https://novaprd-lb.newcastle.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:53776 Wed 28 Feb 2024 15:31:09 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:34498 ref). Dosimetric endpoints were based on dose-volume histograms calculated from the CT_ref and the pCTs for various volumes of interest and on 3-dimensional gamma analyses. The PBM uncertainties were compared with those of the ABM and BDM. Results: The mean absolute error and mean error obtained from the PBM were 41.1 and –1.1 Hounsfield units. The PBM dose-volume histogram differences were 0.7% for prostate planning target volume V_95%, 0.5% for rectum V_70Gy, and 0.2% for bladder V_50Gy. Compared with ABM and BDM, PBM provided significantly lower dose uncertainties for the prostate planning target volume (70-78 Gy), the rectum (8.5-29 Gy, 40-48 Gy, and 61-73 Gy), and the bladder (12-78 Gy). The PBM mean gamma pass rate (99.5%) was significantly higher than that of ABM (94.9%) or BDM (96.1%). Conclusions: The proposed PBM provides low uncertainties with dose planned on CTref. These uncertainties were smaller than those of ABM and BDM and are unlikely to be clinically significant.]]> Wed 23 Feb 2022 16:03:06 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:52863 Mon 30 Oct 2023 10:01:55 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:46578 2-weighted MRIs were acquired in addition to planning CTs. The pCTs were generated from the MRIs using 7 configurations: 4 GANs (L2, single-scale PL, multiscale PL, weighted multiscale PL), 2 U-Net (L2 and single-scale PL), and the PBM. The imaging endpoints were mean absolute error and mean error, in Hounsfield units, between the reference CT (CT_ref) and the pCT. Dose uncertainties were quantified as mean absolute differences between the dose volume histograms (DVHs) calculated from the CT_ref and pCT obtained by each method. Three-dimensional gamma indexes were analyzed. Results: Considering the image uncertainties in the whole pelvis, GAN L2 and U-Net L2 showed the lowest mean absolute error (≤34.4 Hounsfield units). The mean errors were not different than 0 (P ≤ .05). The PBM provided the highest uncertainties. Very few DVH points differed when comparing GAN L2 or U-Net L2 DVHs and CT_ref DVHs (P ≤ .05). Their dose uncertainties were ≤0.6% for the prostate planning target Volume V_95%, ≤0.5% for the rectum V_70Gy, and ≤0.1% for the bladder V_50Gy. The PBM, U-Net PL, and GAN PL presented the highest systematic dose uncertainties. The gamma pass rates were >99% for all DLMs. The mean calculation time to generate 1 pCT was 15 s for the DLMs and 62 min for the PBM. Conclusions: Generating pCT for MRI dose planning with DLMs and PBM provided low-dose uncertainties. In particular, the GAN L2 and U-Net L2 provided the lowest dose uncertainties together with a low computation time]]> Mon 28 Nov 2022 16:01:26 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:38715 Mon 20 Nov 2023 15:50:10 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:55076 Mon 08 Apr 2024 14:17:28 AEST ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:46392 Fri 25 Nov 2022 13:59:19 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:42286 Fri 17 Nov 2023 11:23:06 AEDT ]]> https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:32135 Fri 04 May 2018 15:36:57 AEST ]]>