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Mini Pterional Craniotomy for Clip Ligation of a Large Middle Cerebral Artery Bifurcation Aneurysm by Picket-Fence Technique: 2-Dimensional Operative Video.
Oper Neurosurg (Hagerstown)
January 2025
Neurosurgery Division, East Bay Brain and Spine Medical Group, Walnut Creek, California, USA.
Evaluation of an improved picket fence style test for routine MLC positional QA.
J Appl Clin Med Phys
November 2024
Department of Radiation Oncology, Calvary Mater Hospital Newcastle, Newcastle, New South Wales, Australia.
Purpose: The aim was to develop and evaluate an EPID-based MLC positional test that addresses known weaknesses of the picket fence test and has sufficient accuracy so that the AAPM MPPG 8.b. MLC position action limit of ± 0.
View Article and Find Full Text PDFA Comparative Study of Direct Immunofluorescence Patterns in Linear IgA Bullous Dermatosis Versus Dermatitis Herpetiformis.
Am J Dermatopathol
November 2024
Professor and Department Chair, Department of Dermatology and Dermatologic Surgery, Medical University of South Carolina, Charleston, SC.
Background: Dermatitis herpetiformis (DH) is typically characterized by granular IgA deposition in the papillary dermis on direct immunofluorescence (DIF), and linear IgA bullous dermatosis (LABD) is characterized by linear deposition of IgA along the basement membrane. Other DIF findings in both conditions may include IgG, IgM, and C3 deposition in various patterns. In cases where immunofluorescence findings are unclear, such as continuous but somewhat granular IgA deposition along the dermal-epidermal junction, additional DIF patterns may be helpful in the diagnostic process.
View Article and Find Full Text PDF"Picket fence" an alternative clipping technique for wide necked and large aneurysms: technical nuances in a case series.
J Cerebrovasc Endovasc Neurosurg
November 2024
Vascular Neurosurgery Department, Hospital de Especialidades del Centro Medico Nacional Siglo XXI. Mexico City, Mexico.
Complex aneurysms are a therapeutic challenge in contemporary neurosurgery. Several microsurgical and endovascular techniques have been proposed for their treatment. The picket fence clipping technique uses fenestrated clips, that are stacked not to reconstruct the neck of the aneurysm, but to create a duct to normalize the cerebral flow by reconstructing the dome.
View Article and Find Full Text PDFTechnical Note: Investigating of dosimetric leaf gap and leaf transmission factor variations across gantry and collimator angles in volumetric modulation arc therapy.
J Appl Clin Med Phys
December 2024
Radiation Oncology Department, National Center for Cancer Care and Research, Doha, Qatar.
Article Synopsis
- This study examines how variations in gantry and collimator angles affect dosimetric leaf gap (DLG) and leaf transmission factor (LTF) in a Varian LINAC with rounded-end multi-leaf collimators (MLCs).
- The research involved various measurements using a TrueBeam LINAC and tested multiple angles and beam energies to assess dosimetric impacts through VMAT Picket Fence tests and patient-specific verification.
- Findings revealed significant differences in DLG based on gantry angle, with the highest DLG at 270 degrees and the lowest at 90 degrees, suggesting a need for averaged DLG values for more accurate dose calculations, contrary to current Varian guidelines.
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