• Combined endorectal ultrasonography and strain elastography for the staging of early rectal cancer 

      Waage, Jo Erling Riise; Bach, Simon; Pfeffer, Frank; Leh, Sabine Maria; Havre, Roald Flesland; Ødegaard, Svein; Baatrup, Gunnar (Peer reviewed; Journal article, 2015-01)
      Aim: Strain elastography is a novel approach to rectal tumour evaluation. The primary aim of this study was to correlate elastography to pT stages of rectal tumours and to assess the ability of the method to differentiate ...
    • Controlled Attenuation Parameter in Healthy Individuals Aged 8–70 Years 

      Mjelle, Anders Batman; Mulabecirovic, Anesa; Olafsdottir, Edda Jonina; Gilja, Odd Helge; Havre, Roald Flesland; Vesterhus, Mette Nåmdal (Journal article; Peer reviewed, 2021)
      Purpose Controlled attenuation parameter (CAP) is a non-invasive method to assess the presence of liver steatosis. It has been evaluated in children and adults, mainly in either the obese or in subjects with suspected ...
    • Diagnostic accuracy of transabdominal ultrasound in chronic pancreatitis 

      Engjom, Trond; Sangnes, Dag André; Havre, Roald Flesland; Erchinger, Friedemann Georg; Pham, Khanh Do-Cong; Haldorsen, Ingfrid S.; Gilja, Odd Helge; Dimcevski, Georg Gjorgji (Peer reviewed; Journal article, 2017-04)
      The performance of transabdominal ultrasound (US) in chronic pancreatitis (CP) following the advances in US technology made during recent decades has not been explored. Our aim in this prospective study was to evaluate the ...
    • Endorectal ultrasonography, strain elastography and MRI differentiation of rectal adenomas and adenocarcinomas. 

      Waage, Jo Erling Riise; Leh, Sabine Maria; Røsler, Cornelia; Pfeffer, Frank; Bach, Simon; Havre, Roald Flesland; Haldorsen, Ingfrid S.; Ødegaard, Svein; Baatrup, Gunnar (Peer reviewed; Journal article, 2015-02)
      Aim Strain elastography is a method for recording tissue hardness. Strain in different areas may be compared using strain ratio (SR). The aims of this study were to validate a previously proposed SR cut-off value of 1.25 ...
    • Liver elastography in healthy children using three different systems - how many measurements are necessary? 

      Mjelle, Anders Batman; Mulabecirovic, Anesa; Havre, Roald Flesland; Olafsdottir, Edda Jonina; Gilja, Odd Helge; Vesterhus, Mette (Journal article; Peer reviewed, 2020-12-21)
      Purpose Liver elastography is increasingly being applied in screening for and follow-up of pediatric liver disease, and has been shown to correlate well with fibrosis staging through liver biopsy. Because time is of the ...
    • Navigated retrograde endoscopic myotomy (REM) for the treatment of therapy-resistant achalasia 

      Pham, Khanh Do-Cong; Havre, Roald Flesland; Langø, Thomas; Hofstad, Erlend Fagertun; Tangen, Geir Arne; Mårvik, Ronald; Pham, T.; Gilja, Odd Helge; Hatlebakk, Jan Gunnar; Viste, Asgaut (Peer reviewed; Journal article, 2018-04)
      Background In achalasia, muscle spasm may involve the proximal esophagus. When the muscle spasm is located in the proximal esophagus, conventional per oral endoscopic myotomy (POEM) may not be sufficient to relieve symptoms. ...
    • Normal Liver Stiffness Values in Children - A Comparison of Three Different Elastography Methods 

      Mjelle, Anders Batman; Mulabecirovic, Anesa; Havre, Roald Flesland; Rosendahl, Karen; Juliusson, Petur Benedikt; Olafsdottir, Edda Jonina; Gilja, Odd Helge; Vesterhus, Mette (Peer reviewed; Journal article, 2019-05)
      Objectives: Noninvasive tests for the evaluation of liver fibrosis are particularly helpful in children to avoid general anesthesia and potential complications of invasive tests. We aimed to establish reference values for ...
    • Surgical Treatment of Severe Bowel Obstruction as a Rare Complication Following Allogenic Hematopoietic Stem Cell Transplantation 

      Reikvam, Håkon; Tvedt, Tor Henrik Anderson; Johansen, Silje; Setran, Hege Aase; Havre, Roald Flesland (Journal article, 2020)
      Gastrointestinal graft-versus-host disease (GVHD) and cytomegalovirus (CMV) disease are common complications occurring after allogeneic hematopoietic stem cell transplantation (allo-HSCT), and contribute to a high degree ...
    • Tissue characterisation by ultrasound strain imaging. Methodological aspects and gastroenterological applications 

      Havre, Roald Flesland (Doctoral thesis, 2012-10-11)
      Real-Time Elastography (RTE) is a new imaging modality that monitors tissue strain during applied stress. The aim of this thesis was to validate if RTE was a reliable modality to reflect pathologically induced differences ...