Background: This study evaluates an alternative to the classical method of head fixation during Gamma Knife radiosurgery using a Leksell head frame. In the Gamma Knife Icon™ model, a new method of head fixation is used by utilizing a thermal molded polymer mask that takes the shape of the patient's head before fixing the head to the table. However, this mask is for single use and quite expensive.
Methods: We describe a new, very economical method to fix the head of the patient during radiosurgery. We used commercial, quite cheap material [polylactic acid (PLA)] plastic and made a 3D printing model for the patient's face, taking special measurements to put this mask and fix it on the Gamma Knife. The actual material cost is only $4 (100 times less than the original mask cost).
Results: The new mask efficiency was tested using the movement checker software, the same one used to measure the efficiency of the original mask.
Conclusion: The newly designed and manufactured mask is quite effective for use with the Gamma Knife Icon™, with a much lower cost, and it can be manufactured locally.
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http://dx.doi.org/10.25259/SNI_1053_2022 | DOI Listing |
Brachytherapy
January 2025
Department of Genitourinary Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX.
Background: To determine outcomes of MRI-assisted radiosurgery (MARS) for salvage brachytherapy using the radioisotope Pd after various upfront treatments including surgery, external beam radiotherapy, and brachytherapy.
Methods: We retrospectively reviewed data for patients who underwent salvage MARS for intraprostatic lesions or prostate bed recurrences from 2016 to 2022. Biochemical recurrence, prostate cancer-specific, and overall survival, and the cumulative incidences of toxicities, were determined by Kaplan-Meier estimates.
World Neurosurg
January 2025
Department of Neurological Surgery, Columbia University Irving Medical Center, New York, NY, USA, 10032; Department of Radiation Oncology, Columbia University Irving Medical Center, New York, NY, USA, 10032. Electronic address:
Background And Objectives: This article aims to report results of our facial nerve preservation approach to treating vestibular schwannomas (VS) at a single institution by a single surgeon performing both microsurgery (MS) and stereotactic radiosurgery (SRS).
Methods: We retrospectively reviewed 751 patients at our institution between 1998 and 2023 by intervention received: retrosigmoid microsurgery (MS, Group 1, 217 patients), gamma knife stereotactic radiosurgery (SRS, Group 2, 462 patients), MS then SRS (Group 3, 72 patients), SRS then MS (Group 4, 10 patients), and SRS then SRS (Group 5, 5 patients). No patients had MS followed by MS.
Eur J Radiol
December 2024
Great Ormond Street Hospital for Children NHS Foundation Trust, London WC1N 3JH, UK; UCL Great Ormond Street Institute of Child Health, London, UK; Great Ormond Street Hospital NIHR Biomedical Research Centre, London, UK.
J Neurosurg Pediatr
January 2025
1Neurotology Unit, Department of Neurosurgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow; and.
Objective: The objective of this study was to discuss the characteristics of intracranial extension in patients with juvenile nasopharyngeal angiofibroma (JNA) and propose and an algorithm for its management.
Methods: A retrospective chart review of all patients with JNA who underwent operations between January 2013 and January 2023 was done, and those cases with intracranial extension categorized as stage IIIb, IVa, and IVb according to the Andrews modification of the Fisch staging classification were included in the study. Data were collected about age at presentation, symptoms, radiological findings, routes of intracranial extension, therapeutic management, and follow-up.
PLoS One
January 2025
Colorectal Cancer Center, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
This study aimed to identify radiotherapy dosimetric parameters related to local failure (LF)-free survival (LFFS) in patients with lung and liver oligometastases from colorectal cancer treated with stereotactic body radiotherapy (SBRT). We analyzed 75 oligometastatic lesions in 55 patients treated with SBRT between January 2014 and December 2021. There was no constraint or intentional increase in maximum dose.
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