This new study showed the high performance of this diamond detector in small photon beams, in comparison with various commercially available passive and active dosimeters.

Concerning the output factor measurements, a good agreement (better than 1.1%) was observed between this carbon material detector and two types of passive dosimeters (LiF microcubes and EBT2 radiochromic films) for all beam sizes except the smallest field of 0.6 × 0.6 cm$^2$ with a deviation of 2.6%. A dose rate independence of this diamond detector (better than 0.5% over a wide range of dose rates available on a stereotactic dedicated facility) was obtained due to the electrode geometry. The optimal dosimeter derived from this work presented small diamond dimensions of approximately 1 × 1 × 0.15 mm$^3$, with diamond-like-carbon electrodes covering the whole diamond surface. Furthermore, electrodes covering the whole diamond surface were essential for a dose rate independence of the diamond detector. Use features like bookmarks, note taking and highlighting while reading The Diamond Dimensions: A Minecraft Based Novel: Volume 1: Exploration. Download it once and read it on your Kindle device, PC, phones or tablets. Length to width ratio describes the proportions of a diamondwhether its. The Diamond Dimensions: A Minecraft Based Novel: Volume 1: Exploration - Kindle edition by Hamer, Harvey. This study highlighted that reducing diamond dimensions is crucial for small beam output factor measurements and to limit the influence of its high density. A 1-carat asscher-cut diamond is 5.5 mm across, while a 1-carat round-cut. To give better insights to these open questions, we have used both computational method and experimental analysis. The current study focuses on geometrical parameters of diamond detector, namely, the diamond dimensions and the electrode geometry, in order to solve the dosimetric issues still observed in small photon beams with diamond detectors.

However, diamond exhibits a density 3.51 times greater than that of water and recent studies using Monte Carlo simulations have demonstrated the drawback of a high-density detector on small beam output factors. Diamond detectors have been presented in the literature as an attractive candidate for this application, due to their small detection volume and the diamond atomic number (Z = 6) which is close to water effective atomic number (Zeff ∼ 7.42). A diamond’s diameter is measured from one point of the girdle to. Length measurements such as table size, pavilion depth and crown height are measured in relative to a diamond’s overall diameter. Abstract : Recent use of very small photon beams (down to 4 mm) in stereotactic radiotherapy requires new detectors to accurately determine the delivered dose. Diamond proportions refer to specific parameters within a diamond such as the angles to which it is cut and the exact length of different facets.

Diamond dimensions 1