An inversion method for the cone-beam transform

2006 ◽  
Author(s):  
Can Evren Yarman ◽  
Birsen Yazıcı
Keyword(s):  
Cone Beam ◽  
Inversion Method

scholarly journals The Formula of Grangeat for Tensor Fields of Arbitrary Order innDimensions

2007 ◽  
Vol 2007 ◽  
pp. 1-4 ◽  
Author(s):  
T. Schuster
Keyword(s):  
Radon Transform ◽  
Tensor Field ◽  
Arbitrary Order ◽  
Cone Beam ◽  
Inversion Method ◽  
Tensor Fields ◽  
Arbitrary Tensor

The cone beam transform of a tensor field of orderminn≥2dimensions is considered. We prove that the image of a tensor field under this transform is related to a derivative of then-dimensional Radon transform applied to a projection of the tensor field. Actually the relation we show reduces form=0andn=3to the well-known formula of Grangeat. In that sense, the paper contains a generalization of Grangeat's formula to arbitrary tensor fields in any dimension. We further briefly explain the importance of that formula for the problem of tensor field tomography. Unfortunately, form>0, an inversion method cannot be derived immediately. Thus, we point out the possibility to calculate reconstruction kernels for the cone beam transform using Grangeat's formula.

Cone beam et troisième molaire mandibulaire incluse

2019 ◽  
Vol 53 (1) ◽  
pp. 21-34
Author(s):  
N. Bellaiche ◽  
E. Azoulay
Keyword(s):  
Cone Beam ◽  
Prise De Décision

Les patients, comme les chirurgiens-dentistes, attendent beaucoup de l’orthodontiste pour les guider dans la prédiction d’évolution des dents de sagesse (DDS). L’imagerie est un outil clé pour la prise de décision et l’analyse pré-opératoire. Cet article est une synthèse des découvertes fortuites radiologiques liées à la troisième molaire mandibulaire et montre l’intérêt du CBCT. La pathologie associée à la troisième molaire est plus souvent observée dans le CBCT que dans la panoramique. Plus de troisièmes molaires seraient enlevées si les résultats pathologiques étaient basés sur le CBCT.

Radiologic Aspects of a High-Risk Ethmoid and the Rhinobase in Cone Beam Tomography

Skull Base ◽  
2011 ◽  
Vol 21 (S 01) ◽  
Author(s):  
Christian Gueldner ◽  
Isabell Diogo ◽  
Siegfried Bien ◽  
Afshin Teymoortash ◽  
Jochen Werner
Keyword(s):  
High Risk ◽  
Cone Beam ◽  
Cone Beam Tomography

Value of cone beam computed tomography to evaluate complication of intracranial haemorrhage in endovascular treatment (evt): a case report

2019 ◽  
Vol 1 (1) ◽  
pp. 16-18 ◽  
Author(s):  
Norafida Bahari ◽  
Nik Azuan Nik Ismail ◽  
Jegan Thanabalan ◽  
Ahmad Sobri Muda
Keyword(s):  
Computed Tomography ◽  
Arteriovenous Malformation ◽  
Endovascular Treatment ◽  
Cone Beam Computed Tomography ◽  
Diagnostic Value ◽  
Cone Beam ◽  
Brain Arteriovenous Malformation ◽  
Embolic Materials

In this article, we evaluate the effectiveness of Cone Beam Computed Tomography, through a case study, in assessing the complication of intracranial bleeding during an endovascular treatment of brain arteriovenous malformation when compared to Multislice-Detector Computed Tomography performed immediately after the procedure. The image quality of Cone Beam Computed Tomography has enough diagnostic value in differentiating between haemorrhage, embolic materials and the arteriovenous malformation nidus to facilitate physicians to decide for further management of the patient.

Value of cone beam computed tomography to evaluate complication of intracranial haemorrhage in endovascular treatment (evt): a case report.

2019 ◽  
pp. 16-18
Author(s):  
Norafida Bahari ◽  
NikAzuan Nik Ismail ◽  
Jegan Thanabalan ◽  
Ahmad Sobri Muda
Keyword(s):  
Computed Tomography ◽  
Arteriovenous Malformation ◽  
Endovascular Treatment ◽  
Cone Beam Computed Tomography ◽  
Diagnostic Value ◽  
Cone Beam ◽  
Brain Arteriovenous Malformation ◽  
Embolic Materials

In this article, we evaluate the effectiveness of Cone Beam Computed Tomography, through a case study, in assessing the complication of intracranial bleeding during an endovascular treatment of brain arteriovenous malformation when compared to Multislice-Detector Computed Tomography performed immediately after the procedure. The image quality of Cone Beam Computed Tomography has enough diagnostic value in differentiating between haemorrhage, embolic materials and the arteriovenous malformation nidus to facilitate physicians to decide for further management of the patient.

Formulation, Design and Development of Niosome Based Topical Gel for Skin Cancer

2017 ◽  
Vol 2 (3) ◽  
Keyword(s):  
Skin Cancer ◽  
Drug Release ◽  
Hemorrhagic Cystitis ◽  
The Body ◽  
Cancer Drug ◽  
Inversion Method ◽  
Body Parts ◽  
Basal Cells ◽  
Formulation Design ◽  
Topical Gel

Melanoma is the most dangerous type of skin cancer in which mostly damaged unpaired DNA starts mutating abnormally and staged an unprecedented proliferation of epithelial skin to form a malignant tumor. In epidemics of skin, pigment-forming melanocytes of basal cells start depleting and form uneven black or brown moles. Melanoma can further spread all over the body parts and could become hard to detect. In USA Melanoma kills an estimated 10,130 people annually. This challenge can be succumbed by using the certain anti-cancer drug. In this study design, cyclophosphamide were used as a model drug. But it has own limitation like mild to moderate use may cause severe cytopenia, hemorrhagic cystitis, neutropenia, alopecia and GI disturbance. This is a promising challenge, which is caused due to the increasing in plasma drug concentration above therapeutic level and due to no rate limiting steps involved in formulation design. In this study, we tried to modify drug release up to threefold and extended the release of drug by preparing and designing niosome based topical gel. In the presence of Dichloromethane, Span60 and cholesterol, the initial niosomes were prepared using vacuum evaporator. The optimum percentage drug entrapment efficacy, zeta potential, particle size was found to be 72.16%, 6.19mV, 1.67µm.Prepared niosomes were further characterized using TEM analyzer. The optimum batch of niosomes was selected and incorporated into topical gel preparation. Cold inversion method and Poloxamer -188 and HPMC as core polymers, were used to prepare cyclophosphamide niosome based topical gel. The formula was designed using Design expert 7.0.0 software and Box-Behnken Design model was selected. Almost all the evaluation parameters were studied and reported. The MTT shows good % cell growth inhibition by prepared niosome based gel against of A375 cell line. The drug release was extended up to 20th hours. Further as per ICH Q1A (R2), guideline 6 month stability studies were performed. The results were satisfactory and indicating a good formulation approach design was achieved for Melanoma treatment.

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