Per Kristian Hol

• Carling, Johan Ulrik; Barkhatov, Leonid; Reims, Henrik Mikael; Storås, Tryggve; Courivaud, Fredric A A; Kazaryan, Airazat M.; Halvorsen, Per Steinar; Dorenberg, Eric Jürgen; Edwin, Bjørn & Hol, Per Kristian (2019). Can we ablate liver lesions close to large portal and hepatic veins with MR-guided HIFU? An experimental study in a porcine model. European Radiology.  ISSN 0938-7994.  29(9), s 5013- 5021 . doi: 10.1007/s00330-018-5996-8
• Bøen, Erlend; Hjornevik, Trine; Hummelen, Benjamin; Elvsåshagen, Torbjørn; Moberget, Torgeir; Holtedahl, Jon Erik; Babovic, Almira; Hol, Per Kristian; Karterud, Sigmund & Malt, Ulrik Fredrik (2019). Patterns of altered regional brain glucose metabolism in borderline personality disorder and bipolar II disorder. Acta Psychiatrica Scandinavica.  ISSN 0001-690X.  139(3), s 256- 268 . doi: 10.1111/acps.12997
• Kåsine, Trine; Romundstad, Luis Georg; Rosseland, Leiv Arne; Ullensvang, Kyrre; Fagerland, Morten; Hol, Per Kristian; Kessler, Paul & Sauter, Axel Rudolf (2019). Needle tip tracking for ultrasound-guided peripheral nerve block procedures-An observer blinded, randomised, controlled, crossover study on a phantom model. Acta Anaesthesiologica Scandinavica.  ISSN 0001-5172. . doi: 10.1111/aas.13379 Full text in Research Archive. Show summary

  Background: The Onvision™ needle tip tracking (NTT) is new technology consisting of a needle with an ultrasound sensor close to the needle tip and a console for computerized signal processing. The aim of the study was to evaluate NTT technology during ultrasound guided simulated peripheral nerve block procedures in a porcine phantom model. Methods: Forty anaesthesiologists performed in-plane and out-of-plane simulated nerve blocks with and without NTT guidance. The primary outcome measure was procedure time. Secondary outcomes were hand movements and the path length travelled by the hands measured by motion analysis, precision of the needle tip related to the target structure, success rates, violations of the target structure, and the participants confidence whether their procedure would be successful or not. Results: Procedure time, was reduced from 66.7 (SD 47.5) sec to 43.8 (SD 29.2) sec when NTT was used for out-of-plane procedures (p = 0.002). The number of hand movements of the probe hand was 13.9 (SD 30.2) with NTT and 22.8 (SD 30.0) without NTT (p = 0.019). No significant differences were registered during the performance of in-plane procedures. The participants confidence in a presumed block success was increased with both in-plane procedures (8.50 (SD 1.18) with NTT vs 7.65 (SD 1.96), P = 0.004) and out-of-plane procedures (8.50 (SD 1.09) vs 7.10 (SD 1.89) P = 0.0001). Conclusions: The new NTT technology, significantly reduced procedure time and the number of hand movements for ultrasound guided out-of-plane PNB procedures. No significant differences were found for the in-plane procedures.

• Vatnehol, Svein Are Sirirud; Hol, Per Kristian; Bjørnerud, Atle; Amiry-Moghaddam, Mahmood; Haglerød, Camilla Margrete & Storås, Tryggve (2019). Determination of oxygen r1 at 3 Tesla using samples with a concentration range of dissolved oxygen. Magnetic Resonance Materials in Physics, Biology and Medicine.  ISSN 0968-5243.  s 1- 7 . doi: 10.1007/s10334-019-00783-x Full text in Research Archive.
• Vatnehol, Svein Are Sirirud; Hol, Per Kristian; Bjørnerud, Atle; Amiry-Moghaddam, Mahmood; Haglerød, Camilla Margrete & Storås, Tryggve (2019). Precision of T1-relaxation time measurements in the hepatic portal vein: influence of measurement technique and sequence parameters.. Magnetic Resonance Materials in Physics, Biology and Medicine.  ISSN 0968-5243.  32(3), s 359- 368 . doi: 10.1007/s10334-018-00731-1
• Bjørnerud, Atle; Vatnehol, Svein Are Sirirud; Larsson, Christopher; Due-Tønnessen, Paulina; Hol, Per Kristian & Groote, Inge Rasmus (2017). Signal enhancement of the dentate nucleus at unenhanced MR imaging after very high cumulative doses of the macrocyclic gadolinium-based contrast agent gadobutrol: An observational study. Radiology.  ISSN 0033-8419.  285(2), s 434- 444 . doi: 10.1148/radiol.2017170391 Full text in Research Archive.
• Bürker, Britta Susanne; Gullestad, Lars; Gude, Einar; Relbo, Anne; Grov, Ingelin; Hol, Per Kristian; Andreassen, Arne K.; Arora, Satish; Dew, Mary Amanda; Fiane, Arnt E; Haraldsen, Ira Hebold; Malt, Ulrik Fredrik & Andersson, Stein (2017). Cognitive function after heart transplantation: Comparing everolimus-based and calcineurin inhibitor-based regimens. Clinical Transplantation.  ISSN 0902-0063.  31(4) . doi: 10.1111/ctr.12927
• Kjelstrup, Trygve; Sauter, Axel Rudolf & Hol, Per Kristian (2017). The relationship of the musculocutaneous nerve to the brachial plexus evaluated by MRI. Journal of clinical monitoring and computing.  ISSN 1387-1307.  31(1), s 111- 115 . doi: 10.1007/s10877-015-9807-3 Full text in Research Archive.
