First published online
April 15, 2008, 10.2967/jnumed.107.046987
Long-Term Precision of 18F-Fluoride PET Skeletal Kinetic Studies in the Assessment of Bone Metabolism
Michelle L. Frost1,
Glen M. Blake1,
So-Jin Park-Holohan2,
Gary J.R. Cook3,
Kathleen M. Curran4,
Paul K. Marsden5 and
Ignac Fogelman1
1 King's College London, Osteoporosis Screening and Research Unit, Guy's Hospital, London, United Kingdom; 2 Molecular Medicine Section, National Heart and Lung Institute, Imperial College, London, United Kingdom; 3 Department of Nuclear Medicine, Royal Marsden Hospital, London, United Kingdom; 4 School of Medicine and Medical Sciences, University College Dublin, Dublin, Ireland; and 5 King's College London, PET Imaging Centre, St. Thomas' Hospital, London, United Kingdom

View larger version (35K):
[in this window]
[in a new window]
|
FIGURE 1. 18F-Fluoride PET images of lumbar vertebra showing ROI around vertebral body: transaxial view (image zoomed in inset) (A), sagittal view (B), and coronal view (C).
|
|

View larger version (4K):
[in this window]
[in a new window]
|
FIGURE 2. Three-compartmental 4k bone kinetic model described by Hawkins et al. (7) to analyze 18F-fluoride PET bone studies. See text for description of rate constants. RBC = red blood cells; ECF = extracellular fluid.
|
|

View larger version (9K):
[in this window]
[in a new window]
|
FIGURE 3. Representative study showing image-derived arterial plasma input function (continuous line) and vertebral ROI time–activity curve ( ). Vertebral values have been multiplied by 4 for easier comparison with input function. Decay corrections have been applied.
|
|

View larger version (8K):
[in this window]
[in a new window]
|
FIGURE 4. Representative Patlak plot. Ki-PAT is equal to slope of normalized tissue activity against normalized time derived using linear regression.
|
|

View larger version (5K):
[in this window]
[in a new window]
|
FIGURE 5. Box plot showing differences in repeated measurements for Ki-4k, Ki-3k, and Ki-PAT (A) and for SUVmean (B). Boxes represent values between 25th and 75th percentiles, horizontal bars inside boxes indicate median, vertical bars above and below boxes represent 10th and 90th percentiles, outliers greater than 1.5x interquartile range are presented by circles, and extreme values greater than 3x interquartile range are indicated by asterisk.
|
|
Copyright © 2008 by the Society of Nuclear Medicine.