Source:  CBCT    Tag:  cbct scan

Cone beam computed tomography is a medical imaging technique consisting of X-ray computed tomography where the X-rays are divergent, forming a cone.
"Population Inversion" occurs when the two sources are mixed together and photons are given off thereby producing the "LASER" activity. This activity is resonated or reflected back and forth within an optical resonator and amplified. A portion of this activity is then emitted as a LASER beam. Beam splitters or mirrors are used to capture the particular portion of the LASER beam that is needed to perform the surgical operation
A CT image comprises slices along a plane of the object being viewed. The slices, called voxels, are then reconstructed. The x-ray energy from a CT scan is directed toward an object from multiple orientations, and the decrease in intensity is measured along a series of linear paths In layman's terms, CBCT is a compact, faster and safer version of the regular CT. Through the use of a cone shaped X-Ray beam, the size of the scanner, radiation dosage and time needed for scanning are all dramatically reduced.
A typical CBCT scanner can fit easily into any dental practice and is easily accessible by patients. The time needed for a full scan is typically under one minute and the radiation dosage is up to a hundred times less than that of a regular CT scanner.
Indications of CBCT in the Maxillofacial Region
  • Evaluation of the jaw bones to assess the feasibility of placing dental implants at specific sites in the jaws. This ensures that every possible precaution has been made to reduce the risk of involvement of the nerves in the lower jaw, and the sinuses and nose in the upper jaw.
  • Evaluation of the status of previously placed implants
  • Evaluation of the hard tissue (bones) of the tempro-mandibular joint (TMJ)
  • Evaluation of abnormalities (pathology) in or affecting the bonesEvaluate extent of alveolar ridge resorption
  • Assessment of relevant structures prior to orthodontic treatment such as the presence and position of impacted canine and third molar teeth
  • Assessing symmetry of the face (cephalometrics)
  • To permit 3D reconstructions of the bones or the fabrication of a Biomodel of the face and jaws
  • Assessing the mandibular nerve prior to the removal of impacted teeth, especially the lower wisdom teeth
  • A CBCT scan provides precise information about pathology, the locations and dimensions of vital anatomical structures, bone quality, and any issues that might interfere with treatment planning.
Specific Applications
  • Oral surgery
  • Implant planning
  • Orthodontic planning, implant anchorage
  • Cephalometric Analysis
  • TMJ analysis
  • Airway study (sleep apnea)
  • Jaw Tumor
  • Impacted teeth
  • Periodontal disease
  • Endodontic anomalies.
  • X-Ray Radiation exposure to the patient is up 10 times less than a regular CT scanner.
  • Much faster scan time. Scan on a CBCT takes between 10-40 sec, while on a regular CT scanner it takes a few minutes.
  • Unlike regular x-rays CT scans can discriminate between many types of tissue including bone, teeth, nerves and soft tissue.
  • CT scans are noninvasive, and can eliminate the need for exploratory surgery in some cases.
  • CT can identify the effects of conditions such as infection and tumors.
  • A cost effective tool for imaging a wide range of clinical problems.
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