• Elvsåshagen, Torbjørn; Zuzarte, Pedro; Westlye, Lars Tjelta; Bøen, Erlend; Josefsen, Dag; Boye, Birgitte; Hol, Per Kristian; Malt, Ulrik Fredrik; Young, L Trevor & Andreazza, Ana C (2016). Dentate gyrus-cornu ammonis (CA) 4 volume is decreased and associated with depressive episodes and lipid peroxidation in bipolar II disorder: Longitudinal and cross-sectional analyses. Bipolar Disorders.  ISSN 1398-5647.  18(8), s 657- 668 . doi: 10.1111/bdi.12457
• Mathiassen, Kim; Fjellin, Jørgen Enger; Glette, Kyrre Harald; Hol, Per Kristian & Elle, Ole Jakob (2016). An Ultrasound Robotic System Using the Commercial Robot UR5. Frontiers in Robotics and AI.  ISSN 2296-9144.  3 . doi: 10.3389/frobt.2016.00001 Full text in Research Archive. Show summary

  The use of robots in health care has increased dramatically over the last decade. One area of research has been to use robots to conduct ultrasound examinations, either controlled by a physician or autonomously. This paper examines the possibility of using the commercial robot UR5 from Universal Robots to make a tele-operated robotic ultrasound system. Physicians diagnosing patients using ultrasound probes are prone to repetitive strain injuries, as they are required to hold the probe in uncomfortable positions and exert significant static force. The main application for the system is to relieve the physician of this strain by letting the them control a robot that holds the probe. A set of requirements for the system is derived from the state-of-the-art systems found in the research literature. The system is developed through a low-level interface for the robot, effectively building a new software framework for controlling it. Compliance force control and forward flow haptic control of the robot was implemented. Experiments are conducted to quantify the performance of the two control schemes. The force control is estimated to have a bandwidth of 16.6 Hz, while the haptic control is estimated to have a bandwidth of 65.4 Hz for the position control of the slave and 13.4 Hz for the force control of the master. Overall, the system meets the derived requirements and the main conclusion is that it is feasible to use the UR5 robot for robotic ultrasound applications.

• Skagen, Karolina Ryeng; Evensen, Kristin; Scott, Helge; Krohg-Sørensen, Kirsten; Vatnehol, Svein Are; Hol, Per Kristian; Skjelland, Mona & Russell, David (2016). Semiautomated magnetic resonance imaging assessment of carotid plaque lipid content. Journal of Stroke & Cerebrovascular Diseases.  ISSN 1052-3057.  25(8), s 2004- 2010 . doi: 10.1016/j.jstrokecerebrovasdis.2016.01.043
• Tornås, Sveinung; Løvstad, Marianne; Solbakk, Anne-Kristin; Evans, Jonathan; Endestad, Tor; Hol, Per Kristian; Schanke, Anne-Kristine & Stubberud, Jan (2016). Rehabilitation of Executive Functions in Patients with Chronic Acquired Brain Injury with Goal Management Training, External Cuing, and Emotional Regulation: A Randomized Controlled Trial. Journal of the International Neuropsychological Society.  ISSN 1355-6177.  22(4), s 436- 452 . doi: 10.1017/S1355617715001344
• Auning, Eirik; Selnes, Per; Grambaite, Ramune; Saltyte Benth, Jurate; Haram, Astrid; Løvli, Ane Oppi; Bjørnerud, Atle; Hessen, Erik; Hol, Per Kristian; Løndalen, Ayca Muftuler; Fladby, Tormod & Aarsland, Dag (2015). Neurobiological correlates of depressive symptoms in people with subjective and mild cognitive impairment. Acta Psychiatrica Scandinavica.  ISSN 0001-690X.  131(2), s 139- 147 . doi: 10.1111/acps.12352
• Greisiger, Ralf; Shallop, Jon K.; Hol, Per Kristian; Elle, Ole Jakob & Jablonski, Greg (2015). Cochlear implantees: Analysis of behavioral and objective measures for a clinical population of various age groups. Cochlear Implants International.  ISSN 1467-0100.  16(4), s 1- 19 . doi: 10.1080/14670100.2015.1110372
• Ramm-Pettersen, Jon-Terje; Halvorsen, Helene; Evang, Johan Arild; RØNNING, PÅL ANDRE; Hol, Per Kristian; Bollerslev, Jens; Berg-Johnsen, Jon & Helseth, Eirik (2015). Low immediate postoperative serum-cortisol nadir predicts the short-term, but not long-term, remission after pituitary surgery for Cushing's disease. BMC Endocrine Disorders.  ISSN 1472-6823.  15:62 . doi: 10.1186/s12902-015-0055-9 Show summary

  Background: Cushing’s disease is an ACTH-producing pituitary adenoma, and the primary treatment is microscopic or endoscopic transsphenoidal selective adenectomy. The aims of the present study were to evaluate whether the early postoperative S-cortisol level can serve as a prognostic marker for short- and long-term remission, and retrospectively review our own short and long term results after surgery for Cushing’s disease. Methods: This single centre, retrospective study consists of 19 consecutive patients with Cushing’s disease who underwent transsphenoidal surgery. S-cortisol was measured every 6 h after the operation without any glucocorticoid replacement. We have follow-up on all patients, with a mean follow-up of 68 months. Results: At the three-month follow-up, 16 patients (84 %) were in remission; at 12 months, 18 (95 %) were in remission and at the final follow-up (mean 68 months), 13 (68 %) were in remission. Five-years recurrence rate was 26 %. The mean postoperative S-cortisol nadir was significantly lower in the group of patients in remission than in the non-remission group at 3 months, but there was no difference between those in long-term remission compared to those in long-term non-remission. The optimal cut-off value for classifying 3-month remission was 74 nmol/l. Conclusion: We achieved a 95 % 1-year remission rate with transsphenoidal surgery for Cushing’s disease in this series of consecutive patients. However, the 5-year recurrence rate was 26 %, showing the need for regular clinical and biochemical controls in this patient group. The mean postoperative serum-cortisol nadir was significantly lower in patients in remission at 3 months compared to patients not in remission at 3 months, but a low postoperative S-cortisol did not predict long-term remission.

