scholarly journals Deficits in Bone Geometry in Growth Hormone-Deficient Prepubertal Boys Revealed by High-Resolution Peripheral Quantitative Computed Tomography

2019 ◽  
Vol 92 (5) ◽  
pp. 293-301
Author(s):  
Tamar G. Baer ◽  
Sanchita Agarwal ◽  
Shaoxuan Chen ◽  
Codruta Chiuzan ◽  
Aviva B. Sopher ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Growth Hormone ◽  
High Resolution ◽  
Quantitative Computed Tomography ◽  
Bone Geometry ◽  
Peripheral Quantitative Computed Tomography ◽  
Prepubertal Boys

High resolution peripheral quantitative computed tomography (HR-pQCT) und die klinische Relevanz der Resultate

2013 ◽  
Vol 22 (01) ◽  
pp. 13-17
Author(s):  
J. M. Patsch ◽  
R. Kocijan ◽  
H. Resch ◽  
J. Haschka
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Quantitative Computed Tomography ◽  
Peripheral Quantitative Computed Tomography ◽  
Klinische Relevanz

ZusammenfassungKnochenstabilität ist durch Knochenvolumen und Mikroarchitektur des Knochens determiniert. Mittels HR-pQCT (high resolution peripheral quantitative computed tomography) steht eine nicht invasive Methode zur Verfügung, um die Mikroarchitektur des Knochens darzustellen. Die Resultate aus zahlreichen Studien geben Rückschlüsse auf unterschiedliche Strukturalterationen im Rahmen von Erkrankungen, die mit einem erhöhten Frakturrisiko einhergehen. Die Knochendichtemessung mittels DXA spiegelt das Frakturrisiko oft nicht adäquat wider. Umso entscheidender ist es, Risikofaktoren in der Wahl der Therapie zu berücksichtigen. Die klinische Relevanz der Resultate aus HR-pQCT-Messungen besteht derzeit dahingehend, dass wertvolle Informationen über Veränderungen der Mikroarchitektur auf Forschungsebene erhoben werden.

scholarly journals Reliability and Change in Erosion Measurements by High-Resolution peripheral Quantitative Computed Tomography in a Longitudinal Dataset of Rheumatoid Arthritis Patients

2020 ◽  
pp. jrheum.191391 ◽  
Author(s):  
Stephanie Finzel ◽  
Sarah L. Manske ◽  
Cheryl Barnabe ◽  
Andrew J. Burghardt ◽  
Hubert Marotte ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Computed Tomography ◽  
High Resolution ◽  
Intraclass Correlation ◽  
Quantitative Computed Tomography ◽  
Correlation Coefficients ◽  
Peripheral Quantitative Computed Tomography ◽  
Good Reliability ◽  
Change Over Time ◽  
Over Time

Objective The aim of this multi-reader exercise was to assess the reliability and change over time of erosion measurements in rheumatoid arthritis (RA) patients using high-resolution peripheral quantitative computed tomography (HR-pQCT). Methods HR-pQCT scans of 23 patients with RA were assessed at baseline and 12 months. Four experienced readers examined the dorsal, palmar, radial, and ulnar surfaces of the metacarpal head (MH) and phalangeal base (PB) of the 2nd and 3rd digits, blinded to time order. In total, 368 surfaces (23 patients x16 surfaces) were evaluated per time point to characterize cortical breaks as pathological (erosion) or physiological, and to quantify erosion width and depth. Reliability was evaluated by intraclass correlation coefficients (ICC), percentage agreement, and Light’s kappa; change over time was defined by means ± SD of erosion numbers and dimensions. Results ICCs for the mean measurements of width and depth of the pathological breaks ranged between 0.819 - 0.883, and 0.771 - 0.907 respectively. Most physiological cortical breaks were found at the palmar PB, whereas most pathological cortical breaks were located at the radial MH. There was a significant increase in both the numbers and the dimensions of erosions between baseline and follow-up (p=0.0001 for erosion numbers, width, and depth in axial plane, and p=0.001 for depth in perpendicular plane). Conclusion This exercise confirmed good reliability of HR-pQCT erosion measurements and their ability to detect change over time.

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