Publications by authors named "J Helen Leonard"

This article presents a spatial environmental inversion scheme using broadband impulse signals with deep learning (DL) to model a single spatially-varying sediment layer over a fixed basement. The method is applied to data from the Seabed Characterization Experiment 2022 (SBCEX22) in the New England Mud-Patch (NEMP). Signal Underwater Sound (SUS) explosive charges generated impulsive signals recorded by a distributed array of bottom-moored hydrophones.

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Background: There is a significant association between low vitamin D levels at diagnosis of indolent B-cell lymphomas and inferior overall survival (OS). To determine whether supplemental vitamin D improves event-free survival (EFS) in these patients, we conducted a comparative double-blind study of vitamin D vs. placebo.

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Recent years have seen intense interest in the development of point-of-care nucleic acid diagnostic technologies to address the scaling limitations of laboratory-based approaches. Chief among these are combinations of isothermal amplification approaches with CRISPR-based detection and readouts of target products. Here, we contribute to the growing body of rapid, programmable point-of-care pathogen tests by developing and optimizing a one-pot NASBA-Cas13a nucleic acid detection assay.

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Purpose: Lymphomas are a heterogeneous group of diseases that develop in individuals of all ages and have variable prognoses. Improved survival resulting from therapy advances has led to the emergence of diverse late effects. Although several (US)-based organizations have developed survivorship guidelines, the distinct features of lymphoma subtypes and diverse therapies used raise concerns regarding their applicability to lymphoma survivors.

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Article Synopsis
  • Progression of disease within 24 months of initial immunochemotherapy (POD24) in follicular lymphoma (FL) is linked to worse patient outcomes, and there is currently no standard treatment for these patients.
  • A study of 256 FL patients with POD24 revealed diverse treatment approaches, with bendamustine-rituximab patients mostly receiving R-CHOP therapy and R-CHOP patients opting for aggressive salvage therapy.
  • The overall response rate to treatments after POD24 was 66%, with a complete response rate of 40%, while factors like age over 70 and high-risk FLIPI scores worsened overall survival outcomes (73% at 5 years).
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