• Bøen, Erlend; Westlye, Lars Tjelta; Elvsåshagen, Torbjørn; Hummelen, Benjamin; Hol, Per Kristian; Boye, Turid Birgitte; Andersson, Stein; Karterud, Sigmund & Malt, Ulrik Fredrik (2014). Smaller stress-sensitive hippocampal subfields in women with borderline personality disorder without posttraumatic stress disorder. Journal of Psychiatry & Neuroscience.  ISSN 1180-4882.  39(2), s 127- 134 . doi: 10.1503/jpn.130070.
• Courivaud, Fredric A A; Kazaryan, Airazat M.; Lund, Alice; Orszagh, Vivian C; Svindland, Aud; Marangos, Irina Pavlik; Halvorsen, Per Steinar; Jebsen, Peter Wilhelm; Fosse, Erik; Hol, Per Kristian & Edwin, Bjørn (2014). Thermal fixation of swine liver tissue after magnetic resonance-guided high-intensity focused ultrasound ablation. Ultrasound in Medicine and Biology.  ISSN 0301-5629.  40(7), s 1564- 1577 . doi: 10.1016/j.ultrasmedbio.2014.02.007
• El-Dirdiri, Abubakr El-Tahir Mohamed; Courivaud, Fredric A A; Palomar, Rafael; Hol, Per Kristian & Elle, Ole Jakob (2014). Catheter tip tracking for MR-guided interventions using discrete Kalman filter and mean shift localization. International Journal of Computer Assisted Radiology and Surgery.  ISSN 1861-6410.  9(2), s 313- 322 . doi: 10.1007/s11548-013-0933-4
• Elvsåshagen, Torbjørn; Moberget, Torgeir; Bøen, Erlend; Hol, Per Kristian; Malt, Ulrik Fredrik; Andersson, Stein & Westlye, Lars Tjelta (2014). The surface area of early visual cortex predicts the amplitude of the visual evoked potential. Brain Structure and Function.  ISSN 1863-2653. . doi: 10.1007/s00429-013-0703-7
• Kjelstrup, Trygve; Hol, Per Kristian; Courivaud, Fredric A A; Smith, Hans-Jørgen; Røkkum, Magne & Klaastad, Øivind (2014). MRI of axillary brachial plexus blocks: A randomised controlled study. European Journal of Anaesthesiology.  ISSN 0265-0215.  31(11), s 611- 619 . doi: 10.1097/EJA.0000000000000122
• Roy, Sumit K & Hol, Per Kristian (2014). Percutaneous closure of catheter enterotomy: Feasibility determination in vivo. MITAT. Minimally invasive therapy & allied technologies.  ISSN 1364-5706.  23(1), s 32- 39 . doi: 10.3109/13645706.2013.827121
• Strømmen, Kenneth; Blakstad, Elin Wahl; Moltu, Sissel; Almaas, Astrid; Westerberg, Ane Cecilie; Amlien, Inge; Rønnestad, Arild Erlend; Nakstad, Britt; Drevon, Christian A; Bjørnerud, Atle; Courivaud, Fredric A A; Hol, Per Kristian; Veierød, Marit Bragelien; Fjell, Anders Martin; Walhovd, Kristine B & Iversen, Per Ole (2014). Enhanced Nutrient Supply to Very Low Birth Weight Infants is Associated with Improved White Matter Maturation and Head Growth. Neonatology.  ISSN 1661-7800.  107(1), s 68- 75 . doi: 10.1159/000368181
• Bøen, Erlend; Westlye, Lars Tjelta; Elvsåshagen, Torbjørn; Hummelen, Benjamin; Hol, Per Kristian; Boye, Birgitte; Andersson, Stein; Karterud, Sigmund & Malt, Ulrik Fredrik (2013). Regional cortical thinning may be a biological marker for borderline personality disorder. Acta Psychiatrica Scandinavica.  ISSN 0001-690X.  130(3), s 193- 204 . doi: 10.1111/acps.12234
• Dorenberg, Eric Jürgen; Courivaud, Fredric A A; Ring, Eva Kristina; Hald, Kirsten; Jakobsen, Jarl Åsbjørn; Fosse, Erik & Hol, Per Kristian (2013). Volumetric ablation of uterine fibroids using Sonalleve high-intensity focused ultrasound in a 3 Tesla scanner - first clinical assessment. MITAT. Minimally invasive therapy & allied technologies.  ISSN 1364-5706.  22(2), s 73- 79 . doi: 10.3109/13645706.2012.702672
• Elvsåshagen, Torbjørn; Westlye, Lars Tjelta; Bøen, Erlend; Hol, Per Kristian; Andersson, Stein; Andreassen, Ole Andreas; Boye, Turid Birgitte & Malt, Ulrik Fredrik (2013). Evidence for reduced dentate gyrus and fimbria volume in bipolar II disorder. Bipolar Disorders.  ISSN 1398-5647.  15(2), s 167- 176 . doi: 10.1111/bdi.12046
