2024 Hippocampus sparing contouring

Hippocampus sparing contouring

Author: yjzv

August undefined, 2024

Webb9 jan. 2024 · The left hippocampus sparing was higher with IMRT. Compared to VMAT, the dose to the hippocampi, amygdalae and temporal lobes was significantly decreased in the IMRT plans. Conclusions: Dosimetric comparison of WV-RT/TB in IGCT suggests PBS-PT's advantage over photons in conformality and NOAR sparing, whereas IMRT's … Webb15 nov. 2010 · Purpose: Sparing the hippocampus during cranial irradiation poses important technical challenges with respect to contouring and treatment planning. Herein we report our preliminary experience with whole-brain radiotherapy using hippocampal sparing for patients with brain metastases.

Hippocampal Contouring: A Contouring Atlas for RTOG 0933

Webb1 apr. 2024 · Hippocampal avoidance (HA) using intensity-modulated radiotherapy during whole-brain radiotherapy (WBRT) is hypothesized to preserve cognition. Methods: The primary end point was time to cognitive function failure, defined as decline using the reliable change index on at least one of the cognitive tests. Webb16 juni 2014 · In “sparing” plans for the hemispheric HGG cases, it was possible to reduce the mean physical dose to the contralateral hippocampus planning-at-risk volume by … different types of kookaburras

Automated contouring and planning pipeline for …

WebbSparing the hippocampus during cranial irradiation poses important technical challenges with respect to contouring and treatment planning. Herein we report our preliminary … Webb14 feb. 2024 · Hippocampal contouring and HA-WBRT planning directives have been previously described, 11, 13 with bilateral hippocampal contours manually generated on the fused thin-slice magnetic resonance imaging (MRI)-computed tomography image set and expanded by 5 mm to generate the HA region. Webbby the curvilinear T1-hypointense hippocampal tail located just antero-medially to the atrium of the lateral ventricle (G). Contours terminated at the lateral edges of the quadrageminal cisterns (H), before the emergence of the crus of the fornix. clustered neural stem cells. We propose that hippocampal spar- WBRT. different types of knowledge philosophy

Hippocampal-Sparing WBRT PDF Radiation Therapy Hippocampus …

Hippocampus sparing contouring

Why and how to spare the hippocampus during brain …

Webb30 dec. 2024 · To streamline workflow, we evaluated MRI-atlas based auto-contouring of the hippocampus generated in Elements Treatment Planning System (TPS) compared … Webb12 aug. 2024 · The NVALT11 trial investigated PCI without hippocampal sparing in patients with non–small-cell lung cancer and showed a higher percentage of physician-rated neurocognitive impairment in the PCI arm compared with the observation arm. 9 On the other hand, the multicenter randomized phase III HA-PCI trial did not support a …

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Webb31 mars 2024 · Sparing of the hippocampus was evaluated considering the mean dose, the D98% and D2%, as well as the equivalent dose in 2 Gy fractions (EQD2) with an … Webb30 okt. 2024 · The hippocampal contours were generated automatically (except for minor manual edits in 1% of cases); although not timed here, these contours are typically …

Webb20 feb. 2024 · We hypothesized that hippocampal-sparing radiotherapy via volumetric modulated arc therapy (VMAT) could preserve the neurocognitive function (NCF) of patients with primary brain tumors treated with radiotherapy. We reviewed data from patients with primary brain tumors who underwent hippocampal-sparing brain … WebbThe most problematic area of hippocampal contouring is the posterior horn of the lateral ventricle. Training in the manual contouring of the hippocampus during HS-BRT treatment planning under...

WebbWe explain how to contour the hippocampus on axial T1 echo sequence magnetic resonance images with intravenous gadolinium. Results: Step 2: Contour inferiorly … WebbRed: Hippocampus MR Images courtesy of: Holmes CJ, Hoge R, Collins L, et al. "Enhancement of MR Images Using Registration for Signal Averaging" Journal of Computer Assisted Tomography 22, 324-333 (1998) 11 Continue contouring in a cephalad (superior) direction, medial to the temporal horn of the lateral ventricle and …

Webb1 sep. 2024 · Forty-two clinical cases were contoured according to guidelines. A new dosimetric scorecard was created as an objective measure for plan quality. The new Hippocampal Sparing Whole Brain Version 2 (HSWBv2) model adopted a complex recursive training process and was validated with five additional cases.

Webb8 juni 2024 · Patients between 18 and 80 years old are recruited, with at least 4 brain metastases of solid tumors and at least one, but not exceeding 10 metastases ≥5 mm. … formlabs tank cleaningWebb16 juni 2014 · In “sparing” plans for the hemispheric HGG cases, it was possible to reduce the mean physical dose to the contralateral hippocampus planning-at-risk volume by 56.8% compared to standard treatment plan prepared without prospective sparing of the hippocampus (15.8 Gy vs. 36.6 Gy). formlabs tank expiredWebbHippocampal contouring was performed according to the Radiation Therapy Oncology Group (RTOG) 0933 protocol and the work of Chera et al. on axial images, sequentially … different types of koiWebb29 apr. 2024 · Hippocampal avoidance regions were manually generated by 3D expansion of the hippocampal contours by 5 mm. 18 Per protocol, maximum dose to the hippocampus itself should not exceed 16 Gy. However, maximum dose ≤17 Gy was deemed variation acceptable. formlabs tank lifetimeWebb16 maj 2024 · In particular, in cranial radiotherapy the contouring accuracy is a key factor in sparing organs at risk especially in hippocampus sparing, because of both anatomical complexity of this structure and clinical implications related to hippocampal injury. formlabs tech supportWebb14 aug. 2014 · Red: Hippocampus Amygdala Uncus As contouring proceeds postero-cranially, the anterior boundary of the hippocampus is defined by the anterior edge of … formlabs teamWebb18 feb. 2024 · In dual-arc conventional volumetric modulated arc therapy (dac-VMAT), the large irradiation field for whole brain planned target volume (PTV) requires a wide jaw opening in which substantial low dose volume to the hippocampus may be produced due to suboptimal multi-leaf collimator (MLC) movements. formlabs test print butterfly