Publications by authors named "Vibeke Hansen"

Article Synopsis
  • The study aimed to identify the maximum tolerated dose (MTD) for treating muscle invasive bladder cancer using image-guided adaptive radiation therapy while monitoring long-term clinical outcomes.
  • A total of 59 patients with specific stages of bladder cancer participated, with their tumors receiving doses ranging from 68 to 72 Gy, and the MTD was found to be 70 Gy.
  • Results showed that 5-year overall survival was 58%, and the bladder preservation rate was high at 89%, with minimal severe acute toxicities reported.
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Article Synopsis
  • Radiotherapy trial quality assurance (RT QA) is essential for ensuring safe and consistent radiation treatment across different institutions, focusing on adaptive methods like Image-Guided Radiotherapy (IGRT) in the RAIDER trial for bladder cancer.
  • This study analyzed data from 72 participants over 884 Cone-Beam Computed Tomography (CBCT) scans to compare online and offline treatment plan selections, revealing an overall concordance rate of 83%.
  • Results showed an improvement in concordance from 75% in the first stage of the trial to 91% in the second stage, emphasizing the importance of ongoing QA support during the introduction of new radiotherapy techniques.
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Background: People with a mental health condition experience a high prevalence of chronic disease risk behaviours e.g., tobacco smoking and physical inactivity.

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  • A study aimed to explore how a chatbot could be integrated into a healthy eating website to better engage young adults and promote healthier eating habits.
  • Eighteen interviews were conducted with three groups: dietary behavior experts, young adult website users, and chatbot design experts, utilizing a behavioral change framework for data analysis.
  • Key findings revealed three main potential roles for the chatbot: enhancing healthy eating knowledge, reducing time barriers to healthy eating, and providing support/social engagement, with specific features suggested for each role to optimize user experience and effectiveness.
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Background And Purpose: Radiotherapy for vulvar carcinoma is challenging due to relatively high risk of locoregional disease recurrence, a technically challenging target, and postoperative lymphocele, and a high risk radiation sequelae. We aim to explore, if it is possible to reduce dose to normal tissue, while maintaining CTV coverage for this patient group with online adaptive radiotherapy.

Materials And Methods: 20 patients with vulvar carcinoma (527 fractions) were treated with online adaptation on a Varian Ethos accelerator.

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To explore young adult's experiences of how starting university influenced their physical activity, diet, sleep, and mental well-being, and barriers and enablers to health behavior change. University students aged 18-25 years. Three focus groups were conducted in November 2019.

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Two multicentre adaptive radiotherapy trials utilising Plan of the Day (PoD) with a library of plans were introduced in 35 centres. The common issues that arose from all centres when introducing PoD were collated retrospectively, through reviewing the data pertaining to the pre-trial and on-trial quality assurance programme. It was found that 1,295 issues arose when introducing PoD in outlining, planning, treatment delivery i.

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Background: The COVID-19 global pandemic greatly impacted lifestyles and physical activity routines. This study explored how the COVID-19 pandemic impacted participant experience and motivation in ecofit, a large, community-based, multicomponent intervention that supports aerobic and resistance-based physical activity using publicly available, outdoor exercise facilities and smartphone technology.

Methods: Fifteen participants from the intervention arm of the study were interviewed.

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Despite increasing rates of co-morbid depression and obesity, few interventions target both conditions simultaneously, particularly in men. The trial, conducted in 125 men with depressive symptoms and overweight or obesity, tested the efficacy of a gender-tailored eHealth program with integrated mental health support. The aims of this study were to examine the perceptions of men who received the intervention in relation to recruitment, satisfaction with the program, and suggestions to improve the program.

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Background: People with a mental health condition experience a greater prevalence of chronic disease and reduced life expectancy compared to the general population. Modifiable health risk behaviours, such as physical inactivity and poor nutrition are major contributing factors. Population-level health coaching delivering behavioural change support via telephone for healthy eating, physical activity, and weight management is an opportunity utilised by this group to support improvement in healthy lifestyle behaviours.

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Background: The standard in Denmark for treating breast cancer patients receiving loco-regional irradiation is tangential 3D Conformal RadioTherapy (3DCRT), treated in deep inspiration breath-hold (DIBH). Treating with Volumetric Modulated Arc Therapy (VMAT) may reduce the treatment time, which is particularly important for DIBH treatments. The VMAT should be performed without increased dose to the heart, lung, and contralateral breast.

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Magnetic resonance imaging (MRI) has exquisite soft-tissue contrast and is the foundation for image guided radiotherapy (IGRT) with integrated magnetic resonance linacs. However, MRI suffers from geometrical distortions. In this study the MRI system- and patient-induced geometric distortion at four different tumor-sites was investigated: adrenal gland (7 patients), liver (4 patients), pancreas (6 patients), prostate (20 patients).