• Elvsåshagen, Torbjørn; Westlye, Lars Tjelta; Bøen, Erlend; Hol, Per Kristian; Andreassen, Ole Andreas; Boye, Turid Birgitte & Malt, Ulrik Fredrik (2013). Bipolar II disorder is associated with thinning of prefrontal and temporal cortices involved in affect regulation. Bipolar Disorders.  ISSN 1398-5647.  15(8), s 855- 864 . doi: 10.1111/bdi.12117
• Sundseth, Jarle; Jacobsen, Eva Astrid; Kolstad, Frode; Nygaard, Øystein Petter; Zwart, John-Anker & Hol, Per Kristian (2013). Magnetic resonance imaging evaluation after implantation of a titanium cervical disc prosthesis: a comparison of 1.5 and 3 Tesla magnet strength. European spine journal.  ISSN 0940-6719.  22(10), s 2296- 2302 . doi: 10.1007/s00586-013-2994-z
• Dorenberg, Eric Jürgen; Hol, Per Kristian; Jakobsen, Jarl Åsbjørn & Ring, Eva Kristina (2012). Improved infarction rates in fibroids after the introduction of contrast-enhanced ultrasound during uterine artery embolization. Acta Radiologica.  ISSN 0284-1851.  53(1), s 34- 38 . doi: 10.1258/ar.2011.110331
• Kjelstrup, Trygve; Courivaud, Fredric A A; Klaastad, Øivind; Breivik, Harald & Hol, Per Kristian (2012). High-resolution MRI demonstrates detailed anatomy of the axillary brachial plexus. A pilot study. Acta Anaesthesiologica Scandinavica.  ISSN 0001-5172.  56(7), s 914- 919 . doi: 10.1111/j.1399-6576.2012.02703.x
• Martinsen, Anne Catrine Trægde; Sæther, Hilde Kjernlie; Hol, Per Kristian; Olsen, Dag Rune & Skaane, Per (2012). Iterative reconstruction reduces abdominal CT dose. European Journal of Radiology.  ISSN 0720-048X.  81(7), s 1483- 1487 . doi: 10.1016/j.ejrad.2011.04.021
• Bergsland, Jacob; Hol, Per Kristian; Lingaas, Per Snorre; Lundblad, Runar; Rein, Kjell Arne & Fosse, Erik (2011). Long-Term Follow-Up of Patients Operated With the Symmetry Proximal Connector Device. Innovations (Philadelphia): technology and techniques in cardiothoracic and vascular surgery.  ISSN 1556-9845.  6(1), s 15- 16 . doi: 10.1097/IMI.0b013e31820c7e80
• Greisiger, Ralf; Tvete, Ole; Shallop, Jon K.; Elle, Ole Jakob; Hol, Per Kristian & Jablonski, Greg (2011). Cochlear implant-evoked electrical auditory brainstem responses during surgery in patients with auditory neuropathy spectrum disorder. Cochlear Implants International.  ISSN 1467-0100.  12, s 58- 60 . doi: 10.1179/146701011X13001035753137
• Grenne, Bjørnar Leangen; Eek, Christian; Sjøli, Benthe; Dahlslett, Thomas; Hol, Per Kristian; Ørn, Stein; Skulstad, Helge; Smiseth, Otto A.; Edvardsen, Thor & Brunvand, Harald (2011). Mean Strain Throughout the Heart Cycle by Longitudinal Two-Dimensional Speckle-Tracking Echocardiography Enables Early Prediction of Infarct Size. Journal of the American Society of Echocardiography.  ISSN 0894-7317.  24(10), s 1118- 1125 . doi: 10.1016/j.echo.2011.06.002
• Ramm-Pettersen, Jon-Terje; Berg-Johnsen, Jon; Hol, Per Kristian; Roy, Sumit K; Bollerslev, Jens; Schreiner, Thomas & Helseth, Eirik (2011). Intra-operative MRI facilitates tumour resection during trans-sphenoidal surgery for pituitary adenomas. Acta Neurochirurgica.  ISSN 0001-6268.  153(7), s 1367- 1373 . doi: 10.1007/s00701-011-1004-7
• Mathisen, Lars; Lingaas, Per Snorre; Andersen, Marit Helen; Hol, Per Kristian; Fredriksen, Per Morten; Sundet, Kjetil; Rokne, Berit; Wahl, Astrid Klopstad & Fosse, Erik (2010). Changes in cardiac and cognitive function and self-reported outcomes at one year after coronary artery bypass grafting. Journal of Thoracic and Cardiovascular Surgery.  ISSN 0022-5223.  140(1), s 122- 128 . doi: 10.1016/j.jtcvs.2009.10.034
