Lorenzo Placidi obtained MSc degree in nuclear and subnuclear physics at the University of Roma “La Sapienza” in 2010. He completed his medical physicist training program between Fondazione Policlinico Universitario “A. Gemelli” IRCCS of Rome (Italy) and Paul Scherrer Institute (PSI) Proton Therapy Center (Switzerland). He was appointed as a clinical medical physicist in 2015 at PSI, focusing on proton dosimetry and adaptive treatment. In 2017 has been appointed as senior medical physicists at Fondazione Policlinico Universitario “A. Gemelli” IRCCS of Rome where is actually the head of the MRI-Linac medical physics group. In 2022 he defended her PhD thesis on the clinical implementation of the dosiomics at Università Cattolica del Sacro Cuore of Rome.

The activities and responsibilities he has developed over time are: team Coordination, Radiotherapy treatment planning with external beams using 3D conformal, intensity modulated IMRT and VMAT and stereotactic techniques using the following TPS: Eclipse and Raystation. Commissioning of Linear Accelerators (Varian), proton therapy systems (Varian) and MRI-LINAC (Viewray, Meridian). Implementation of new technologies (IGRT, SGRT, in vivo dosimetry). Dosimetric and quality controls in radiotherapy. His research interests include MRI guided radiotherapy, MR quantitative imaging, radiomics, dosomics, particles therapy, automation of radiotherapy process including artificial intelligence, radiotherapy treatment plan quality and in-vivo dosimetry. He is leading the medical physics MRI guided radiotherapy research and technologies innovation program at Fondazione Policlinico Universitario “A. Gemelli” IRCCS of Rome.

He is an active member of the European SocieTy for Radiotherapy & Oncology (ESTRO). In particular, he is involved in the European Particle Therapy Group (EPTN), supporting new research and development in the dosimetry and imaging subgroup. He is also a member of the ESTRO working group on leadership in Medical Physics and member of the ESTRO Guidelines Sub-group on Physics. He is chairing the “Next generation MR-guided radiotherapy: AI application for planning and image guidance” group, born from the ESTRO Physics Workshop 2022.

He is also an active member of the Italian Association for Medical Physics (AIFM): he especially supports the AI&BigData, FutuRuS and SBRT working group.

He also has been a member of scientific committees for national and international scientific meetings (ESTRO, AIFM, EFOMP).

Since January 2023, he serves as associate editor Physica Medica, European Journal of Medical Physics.

Since 2022, he is a lecturer of the Master’s Course Advanced Skills for TSRM Specialist in Radiation Oncology, at the Catholic University of the Sacred Heart in Rome.

Since 2022, he has been awarded the National Scientific Qualification (Second level).