Blar i ODA Open Digital Archive på forfatter "Johansen, Safora"
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A survey of diagnostic reference levels for head, chest and abdomen and pelvis CT in several private diagnostic facilities in Norway
Helgesen, Frida Gravdahl. (Master thesis, 2024)Background: Computed Tomography (CT) scans account for 60% of the total radiation dose in medical imaging. Literature has shown that patient dose varies across CT scanner design, diagnostic protocols, and technical parameters ... -
Advanced practice among diagnostic radiographers: - An International Survey
Lindgaard, Marte Flatøy (Master thesis, 2024)Introduction: As the global healthcare system evolves, diagnostic radiographers (DRs) are taking on advanced roles, constituting advanced radiography practice. This study explored the definition of ARP tasks among DRs, ... -
Construction and validation of a low cost paediatric pelvis phantom
Johansen, Safora; Hogg, Peter; Mohammad Ali, Ali; England, Andrew (European Journal of Radiology;Volume 108, November 2018, Journal article; Peer reviewed, 2018-09-14)PURPOSE: Imaging phantoms can be cost prohibitive, therefore a need exists to produce low cost alternatives which are fit for purpose. This paper describes the development and validation of a low cost paediatric pelvis ... -
Contrast medium protocols in routine chest CT:a survey study
Henning, Mette Karen; Aaløkken, Trond M; Johansen, Safora (Peer reviewed; Journal article, 2021)Background Administration of contrast medium (CM) is an important image quality factor in computed tomography (CT) of the chest. There is no clear evidence or guidelines on CM strategies for chest CT, thus a consensus ... -
The Effect of Cancer Patients’ and TheirFamily Caregivers’ Physical and EmotionalSymptoms on Caregiver Burden
Johansen, Safora; Småstuen, Milada C; Ruland, Cornelia (Journal article; Peer reviewed, 2017)BACKGROUND: Although there is significant evidence that the family caregivers (FCs) of cancer patients can experience significant caregiver burden and symptoms, less is known about the relationships between FCs and ... -
Evaluation of an in-use chest CT protocol in lung cancer screening - A single institutional study
Naimi, Salma; Tetteh, Mercy Afadzi; Ashraf, Haseem; Johansen, Safora (Acta Radiologica Open;, Peer reviewed; Journal article, 2024)Background: Lung cancer is the most common cause of cancer-related death worldwide and therefore there has been a growing demand for low-dose computed tomography (LDCT) protocols. Purpose: To investigate and evaluate ... -
The impact of body compositions on contrast medium enhancement in chest CT: a randomised controlled trial
Henning, Mette Karen; Aaløkken, Trond Mogens; Martinsen, Anne Catrine Trægde; Johansen, Safora (Peer reviewed; Journal article, 2023)Objective: To compare a fixed-volume contrast medium (CM) protocol with a combined total body weight (TBW) and body composition-tailored protocol in chest CT. Methods and materials: Patients referred for routine contrast ... -
Impact of hyperfractionated re-irradiation on quality of life in patients with recurrent or second primary head and neck cancer, a prospective single institutional study
Johansen, Safora; Amdal, Cecilie Delphin; Moan, Jon Magne; Dale, Einar; Falk, Ragnhild Sørum; Bjordal, Kristin (Peer reviewed; Journal article, 2023)Purpose Describe the clinical outcome of hyperfractionated re-irradiation (HFRT) in patients with recurrent or second primary (SP) head and neck cancer (HNC). Methods This prospective observational study included HNC ... -
Impact of iodine concentration and scan parameters on image quality, contrast enhancement and radiation dose in thoracic CT
Solbak, Marian S.; Henning, Mette Karen; England, Andrew; Martinsen, Anne Catrine Trægde; Aaløkken, Trond M; Johansen, Safora (European Radiology Experimental;4, Article number: 57 (2020), Journal article; Peer reviewed, 2020-09-11)Background: We investigated the impact of varying contrast medium (CM) densities and x-ray tube potentials on contrast enhancement (CE), image quality and radiation dose in thoracic computed tomography (CT) using two ... -
International student mobility in diagnostic radiography: Benefits and pitfalls
Di Michele, Laura; Tørris, Christine; Gunn, Catherine; Johansen, Safora (Peer reviewed; Journal article, 2024)Introduction: International student mobility (ISM) is increasingly utilised in higher education to allow students the opportunity to engage authentically with cultures outside their own, providing an oppor- tunity for ... -
Kartlegging av protokoll og stråledoser i forbindelse med neonatal røntgenbildetaking av lunger
