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Evaluation of motion measurement using cine MRI for image guided stereotactic body radiotherapy on a new phantom platform.

Publication ,  Journal Article
Chang, Z; Cai, J; Wang, Z; Yin, F-F
Published in: J Radiosurg SBRT
2011

The objective of this study is to investigate accuracy of motion tracking of cine magnetic resonance imaging (MRI) for image-guided stereotactic body radiotherapy. A phantom platform was developed in this work to fulfill the goal. The motion phantom consisted of a platform, a solid thread, a motor and a control system that can simulate motion in various modes. To validate its reproducibility, the phantom platform was setup three times and imaged with fluoroscopy using an electronic portal imaging device (EPID) for the same motion profile. After the validation test, the phantom platform was evaluated using cine MRI at 2.5 frames/second on a 1.5T GE scanner using five different artificial profiles and five patient profiles. The above profiles were again measured with EPID fluoroscopy and used as references. Discrepancies between measured profiles from cine MRI and EPID were quantified using root-mean-square (RMS) and standard deviation (SD). Pearson's product moment correlational analysis was used to test correlation. The standard deviation for the reproducibility test was 0.28 mm. The discrepancies (RMS) between all profiles measured by cine MRI and EPID fluoroscopy ranged from 0.30 to 0.49 mm for artificial profiles and ranged from 0.75 to 0.91 mm for five patient profiles. The cine MRI sequence could precisely track phantom motion and the proposed motion phantom was feasible to evaluate cine MRI accuracy.

Duke Scholars

Published In

J Radiosurg SBRT

ISSN

2156-4639

Publication Date

2011

Volume

1

Issue

2

Start / End Page

109 / 115

Location

United States
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Chang, Z., Cai, J., Wang, Z., & Yin, F.-F. (2011). Evaluation of motion measurement using cine MRI for image guided stereotactic body radiotherapy on a new phantom platform. J Radiosurg SBRT, 1(2), 109–115.
Chang, Zheng, Jing Cai, Ziheng Wang, and Fang-Fang Yin. “Evaluation of motion measurement using cine MRI for image guided stereotactic body radiotherapy on a new phantom platform.J Radiosurg SBRT 1, no. 2 (2011): 109–15.

Published In

J Radiosurg SBRT

ISSN

2156-4639

Publication Date

2011

Volume

1

Issue

2

Start / End Page

109 / 115

Location

United States