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Arenillas M, Gomez de Segura IA.  2018. Anaesthetic effects of alfaxalone administered intraperitoneally alone or combined with dexmedetomidine and fentanyl in the rat. <i>Lab Anim<\/i> 52: 588\u2013598.","DOI":"10.1177\/0023677218764214"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2. Bo\u010dkay A, Agudelo CF, Figurov\u00e1 M, Vargov\u00e1 N, Trbolov\u00e1 A.  2024. Effect of butorphanol medetomidine and butorphanol dexmedetomidine on echocardiographic parameters during propofol anaesthesia in dogs. <i>Animals (Basel)<\/i> 14: 1379.","DOI":"10.3390\/ani14091379"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3. Castillo RL, Ibacache M, Cort\u00ednez I, Carrasco-Pozo C, Far\u00edas JG, Carrasco RA, Vargas-Err\u00e1zuriz P, Ramos D, Benavente R, Torres DH, M\u00e9ndez A.  2020. Dexmedetomidine improves cardiovascular and ventilatory outcomes in critically Ill patients: Basic and clinical approaches. <i>Front Pharmacol<\/i> 10: 1641.","DOI":"10.3389\/fphar.2019.01641"},{"key":"4","doi-asserted-by":"crossref","unstructured":"4. Chandrashekhara SH, Sharma R, Arora R.  2011. Periportal hypodensity on CT: significance and differential diagnosis of an overlooked sign. <i>Clin Res Hepatol Gastroenterol<\/i> 35: 247\u2013253.","DOI":"10.1016\/j.clinre.2010.11.010"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5. Colin PJ, Hannivoort LN, Eleveld DJ, Reyntjens KMEM, Absalom AR, Vereecke HEM, Struys MMRF.  2017. Dexmedetomidine pharmacodynamics in healthy volunteers: 2. Haemodynamic profile. <i>Br J Anaesth<\/i> 119: 211\u2013220.","DOI":"10.1093\/bja\/aex086"},{"key":"6","doi-asserted-by":"crossref","unstructured":"6. Dressel-B\u00f6hm S, Richter H, Kircher PR, Del Chicca F.  2022. Hypoattenuating periportal halo on CT in a patient population can occur in presence of a variety of diseases. <i>PLoS One<\/i> 17: e0260436.","DOI":"10.1371\/journal.pone.0260436"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7. Finck C, Steagall P, Beauchamp G.  2021. Effects of butorphanol with alfaxalone or dexmedetomidine on feline splenic size and appearance on ultrasound and computed tomography. <i>Front Vet Sci<\/i> 8: 572146.","DOI":"10.3389\/fvets.2021.572146"},{"key":"8","unstructured":"8. Glavan C.  2021. CT periportal halo sign in dogs-comparison with human medicine. <i>Lucrari Stiintifice: Seria Medicina Veterinara<\/i> 64: 44\u201348."},{"key":"9","unstructured":"9. Hasiuk MMM, Garcia-Pereira FL, Berry CR, Ellison GW.  2018. Effects of a single intravenous bolus injection of alfaxalone on canine splenic volume as determined by computed tomography. <i>Can J Vet Res<\/i> 82: 203\u2013207."},{"key":"10","doi-asserted-by":"crossref","unstructured":"10. Karcaaltincaba M, Haliloglu M, Akpinar E, Akata D, Ozmen M, Ariyurek M, Akhan O.  2007. Multidetector CT and MRI findings in periportal space pathologies. <i>Eur J Radiol<\/i> 61: 3\u201310.","DOI":"10.1016\/j.ejrad.2006.11.009"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11. Kutara K, Kanda T, Maeta N, Mochizuki Y, Itoh Y, Ono F, Asanuma T.  2020. Effects of sedation by intramuscular administration of medetomidine on canine abdominal vascular system and hepatic parenchyma imaging using enhancement dynamic computed tomography. <i>Vet Sci<\/i> 7: 91.","DOI":"10.3390\/vetsci7030091"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Lawson TL, Thorsen MK, Erickson SJ, Perret RS, Quiroz FA, Foley WD.  1993. Periportal halo: a CT sign of liver disease. <i>Abdom Imaging<\/i> 18: 42\u201346.","DOI":"10.1007\/BF00201700"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Mallick A, Bodenham AR.  2003. Disorders of the lymph circulation: their relevance to anaesthesia and intensive care. <i>Br J Anaesth<\/i> 91: 265\u2013272.","DOI":"10.1093\/bja\/aeg155"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Pupulim LF, Vilgrain V, Ronot M, Becker CD, Breguet R, Terraz S.  2015. Hepatic lymphatics: anatomy and related diseases. <i>Abdom Imaging<\/i> 40: 1997\u20132011.","DOI":"10.1007\/s00261-015-0350-y"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Pypendop BH, Verstegen JP.  1998. Hemodynamic effects of medetomidine in the dog: a dose titration study. <i>Vet Surg<\/i> 27: 612\u2013622.","DOI":"10.1111\/j.1532-950X.1998.tb00539.x"},{"key":"16","doi-asserted-by":"crossref","unstructured":"16. Seitz MA, Lee AM, Woodruff KA, Thompson AC.  2021. Sedation with dexmedetomidine is associated with transient gallbladder wall thickening and peritoneal effusion in some dogs undergoing abdominal ultrasonography. <i>J Vet Intern Med<\/i> 35: 2743\u20132751.","DOI":"10.1111\/jvim.16306"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Singh A, Chandrashekhara SH, Handa N, Baliyan V, Kumar P.  2016. \u201cPeriportal neoplasms\u201d-a CT perspective: review article. <i>Br J Radiol<\/i> 89: 20150756.","DOI":"10.1259\/bjr.20150756"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Tirotta D, Lena C, Muratori P.  2023. Halo sign and inhomogeneity of the liver parenchyma in autoimmune liver disease: What is the prognostic role of periportal alterations in diagnostic imaging (computed tomography, magnetic resonance imaging and contrast-enhanced ultrasound)? 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