Selvaratnam, Niruja (MABIO;2019, Master thesis, 2019)Bakgrunn og formål: Nyfødte er en pasientgruppe som er spesielt utsatt for et betydelig antall røntgenundersøkelser på grunn av respirasjons- og kardiovaskulære komplikasjoner. Disse kliniske tilstandene kan kreve opptil ... -
Lung cancer reirradiation: Exploring modifications to utilization, treatment modalities and factors associated with outcomes
Gullhaug, Anna; Haakensen, Vilde Drageset; De Ruysscher, Dirk; Simone, Charles B.; Hotca-Cho, Alexandra E.; Chhabra, Arpit M.; Hellebust, Taran Annette Paulsen; Paulsen, Erna-Elise; Dimopoulos, Maria P.; Johansen, Safora (Peer reviewed; Journal article, 2024)ABSTRACT Background: Patients treated for lung cancer (LC) often experience locoregional failure after initial treatment. Due to technological ad- vances, thoracic reirradiation (re-RT) has become a viable treatment option. ... -
A multi-institutional assessment of low-dose protocols in chest computed tomography: Dose and image quality
Tonkopi, Elena; Tetteh, Mercy Afadzi; Gunn, Catherine; Ashraf, Haseem; Rusten, Sigrid Lia; Safi, Perkhah; Tinsoe, Nora Suu; Colford, Kylie; Ouellet, Olivia; Naimi, Salma; Johansen, Safora (Acta Radiologica Open;, Peer reviewed; Journal article, 2024)Background: Low-dose CT (LDCT) chest protocols have widespread clinical applications for many indications; as a result, there is a need for protocol assessment prior to standardization. Dalhousie University and Oslo ... -
Patterns of local-regional recurrence after conformal and intensity-modulated radiotherapy for head and neck cancer
Johansen, Safora; Norman, Mathilde H.; Dale, Einar; Amdal, Cecilie Delphin; Furre, Torbjørn; Malinen, Eirik; Evensen, Jan Folkvard (Journal article; Peer reviewed, 2017)Aim To evaluate the patterns of loco-regional recurrences in head and neck cancer patients Methods Twenty-six out of 112 patients treated with primary or postoperative 3D CRT or IMRT for their primary and recurrent ... -
Recruitment challenges in clinical research including cancer patients and their caregivers. A randomized controlled trial study and lessons learned
Sygna, Karin; Johansen, Safora; Ruland, Cornelia (Trials;16(428), Journal article; Peer reviewed, 2015)Background: To test seven different strategies for recruitment in a randomized controlled trial, to report documented response data from each strategy, and to discuss recruitment challenges. Methods: We used 5 opt-in ... -
A Salutogenic Approach for Collaboration in Health and Technology
Berg, Arild Skarsfjord; Johansen, Safora; Lund, Anne; Riegler, Michael; Andersen, Jorunn Marie (Chapter, 2023)Through collaboration, health services and health-promoting environments can be influenced by patients, health professionals, and stakeholders. Antonovsky’s concept of salutogenesis includes the promotion of a sense of ... -
Strategies for calculating contrast media dose for chest CT
Johansen, Safora; Henning, Mette Karen; Gunn, Catherine; Arenas-Jiménez, Juan (Journal article; Peer reviewed, 2023)Background Total body weight (TBW) is a frequently used contrast media (CM) strategy for dose calculation in enhanced CT, yet it is suboptimal as it lacks consideration of patient characteristics, such as body fat percentage ... -
A survey of local diagnostic reference levels for the head, thorax, abdomen and pelvis computed tomography in Norway and Canada
Johansen, Safora (Acta Radiologica Open;Volume 11, Issue 10, Peer reviewed; Journal article, 2022-10-07)Background: Computed tomography (CT) contributes to 60% of the collective dose in medical imaging. Literature has demonstrated that patient dose varies across regions and countries. Establishing diagnostic reference levels ... -
Survey of Radiation Therapists’ Current Practices and Perceptions of Psychosocial and Supportive Care in Canada and Norway
Aas, Espen (Master thesis, 2024)Abstract Purpose Many cancer patients undergoing radiation therapy report unmet psychosocial needs, which can negatively impact their treatment outcomes and quality of life. This study explored the current practices and ... -
A survey to explore the psychological impact of the COVID-19 pandemic on radiation therapists in Norway and Canada: A tale of two countries
Morassaei, Sara; Di Prospero, Lisa; Ringdalen, Elisabeth; Olsen, Sunniva S.; Korsell, Agnethe; Erler, Darby; Ying, Carmen; Ho Choi, Sang; Bolderston, Amanda; Middleton, Jacqueline; Johansen, Safora (Journal of Medical Radiation Sciences (JMRS);Volume 68, Issue 4, Peer reviewed; Journal article, 2021-10-29)Introduction: Several studies have demonstrated the psychological impact of the COVID-19 pandemic on health care providers. However, there is little known about how the COVID-19 pandemic has impacted radiation therapists ...