Independent Monte-Carlo dose calculation for MLC based CyberKnife radiotherapy.
Independent Monte-Carlo dose calculation for MLC based CyberKnife radiotherapy. Phys Med Biol. 2017 Dec 19;63(1):015015 Authors: Mackeprang PH, Vuong D, Volken W, Henzen D, Schmidhalter D, Malthaner M, Mueller S, Frei D, Stampanoni MFM, Dal Pra A, Aebersold DM, Fix MK, Manser P Abstract This work aims to develop, implement and validate a Monte Carlo (MC)-based independent dose calculation (IDC) framework to perform patient-specific quality assurance (QA) for multi-leaf collimator (MLC)-based CyberKnife® (Accuray Inc., Sunnyvale, CA) treatment plans. The IDC framework uses an XML-format treatment plan as exported from the treatment planning system (TPS) and DICOM format patient CT data, an MC beam model using phase spaces, CyberKnife MLC beam modifier transport using the EGS++ class library, a beam sampling and coordinate transformation engine and dose scoring using DOSXYZnrc. The framework is validated against dose profiles and depth dose curves of single beams with varying field sizes in a water tank in units of cGy/Monitor Unit and against a 2D dose distribution of a full prostate treatment plan measured with Gafchromic EBT3 (Ashland Advanced Materials, Bridgewater, NJ) film in a homogeneous water-equivalent slab phantom. The film measurement is compared to IDC results by gamma analysis using 2% (global)/2 mm criteria. Further, the dose distribution of the clinical treatment plan in the patient CT is compared to TPS calculation by gamma anal...
ConclusionsPA activates PXR signalling and suppresses NF-κB signalling, consequently causing ameliorating inflammation. Results highlight the importance of PXR–NF-κB crosstalk in colitis and suggest a novel therapeutic reagent.Graphical abstract
ConclusionsThis study suggests that PLS exhibits anti-inflammatory action against intestinal damage by reducing inflammatory cell infiltration, oxidative stress, pro-inflammatory action of cytokines, and COX-2 expression in the inflamed colon. PLS shows therapeutic potential against inflammatory disorders like UC.Graphical abstract
ConclusionsThe findings indicate that combined traditional Thai herbal formulations can be used to successfully treat chronic eczema and could be considered as an alternative treatment for refractory chronic eczema.
ConclusionsFrailty assessment may be good value for money. However, limited availability of geriatric consultation services, may hinder implementation. Thus, the estimated benefits of frailty screening may not be achievable in practice.
We report the case of a 17-year-old patient with recurrent hemorrhagic pericardial effusion, who was diagnosed with primary pericardial fibrosarcoma. However, multiple radiological examinations, including CT and [18F] FDG/PET-CT, suggested the presence of fluid and no sign of tumor. Actually, when a patient presents with recurrent hemorrhagic pericardial effusions, pericardial tumors must be taken into account as part of the differential diagnosis.
We present two young patients (
Publication date: Available online 12 October 2019Source: Canadian Journal of CardiologyAuthor(s): Isabelle F. Vonder Muhll
We describe a contiguous gene deletion of the ATM locus in a multi-generation family of Italian descent with a strong family history of pancreatic cancer. A deletion of one copy of the entire ATM gene was identified by routine panel testing and further characterized by chromosomal microarray analysis. An 11q22.3 microdeletion of approximately 960kb was identified that is predicted to result in loss of 10 genes including ATM. The deletion was identified in two additional family members including a presymptomatic daughter and an affected sibling. A normal disomic complement of the 11q22.3 region was detected in a third famil...
Conclusions: The DC-TAV program is an ambitious, civilian-military, nationwide and long-term program, based on a harmonised standard of care and including multidimensional training. Further studies are required to assess its efficacy.
Publication date: Available online 12 October 2019Source: Anaesthesia Critical Care &Pain MedicineAuthor(s): Arnaud Chaumeron, Jeremie Castanie, Louis Philippe Fortier, Patrick Basset, Sophie Bastide, Sandrine Alonso, Jean-Yves Lefrant, Philippe CuvillonABSTRACTBackground: Rapid sequence induction (RSI) is recommended in patients at risk of aspiration, but induced hemodynamic adverse events, including tachycardia. In elderly patients, this trial aimed to assess the impact of the addition of remifentanil during RSI on the occurrence of: tachycardia (primary outcome), hypertension (due to intubation) nor hypotension (rem...