1. The osteoarthritis initiative (OAI) magnetic resonance imaging quality assurance methods and results 
E. Schneider, Ph.D., M. NessAiver, Ph.D., D. White, Ph.D., D. Purdy, Ph.D., L. Martin, B.S., R.T.R. (M.R.), L. Fanella, R.T.R. (M.R.), D. Davis, B.S., R.T.R. (M.R.), M. Vignone, R.T.R. (M.R.), G. Wu, R.T.R. (M.R.), R. Gullapalli, Ph.D. 
Osteoarthritis and Cartilage 
Volume 16, Issue 9, Pages (September 2008)
DOI: /j.joca
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1
Custom OAI QA phantom for knee coil. Side (A) and top (B) view photographs. Sagittal (C) and axial (D) IW TSE images of the phantom.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
Example of longitudinal variation in ACR (A) and OAI (B) phantom length (Site A).
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

4. Fig. 3
Example of longitudinal variation in ACR (A) and OAI (B) phantom diameter (Site B).
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

5. Fig. 4
Central MR system measurement results for individual ACR phantoms. The axial inner diameter (A) nominal value is 190.0mm. The sagittal inner length (B) nominal value is 148.0mm.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

6. Fig. 5
Example of longitudinal variation in OAI phantom spherical volume (Site B).
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

7. Fig. 6
Example of outer compartment T2 values for OAI phantom (Site D). The OAI phantom was dropped and replaced in August 2004.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions