BACKGROUND: Flat-panel volumetric computed tomography (fpVCT) is a new, noninvasive CT imaging modality with increased isotropic resolution. Technical details, potential applications, and our initial experience with a fpVCT prototype scanner in the imaging of osteoporosis in a rat model are presented. METHODS: To date, 21 rats have been investigated in vivo with fpVCT. Pharmacologic effects on bone mineral density (BMD) and structure were of special interest. Image evaluation focussed on the second lumbar vertebra and the left femoral bone. To validate measurement results, BMD values calculated with fpVCT were correlated with results of BMD measurements from ashing of the second lumbar vertebra and femoral bones. RESULTS: Our initial results show that fpVCT is capable of detecting differences in BMD between ovariectomized rats treated with estradiol and a control group with high statistical significance (p<0.05), corresponding to ashing as the gold standard. CONCLUSIONS: In a rat model, fpVCT imaging is especially useful in longitudinal in vivo investigations of BMD measures. Spatial resolution of up to 150 microm allows imaging of the trabecular structure only in human cadaveric bones.
BACKGROUND: Flat-panel volumetric computed tomography (fpVCT) is a new, noninvasive CT imaging modality with increased isotropic resolution. Technical details, potential applications, and our initial experience with a fpVCT prototype scanner in the imaging of osteoporosis in a rat model are presented. METHODS: To date, 21 rats have been investigated in vivo with fpVCT. Pharmacologic effects on bone mineral density (BMD) and structure were of special interest. Image evaluation focussed on the second lumbar vertebra and the left femoral bone. To validate measurement results, BMD values calculated with fpVCT were correlated with results of BMD measurements from ashing of the second lumbar vertebra and femoral bones. RESULTS: Our initial results show that fpVCT is capable of detecting differences in BMD between ovariectomized rats treated with estradiol and a control group with high statistical significance (p<0.05), corresponding to ashing as the gold standard. CONCLUSIONS: In a rat model, fpVCT imaging is especially useful in longitudinal in vivo investigations of BMD measures. Spatial resolution of up to 150 microm allows imaging of the trabecular structure only in human cadaveric bones.
Authors: Meena M Sran; Karim M Khan; Kathy Keiver; Jason B Chew; Heather A McKay; Thomas R Oxland Journal: Eur Spine J Date: 2004-12-23 Impact factor: 3.134
Authors: Konstantin Nikolaou; Thomas Flohr; Karl Stierstorfer; Christoph R Becker; Maximilian F Reiser Journal: Eur Radiol Date: 2004-11-20 Impact factor: 5.315
Authors: H N Rosen; S Tollin; R Balena; V L Middlebrooks; W G Beamer; L R Donohue; C Rosen; A Turner; M Holick; S L Greenspan Journal: Calcif Tissue Int Date: 1995-07 Impact factor: 4.333
Authors: G Seitz; S W Warmann; J Fuchs; H Heitmann; J Mahrt; A-C Busse; P Ruck; R M Hoffman; J T Wessels Journal: Cell Prolif Date: 2008-04 Impact factor: 6.831