic technique to measure orocaecal transit time. DESIGN: A biomagnetic method was employed to measure orocaecal transit time in 26 healthy volunteers, 12 patients presumed to have rapid small intestine transit and six volunteers with slow intestinal transit induced by loperamide. Results were compared to those obtained with a standard H2 breath test performed simultaneously. METHODS: Subjects ingested a test meal consisting of a chocolate-flavoured custard (120 g, 120 kcal) containing 18 g of lactulose and 3 g of ferrite powder as a magnetic tracer. External measurements of the magnetic signal on the caecal area and determination of H2 concentrations on samples of end-expiratory air were performed at 5-10-min intervals for 4 h after test meal ingestion. RESULTS: The biomagnetic method yielded reliable values for orocaecal transit time in all healthy volunteers and 11 out of 12 patients with diarrhoea, whereas the H2 test was uninterpretable in two volunteers and five patients, because of either high fasting H2 levels or absolute lack of H2 excretion. Transit time values determined by the biomagnetic method (mean +/- SD = 93 +/- 32 min) were generally higher than those assessed by H2 breath analysis (77 +/- 22 min). Thus, although results obtained by the two methods were significantly correlated (R = 0.56, P < 0.01), calculated agreement between them was poor. Nevertheless, the two methods were equally effective in detecting both abnormally fast transit associated with diarrhoea and slow transit induced by loperamide. CONCLUSION: The simple and harmless biomagnetic technique for measuring orocaecal transit time is as effective as the H2 breath test in detecting abnormal transit rates, and may provide reliable measurements in circumstances where H2 breath profiles are uninterpretable.     

激光板形测量技术现状及发展

简单描述激光热轧带钢板形测量技术的现状 ,介绍几种采用激光测量技术的板形测量原理 ,分析各种技术方案的特点 ,结合作者开发多束激光板形仪工作 ,指出热轧带钢板形测量技术今后的发展方向     

An economical technique for pretesting communications compaigns.

Found that measures of 70 male undergraduate viewers' interest in filmed public service announcements prepared for TV broadcasts have a rank correlation coefficient of .78 with similar measures of interest in 2-sentence summaries of the messages contained in those announcements. This demonstrates that pretesting for communications campaigns can be accomplished without going to the expense of preparing messages in their final form or using the ultimate medium. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An improved isolation technique for bovine Neospora species

The authors report on a case of a solitary liver abscess due to Listeria monocytogenes in a 53-year-old diabetic white male and review all published cases of solitary listerial abscesses of the liver. L. monocytogenes is a rare cause of solitary liver abscess which occurs in elderly patients with diabetes mellitus. The clinical signs are variable and often mimic malignancy, with epigastric pain, night sweats and weight loss. Prevalent features are poor control of glycemia, temperature up to 38.5 degrees C and elevated alkaline phosphatase. Optimal treatment includes percutaneous drainage of the hepatic abscess and antibiotic therapy with an aminopenicillin or trimethoprim/sulfamethoxazole. Outcome of the reviewed patients was favourable with no mortality and no relapse of the disease.     

An easier technique for end to end pancreaticojejunostomy

The effect of a wild measles virus circulating in a childhood collective body on the immune status of 80 children has been studied over time. Only using enzyme immunoassay was it possible to fully record and assess the degree of booster effect of the virus on children in case of infection transmission. In 25% cases the increment of antibodies was at the expense of specific IgM antibodies appearing in the sera of children. By the end of the first month 60% of children developed a relative measles immunodepression. Analysis of the index of cell stimulation with phytohemagglutinin in the presence of suppressors enabled us to single out a group of children (30%) with weakly expressed suppressive factor. The observed phenomenon with a high degree of reliability may be used as an index of immune response development.