Arian is a Radiologist in the Department of Cancer Imaging, where he is also Head of Radiology Research and Co-Head of MRI. Arian has a particular interest in neuro-oncologic MRI, including for the pre-operative molecular classification of adult intracranial gliomas, detection and characterisation of early intracranial metastatic disease, and improving the diagnosis of intracranial post-treatment effects. Arian is regularly invited to speak at major national and international conferences on various neuro-oncology topics, and has more than 50 publications in peer-reviewed journals.   

In 2018, Arian received the prestigious MSD Hubert Stuerzl Memorial Educational Award from the Cooperative Trials Groups for Neuro-Oncology, and in 2019 was awarded a Foundation Discovery Partner Fellowship from the Peter MacCallum Cancer Foundation.