Suboptimal patient positioning with panoramic and CBCT imaging: effects on dose.

Objective: This study examined the effects of changes in patient positioning on radiation exposure for panoramic and cone beam computed tomography (CBCT) radiographic examinations by measuring effective dose (E) and equivalent doses.

Study Design: Simulated radiographic examinations with optimal and suboptimal positioning-anterior shift by 1 centimeter (cm), posterior shift by 1 cm, chin lowered by 10 degrees (°), chin elevated by 10°, rotation by 10°, and lateral shift by 1 cm-were conducted using a tissue-equivalent phantom and optically-stimulated luminescent dosimeters. Exposures were made with the RAYSCAN Alpha Plus 160 X-ray unit using the following exposure parameters: panoramic, 80 kVp, 14 mA, and 13.

Expressions of uncertainty in online science communication hinder information diffusion.

Despite the importance of transparent communication of uncertainty surrounding scientific findings, there are concerns that communicating uncertainty might damage the public perception and dissemination of science. Yet, a lack of empirical research on the potential impact of uncertainty communication on the diffusion of scientific findings poses challenges in assessing such claims. We studied the effect of uncertainty in a field study and a controlled experiment.

Mesoscale properties of biomolecular condensates emerging from protein chain dynamics.

Biomolecular condensates form by phase separation of biological polymers. The cellular functions of the resulting membraneless organelles are closely linked to their physical properties over a wide range of length- and timescales: From the nanosecond dynamics of individual molecules and their interactions, to the microsecond translational diffusion of molecules in the condensates, to their viscoelastic properties at the mesoscopic scale. However, it has remained unclear how to quantitatively link these properties across scales.

Challenges for assessment of cohabiting stocks of argentine shortfin squid using parasites as biological tags.

The Argentine shortfin squid is one of the most important commercial species for the Argentine fisheries. The understanding of its stock structure is therefore necessary to ensure fishery sustainability and, given the relevance of squids in the regional food web, for biodiversity conservation. An overlap between parasitology and fisheries lies in the use of parasites as biological tags to identify the stock composition of exploited resources, however, the efficiency of this methodology has been questioned for stock assessment in cephalopods.

Calcified amorphous tumor of the posterior mitral annulus.

Unlabelled: A 73-year-old male with a history of hypertension, congenital kidney aplasia, status post-myocardial infarction, stroke, and chronic renal insufficiency was admitted to our institute due to coronary artery bypass grafting. Preoperative echocardiogram revealed a 15 × 7 mm mass arising near the posterior mitral annulus. Following the coronary artery bypass grafting, the left atrial cavity was explored using a 30° endoscope.