This work analyzes replacing an insert made of ceramic with CBN (Cubic Boron Nitride). The inserts are cutting tools used in machining. We will start by presenting a brief account what machining is, is applicable this research and the properties two tools. also include our objective justification for carrying out project. Next, we describe all equipment process to verify results, detailing func...

Quantification of the setup errors is vital to define appropriate setup margins preventing geographical misses. The no-action-level (NAL) correction protocol reduces the systematic setup errors and, hence, the setup margins. The manual entry of the setup corrections in the record-and-verify software, however, increases the susceptibility of the NAL protocol to human errors. Moreover, the impact...

Aim: The present study is devoted to evaluate the dose at different points defined on the patient using semiconducting diodes and thermoluminescence detectors to excute verification of the dose at these relevant points calculated by means of movement couch and Beam Zones method of the Total Body Irradiation Technique. Material and Method: In this technique; 11 patients using 6 MV X-ray in the (...

A positioning QA procedure for Varian's 2D/2D (kV/MV) and 3D/3D (planCT/CBCT) matching was developed. The procedure was to check: (1) the coincidence of on-board imager (OBI), portal imager (PI), and cone beam CT (CBCT)'s isocenters (digital graticules) to a linac's isocenter (to a pre-specified accuracy); (2) that the positioning difference detected by 2D/2D (kV/MV) and 3D/3D(planCT/CBCT) matc...

Leterrier’s recent blockbuster, Clash of the Titans (2010), tells the story of the most famous adventures of Perseus, son of Zeus and the mortal Danaë, as he defeats the Gorgon Medusa before rescuing Andromeda, daughter of king Cepheus, from the gigantic sea monster. The basic details of these mythical adventures can be found in ancient sources. Furthermore, the film pays an immediate tribute t...

The purpose of this study is to identify regions of spinal column in which more than three contiguous vertebrae can be reliably and quickly aligned within 1 mm using a 6-degree (6D) couch and full body immobilization device. We analyzed 45 cases treated over a 3-month period. Each case was aligned using ExacTrac x-ray positioning system with integrated 6D couch to be within 1° and 1 mm in all s...

The purpose of this study was to survey current departmental policies on treatment couch overrides and the values of table tolerances used clinically. A 25-question electronic survey on couch overrides and tolerances was sent to full members of the American Association of Physicists in Medicine (AAPM). The first part of the survey asked participants if table overrides were allowed at their inst...