scholarly journals CT measurement of glenoid erosion in arthritis

1994 ◽  
Vol 76-B (3) ◽  
pp. 384-388 ◽  
Author(s):  
AB Mullaji ◽  
FH Beddow ◽  
GH Lamb
Keyword(s):  
Glenoid Erosion ◽  
Ct Measurement

An experimental study on accuracy and error range of CT measurement

1985 ◽  
Vol 21 (3) ◽  
pp. 368
Author(s):  
J K Han ◽  
K H Chang ◽  
M C Han ◽  
C W Kim
Keyword(s):  
Experimental Study ◽  
Error Range ◽  
Ct Measurement

CT Measurement of Wall Thickness of Early Gastric Cancer: Correlation with Upper GI Series

1995 ◽  
Vol 32 (3) ◽  
pp. 453
Author(s):  
Sung Hoon Chung ◽  
Hyun Sook Kim ◽  
In Oak Ahn ◽  
Goo Lee ◽  
Joon Hee Joh
Keyword(s):  
Gastric Cancer ◽  
Early Gastric Cancer ◽  
Wall Thickness ◽  
Upper Gi ◽  
Upper Gi Series ◽  
Ct Measurement

CT Measurement of Anteversion in the Femoral Neck

1997 ◽  
Vol 38 (4) ◽  
pp. 527-532 ◽  
Author(s):  
Kirstine Lintrup Hermann ◽  
N. Egund
Keyword(s):  
Femoral Neck ◽  
Ct Measurement

Are ultrasonography measurements of optic nerve sheath diameter an alternative to funduscopy in children with syndromic craniosynostosis?

2011 ◽  
Vol 8 (3) ◽  
pp. 329-334 ◽  
Author(s):  
Caroline Driessen ◽  
Natalja Bannink ◽  
Maarten Lequin ◽  
Marie-Lise C. van Veelen ◽  
Nicole C. Naus ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Optic Nerve Sheath Diameter ◽  
Optic Nerve Sheath ◽  
Predictive Values ◽  
Syndromic Craniosynostosis ◽  
Nerve Sheath ◽  
Age Related ◽  
The Mean ◽  
A Prospective Study ◽  
Ct Measurement

Object Children with syndromic or complex craniosynostosis are evaluated for increased intracranial pressure (ICP) using funduscopy to detect papilledema. However, papilledema is a late sign of increased ICP. Because papilledema might be preceded by an increase in optic nerve sheath (ONS) diameter, the authors conducted a prospective study to establish the validity and applicability of measuring the ONS using ultrasonography. Methods From January 2007 to December 2009, 175 bilateral ultrasonography ONS measurements were performed in 128 patients with syndromic or complex craniosynostosis during the daytime. The measurements were correlated with ONS diameter assessed on CT and simultaneous funduscopy, when available. Furthermore, results were compared by using thresholds for ONS diameters on ultrasonography that are available in the literature. Results The mean ONS diameter on ultrasonography was 3.1 ± 0.5 mm. The CT measurement was significantly correlated with the ultrasonography measurement (r = 0.41, p < 0.001). The mean ONS diameter in 38 eyes with papilledema was 3.3 ± 0.5 mm, compared with 3.1 ± 0.5 mm in the eyes of patients without papilledema (p = 0.039). Relative to the age-related thresholds, the ONS diameter was too large in 11 eyes (3%), particularly in patients with Crouzon syndrome. Compared with funduscopy, ultrasonography sensitivity was 11%, specificity was 97%, and positive and negative predictive values were 40% and 86%, respectively. Conclusions Ultrasonography is a valid and easy way of quantifying the ONS. Although the ONS diameter is larger in children with papilledema, it cannot be used as a daytime screening tool instead of funduscopy. The ONS diameter is possibly a more real-time indicator of ICP.

scholarly journals Total versus hemiarthroplasty for glenohumeral arthritis according to preoperative glenoid erosion

2015 ◽  
Vol 7 (2) ◽  
Author(s):  
Marc-Frederic Pastor ◽  
Melena Kaufmann ◽  
Andre Gettmann ◽  
Mathias Wellmann ◽  
Tomas Smith
Keyword(s):  
Pain Relief ◽  
Clinical Outcome ◽  
Internal Rotation ◽  
Constant Score ◽  
Total Shoulder Arthroplasty ◽  
Short Term ◽  
Simple Shoulder Test ◽  
Lower Pain ◽  
Glenoid Erosion

Clinical studies on primary osteoarthritis have shown better results of total shoulder arthroplasty (TSA) compared to hemiarthroplasty (HA) regarding the function, revision rate and postoperative pain relief. However, a clear recommendation for implantation of TSA or HA, depending on the glenoid type of erosion, does not exist. The aim of the study was to compare the results of TSA and HA with respect to the preoperative glenoid type. In this study, 41 patients were examined retrospectively; among them, 25 patients were treated with stemmed anatomic TSA and 16 with stemmed anatomic HA. The degree of osteoarthritis was determined according to Samilson and the glenoid erosion was classified according to Walch. The clinical outcome of the patients was determined by using the Constant Score (CS) and the Simple Shoulder Test at final follow-up. Patients after TSA demonstrated a significantly improved internal rotation compared to HA patients. Patients with preoperative B1 glenoid showed better pain relief after TSA compared to HA. For patients with preoperative type A2 glenoid a significantly higher CS was found after TSA compared to HA. We were able to show good short-term results after TSA and HA. Our findings suggest a better internal rotation for TSA compared to HA, superior clinical outcome for patients with preoperative A2 glenoid and lower pain level for patients with a preoperative B1 glenoid. However, these results need to be confirmed by further studies.

scholarly journals CT image quality influence on different material Edge Response Functions for accurate metrological applications

2021 ◽  
Vol 1193 (1) ◽  
pp. 012064
Author(s):  
I Holgado ◽  
J Iglesias ◽  
N Ortega ◽  
S Plaza ◽  
A Pascual
Keyword(s):  
Image Quality ◽  
Spot Size ◽  
Ct Measurements ◽  
Aluminium Copper ◽  
Measurement Results ◽  
X Ray Computed ◽  
Ct Image Quality ◽  
The Relationship ◽  
Ct Measurement ◽  
Edge Response

Abstract The main objective of the proposed work was to analyse the influence of magnification and focal spot size scan settings on X-ray computed tomography (CT) measurements results under commercial threshold-based algorithms. The relationship between spatial resolution and contrast sensitivity in CT scans of different materials and the accuracy of the resulting CT measurement results is discussed. For that purpose, Aluminium, Copper, Inconel 718 and Titanium disk phantoms were scanned. Preliminary measurements showed that deviations can increase up to 0.48% when the scanning magnification was increased while, for a given magnification, the decrease of a focus size from 1mm to 0.4mm slightly improves the differences up to 0.15%, being negligible at low magnifications. Unsharpness (U T ) and contrast-to-noise ratio (CNR) were calculated for each scanning conditions according to standard ASTM E1695 – 20. A new image quality indicator that includes the combined effect of the U T and CNR was proposed in order to relate measurement error with the image quality. The indicator proves that the influence of CNR is much higher than influence of U T on the CT measurements.

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