The Usefulness of Dual-Volume Visualization (Three-Dimensional Digital Subtraction Angiography and Cross-Sectional Imaging) for Surgical Planning in Treating Intracranial Meningiomas: A Case Series and Technical Report

ABSTRACT Despite many years of dedicated research into the etiopathogenesis of adolescent idiopathic scoliosis, there is still no single distinct cause for this puzzling condition. In this overview, we attempt to link knowledge on the complex three-dimensional pathoanatomy of AIS, based on our ongoing research in this field, with etiopathogenic questions. Evidence from multiple recent cross-sectional imaging studies is provided that supports the hypothesis that AIS has an intrinsic biomechanical basis: an imbalance between the biomechanical loading of the upright human spine due to its unique sagittal configuration on the one hand, and the body’s compensating mechanisms on the other. The question that remains in the etiology of AIS, and the focus of our ongoing research, is to determine what causes or induces this imbalance.

Download Full-text

Three-Dimensional Finite-Element Modeling for Asphalt Concrete Using Visual Cross-Sectional Imaging and Indirect Element Meshing Based on Discrete-Element Models

Journal of Materials in Civil Engineering ◽

10.1061/(asce)mt.1943-5533.0001704 ◽

2017 ◽

Vol 29 (1) ◽

pp. 04016182 ◽

Cited By ~ 11

Author(s):

Xu Yang ◽

Zhanping You ◽

Jing Hu

Keyword(s):

Finite Element ◽

Finite Element Modeling ◽

Asphalt Concrete ◽

Three Dimensional ◽

Discrete Element ◽

Cross Sectional ◽

Dimensional Finite Element ◽

Cross Sectional Imaging ◽

Sectional Imaging ◽

Three Dimensional Finite Element

Download Full-text

Radiology of acute mastoiditis and its complications: a pictorial review and interpretation checklist

The Journal of Laryngology & Otology ◽

10.1017/s0022215119001609 ◽

2019 ◽

Vol 133 (10) ◽

pp. 856-861

Author(s):

M W Mather ◽

P D Yates ◽

J Powell ◽

I Zammit-Maempel

Keyword(s):

Head And Neck ◽

Surgical Planning ◽

Systematic Approach ◽

Acute Mastoiditis ◽

Cross Sectional ◽

Imaging Technology ◽

Radiological Features ◽

Pictorial Review ◽

Cross Sectional Imaging ◽

Sectional Imaging

AbstractBackgroundMastoiditis is an otological emergency, and cross-sectional imaging has a role in the diagnosis of complications and surgical planning. Advances in imaging technology are becoming increasingly sophisticated and, by the same token, the ability to accurately interpret findings is essential.MethodsThis paper reviews common and rare complications of mastoiditis using case-led examples. A radiologist-derived systematic checklist is proposed, to assist the ENT surgeon with interpreting cross-sectional imaging in emergency mastoiditis cases when the opinion of a head and neck radiologist may be difficult to obtain.ResultsA 16-point checklist (the ‘mastoid 16’) was used on a case-led basis to review the radiological features of both common and rare complications of mastoiditis; this is complemented with imaging examples.ConclusionAcute mastoiditis has a range of serious complications that may be amenable to treatment, once diagnosed using appropriate imaging. The proposed checklist provides a systematic approach to identifying complications of mastoiditis.

Download Full-text

Direct cross-sectional imaging using X-ray Compton scattering: application to commercial batteries

Journal of Synchrotron Radiation ◽

10.1107/s1600577521005932 ◽

2021 ◽

Vol 28 (4) ◽

Author(s):

Naruki Tsuji ◽

Kentaro Kajiwara ◽

Masayoshi Itou ◽

Yoshiharu Sakurai

Keyword(s):

Compton Scattering ◽

Three Dimensional ◽

Regions Of Interest ◽

Cross Sectional ◽

X Ray ◽

Dimensional Image ◽

Sample Rotation ◽

Direct Cross ◽

Cross Sectional Imaging ◽

Sectional Imaging

A synchrotron-based technique using Compton scattering imaging is presented. This technique has been applied to a coin battery (CR2023), and the cross-sectional image has been obtained in 34 ms without sample rotation. A three-dimensional image of the whole structure has been reconstructed from 74 cross-sectional images taken consecutively by scanning the incident, wide X-ray beam along one direction. This work demonstrates that quick cross-sectional imaging of regions of interest and three-dimensional image reconstruction without sample rotation are feasible using Compton scattering imaging.

