Vertebrae at the thoracolumbar junction: A quantitative assessment using CT scans

2021 ◽  
Author(s):  
Anneli Du Plessis ◽  
Albert Van Schoor ◽  
Quenton Wessels ◽  
Patrick Murphy ◽  
Francois Van Schouwenburg ◽  
...  
Keyword(s):  
Quantitative Assessment ◽  
Ct Scans ◽  
Thoracolumbar Junction

scholarly journals The metopic index: an anthropometric index for the quantitative assessment of trigonocephaly from metopic synostosis

2016 ◽  
Vol 18 (3) ◽  
pp. 275-280 ◽  
Author(s):  
Joanna Y. Wang ◽  
Amir H. Dorafshar ◽  
Ann Liu ◽  
Mari L. Groves ◽  
Edward S. Ahn
Keyword(s):  
Quantitative Assessment ◽  
Surgical Repair ◽  
Preoperative Evaluation ◽  
Ct Scans ◽  
Control Group ◽  
3D Reconstructions ◽  
Metopic Synostosis ◽  
The Mean ◽  
Age Range ◽  
Age And Sex

OBJECTIVE Because the metopic suture normally fuses during infancy, there are varying degrees of severity in head shape abnormalities associated with premature fusion. A method for the objective and reproducible assessment of metopic synostosis is needed to guide management, as current methods are limited by their reliance on aesthetic markers. The object of this study was to describe the metopic index (MI), a simple anthropometric cranial measurement. The measurements can be obtained from CT scans and, more importantly, from palpable cranial landmarks, and the index provides a rapid tool for evaluating patients in both pre- and postoperative settings. METHODS High-resolution head CT scans obtained in 69 patients (age range 0–24 months) diagnosed with metopic craniosynostosis were retrospectively reviewed. Preoperative 3D reconstructions were available in 15 cases, and these were compared with 3D reconstructions of 324 CT scans obtained in a control group of 316 infants (age range 0–24 months) who did not have any condition that might affect head size or shape and also in a subset of this group, comprising 112 patients precisely matched to the craniosynostosis patients with respect to age and sex. Postoperative scans were available and reviewed in 9 of the craniosynostosis patients at a mean time of 7.1 months after surgical repair. 3D reconstructions of these scans were matched with controls based upon age and sex. RESULTS The mean preoperative MI for patients with trigonocephaly was 0.48 (SD 0.05), significantly lower than the mean values of 0.57 (SD 0.04) calculated on the basis of all 324 scans obtained in controls (p < 0.001) and 0.58 (SD 0.04) for the subset of 112 age- and sex-matched controls (p < 0.001). For 7 patients with both pre- and postoperative CT scans available for evaluation, the mean postoperative MI was 0.55 (SD 0.03), significantly greater than their preoperative MIs (mean 0.48 [SD 0.04], p = 0.001) and comparable to the mean MI of the controls (p = 0.30). In 4 patients, clinically obtained postoperative MIs by caliper measurement were comparable to measurements derived from CT (p = 0.141). CONCLUSIONS The MI is a useful measurement of the severity of trigonocephaly in patients with metopic synostosis. This simple quantitative assessment can potentially be used in the clinical setting to guide preoperative evaluation, surgical repair, and postoperative degree of correction.

scholarly journals The quantitative assessment of interstitial lung disease with positron emission tomography scanning in systemic sclerosis patients

Rheumatology ◽  
2019 ◽  
Vol 59 (6) ◽  
pp. 1407-1415 ◽  
Author(s):  
Daphne M Peelen ◽  
Ben G J C Zwezerijnen ◽  
Esther J Nossent ◽  
Lilian J Meijboom ◽  
Otto S Hoekstra ◽  
...  
Keyword(s):  
High Resolution ◽  
Interstitial Lung Disease ◽  
Lung Disease ◽  
Fdg Pet ◽  
Quantitative Assessment ◽  
Ct Scanning ◽  
Ct Scans ◽  
Pet Ct ◽  
18F Fdg ◽  
Fdg Pet Ct

