Imrt interplay effect
Witryna28 lut 2014 · interplay effect in the dynamic IMRT delive ry. Thi s model can be clini c ally used to quantify the dosimetric uncertai nty due to the inte rplay effect prior to the treatme nt delivery. 1. WitrynaIntensity modulated radiation therapy (IMRT) is a widely used treatment method that offers increased dose conformity and sparing of the critical organs. This is enabled by a multi-leaf collimator (MLC) that modulates each field during the treatment. When dynamic MLC (DMLC) is used during respiratory motion, dosimetric errors may occur.
Imrt interplay effect
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Witryna6 kwi 2024 · Interplay effects, however, occur only for dynamic treatment techniques such as IMRT, VMAT and IMPT, where there is a simultaneous movement of machine parts (for example the multileaf collimators (MLC)) and the target volume, resulting in hotspots and coldspots in the dose distribution. WitrynaThe authors present a segment-based convolution method to account for the interplay effect between intrafraction organ motion and the multileaf collimator position …
Witryna23 lis 2024 · Several studies further investigate the effects of regular breathing motion and collimator speed on the outcome of MLC treatments (Court et al 2008, 2010 ), showing that non-negligible interplay effects increase with target magnitude, plan complexity and breathing period. WitrynaIMRT, respiratory motion. I. I NTRODUCTION This study investigated the possible interplay effects aris-ing from the treatment of moving targets using the DCAT (dynamic conformal arc therapy) radiotherapy technique. Interplay effects, including dose blurring (also called “dose smoothing” or the “dose gradient effect”) and local-
WitrynaSummary of the interplay effects in IMRT and HT In IMRT, a gross error can result from interplay effects, but the magnitude of the error tends to diminish with increased fractionation, using multiple fields, and randomness of the synchronization between treatment delivery and breathing phases. WitrynaAn earlier concern with breast IMRT is its susceptibility to intrafraction movement during treatment and breast shape changes due to the interplay between MLC and respiratory motion during treatment and the breast shape, respectively. 33 However, it is interesting to note that both an early study by George et al 33 and a separate study by Jain ...
Witryna26 paź 2024 · Seco et al showed that for a sliding widow and step-and-shoot IMRT, up to an 18% dose variation was observed for a single fraction, under similar measurement …
Witryna22 cze 2016 · For lung or abdominal tumors particularly, their respiratory-induced movement can interplay with the dynamic MLC leaf motion of IMRT and VMAT and result in significant hot and cold spots in the tumor. Although the interplay effect might be clinically ignorable , some deviations from the planned dose are inevitable. … greg clark automotiveWitryna21 kwi 2012 · Respiratory motion may lead to dose errors when treating thoracic and abdominal tumours with radiotherapy. The interplay between complex multileaf collimator patterns and patient respiratory motion … greg clark 84 lumberWitrynaReceived 12 December 2005; accepted 19 July 2006 Intrafraction organ motion during the dynamic delivery of intensity-modulated radiation therapy (IMRT) treatment of lung … greg clark football bioWitryna4 lut 2024 · In IMRT, the interplay effect leads to hot and cold spots within the treatment volume, and dose variation up to 18% in a single fraction has been observed . The … greg clark automotive specialistsWitryna1 sty 2004 · Effects on dynamic (IMRT) delivery (interplay effects) In general, there is some variation of the dose at each voxel around the average blurred value. This … greg clark automotive specialists phoenix azWitryna7 maj 2008 · Interplay of scanned particle beams and moving targets has severe impact on the resulting dose distributions and fractionated treatment delivery potentially mitigates at least parts of these interplay effects. Scanned particle beams and target motion interfere. This interplay leads to deterioration of the dose distribution. … greg clarke twitterWitryna21 kwi 2012 · We have developed a treatment reconstruction simulation computer code that accounts for interplay effects by combining multileaf collimator controller log … greg clark football wiki