For most computed tomography (CT) simulators, radiation therapists must remove the flat couch top to perform daily CT quality assurance (QA), and then use separate tools to perform localization-laser QA. This process wastes time and effort and creates the opportunity for accidents to occur. In this study, we tested a simple yet comprehensive daily QA program and phantom that we designed for CT ...

The treatment couch and some of the positioning devices of patients receiving radiotherapy treatment are made of a material (carbon) which has low attenuation properties for the photon energies used in the radiotherapy. Previous investigations showed the suitability of carbon fiber tabletops in radiotherapy and their very low attenuation properties for a range of X-ray energies and field sizes ...

We propose a new dependency parsing scheme which jointly parses a sentence and repairs grammatical errors by extending the non-directional transitionbased formalism of Goldberg and Elhadad (2010) with three additional actions: SUBSTITUTE, DELETE, INSERT. Because these actions may cause an infinite loop in derivation, we also introduce simple constraints that ensure the parser termination. We ev...

In traditional psychoanalysis, patients recline on a couch in a way that prevents patients and analysts from seeing each other’s faces. This has been argued to have significant effects, both positive and negative, on patients’ treatment. The use of the couch creates an unusual communicative situation in which both parties are physically but not visually copresent. This study examines the conten...

Noncoplanar radiation fields from a linear accelerator can be used to deliver radiation dose distributions that are superior to those delivered using coplanar radiation fields. Noncoplanar radiation field arrangements are especially valuable when delivering stereotactic body radiation therapy (SBRT). Noncoplanar radiation fields, however, are geometrically more challenging to deliver than copla...

This study utilizes process control techniques to identify action limits for TomoTherapy couch positioning quality assurance tests. A test was introduced to monitor accuracy of the applied couch offset detection in the TomoTherapy Hi-Art treatment system using the TQA "Step-Wedge Helical" module and MVCT detector. Individual X-charts, process capability (cp), probability (P), and acceptability ...

A largely herbarium-based study was undertaken to reassess the status of Elymus athericus (Link) Kerguélen (Sea Couch) and three coastal hybrids E. x drucei (Stace) Stace, laxus (Fr.) Melderis & D.C. McClint. obtusiusculus (Lange) in Scotland. None previous records could be confirmed for country. Verified are detailed listed each relevant vice-county.

In proton therapy, robotic couch was used for patient positioning to achieve high precision in cancer treatment. However, no studies have focused on the real-time motion management system (MMS) couch. This study develop MMS and verify its feasibility. A set up with a couch, an NDI Vega optical tracking system, Special Measurement Tool (SMT) developed software. Leica laser tracker adopted accura...