Basic Science and Pathogenesis.

Background: Alzheimer's disease (AD) and other dementia risk may be influenced by the immune function and associated with several white blood cell type counts. In cognitively normal Black, Hispanic, and non-Hispanic white older adults we related three white blood cell types previously associated with AD risk to tau positron emission tomography (PET) values in the medial temporal lobe (MTL), where tau accumulates early. We assessed whether amyloid positivity moderated this relationship.

Basic Science and Pathogenesis.

Background: Positron emission tomography (PET) tau tracer PI-2620 frequently shows off-target meningeal binding (Figure 1). Of standard regions of interest, only lateral parietal (LP) is contaminated by this. We compare the standardized uptake value ratio (SUVR) in the LP before and after eroding the LP mask to remove meningeal contamination.

PGMweb: an online tool for visualizing the X-ray beam path through plane grating monochromators.

We present here a newly developed software tool (called PGMweb) for computing and simulating the X-ray beam path through a plane grating monochromator (PGM), a key component in soft X-ray beamlines at modern synchrotron and free-electron laser facilities. A historical overview of the development of PGMs is presented, with special attention dedicated to the collimated PGM optical scheme found at several X-ray facilities worldwide. The analytical expressions that fully describe the geometry of a PGM are derived and have been implemented as functions in a Python library (pyplanemono).

Teamwork in Clinical Medicine.

Clinical teams are at the heart of healthcare value. Teamwork requires an appreciation of the unique geniuses of each team member as well as an understanding of team dynamics and larger organizational challenges. Effective teams leverage each member's unique talents within a culture of shared humility, service, and dedication.