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Accuracy of volume measurement using 3D ultrasound and development of CT‐3D US image fusion algorithm for prostate cancer radiotherapy
Author(s) -
Baek Jihye,
Huh Jangyoung,
Kim Myungsoo,
Hyun An So,
Oh Yoonjin,
Kim DongYoung,
Chung Kwangzoo,
Cho Sungho,
Lee Rena
Publication year - 2013
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.4767753
Subject(s) - image fusion , 3d ultrasound , imaging phantom , nuclear medicine , radiation therapy , ultrasound , radiation treatment planning , volume (thermodynamics) , medicine , fusion , computer science , computer vision , artificial intelligence , radiology , image (mathematics) , physics , linguistics , philosophy , quantum mechanics
Purpose: To evaluate the accuracy of measuring volumes using three‐dimensional ultrasound (3D US), and to verify the feasibility of the replacement of CT‐MR fusion images with CT‐3D US in radiotherapy treatment planning.Methods: Phantoms, consisting of water, contrast agent, and agarose, were manufactured. The volume was measured using 3D US, CT, and MR devices. A CT‐3D US and MR‐3D US image fusion software was developed using the Insight Toolkit library in order to acquire three‐dimensional fusion images. The quality of the image fusion was evaluated using metric value and fusion images.Results: Volume measurement, using 3D US, shows a 2.8 ± 1.5% error, 4.4 ± 3.0% error for CT, and 3.1 ± 2.0% error for MR. The results imply that volume measurement using the 3D US devices has a similar accuracy level to that of CT and MR. Three‐dimensional image fusion of CT‐3D US and MR‐3D US was successfully performed using phantom images. Moreover, MR‐3D US image fusion was performed using human bladder images.Conclusions: 3D US could be used in the volume measurement of human bladders and prostates. CT‐3D US image fusion could be used in monitoring the target position in each fraction of external beam radiation therapy. Moreover, the feasibility of replacing the CT‐MR image fusion to the CT‐3D US in radiotherapy treatment planning was verified.