• Eek, Christian; Grenne, Bjørnar Leangen; Brunvand, Harald; Aakhus, Svend; Endresen, Knut; Hol, Per Kristian; Smith, Hans-Jørgen; Smiseth, Otto A.; Edvardsen, Thor & Skulstad, Helge (2010). Strain Echocardiography and Wall Motion Score Index Predicts Final Infarct Size in Patients With Non-ST-Segment-Elevation Myocardial Infarction. Circulation Cardiovascular Imaging.  ISSN 1941-9651.  3(2), s 187- 194 . doi: 10.1161/CIRCIMAGING.109.910521
• Grenne, Bjørnar Leangen; Eek, Christian; Sjøli, Benthe; Dahlslett, Thomas; Uchto, Michael; Hol, Per Kristian; Skulstad, Helge; Smiseth, Otto A.; Edvardsen, Thor & Brunvand, Harald (2010). Acute coronary occlusion in non-ST-elevation acute coronary syndrome: outcome and early identification by strain echocardiography. Heart.  ISSN 1355-6037.  96(19), s 1550- 1556 . doi: 10.1136/hrt.2009.188391
• Martinsen, Ørjan Grøttem; Kalvøy, Håvard; Grimnes, Sverre; Nordbotten, Bernt Jørgen; Hol, Per Kristian; Fosse, Erik; Myklebust, Helge & Becker, Lance B (2010). Invasive electrical impedance tomography for blood vessel detection. Open Biomedical Engineering Journal.  ISSN 1874-1207.  4, s 135- 137 . doi: 10.2174/1874120701004010135
• Bergsland, Jacob; Lingaas, Per Snorre; Skulstad, Helge; Hol, Per Kristian; Halvorsen, Per Steinar; Andersen, Rune; Småstuen, Milada C; Lundblad, Runar; Svennevig, Jan Ludvig; Andersen, Kai & Fosse, Erik (2009). Intracoronary Shunt Prevents Ischemia in Off-Pump Coronary Artery Bypass Surgery. Annals of Thoracic Surgery.  ISSN 0003-4975.  87(1), s 54- 60 . doi: 10.1016/j.athoracsur.2008.08.032
• Kvaløy, Håvard; Frich, Lars Inge; Grimnes, Sverre; Martinsen, Ørjan Grøttem; Hol, Per Kristian & Stubhaug, Audun (2009). Impedance-based tissue discrimination for needle guidance. Physiological Measurement.  ISSN 0967-3334.  30(2), s 129- 140 . doi: 10.1088/0967-3334/30/2/002
• Kvarstein, Gunnvald; Måwe, Leif; Indahl, A; Hol, Per Kristian; Tennøe, Bjørn; Digernes, R; Stubhaug, Audun; Tønnessen, Tor Inge & Breivik, Harald (2009). A randomized double-blind controlled trial of intra-annular radiofrequency thermal disc therapy - A 12-month follow-up. Pain.  ISSN 0304-3959.  145(3), s 279- 286 . doi: 10.1016/j.pain.2009.05.001
• Abildgaard, Andreas; Karlsen, Jørn Skaarud; Heiberg, Lise; Bosse, Gerhard & Hol, Per Kristian (2008). Improved visualization of artificial pulmonary nodules with a new subvolume rendering technique. Acta Radiologica.  ISSN 0284-1851.  49, s 761- 768 . doi: 10.1080/02841850802179751
• Kazaryan, Ayrazat M.; Anchikov, Grigori Iu.; Hol, Per Kristian; Fosse, Erik; Edwin, Bjørn & Grachev, Sergei V. (2008). High-intensity focused ultrasound ablation, a new method for the minimally invasive treatment of hepatic tumours. Rossiiskaya Akademiya Meditsinskikh Nauk. Vestnik.  ISSN 0869-6047.  (10), s 63- 68
• Frich, Lars Inge; Hol, Per Kristian; Roy, Sumit; Mala, Tom; Edwin, Bjørn; Clausen, Ole Petter F. & Gladhaug, Ivar Prydz (2006). Experimental hepatic radiofrequency ablation using wet electrodes: electrode-to-vessel distance is a significant predictor for delayed portal vein thrombosis. European Radiology.  ISSN 0938-7994.  16, s 1990- 1999
• Lingaas, Per Snorre; Hol, Per Kristian; Lundblad, Runar; Rein, Kjell Arne; Mathisen, Lars; Smith, Hans Jørgen; Andersen, Rune; Thaulow, Erik; Tønnessen, Tor Inge; Svennevig, Jan; hauge, sigurd nitter; Fredriksen, Per Morten; andersen, marit & Fosse, Erik (2006). Clinical and radiologic outcome of off-pump coronary surgery at 12 months follow-up: prospective randomized trial.. Annals of Thoracic Surgery.  ISSN 0003-4975.
