SU-GG-T-19 Automatic Contour Propagation between Planning Computed Tomography (CT) and Cone Beam CT (CBCT) Scan for In-Room Adaptive Planning: A Feasibility Study on Nasopharyngeal Cancer Patients

2010 ◽  
Vol 37 (6Part15) ◽  
pp. 3187-3187
Author(s):  
M Peroni ◽  
M Spadea ◽  
M Riboldi ◽  
J Seco ◽  
G Sharp ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cancer Patients ◽  
Feasibility Study ◽  
Cone Beam Ct ◽  
Nasopharyngeal Cancer ◽  
Cone Beam ◽  
Adaptive Planning ◽  
Contour Propagation ◽  
Automatic Contour

A comparison of kilovoltage and megavoltage cone beam CT in radiotherapy

2007 ◽  
Vol 6 (03) ◽  
pp. 173-178 ◽  
Author(s):  
M. Broderick ◽  
G. Menezes ◽  
M. Leech ◽  
M. Coffey ◽  
R. Appleyard
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Hounsfield Units ◽  
Adaptive Planning ◽  
Tissue Contrast ◽  
Cross Calibration ◽  
Conventional Ct ◽  
Megavoltage Cone Beam Ct

AbstractAs more and more patients are planned in 3D, the need to verify their position and treatment in 3D also becomes apparent. Megavoltage (MV) and kilovoltage (KV) cone beam computed tomography (CBCT) provide 3D verification of patient position. However, the soft tissue contrast and thus the accuracy of delineation is superior with KV CT imaging. CBCT in conjunction with energy fluence maps from electronic portal imaging devices (EPIDs) could theoretically be used to verify the dose delivered. In this instance, a cross calibration between the KV CBCT and the EPID would be required which would not be necessary with MV CBCT. Adaptive planning with CBCT poses similar challenges for both KV and MV CBCT. Although KV CBCT can produce images with Hounsfield units (HUs) comparable with conventional CT in homogenous phantoms there are large discrepancies in inhomogeneous mediums. If the cupping artefact is corrected for in MV CBCT, the HU values can compare well with KV CBCT for homogenous media. However, advances need to be made to achieve a lower patient dose with MV CBCT. At present, the lower dose required for KV CBCT allows for more frequent imaging and better image quality.

scholarly journals A Diagnosis of Maxillary Sinus Fracture with Cone-Beam CT: Case Report and Literature Review

2014 ◽  
Vol 7 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Selmi Yardimci Yilmaz ◽  
Melda Misirlioglu ◽  
Mehmet Zahit Adisen
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Maxillary Sinus ◽  
Cone Beam Ct ◽  
Maxillofacial Surgery ◽  
Maxillofacial Trauma ◽  
Cone Beam ◽  
Maxillofacial Region ◽  
Emergency Center ◽  
Frontal Wall

The purpose of this article is to present the case of maxillofacial trauma patient with maxillary sinus fracture diagnosed with cone-beam computed tomography (CBCT) and to explore the applications of this technique in evaluating the maxillofacial region. A 23-year-old male patient attempted to our clinic who had an injury at midface with complaints of swelling, numbness. The patient was examined before in emergency center but any diagnosis was made about the maxillofacial trauma. The patient re-examined clinically and radiographically. A fracture on the frontal wall of maxillary sinus is determined with the aid of CBCT. The patient consulted with the department of maxillofacial surgery and it is decided that any surgical treatment was not necessary. The emerging technique CBCT would not be the primary choice of imaging maxillofacial trauma. Nevertheless, when advantages considered this imaging procedure could be the modality of choice according to the case.

scholarly journals Versatility of the cone beam computed tomography in oral surgery: an overview

2011 ◽  
Vol 1 (2) ◽  
pp. 31
Author(s):  
Kishan G. Panicker ◽  
Anuroopa Pudukulangara Nair ◽  
Bipin Chandra Reddy
Keyword(s):  
Computed Tomography ◽  
Alveolar Bone ◽  
Oral Surgery ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Facial Skeleton ◽  
Posterior Teeth ◽  
True Nature ◽  
Root Apices ◽  
Relationship Of

Cone beam CT (CBCT) produces threedimensional information on the facial skeleton, teeth and their surrounding tissues; and is increasingly being used in many of the dental specialties. This is usually achieved with a substantially lower effective dose compared with conventional medical computed tomography (CT). Periapical pathologies, root fractures, root canal anatomy and the true nature of the alveolar bone topography around teeth may be assessed. CBCT scans are desirable to assess posterior teeth prior to periapical surgery, as the thickness of the cortical and cancellous bone can be accurately determined as can the inclination of roots in relation to the surrounding jaw. The relationship of anatomical structures such as the maxillary sinus and inferior dental nerve to the root apices may also be clearly visualized. Measurements on CBCT are more accurate when compared with OPG. Therefore, CBCT permits the clinician to have all necessary information when planning dental implants. The purpose of this article is to provide an overview of the unique image display capabilities of maxillofacial CBCT systems and to illustrate specific applications in clinical practice.

Feasibility study of a s ynchronized-mo ving-g rid (SMOG) system to improve image quality in cone-beam computed tomography (CBCT)

2012 ◽  
Vol 39 (8) ◽  
pp. 5099-5110 ◽  
Author(s):  
Lei Ren ◽  
Fang-Fang Yin ◽  
Indrin J. Chetty ◽  
David A. Jaffray ◽  
Jian-Yue Jin
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Feasibility Study ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Improve Image Quality

scholarly journals Evaluation of Anatomoradiological Findings on Trigeminal Neuralgia Patients Using Computed Tomography and Cone-Beam Computed Tomography

Diagnostics ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 73
Author(s):  
Seçil Aksoy ◽  
Arzu Sayın Şakul ◽  
Durmuş İlker Görür ◽  
Bayram Ufuk Şakul ◽  
Kaan Orhan
Keyword(s):  
Computed Tomography ◽  
Trigeminal Neuralgia ◽  
Cone Beam Ct ◽  
Median Plane ◽  
Cone Beam ◽  
Foramen Ovale ◽  
Percutaneous Procedures ◽  
The Right ◽  
And Control ◽  
Supraorbital Foramen

The study aimed to establish and evaluate anatomoradiological landmarks in trigeminal neuralgia patients using computed tomography (CT) and cone-beam CT. CT images of 40 trigeminal neuralgia (TN) and 40 healthy individuals were retrospectively analyzed and enrolled in the study. The width and length of the foramen rotundum (FR), foramen ovale (FO), foramen supraorbitale, and infraorbitale were measured. The distances between these foramen, between these foramen to the median plane, and between the superior orbital fissure, FO, and FR to clinoid processes were also measured bilaterally. Variations were evaluated according to groups. Significant differences were found for width and length of the foramen ovale, length of the foramen supraorbitale, and infraorbitale between TN and control subjects (p < 0.05). On both sides, FO gets narrower and the length of the infraorbital and supraorbital foramen shortens in the TN group. In most of the control patients, the plane which passes through the infraorbital and supraorbital foramen intersects with impression trigeminale; 70% on the right-side, and 67% in the left-side TN groups. This plane does not intersect with impression trigeminale and deviates in certain degrees. The determination of specific landmarks allows customization to individual patient anatomy and may help the surgeon achieve a more selective effect with a variety of percutaneous procedures in trigeminal neuralgia patients.

Sign in / Sign up

Export Citation Format

Share Document