Download Full-text

Radiography and ultrasound of the equine neck

UK-Vet Equine ◽

10.12968/ukve.2021.5.4.142 ◽

2021 ◽

Vol 5 (4) ◽

pp. 142-149

Author(s):

Jonathon J Dixon ◽

Lucy Meehan

Keyword(s):

Computed Tomography ◽

Soft Tissue ◽

Ultrasound Examination ◽

Imaging Modality ◽

Three Dimensional ◽

Cross Sectional ◽

Articular Process ◽

Planar Images ◽

Cross Sectional Imaging ◽

Sectional Imaging

Diagnostic imaging of the equine neck is undertaken for a wide variety of conditions. In many cases, radiography is the principal imaging modality, often complemented by ultrasound examination. Common conditions encountered include osteoarthritis, articular process joint osteochondral fragmentation, cervical vertebral malformation (‘wobbler’), fractures and numerous soft tissue lesions. The complex three-dimensional anatomy of the region limits interpretation of planar images and, in some cases, cross-sectional imaging (such as computed tomography) may be required. However, careful use of radiography and ultrasound can help clinicians to achieve a diagnosis in many cases, often from combining conventional and lesion-orientated projections with a thorough clinical examination.

Download Full-text

Angiography

ESC CardioMed ◽

10.1093/med/9780198784906.003.0110 ◽

2018 ◽

pp. 528-531

Author(s):

Jan Bogaert

Keyword(s):

Digital Subtraction Angiography ◽

Vessel Wall ◽

Duplex Ultrasound ◽

Vascular Imaging ◽

Digital Subtraction ◽

Cross Sectional ◽

Non Invasive ◽

Vessel Imaging ◽

Vessel Stenosis ◽

Cross Sectional Imaging

Digital subtraction angiography is the accepted reference for vascular imaging and grading of vessel stenosis. This test, however, is invasive, and uses nephrotoxic agents and ionizing radiation, making it a poor choice for first-line diagnosis of vascular disease. Duplex ultrasound is a widely used, non-invasive modality to perform vascular imaging, but this technique is operator dependent and has a high percentage of failed exams usually as a result of an inadequate acoustic window or patient habitus. Computed tomography angiography features non-invasive, cross-sectional imaging of the entire arterial and venous vasculature from head to toe, but this modality suffers similar limitations as digital subtraction angiography, and vessel wall calcifications may influence image analysis and rendering. Cardiovascular magnetic resonance (CMR) angiography has emerged as an excellent non-invasive angiographic substitute to digital subtraction angiography. Over the past three decades a series of CMR angiography approaches have been developed to pass the different hurdles inherently linked to vessel imaging. As such, dedicated CMR angiography sequences are nowadays available to study accurately the arterial and venous vessels in all parts of the human body. CMR angiography is either a standalone or can be part of a more comprehensive CMR approach including vessel wall imaging, quantitative flow imaging, and perfusion imaging of the end-organ. The aim of this chapter is to provide the reader with a comprehensive review of how CMR angiography is performed in clinical practice and how well this technique competes with other vascular imaging modalities.

Download Full-text

Fingerprint sign in Vogt-Koyanagi-Harada disease: a case series

International Journal of Retina and Vitreous ◽

10.1186/s40942-021-00356-y ◽

2022 ◽

Vol 8 (1) ◽

Author(s):

Ruy Felippe Brito Gonçalves Missaka ◽

Mauro Goldbaum ◽

Cleide Guimarães Machado ◽

Emmett T. Cunningham ◽

Fernanda Maria Silveira Souto ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Case Series ◽

Plexiform Layer ◽

Fiber Layer ◽

Cross Sectional ◽

En Face ◽

Cross Sectional Imaging ◽

Sectional Imaging ◽

Oct Imaging ◽

Active Inflammation

Abstract Background The tomographic finding, which has been called the "fingerprint sign" in en face reconstructions, seems to be the result of a variety of processes that cause distension of the outer plexiform layer (OPL) and the Henle fiber layer (HFL). The aim of this paper is to describe the appearance of concentric rings at the OPL/HFL interface visualized using en face reconstructions of cross-sectional optical coherence tomography images of patients with Vogt-Koyanagi-Harada disease. Methods Retrospective analysis of images of six eyes of three patients obtained by cross-sectional OCT imaging and en face reconstruction at the level of the OPL/HFL interface. Results All eyes presented with a dentate or saw-tooth pattern of the OPL/HFL interface on cross-sectional OCT with corresponding concentric rings on en face OCT reconstruction, consistent with the recently published “fingerprint sign”. Initial OPL/HFL interface changes were observed between the first and fourth months after treatment and resolution of VKHD associated serous retinal detachments. These OPL/HFL interface changes have persisted for many years following the resolution of the active inflammation. Conclusions Changes in the OPL/HFL interface can be identified following successful treatment of VKHD. These included both a dentate or saw-tooth pattern on cross-sectional imaging and concentric rings or the “fingerprint sign” on en face reconstructions. These changes persisted for many years despite disease quiescence.

Download Full-text