• Lingaas, Per Snorre; Hol, Per Kristian; Lundblad, Runar; Rein, Kjell Arne; Mathisen, Lars; Smith, Hans-Jørgen; Andersen, Rune; Thaulow, Erik; Tønnessen, Tor Inge; Svennevig, Jan Ludvig; hauge, sigurd nitter; Fredriksen, Per Morten; Andersen, Marit Helen & Fosse, Erik (2006). Clinical and Radiological Outcome of Off-Pump Coronary Surgery at 12 Months Follow-Up: A Prospective Randomized Trial. Annals of Thoracic Surgery.  ISSN 0003-4975.  81(6), s 289- 295 . doi: 10.1016/j.athoracsur.2005.12.003
• Lingaas, Per Snorre; Hol, Per Kristian; Lundblad, Runar; Rein, Kjell Arne; Mathisen, Lars; Smith, Hans Jørgen; Andersen, Rune; Thaulow, Erik; Tønnessen, Tor Inge; Svennevig, Jan; hauge, sigurd nitter; Fredriksen, Per Morten; Andersen, Marit Helen & Fosse, Erik (2006). Clinical and radiologic outcome of off-pump coronary surgery at 12 months follow-up: prospective randomized trial.. Annals of Thoracic Surgery.  ISSN 0003-4975.
• Hirschberg, Henry; Samset, Eigil; Hol, Per Kristian; Tillung, Terje & Lote, K (2005). Impact of intraoperative MRI on the surgical results for high-grade gliomas. Minimally Invasive Neurosurgery.  ISSN 0946-7211.  48(2), s 77- 84
• Lund, Christian; Nes, Ragnhild Bang; Ugelstad, Torhild Pynten; Due-Tønnessen, Paulina; Andersen, Rune; Hol, Per Kristian; Rainer, Brucher & Russell, David (2005). Cerebral Emboli during Left Heart Catheterization may cause Acute Brain Injury. European Heart Journal.  ISSN 0195-668X.  26(13), s 1269- 1275
• Lund, Christian; Sundet, Kjetil Søren; Tennøe, Bjørn; Hol, Per Kristian; Rein, Kjell Arne; Fosse, Erik & Russell, David (2005). Cerebral ischemic injury and cognitive impairment after off-pump and on-pump coronary bypass grafting surgery. Annals of Thoracic Surgery.  ISSN 0003-4975.  80, s 2126- 2131
• Mathisen, Lars; Andersen, Marit Helen; Hol, Per Kristian; Tennøe, Bjørn; Lund, Christian; Russell, David; Halvorsen, Steinar; Lundblad, Runar; Wahl, Astrid Klopstad; Hanestad, Berit Rokne & Fosse, Erik (2005). Preoperative cerebral ischemic lesions predict physical health status after on-pump coronary artery bypass surgery. Journal of Thoracic and Cardiovascular Surgery.  ISSN 0022-5223.  130(6), s 1691- 1697 . doi: 10.1016/j.jtcvs.2005.08.008
• Mathisen, Lars; Andersen, Marit; Hol, Per Kristian; Tennøe, Bjørn; Lund, Christian; Russell, David; Lundblad, Runar; Halvorsen, Steinar; Wahl, Astrid; Hanestad, Berit Rokne & Fosse, Erik (2005). Preoperative cerebral ischemic lesions predict physical health status after on-pump coronary artery bypass surgery. Journal of Thoracic and Cardiovascular Surgery.  ISSN 0022-5223.  130(6), s 1691- 1697 Show summary

  doi:10.1016/j.jtcvs.2005.08.008

• Mathisen, Lars; Andersen, MH; Hol, PK; Lingaas, PS; Lundblad, R; Rein, KA; Tønnessen, Tor Inge; Tønnesen, TI; Mørk, BE; Svennevig, JL; Wahl, Astrid; Hanestad, Berit Rokne; Hanestad, Berit Rokne & Fosse, Erik (2005). Patient-reported outcome after randomization to on-pump versus off-pump coronary artery surgery. Annals of Thoracic Surgery.  ISSN 0003-4975.  79(5), s 1584- 1589 Show summary

  doi:10.1016/j.athoracsur.2004.10.019

• Bergsland, Jacob; Hol, Per Kristian; Lingås, Per Snorre; Lundblad, Runar; Rein, Kjell Arne; Andersen, Rune; Mørk, Bjørn Erik; Halvorsen, Steinar; Mujanovic, Emir; Kabil, Emir; Svennevig, Jan Ludvig & Fosse, Erik (2004). Intraoperative and intermediate-term angiographic results of coronary artery bypass surgery with Symmetry proximal anastomotic device. Journal of Thoracic and Cardiovascular Surgery.  ISSN 0022-5223.  128(5), s 718- 724
• Cate, Gerben Ten; Fosse, Erik; Hol, Per Kristian; Samset, Eigil; Bock, Richard W.; McKinsey, James F.; Pearce, Benjamin J & Lothert, Mark (2004). Integrating surgery and radiology in one suite: A multicenter study. Journal of Vascular Surgery.  ISSN 0741-5214.  40(3), s 494- 499
• Hol, Per Kristian; Geiran, Odd; Andersen, Kai; Vatne, Karleif; Offstad, Jon; Svennevig, Jan Ludvig & Fosse, Erik (2004). Improvement of coronary artery fistula surgery by intraoperative imaging. Annals of Thoracic Surgery.  ISSN 0003-4975.  78, s 2193- 2195
