1. A longitudinal study of the quantitative evaluation of patella cartilage after total knee replacement by delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) and T2 mapping at 3.0T: preliminary results 
N. Kumahashi, T. Tadenuma, S. Kuwata, E. Fukuba, Y. Uchio 
Osteoarthritis and Cartilage 
Volume 21, Issue 1, Pages (January 2013)
DOI: /j.joca
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1
The skyline view pre-operatively and 1 year after TKA in the NR group. (a), (d) Wiberg type I; (b), (e) Wiberg type II; (c), (f) Wiberg type III. Yellow lines show the patella facet angle. The patella facet angle decreased as the Wiberg type increased.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
dGEMRIC (A) and T2 mapping (B) before (a, c) and 1 year after TKA (b, d) in the NR group. Patella was divided into eight areas and eight ROIs were applied from Z1s to Z4d before and 1 year after TKA. “Zs” and “Zd” means zone superficial and zone deep, respectively. Outer zone refers to Z1 and Z2 and inner zone refers to Z3 and Z4, respectively. We defined each zone as follows: Z1: outer lateral half zone, Z2: outer medial half zone, Z3: inner lateral half zone and Z4: inner medial half zone. The scale of T1 and T2 relaxation time is also shown. On the maps and color scales in dGEMRIC, blue represents areas of low T1 and red represents area of high T1. On the maps and color scales in T2, blue represents areas of low T2 and red represents area of high T2. The ROIs were demarcated as described in the Methods section. The images shown are from a 70-year-old man with osteoarthritis of the right knee. The color mapping in dGEMRIC changed post-operatively in the inner lateral half superficial zone (Z3s, arrow, b) and the outer lateral and medial superficial zones (Z1s and Z2s, arrow, b). The color mapping in T2 did not change post-operatively.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions