Invertible Dynamics on Blow-ups of $${\mathbb {P}}^{k}$$

Bedford, Eric

doi:10.1007/978-4-431-55744-9_5

Cited by 2 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dose threshold level was used to avoid comparison in the insignificant low dose regions. Based on the literature [7], results observed in this work and previous experience with IM assurance on a 2D matrix device [19], the 3% mm DTA and dose threshold of 30% were foun appropriate gamma analysis parameters. Figures 11 and 12 show that the dose deviation results for the head and neck plans were well under the 90% pass rate.…”

Section: Discussionmentioning

confidence: 98%

Clinical Implementation of a 3D Dosimeter for Accurate IMRT and VMAT Patient Specific QA

Pham¹,

Luo²

2013

OJBIPHY

View full text Add to dashboard Cite

The Delta4 3D dose verification device was commissioned in the current work for pre-treatment quality assurance (QA) of Intensity Modulated Radiotherapy (IMRT) and Volumetric Modulated Arc Therapy (VMAT) plans. The cross calibration and relative array calibration were performed to enable absolute dose comparison. The linearity of response with dose and temperature sensitivity tests were also conducted to investigate dosimetric properties of the Delta4 device. The need to modify the original CT image of the Delta4 phantom for accurate dose calculation and comparison is addressed in this work, applying a CT extension algorithm. A number of test plans varying from simple 4-field conformal to IMRT and VMAT plans were measured to evaluate the accuracy of this device. It was found that the Delta4 device measured dose accurately to within ±1%. In order to maintain this level of accuracy the machine output fluctuations need to be corrected prior to each measurement and the relative array calibration needs to be performed every six months.

show abstract

Section: Discussionmentioning

confidence: 98%