• Hol, Per Kristian; Lingaas, Per Snorre; Lundblad, Runar; Rein, Kjell Arne; Vatne, Karleif; Smith, Hans-Jørgen; Nitter-Hauge, Sigurd & Fosse, Erik (2004). Intraoperative Angiography Leads to Graft Revision in Coronary Artery Bypass Surgery. Annals of Thoracic Surgery.  ISSN 0003-4975.  78, s 502- 505
• Lingaas, Per Snorre; Hol, Per Kristian; Lundblad, Runar; Rein, Kjell Arne; Tønnessen, Tor Inge; Svennevig, Jan Ludvig; Nitter-Hauge, Sigurd L; Vatne, Karleif & Fosse, Erik (2004). Clinical and angiographic outcome of coronary surgery with and without cardiopulmonary bypass: A prospective randomized trial. Heart Surgery Forum.  ISSN 1098-3511.  7(1), s E96- E100
• Mala, Tom; Aurdal, Lars; Frich, Lars Inge; Samset, Eigil; Hol, Per Kristian; Edwin, Bjørn; Søreide, Odd & Gladhaug, Ivar Prydz (2004). Liver tumor cryoablation: a commentary on the need of improved procedural monitoring. Technology in Cancer Research and Treatment.  ISSN 1533-0346.  3(1), s 85- 91
• Skulstad, Helge; Andersen, Kai; Edvardsen, Thor; Rein, Kjell Arne; Tønnessen, Tor Inge; Hol, Per Kristian; Fosse, Erik & Ihlen, Halfdan (2004). Detection of ischemia and new insight into left ventricular physiology by strain Doppler and tissue velocity imaging: Assessment during coronary operation of the beating heart. Journal of the American Society of Echocardiography.  ISSN 0894-7317.  17, s 1225- 1233

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• Elle, Ole Jakob; Glette, Kyrre; Høvin, Mats Erling; Hol, Per Kristian & Mathiassen, Kim (2017). A semi-autonomous robotic system for needle tracking and visual servoing using 2D medical ultrasound. Series of dissertations submitted to the Faculty of Mathematics and Natural Sciences, University of Oslo.. 1902.
• Hagen, Gaute; Brønn, Raymond; Hol, Per Kristian; Neple, B.; Lauritzen, Peter Mæhre; Brøgger, Helga Marie; Parimalasingham, Billy Roger; Henriksen, Lars Hagen & Rønsen, Tanja Kristine (2016). Beskrivende radiografer er ikke løsningen :. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  136(12/13), s 1068- 1069 . doi: 10.4045/tidsskr.16.0451
• Murata, Satoru; Niggemann, Pascal; Lee, Edward W. & Hol, Per Kristian (2015). Diagnostic and interventional radiology for liver diseases. BioMed Research International.  ISSN 2314-6133.  2015 . doi: 10.1155/2015/147583
• Skagen, Karolina Ryeng; Evensen, Kristin; Scott, Helge; Krohg-Sørensen, Kirsten; Vatnehol, Svein Are; Hol, Per Kristian; Skjelland, Mona & Russell, David (2015). Carotid plaque lipid content on MRI is associated with plaque instability. Cerebrovascular Diseases.  ISSN 1015-9770.
• Skagen, Karolina Ryeng; Skjelland, Mona; Scott, Helge; Hol, Per Kristian & Russell, David (2015). Assessment of the unstable carotid artery plaque using 3T MRI. International Journal of Stroke.  ISSN 1747-4930.  10, s 1- 458
• Bøen, Erlend; Elvsåshagen, Torbjørn; Westlye, Lars Tjelta; Hummelen, Benjamin; Hol, Per Kristian; Boye, Turid Birgitte; Andersson, Stein; Karterud, Sigmund & Malt, Ulrik Fredrik (2013). Reduced Volume in Stress-Sensitive Hippocampal Subfields in Borderline Personality Disorder. Biological Psychiatry.  ISSN 0006-3223.  73(9), s 200S- 200S
• Elvsåshagen, Torbjørn; Westlye, Lars Tjelta; Bøen, Erlend; Hol, Per Kristian; Andersson, Stein; Boye, Turid Birgitte & Malt, Ulrik Fredrik (2013). Evidence for Depressive Episode-Induced Volume Reduction of the Dentate Gyrus in Bipolar Disorder: A Longitudinal Study. Biological Psychiatry.  ISSN 0006-3223.  73(9), s 188S- 188S
• Skagen, Karolina Ryeng; Skjelland, Mona; Scott, Helge; Hol, Per Kristian & Russell, David (2013). Assessment of the unstable carotid plaque using 3T MRI. Cerebrovascular Diseases.  ISSN 1015-9770.  35, s 48- 48
• Strømmen, Kenneth; Blakstad, Elin Wahl; Moltu, Sissel; Almaas, Astrid; Amlien, Inge; Rønnestad, Arild Erlend; Nakstad, Britt; Drevon, Christian A; Hol, Per Kristian; Veierød, Marit Bragelien; Fjeld, Anders; Valhovd, KB & Iversen, Per Ole (2013). Enhanced Nutrition to very low birth weight infants improves nutrition of cerebral connective tracts.
