Abstract #1217
A comparison of three approaches for defining nucleus pulposus and annulus fibrosus on sagittal MR images.
Yi-Xiang Wang 1 , Greta SP Mok 2 , Duo Zhang 2 , Shu-Zhong Chen 1 , and Jing Yuan 3
1
Dept Imaging and Interventional Radiology,
The Chinese University of Hong Kong, Shatin, NT, Hong
Kong,
2
Department
of Electrical and Computer Engineering, University of
Macau, Macau SAR, Macau,
3
Medical
Physics and Research Department, Hong Kong Sanatorium &
Hospital, Happy Valley, Hong Kong
We compared three region-of-interest (ROI) methods for
nucleus pulposus (NP) and annulus fibrosus (AF).
Fifty-two subjects were imaged under a 3-T MRI and a
total of 256 discs were evaluated using manual and
uniform ROI methods to define NP and AF. The intra-class
correlation coefficient (ICC) values were all >0.75 when
comparing 5-/7-ROI with manual ROI methods for NP, and
0.167-0.488 for AF when comparing 7-ROI with M-ROI
method. The values increased to 0.378-0.582 for 5-ROI
method. Comparable results were obtained with
Bland-Altman plots. The uniform ROI methods agreed well
with manual ROI for NP but not for AF.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Click here for more information on becoming a member.