Abstract Objectives The reversibility of interstitial lung disease (ILD) in SSc is difficult to assess by current diagnostic modalities and there is clinical need for imaging techniques that allow for treatment stratification and monitoring. 18F-Fluorodeoxyglucose (FDG) PET/CT scanning may be of interest for this purpose by detection of metabolic activity in lung tissue. This study aimed to investigate the potential role of 18F-FDG PET/CT scanning for the quantitative assessment of SSc-related active ILD. Methods 18F-FDG PET/CT scans and high resolution CT scans of eight SSc patients, including five with ILD, were analysed. For comparison, reference groups were included: eight SLE patients and four primary Sjögren’s syndrome (pSS) patients, all without ILD. A total of 22 regions of interest were drawn in each patient at apical, medial and dorsobasal lung levels. 18F-FDG uptake was measured as mean standardized uptake value (SUVmean) in each region of interest. Subsequently, basal/apical (B/A) and medial/apical (M/A) ratios were calculated at patient level (B/A-p and M/A-p) and at tissue level (B/A-t and M/A-t). Results SUVmean values in dorsobasal ROIs and B/A-p ratios were increased in SSc with ILD compared with SSc without ILD (P = 0.04 and P = 0.07, respectively), SLE (P = 0.003 and P = 0.002, respectively) and pSS (P = 0.03 and P = 0.02, respectively). Increased uptake in the dorsobasal lungs and increased B/A-t ratios corresponded to both ground glass and reticulation on high resolution CT. Conclusion Semi-quantitative assessment of 18F-FDG PET/CT is able to distinguish ILD from non-affected lung tissue in SSc, suggesting that it may be used as a new biomarker for SSc-ILD disease activity.

scholarly journals Quantitative assessment of emphysema from whole lung CT scans: comparison with visual grading

2009 ◽  
Author(s):  
Brad M. Keller ◽  
Anthony P. Reeves ◽  
Tatiyana V. Apanosovich ◽  
Jianwei Wang ◽  
David F. Yankelevitz ◽  
...  
Keyword(s):  
Quantitative Assessment ◽  
Ct Scans ◽  
Visual Grading ◽  
Lung Ct

CTV to PTV margins for prostate irradiation. Three-dimensional quantitative assessment of interfraction uncertainties using portal imaging and serial CT scans

2009 ◽  
Vol 11 (9) ◽  
pp. 615-621 ◽  
Author(s):  
Luis A. Pérez-Romasanta ◽  
Eva Lozano-Martín ◽  
Joaquín Velasco-Jiménez ◽  
Fermín Mendicote-León ◽  
Miguel Sanz-Martín ◽  
...  
Keyword(s):  
Quantitative Assessment ◽  
Three Dimensional ◽  
Ct Scans ◽  
Portal Imaging ◽  
Serial Ct

Evaluation of CT Scans and 3-D Reformatted Images for Quantitative Assessment of the Hip

1994 ◽  
Vol 14 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Mark F. Abel ◽  
David H. Sutherland ◽  
Dennis R. Wenger ◽  
Scott J. Mubarak
Keyword(s):  
Quantitative Assessment ◽  
Ct Scans

scholarly journals Quantitative assessment of the vertebral pneumaticity in an anhanguerid pterosaur using micro-CT scanning

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Richard Buchmann ◽  
Borja Holgado ◽  
Gabriela Sobral ◽  
Leonardo dos Santos Avilla ◽  
Taissa Rodrigues
Keyword(s):  
Trabecular Bone ◽  
Quantitative Assessment ◽  
Ct Scanning ◽  
Ct Scans ◽  
Appendicular Skeleton ◽  
Micro Ct ◽  
Neural Arch ◽  
Dorsal Vertebra ◽  
Air Space

AbstractResearch on the postcranial skeletal pneumaticity in pterosaurs is common in the literature, but most studies present only qualitative assessments. When quantitative, they are done on isolated bones. Here, we estimate the Air Space Proportion (ASP) obtained from micro-CT scans of the sequence from the sixth cervical to the fourth dorsal vertebra of an anhanguerine pterosaur to understand how pneumaticity is distributed in these bones. Pneumatisation of the vertebrae varied between 68 and 72% of their total volume. The neural arch showed higher ASP in all vertebrae. Anhanguerine vertebral ASP was generally higher than in sauropod vertebrae but lower than in most extant birds. The ASP observed here is lower than that calculated for the appendicular skeleton of other anhanguerian pterosaurs, indicating the potential existence of variation between axial and appendicular pneumatisation. The results point to a pattern in the distribution of the air space, which shows an increase in the area occupied by the trabecular bone in the craniocaudal direction of the vertebral series and, in each vertebra, an increase of the thickness of the trabeculae in the zygapophyses. This indicates that the distribution of pneumatic diverticula in anhanguerine vertebrae may not be associated with stochastic patterns.

Sign in / Sign up

Export Citation Format

Share Document