• Elvsashagen, Torbjørn; Geier, Oliver; Vera, Elsa; Bøen, Erlend; Hol, Per Kristian; Andersson, Stein; Andreassen, Ole Andreas; Josefsen, Dag; Malt, Ulrik Fredrik; Blasco, Maria A & Boye, Birgitte (2012). Associations Between Leukocyte Telomere Length and Hippocampal Indices of Stress and Aging. Biological Psychiatry.  ISSN 0006-3223.  71(8), s 46S- 47S
• Elvsåshagen, Torbjørn; Westlye, Lars Tjelta; Bøen, Erlend; Hol, Per Kristian; Courivaud, Fredric A A; Andersson, Stein; Andreassen, Ole Andreas; Boye, Birgitte & Malt, Ulrik Fredrik (2012). Evidence for Dentate Gyrus Volume Reduction in Bipolar II Disorder and an Age-Related Volume Increase in Healthy Volunteers. Biological Psychiatry.  ISSN 0006-3223.  71(8), s 202S- 202S
• Mathiassen, Kim; Glette, Kyrre Harald; Høvin, Mats Erling; Hol, Per Kristian & Elle, Ole Jakob (2012). Semi-autonomous robotic systems for use in medical diagnostics and treatment.
• Strømmen, Kenneth; Blakstad, Elin Wahl; Moltu, Sissel; Almaas, Astrid; Westerberg, Ane Cecilie; Amlien, Inge; Rønnestad, Arild Erlend; Nakstad, Britt; Drevon, Christian A; Bjørnerud, Atle; Courivaud, Fredric A A; Hol, Per Kristian; Veierød, Marit Bragelien; Fjell, Anders Martin; Walhovd, Kristine B & Iversen, Per Ole (2012). Enhanced Nutrition to Very Low Birth Weight Infants Improves Maturation of Cerebral Connective Tracts.
• Grenne, Bjørnar Leangen; Eek, Christian; Sjøli, Benthe; Dahlslett, Thomas; Hol, Per Kristian; Skulstad, Helge; Smiseth, Otto A.; Edvardsen, Thor & Brunvand, Harald (2010). A simplified 6 segments model of circumferential strain by echocardiography reflects LV infarct size in NSTEMI. European Heart Journal.  ISSN 0195-668X.  31(Supp. 1), s 1069- 1069
• Kvarstein, Gunnvald; Måwe, Leif; Indahl, A; Hol, Per Kristian; Tennøe, Bjørn; Digernes, R; Tønnessen, Tor Inge; Breivik, Harald & Stubhaug, Audun (2010). Placebo control - Still the most ethical study design. Pain.  ISSN 0304-3959.  148(1), s 174- 175 . doi: 10.1016/j.pain.2009.11.013
• Hol, Per Kristian (2007). Integrating coronary angiography into the cardiac operating room. Dissertation for the degree of Dr.Med.. 551.
• Hol, Per Kristian; Lingaas, Per Snorre; Lundblad, Runar; Rein, Kjell Arne; Vatne, Karleif; Andersen, Rune; Smith, Hans-Jørgen; Nitter-Hauge, Sigurd L & Fosse, Erik (2005). Intraoperative quality assessment in coronary artery bypass surgery by angiography.
• Mathisen, Lars; Andersen, Marit Helen; Hol, Per Kristian; Tennøe, Bjørn; Lund, Christian; Russell, David; Lundblad, Runar; Halvorsen, Steinar; Wahl, Astrid Klopstad; Hanestad, Berit Rokne & Fosse, Erik (2005). Pre- and postoperative cerebral lesions as predictors of health status after coronary artery bypass surgery.
• Lund, Christian; Fosse, Erik; Hol, Per Kristian; Lundblad, Runar; Tennøe, Bjørn; Sundet, Kjetil Søren & Russell, David (2004). Cerebral outcome after off-pump compared to on-pump coronary artery.
• Lund, Christian; Fosse, Erik; Hol, Per Kristian; Lundblad, Runar; Tennøe, Bjørn; Sundet, Kjetil Søren & Russell, David (2004). Cerebral outcome after off-pump compared to on-pump coronary artery bypass surgery.
• Lund, Christian; Hol, Per Kristian; Lundblad, Runar; Fosse, Erik; Sundet, Kjetil Søren; Tennoe, B; Brucher, Rainer & Russell, David (2004). Reply. Annals of Thoracic Surgery.  ISSN 0003-4975.  78(4), s 1514- 1515
• Lund, Christian; Russell, David; Nes, Ragnhild B; Ugelstad, Torhild P; Due-Tønnessen, Paulina; Andersen, Rune & Hol, Per Kristian (2004). Cerebral emboli generated during left-heart catheterization may cause acute cerebral morphological, clinical and cognitive impairment.
• Lund, Christian; Hol, Per Kristian; Uglestad, Torhild Pynten; Due-Tønnessen, Paulina; Andersen, Rune; Nes, Ragnhild Bang; Brucher, Rainer & Russell, David (2004). Cerebral emboli during left-heart catheterization may cause acute structural and functional brain impairment. Stroke.  ISSN 0039-2499.  35, s 259- 259

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