Publications by authors named "Mads Kristensen"

We demonstrate a memory for light based on optomechanically induced transparency. We achieve a long storage time by leveraging the ultralow dissipation of a soft-clamped mechanical membrane resonator, which oscillates at MHz frequencies. At room temperature, we demonstrate a lifetime T_{1}≈23  ms and a retrieval efficiency η≈40% for classical coherent pulses.

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Background: In 2018, the concept of clusters was introduced as a new model for data-driven quality improvement in general practice in Denmark. However, there is little research on the development and implementation of general practice clusters. The study explores how the cluster coordinators responsible for leading the clusters forward enacted and experienced their role during the early years of the clusters with attention to the challenges and enablers perceived in the process.

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Article Synopsis
  • The study explores an AI-based system for autonomously following up with patients suffering from neovascular age-related macular degeneration (AMD).
  • The research involved training a temporal deep learning model on a large dataset of scans to better detect disease activity, outperforming a previous non-temporal model.
  • Results indicated that the AI system made autonomous decisions in 73% of the cases, aligning closely with expert opinions and suggesting it could help relieve pressure on ophthalmology services dealing with more AMD patients in the future.
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Purpose: To meet the demands imposed by the continuing growth of the Age-related macular degeneration (AMD) patient population, automation of follow-ups by detecting retinal oedema using deep learning might be a viable approach. However, preparing and labelling data for training is time consuming. In this study, we investigate the feasibility of training a convolutional neural network (CNN) to accurately detect retinal oedema on optical coherence tomography (OCT) images of AMD patients with labels derived directly from clinical treatment decisions, without extensive preprocessing or relabelling.

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Acute critical illness is often preceded by deterioration of routinely measured clinical parameters, e.g., blood pressure and heart rate.

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Purpose: The objectives of this study was to present wideband tympanometry (WBT) data and absorbance with normal hearing and normal middle ear status.

Methods: Data were collected in 99 adult Caucasians with normal hearing and middle ear status. Energy absorbance was measured with an Interacoustics Titan using clicks for 1/24-octave frequency-intervals (0.

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Background: General practitioners (GPs) are responsible for managing chronic care in the growing population of patients with comorbid chronic conditions and cancer. Studies have shown, however, that cancer patients are less likely to receive appropriate chronic care compared to patients without cancer. Patients say that how GPs engage in the care of comorbidities influences their own priority of these conditions.

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Quantitative susceptibility mapping (QSM) is based on magnetic resonance imaging (MRI) phase measurements and has gained broad interest because it yields relevant information on biological tissue properties, predominantly myelin, iron and calcium in vivo. Thereby, QSM can also reveal pathological changes of these key components in widespread diseases such as Parkinson's disease, Multiple Sclerosis, or hepatic iron overload. While the ill-posed field-to-source-inversion problem underlying QSM is conventionally assessed by the means of regularization techniques, we trained a fully convolutional deep neural network - DeepQSM - to directly invert the magnetic dipole kernel convolution.

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Background: As in other countries, Danish health authorities have introduced disease management programmes (DMPs) to improve care quality. These contain clinical practice guidelines (CPGs) and guidelines for patient stratification based on doctors' assessments of disease severity and self-care. However, these programmes are challenged when patients have complex chronic conditions.

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Objectives: Due to a growing population with both cancer and chronic diseases, we explored patients' experiences of living with a cancer diagnosis and comorbidities, the possible effects on everyday living and management of comorbidities.

Methods: Semi-structured interviews were conducted during 2016 with 15 patients in Denmark, with finished cancer treatment and preexisting comorbidities. Analysis was performed by Systematic Text Condensation.

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Objective: This paper investigated patients' experiences of disease and self-care as well as perceptions of the general practitioner's role in supporting patients with impaired self-care ability.

Design: Qualitative interviews with 13 patients with type 2 diabetes, concurrent chronic diseases, and impaired self-care ability assessed by a general practitioner. We analyzed our data using systematic text condensation.

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Background: It is not known how general practitioners (GPs) perceive the concept of self-care and how they assess self-care ability in patients with multiple chronic conditions. As a part of the strategy to improve the care of people living with chronic conditions, disease management programs in Denmark require GPs and other health care workers to assess and support patients' self-care ability. The aim of the present study was to explore GPs' perceptions and assessment of self-care ability in patients with multiple chronic conditions who have difficulty following a given treatment.

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The world of tattooing and body art has never been like it is today. This chapter seeks to investigate this situation through the lens of tattooing. One of the areas in which tattooing has changed is the relationship between the tattoo artist and his or her clients.

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The increasing shortage of general practitioners (GPs) in Denmark is expected to continue until 2020. This study investigates the development of GP shortage in the communities of Region of Zealand in relation to patients' social deprivation. From 2010 to 2013 the number of GPs in the most affluent communities decreased by 2.

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The hybridisation and melting of DNA strands are critical steps in many biological processes, but still a deeper understanding of the kinetics is lacking. This is evident from the absence of a clear correlation between rate constants for duplex formation and the number of bases in the strand or the sequence. Here we have probed differences between formation times of A-tracts and AT-tracts by studying complementary model strands mainly comprised of adenine (A) and thymine (T) in stopped-flow (SF) experiments.

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Through interference with free radicals, the nitroxide tempol potentially increases bioavailability of nitric oxide (NO) and along with modulation of potassium channels reduces blood pressure (BP). We studied whether tempol in pigs lowers BP by mechanisms sensitive to inhibition of NO synthase or large conductance calcium-activated potassium channels (BKCa). The cardiovascular effects of intravenous tempol (25-50mg/kg) were examined in anesthetized pigs with myocardial function being evaluated by echocardiography.

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