2026

• Kjelle, E.; Brandsæter, Ingrid Øfsti; Porthun, J.; Hofmann, Bjørn Morten. (2026) Evaluation of a national intervention to reduce unnecessary brain magnetic resonance imaging in Norway – Effect on referral quality and justification rate. Radiography
  Vitenskapelig artikkel

2025

• Kjelle, Elin; Brandsæter, Ingrid Øfsti; Lauritzen, Peter Mæhre; Andersen, Eivind Richter; Porthun, Jan; Hofmann, Bjørn Morten. (2025) Quality of referrals and adherence to guidelines for adult patients with minimal to moderate head injuries in a selection of Norwegian hospitals. European Journal of Trauma and Emergency Surgery
  Vitenskapelig artikkel
• Hofmann, Bjørn Morten; Brandsæter, Ingrid Øfsti; Andersen, Eivind Richter; Kjelle, Elin. (2025) Hvordan forbedre de radiologiske tjenestene?. Hold Pusten
  Populærvitenskapelig artikkel
• Brandsæter, Ingrid Øfsti; Porthun, Jan; Andersen, Eivind Richter; Hofmann, Bjørn Morten; Kjelle, Elin. (2025) Temporal and geographical variations in musculoskeletal imaging: a register-based study in Norway with focus on potential low-value imaging. Research in Health Services and Regions
  Vitenskapelig artikkel
• Kjelle, Elin; Brandsæter, Ingrid Øfsti; Lauritzen, Peter Mæhre; Andersen, Eivind Richter; Porthun, Jan; Hofmann, Bjørn Morten. (2025) Quality of referrals and adherence to guidelines for adult patients with minimal to moderate head injuries in a selection of Norwegian hospitals. European Journal of Trauma and Emergency Surgery
  Vitenskapelig artikkel
• Brandsæter, Ingrid Øfsti; Porthun, Jan; Andersen, Eivind Richter; Hofmann, Bjørn Morten; Kjelle, Elin. (2025) Geographical variations and potential low-value neuroimaging examinations in Norway from 2013 to 2022. Research in Health Services and Regions
  Vitenskapelig artikkel

2024

• Kjelle, Elin; Brandsæter, Ingrid Øfsti; Andersen, Eivind Richter; Hofmann, Bjørn Morten. (2024) Cost of Low-Value Imaging Worldwide: A Systematic Review. Applied Health Economics and Health Policy
  Vitenskapelig oversiktsartikkel/review
• Hofmann, Bjørn Morten; Håvik, Vegard; Andersen, Eivind Richter; Brandsæter, Ingrid Øfsti; Kjelle, Elin. (2024) Low-value MRI of the knee in Norway: A register-based study to identify the proportion of potentially low-value MRIs and estimate the related costs. BMJ Open
  Vitenskapelig artikkel
• Hofmann, Bjørn Morten; Andersen, Eivind Richter; Brandsæter, Ingrid Øfsti; Clement, Fiona; Elshaug, Adam G; Bryan, Stirling. (2024) Success factors for interventions to reduce low-value imaging. Six crucial lessons learned from a practical case study in Norway. Current problems in diagnostic radiology
  Vitenskapelig artikkel
• Kjelle, Elin; Brandsæter, Ingrid Øfsti; Andersen, Eivind Richter; Hofmann, Bjørn Morten. (2024) Sustainability in healthcare by reducing low-value imaging – A narrative review. Radiography
  Vitenskapelig oversiktsartikkel/review
• Hofmann, Bjørn Morten; Brandsæter, Ingrid Øfsti; Andersen, Eivind Richter; Porthun, Jan; Kjelle, Elin. (2024) Temporal and geographical variations in diagnostic imaging in Norway. BMC Health Services Research
  Vitenskapelig artikkel
• Andersen, Eivind Richter; Hofmann, Bjørn Morten; Brandsæter, Ingrid Øfsti; Kjelle, Elin. (2024) Reducing low-value imaging—A qualitative evaluation of a pilot intervention in Norway. Journal of Evaluation In Clinical Practice
  Vitenskapelig artikkel
• Kjelle, Elin; Brandsæter, Ingrid Øfsti; Andersen, Eivind Richter; Hofmann, Bjørn Morten. (2024) Reducing low-value imaging - stakeholders' assessment of an intervention to improve imaging services. BMC Health Services Research
  Vitenskapelig artikkel
• Kjelle, Elin; Andersen, Eivind Richter; Brandsæter, Ingrid Øfsti; Hofmann, Bjørn Morten. (2024) Norwegian general practitioners’ and radiologists’ perspectives on the referral, justification, and unnecessary imaging—a survey. Scandinavian Journal of Primary Health Care
  Vitenskapelig artikkel

2023

• Aukan, Marthe Isaksen; Skårvold, Silje; Brandsæter, Ingrid Øfsti; Rehfeld, Jens Frederik; Holst, Jens Juul; Nymo, Siren. (2023) Gastrointestinal hormones and appetite ratings after weight loss induced by diet or bariatric surgery. Obesity
  Vitenskapelig artikkel
• Hofmann, Bjørn Morten; Brandsæter, Ingrid Øfsti; Kjelle, Elin. (2023) Variations in wait times for imaging services: a register-based study of self-reported wait times for specific examinations in Norway. BMC Health Services Research
  Vitenskapelig artikkel
• Andersen, Eivind Richter; Brandsæter, Ingrid Øfsti; Hofmann, Bjørn Morten; Kjelle, Elin. (2023) The use of low-value imaging: the role of referral practice and access to imaging services in a representative area of Norway. Insights into Imaging
  Vitenskapelig artikkel
• Hofmann, Bjørn Morten; Nomme, Fredrik; Schweder, Gregor Kai Jarosch von; Andersen, Eivind Richter; Brandsæter, Ingrid Øfsti; Kjelle, Elin. (2023) Riktigere bruk av bildediagnostikk. Utposten
  Fagartikkel
• Brandsæter, Ingrid Øfsti; Andersen, Eivind Richter; Hofmann, Bjørn Morten; Kjelle, Elin. (2023) Drivers for low-value imaging: a qualitative study of stakeholders’ perspectives in Norway. BMC Health Services Research
  Vitenskapelig artikkel

2022

• Aukan, Marthe Isaksen; Brandsæter, Ingrid Øfsti; Skårvold, Silje; Finlayson, Graham; Nymo, Siren; Coutinho, Silvia. (2022) Endring i hedonisk sult og matbelønning etter vekttap. Norsk tidsskrift for ernæring (NTFE)
  Sammendrag/Abstract
• Nomme, Fredrik; Schweder, Gregor von; Andersen, Eivind Richter; Brandsæter, Ingrid Øfsti; Kjelle, Elin; Hofmann, Bjørn Morten. (2022) Riktigere bruk av bildediagnostikk – et samarbeid mellom private røntgeninstitutt og forskere for å bedre henvisningskvalitet. Utposten
  Populærvitenskapelig artikkel
• Aukan, Marthe Isaksen; Brandsæter, Ingrid Øfsti; Skårvold, Silje; Finlayson, Graham; Nymo, Siren; Coutinho, Silvia. (2022) Changes in hedonic hunger and food reward after a similar weight loss induced by a very low-energy diet or bariatric surgery. Obesity
  Vitenskapelig artikkel