PURPOSE To develop and investigate a continuous path optimization methodology to traverse prescribed non-coplanar IMRT beams with variant SADs, by orchestrating the couch and gantry movement with zero-collision, minimal patient motion consequence and machine travel time. METHODS We convert the given collision zone definition and the prescribed beam location/angles to a tumor-centric coordinat...

The purpose of this study is to quantify the discrepancy between optical guidance platform (OGP) frameless localization system (Varian) and Trilogy on-board imaging (OBI) system (Varian) for setting up phantom and stereotactic radiosurgery (SRS) patient; and to determine whether cone-beam CT (CBCT) is necessary for OGP patient setup, and compare CBCT and orthogonal kV-kV in term of their verifi...

Onboard cone-beam CT (CBCT) has been widely used in image guided radiation therapy. However, the longitudinal coverage is only 15.5 cm in the pelvis scan mode. As a result, a single CBCT scan cannot cover the planning target volume in the longitudinal direction for over 80% of the patients. The common approach is to use double- or multiple-circular scans and then combine multiple CBCT volumes a...

On Dec. 17, 2020, I woke up with a tickle in my throat. Later it became cough. took cough syrup. By the weekend, had cold-like symptoms and began taking medicine for cold flu. Monday was nauseated; Pepto-Bismol. lay on couch getting sicker sicker. tried to drink juice or ginger ale but could keep nothing down. canceled Christmas dinner son his family. Day, I'd lost 15 pounds.

The heap is a data strudure used in many applications and provides a funfamental technique to solve many problems efficiently. In this paper I we show that a sequence of n INSERT and EXTRACT..MIN heap operations can be performed in time O(nlogmjlogp) with space Oem) on a random access machine to ,vhich a linear systolic array of p processors is attached, provided that, at any time instance, the...

the objective of this investigation was the development of chitosan/xanthan polyelectrolyte complex based mucoadhesive nasal insert of promethazine hydrochloride a drug used in the treatment of motion sickness. a 32 factorial design was applied for preparing chitosan/xanthan polyelectrolyte complex and to study the effect of independent variables i.e. concentration of xanthan [x1] and concentra...