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Introduction: Daily radiotherapy delivered with radiosensitisation offers patients with muscle invasive bladder cancer (MIBC) comparable outcomes to cystectomy with functional organ preservation. Most recurrences following radiotherapy occur within the bladder. Increasing the delivered radiotherapy dose to the tumour may further improve local control.

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The clinical introduction of hybrid magnetic resonance (MR) guided radiotherapy (RT) delivery systems has led to the need to validate the end-to-end dose delivery performance on such machines. In the current study, an MR visible phantom was developed and used to test the spatial deviation between planned and delivered dose at two 1.5 T MR linear accelerator (MR linac) systems, including pre-treatment imaging, dose planning, online imaging, image registration, plan adaptation, and dose delivery.

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Purpose: Hypofractionated radiation therapy can be used to treat patients with muscle-invasive bladder cancer unable to have radical therapy. Toxicity is a key concern, but adaptive plan-of the day (POD) image-guided radiation therapy delivery could improve outcomes by minimizing the volume of normal tissue irradiated. The HYBRID trial assessed the multicenter implementation, safety, and efficacy of this strategy.

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This study explores patients' experiences of how antidepressant medication transition events (ceasing, changing or reducing) affect employment and workplace functioning. An anonymous online survey was conducted with adults who had experienced antidepressant medication transition events (AMTEs). Data were analyzed using a hybrid inductive and deductive thematic analysis approach.

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Objectives: To investigate how individuals with a history of affective disorder use and perceive their use of social media and online dating.

Methods: A questionnaire focusing on affective disorders and the use of social media and online dating was handed out to outpatients from unipolar depression and bipolar disorder clinics and general practice patients with or without a history of affective disorders (latter as controls). The association between affective disorders and use of social media and online dating was analysed using linear/logistic regression.

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Objectives: The DANHEART trial is a multicenter, randomized (1:1), parallel-group, double-blind, placebo-controlled study in chronic heart failure patients with reduced ejection fraction (HFrEF). This investigator driven study will include 1500 HFrEF patients and test in a 2 × 2 factorial design: 1) if hydralazine-isosorbide dinitrate reduces the incidence of death and hospitalization with worsening heart failure vs. placebo (H-HeFT) and 2) if metformin reduces the incidence of death, worsening heart failure, acute myocardial infarction, and stroke vs.

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Introduction: The benefits of prehospital electrocardiograms (ECG) for patients with ST-elevation myocardial infarction (STEMI) are well-known. Evaluation of the present algorithm for prehospital ECG transmission is important to ensure correct and expeditious patient care. The purpose of this study was to evaluate ECGs transmitted from the prehospital setting to a non-invasive department of cardiology.

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Introduction: Patients with muscle invasive bladder cancer (MIBC) who are unfit and unsuitable for standard radical treatment with cystectomy or daily radiotherapy present a large unmet clinical need. Untreated, they suffer high cancer specific mortality and risk significant disease-related local symptoms. Hypofractionated radiotherapy (delivering higher doses in fewer fractions/visits) is a potential treatment solution but could be compromised by the mobile nature of the bladder, resulting in target misses in a significant proportion of fractions.

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Article Synopsis
  • The World Health Organization emphasizes that palliative care should be accessible to everyone with life-threatening diseases, yet current global practices primarily focus on cancer patients.
  • A task force in Denmark created a national position statement aimed at implementing palliative care for severe heart disease, highlighting the need for tools to identify when and how to provide this care.
  • The position statement offers practical guidance for managing symptoms across different stages of advanced heart disease, underscores the importance of communication, and advocates for multidisciplinary collaboration in care delivery.
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Introduction: Total body irradiation (TBI) is a part of the conditioning regimen for bone marrow transplant.At the Royal Marsden (Sutton, UK) and Rigshospitalet (Copenhagen, Denmark), we introduced a step and shoot IMRT (SS IMRT) technique for TBI. This technique requires no equipment other than that used to deliver other external beam radiation.

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Healthcare authorities have emphasised the need to develop palliative care for everybody suffering from life-threatening diseases, including people suffering from medical organ failure. In 2011, the Danish Health Authority requested that all medical associations developed guidelines for palliative care. Until now, this has been fulfilled by only four associations.

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Background And Purpose: Hypofractionated bladder RT with or without image guided adaptive planning (HYBRID) is a multicentre clinical trial investigating "Plan of the Day" (PoD) adaptive radiotherapy for bladder cancer. To ensure correct PoD selection a pre-accrual guidance and assessment module was developed as part of an image guided radiotherapy quality assurance (IGRT QA) credentialing programme. This study aimed to evaluate its feasibility and effectiveness across multiple recruiting centres.

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