The image quality (IQ) of imaging systems must be sufficiently high for image-guided radiation therapy (IGRT). Hence, users should implement a quality assurance program to maintain IQ. In our routine IQ tests of the kV cone-beam CT system (Elekta XVI), image noise was quantified by noise standard deviation (NSD), which was the standard deviation of CT numbers measured in a small area in an imag...

The primary focus of this research is to introduce a method of measuring an individual’s IQ by analyzing the vocabulary in said individual’s writing. In this paper, we show that the ratio of SAT words in a dataset of writing samples is roughly normally distributed, though with an obvious left skew. We go on to show a method that can be used to calculate an individual’s IQ with this ratio and pr...

OBJECTIVE Previous work suggested that first-trimester exposure to tricyclic antidepressants or fluoxetine does not affect adversely child IQ and language development. However, many women need antidepressants throughout pregnancy to avoid morbidity and suicide attempts. Little is known about the fetal safety of tricyclic antidepressants and fluoxetine when taken throughout pregnancy. The goal o...

BACKGROUND The occurrence of a significant relationship between psychopathic traits and intelligence is still open to debate. Most of the relevant information has been obtained from crystallized IQ tests or on psychopathic male offenders. In this study we hypothesized a negative correlation between psychopathic traits and fluid intelligence on a sample of criminal female in-patients. METHOD W...

OBJECTIVE To investigate the relation between breastfeeding, use of docosahexaenoic acid (DHA)-fortified formula and neuropsychological function in children. DESIGN Prospective cohort study. SETTING Southampton, UK. SUBJECTS 241 children aged 4 years followed up from birth. MAIN OUTCOME MEASURES IQ measured by the Wechsler Pre-School and Primary Scale of Intelligence (3rd edn), visual a...

BACKGROUND Studies of chronic schizophrenia suggest that there are subgroups with different profiles of cognitive impairment. AIMS To determine whether such heterogeneity is present at illness onset and any relationship to clinical variables. METHOD Ninety-three community patients with first-episode schizophrenia and 50 healthy volunteers were assessed for premorbid (Revised National Adult ...

OBJECTIVE A substantial body of literature has established the positive effect of breastfeeding on child developmental outcomes. There is increasing consensus that breastfed children have higher IQs after accounting for key variables, including maternal education, IQ, and socioeconomic status. Cross-sectional investigations of the effects of breastfeeding on structural brain development suggest...