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Fast regional readout CMOS Image Sensor for dynamic MLC tracking

Zin, H, Harris, E, Osmond, J and Evans, P (2014) Fast regional readout CMOS Image Sensor for dynamic MLC tracking Journal of Physics: Conference Series, 489 (1).

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Abstract

Advanced radiotherapy techniques such as volumetric modulated arc therapy (VMAT) require verification of the complex beam delivery including tracking of multileaf collimators (MLC) and monitoring the dose rate. This work explores the feasibility of a prototype Complementary metal-oxide semiconductor Image Sensor (CIS) for tracking these complex treatments by utilising fast, region of interest (ROI) read out functionality. An automatic edge tracking algorithm was used to locate the MLC leaves edges moving at various speeds (from a moving triangle field shape) and imaged with various sensor frame rates. The CIS demonstrates successful edge detection of the dynamic MLC motion within accuracy of 1.0 mm. This demonstrates the feasibility of the sensor to verify treatment delivery involving dynamic MLC up to ∼400 frames per second (equivalent to the linac pulse rate), which is superior to any current techniques such as using electronic portal imaging devices (EPID). CIS provides the basis to an essential real-time verification tool, useful in accessing accurate delivery of complex high energy radiation to the tumour and ultimately to achieve better cure rates for cancer patients. © Published under licence by IOP Publishing Ltd.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Vision Speech and Signal Processing
Authors :
AuthorsEmailORCID
Zin, HUNSPECIFIEDUNSPECIFIED
Harris, EUNSPECIFIEDUNSPECIFIED
Osmond, JUNSPECIFIEDUNSPECIFIED
Evans, PUNSPECIFIEDUNSPECIFIED
Date : 2014
Identification Number : 10.1088/1742-6596/489/1/012085
Additional Information : Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Depositing User : Symplectic Elements
Date Deposited : 11 Feb 2015 10:46
Last Modified : 11 Feb 2015 10:46
URI: http://epubs.surrey.ac.uk/id/eprint/806905

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