BJR Received: 26 July 2016 © 2016 The Authors. Published by the British Institute of Radiology Revised: 15 September 2016 Accepted: 10 October 2016 Cite this article as: Palmer AL, Pearson M, Whittard P, McHugh KE, Eaton DJ. Current status of kilovoltage (kV) radiotherapy in the UK: installed equipment, clinical workload, physics quality control and radiation dosimetry.

Br J Radiol 2016; 89: 20160641.

Ratio (TMR) using BJR Supplement 25 data for flattened and flattening filter free (FFF) beams. PDD and TMR scans for a variety of field sizes were measured in water using a Sun Nuclear Corporation 3D SCANNERTM on a Varian TrueBeam linear accelerator in 6 MV, 10 MV and 6 MV FFF beams. The BJR Supplement 25 data was used to. Android 1. Order As TISP4SxxxyzBJR-S. Absolute Maximum Ratings, TA = 25 °C (Unless Otherwise Noted).

For the first time, all three Summer novels are in one collection, including The Summer I Turned Pretty, It’s Not Summer Without You and We’ll Always Have Summer The Summer I Turned Pretty (Book #1) This book starts off clean and cute. We meet our main character Belly (Isabel), 15 as she’s arriving at the beach house she stays at every summer on Cousin’s Beach with her brother, Steven. We meet Conrad and Jeremiah, the two boys Belly and Steven have grown up with. The intro to this was really perfect because we weren’t just thrown into the beach house, we are introduced to Steven and Belly’s sibling relationship on the way to Cousin’s.

• 317 Downloads • Abstract This study assessed the validity of the conversion from percentage depth dose (PDD) to tissue maximum ratio (TMR) using BJR Supplement 25 data for flattened and flattening filter free (FFF) beams. PDD and TMR scans for a variety of field sizes were measured in water using a Sun Nuclear Corporation 3D SCANNER™ on a Varian TrueBeam linear accelerator in 6 MV, 10 MV and 6 MV FFF beams.

The BJR Supplement 25 data was used to convert the measured PDDs to TMRs and these were compared with the directly measured TMR data. The TMR plots calculated from PDD were within 1% for the 10 MV and 6 MV flattened beams, for field sizes 3 cm × 3 cm to 40 cm × 40 cm inclusive, at depths measured beyond the depth of maximum dose. The disagreement between the measured and calculated TMR plots for the 6 MV FFF beam increased with depth and field size to a maximum of 1.7% for a 40 cm × 40 cm field. The results found in this study indicate that the BJR Supplement 25 data should not be used for field sizes larger than 20 cm × 20 cm at depths greater than 15 cm for the 6 MV FFF beam. It is advised that PDD to TMR conversion for FFF beams should be done with phantom scatter ratios appropriate to FFF beams, or the TMR should be directly measured if required.