NDLI: Portal image registration using the phase correlation method

Content Provider	IEEE Xplore Digital Library
Author	Gerganov, G. Papucharov, A. Kawrakow, I. Mitev, K.
Copyright Year	2013
Description	Author affiliation: Sofia Univ., Sofia, Bulgaria (Gerganov, G.; Mitev, K.) \|\| Specialized Hosp. for Active Treatment in Oncology, Sofia, Bulgaria (Papucharov, A.) \|\| ViewRay Inc., Cleveland, OH, USA (Kawrakow, I.)
Abstract	The precise patient positioning is a very important step in radiotherapy. The positioning of the patient for treatment with a LINAC is usually performed by aligning a radiograph to a reference image and the obtained alignment parameters are used to move the patient to the required position. To automate the positioning process, a fast and accurate image registration technique is usually required. In this work we investigate the performance of the phase correlation method (PCM) as a registration tool for Electronic Portal Imaging Device (EPID) images. We propose the usage of the PCM method for fast and accurate rigid registration of misaligned EPID images. To illustrate the concept, EPID images are obtained on a Siemens PRIMUS Linear Accelerator by irradiating two different phantoms - a standardised contrast and spatial resolution phantom (”Las Vegas“ phantom) and a realistic phantom of a human pelvis area. Each of the phantoms is placed at the patient table and several images at different table positions are acquired. The position of the table at each image acquisition provides information about the true displacements between the obtained images with a millimeter-level precision. In order to evaluate the accuracy of the PCM registration, the obtained translational parameters using the method are compared with the true displacements known from the table positions. The obtained results show that the method provides very accurate shift estimation with a millimeter-level precision. The method can find potential applications in the calibration and quality assurance procedures of this type of linear accelerator systems. The authors anticipate that the PCM can find application for patient positioning not only by registration of EPID images, but with images from other projection-based imaging modalities as well.
Starting Page	1
Ending Page	3
File Size	341352
Page Count	3
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829306
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase change materials Imaging phantoms Phantoms Correlation Portals Pelvis Image registration positioning phase correlation method
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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