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P Borianne

Publications and source records attributed to P Borianne.

6 recordsLinked to original sources
PubMed2003

[Semi-automatic measurements of hepatic lobes. Application to study of liver volumes. Analysis of 50 computed tomography of normal liver].

OBJECTIVE: Healthy and pathological hepatic volumetry can be of great interest in Liver pathology and treatment. We studied the hepatic segmentation in order to verify if it is possible to estimate the volume of one lobe, when the volume of the other lobe or the total liver is known. PATIENTS AND METHODS: We studied 50 normal hepatic angiotomographies. For each exam and using the Couinaud classification, we measured the total hepatic volume, the right lobe, the left lobe and the caudate lobe volumes. We used a software called "Hepato" developed in order to quantify automatically CTScan images of the liver. We performed a linear regression analysis (least squares method) and calculated the determination coefficient to study the correlation between the different volumes. RESULTS: The mean total hepatic volume was 1497 cm3. We obtained for the right lobe 1231 cm3, 226 cm3 for left lobe, and 39 cm3 for the caudate lobe. Moreover there was a weak correlation between these volumes. CONCLUSION: Exact volume estimation of an hepatic lobe in one patient can not be obtained from the total hepatic volume. However, theses volumes can only be measured from three-dimensional images. Since classical image editing tools are time request, it becomes impossible to utilize them in a clinical routine to get the different volumes of the Liver. Thus, a software dedicated for liver parenchyma recognition is necessary.

Adult↗
PubMed2000

[3D cephalometry].

The Cepha3DT software is used to generate a 3D model of the human face.

Cephalometry↗
PubMed1999

[The architectural balance of the face: a 3D cephalometric concept].

The use of the c2000 software led us to develop a new 3D cephalometric construction, based on the selection on the axial CT Scans of 8 anatomical landmarks and of teeth, all of which were situated along the trigeminal neuro matriciel facial growth axes. The analysis of this construction is based on the use of an original mathematical tool in biology: the axes of inertia. Using the selection of both mental foramen, both infra and supra orbital foramen and the head of both malleus, the C 2000 software creates a geometrical construction called: "the maxillo-facial frame", as well as, a 3D cephalometric analysis: angles, distances, areas, volumes center of gravity and axes of inertia. Using the selection of teeth, the C 2000 software calculates the axes of inertia of each tooth or of groups of teeth. The use of the axes of inertia allow us to create of a hierarchy of anatomical levels the teeth, the half arches, the arches, both arches and the maxillo-facial frame. In addition, for each of these anatomical levels, the axes of inertia create a 3D landmark which allows the calculation of the orientation of each of these elements in relation to the others. The study of 28 orthomorphic people using this analysis revealed the existence of a maxillo-facial balance that is unique for each individual.

Adolescent↗
PubMed1997

[A new 3-dimensional cephalometry model. A new 3-dimensional parameter analysis: the axis of inertia. A new idea: maxillofacial equilibrium].

The authors propose a biomensurativ 3 D method based on the plotting of 8 anatomical landmarks situated on the trigeminal axis and the selection of teeth. In the analysis of this construction, we have employed mathematical tools unusual in developmental biology, the axis of inertia. The 3 D analysis allows to evidence the architectural, structural and functional balance of the dentomaxillofacial complex. This balance must be substituted to the normality concept to directly linked to cultural criterias and to the selection of mean parameters among culturally and ethnically homogeneous populations. Therapy does not have to lead to the normality of mean parameters but to the return or to the discovery of a real balance.

Cephalometry↗
PubMedDate not supplied

[Application of three-dimensional computer graphics in oncology].

Accurate 3D tumoral volume evaluation is now possible through the combined use and progress of computer graphics technics (3D reconstruction and visualization) and medical imagery (helicoidal TDM scanner). Specific organ and pathology oriented softwares can help answer rapidly to problems posed by oncologic praticians. A new decision support for diagnosis, therapy and follow-up is emerging. First results in liver tumors and hepatic regeneration macroscopic biometrics are presented. Tumoral or organ volumic index will be usable in the follow-up. TNM staging, external conformal radiotherapy for prostatic or brain tumors, drugs cytolytic effects evaluation will take great advantage of these technologies. 3D visualization and matching CT and MRI imagery can help computed assisted surgery.

Computer Graphics↗