3D Morphology Analysis of TMJ Articular Eminence in Magnetic Resonance Imaging

Falcão, Izabella Nascimento; Alonso, Maria Beatriz Carrazzone Cal; Silva, Lucas Hian da; Lopes, Sérgio Lúcio Pereira de Castro; Comar, Lívia Pichi; Costa, André Luiz Ferreira

doi:10.1155/2017/5130241

Cited by 9 publications

(2 citation statements)

References 29 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yet, many doctors have to resort to rudimentary linear measurements of the objects in the 2D scans. Among the currently used metrics for TMJ examinations are the horizontal condylar angle (HCA), sagittal ramus angle (SRA), medial joint space (MJS), lateral joint space (LJS), superior joint space (SJS), anterior joint space (AJS), and the width/depth of mandibular fossa (FW, FD) 20 . Being selected by the eye and being based on imprecise reference points, these metrics can only depict the 2D representation of the 3D pattern.…”

Section: Deep Negative Volume Segmentationmentioning

confidence: 99%

Deep negative volume segmentation

Belikova

Rogov

Rybakov

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Clinical examination of three-dimensional image data of compound anatomical objects, such as complex joints, remains a tedious process, demanding the time and the expertise of physicians. For instance, automation of the segmentation task of the TMJ (temporomandibular joint) has been hindered by its compound three-dimensional shape, multiple overlaid textures, an abundance of surrounding irregularities in the skull, and a virtually omnidirectional range of the jaw’s motion—all of which extend the manual annotation process to more than an hour per patient. To address the challenge, we invent a new workflow for the 3D segmentation task: namely, we propose to segment empty spaces between all the tissues surrounding the object—the so-called negative volume segmentation. Our approach is an end-to-end pipeline that comprises a V-Net for bone segmentation, a 3D volume construction by inflation of the reconstructed bone head in all directions along the normal vector to its mesh faces. Eventually confined within the skull bones, the inflated surface occupies the entire “negative” space in the joint, effectively providing a geometrical/topological metric of the joint’s health. We validate the idea on the CT scans in a 50-patient dataset, annotated by experts in maxillofacial medicine, quantitatively compare the asymmetry given the left and the right negative volumes, and automate the entire framework for clinical adoption.

show abstract

Section: Deep Negative Volume Segmentationmentioning

confidence: 99%

Deep negative volume segmentation

Belikova

Rogov

Rybakov

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Currently, available imaging software allows 3-D anatomical reconstruction of the tumor and adjacent structures, based on 3-D rendering software and anatomical modeling and spatial information of the target structure [ 7 , 8 ]. Volumetric anatomical modeling of deeply located tumors can help to determine the surgical approach and parameters to be used to ensure a safer treatment and decrease the chances of tumor recurrence [ 9 – 11 ].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Volume Imaging to Increase the Accuracy of Surgical Management in a Case of Recurrent Chordoma of the Clivus

et al. 2018

View full text Add to dashboard Cite

Patient: Male, 53Final Diagnosis: Clivus chordomaSymptoms: Pain the eyeMedication: —Clinical Procedure: —Specialty: RadiologyObjective:Rare diseaseBackground:The clivus is a depression in the anterior occipital bone of the skull base, posterior to the dorsum sellae, at the junction with the sphenoid bone. Chordoma is a rare tumor arising from embryonic remnants of the notochord and can be locally aggressive with a tendency to recur. The optimal management of this rare tumor remains controversial. A report of a case of recurrent chordoma of the clivus is presented to illustrate the value of volumetric three-dimensional (3-D) reconstruction with computed tomography (CT) and magnetic resonance imaging (MRI) to determine optimal surgical management.Case Report:A 53-year-old man presented with pain in the right orbital cavity, right proptosis, swelling of the right cheek, and bilateral loss of vision. He also had adrenal insufficiency. CT and contrast-enhanced (gadolinium) T1-weighted MRI with multiplanar acquisition were performed with volumetric 3-D reconstruction of the tumor, to increase the chances of treatment success. Surgical resection was performed to remove the tumor and reduce the risk of recurrence. Histology of the tumor was consistent with chordoma, supported by positive immunohistochemical staining for S-100 and epithelial membrane antigen (EMA).Conclusions:This report highlighted the value of 3-D volume imaging in the diagnosis and treatment planning in a rare case of recurrent chordoma of the clivus. Analysis of tumor volume may be an indicator of the efficacy of surgery, complementing the Response Evaluation Criteria In Solid Tumors (RECIST) system and as a valuable tool to predict treatment outcome.

show abstract