Sander, T; Billas, I; Kelly, M; Maughan, D J; Shipley, D R (2024) Changes to the NPL reference air kerma rate primary standard TH100C for high dose rate 192Ir brachytherapy sources. NPL Report. IR 67

Billas, I; Bouchard, H; Oelfke, U; Duane, S (2021) Traceable reference dosimetry in MRI guided radiotherapy using alanine: calibration and magnetic field correction factors of ionisation chambers. Physics in Medicine & Biology, 66 (16). 165006

Bouchard, H; Billas, I; Subiel, A; Duane, S (2021) Eigencolor radiochromic film dosimetry. Medical Physics, 48 (5). pp. 2592-2603. ISSN 0094-2405

de Pooter, J; Billas, I; de Prez, L; Duane, S; Kapsch, R P; Karger, C P; van Asselen, B; Wolthaus, J (2021) Reference dosimetry in MRI-linacs: evaluation of available protocols and data to establish a Code of Practice. Physics in Medicine & Biology, 66 (5). 05TR02 ISSN 0031-9155

Cervantes, Y; Billas, I; Shipley, D; Duane, S; Bouchard, H (2020) Small-cavity chamber dose response in megavoltage photon beams coupled to magnetic fields. Physics in Medicine & Biology, 65 (24). 245008 ISSN 1361-6560

Billas, I; Bouchard, H; Oelfke, U; Shipley, D; Gouldstone, C; Duane, S (2020) Alanine dosimetry in strong magnetic fields: use as a transfer standard in MRI-guided radiotherapy. Physics in Medicine & Biology, 65 (11). 115001 ISSN 1361-6560

Billas, I; Bouchard, H; Oelfke, U; Duane, S (2019) The effect of magnetic field strength on the response of Gafchromic EBT-3 film. Physics in Medicine & Biology, 64 (6). 06NT03 ISSN 1361-6560

Costa, F; Doran, S J; Hanson, I M; Nill, S; Billas, I; Shipley, D; Duane, S; Adamovics, J; Oelfke, U (2018) Investigating the effect of a magnetic field on dose distributions at phantom-air interfaces using PRESAGE® 3D dosimeter and Monte Carlo simulations. Physics in Medicine & Biology, 63 (5). 05NT01 ISSN 1361-6560

Billas, I; Homer, M; Duane, S (2018) Report on dose measurements on the MRI-linac at Liverpool Hospital (Australia) performed by NPL. NPL Report. IR 46

Dimitriadis, A; Patallo, I S; Billas, I; Duane, S; Nisbet, A; Clark, C H (2017) Characterisation of a plastic scintillation detector to be used in a multicentre stereotactic radiosurgery dosimetry audit. Radiation Physics and Chemistry, 140. pp. 373-378.

Costa, F*; Doran, S*; Nill, S*; Duane, S; Shipley, D; Billas, I; Adamovics, J*; Oelfke, U* (2017) Development of a methodology to study the effect of magnetic field on dose distributions in an MR-linac, using PRESAGEreg and Monte Carlo calculations. J. Phys.: Conf. Ser., 847. 012058

Billas, I; Shipley, D; Galer, S; Bass, G; Sander, T; Fenwick, A; Duane, S; Smyth, V (2017) Reply to comment on `Development of a primary standard for absorbed dose from unsealed radionuclide solutions'. Metrologia, 54 (4). pp. 615-616.

Billas, I; Shipley, D; Galer, S; Bass, G; Sander, T; Fenwick, A; Smyth, V (2016) Development of a primary standard for absorbed dose from unsealed radionuclide solutions. Metrologia, 53 (6). pp. 1259-1271.