RAD: Ch. 27 - CBCT Principles and Techniques

What is the purpose of three-dimensional digital imaging?

To evaluate the oral-maxillofacial complex using a cone-shaped x-ray beam.

What does DICOM stand for?

Digital Imaging and Communications in Medicine, a universal format for handling, storing, and transmitting 3-D images.

What is a voxel?

The smallest element of a three-dimensional image.

What are the three planes used in three-dimensional digital imaging?

Axial plane, coronal plane, and sagittal plane.

What is the field of view (FOV) in three-dimensional digital imaging?

The area captured during imaging.

What is the advantage of multiplanar reconstruction (MPR)?

It allows viewing all three planes together for better interpretation.

What organization recommends that CBCT images be interpreted by a certified radiologist?

The American Academy of Oral and Maxillofacial Radiology (AAOMR).

What is a common use of three-dimensional digital imaging in dentistry?

Implant placement, extraction of impacted teeth, and endodontic assessment.

What is a disadvantage of three-dimensional digital imaging?

Patient movement can cause artifacts in the images.

What type of machine is used for three-dimensional digital imaging?

A cone beam computed tomography (CBCT) machine.

What is the role of viewing software in three-dimensional digital imaging?

It allows practitioners to view axial, coronal, and sagittal images.

What should patients do before exposure to x-radiation in three-dimensional imaging?

Remove jewelry, eyeglasses, and removable dental appliances.

What is the typical scan time for three-dimensional digital imaging?

Scan times vary from 7 to 30 seconds.

What is a key advantage of three-dimensional digital imaging?

Lower radiation dose compared to traditional imaging methods.

What is the significance of patient positioning during imaging?

Patients must remain still to ensure accurate imaging.

What is cone beam volume tomography (CBVT)?

A term used to describe 3-D digital imaging in dentistry, similar to CBCT.

What is the importance of ergonomic head and chin supports?

They improve patient comfort during the imaging process.

What is the process of data reconstruction in three-dimensional imaging?

The technique where raw data is converted into a stack of axial images.

What are the common anatomical evaluations performed using three-dimensional digital imaging?

Airway and sinus analysis, evaluation of temporomandibular joint disorders, and trauma evaluation.

What does the term 'anatomically accurate images' refer to?

Images that accurately represent the anatomical structures of the patient.

What is the significance of training in three-dimensional digital imaging?

Proper training is necessary to interpret images accurately and ensure optimum patient care.

What is one of the limitations regarding the size of the field of view in three-dimensional imaging?

The size of the field of view may limit the areas that can be accurately captured.

What is the role of a guide during the scanning process?

A guide may be placed in the patient's mouth to assist with proper positioning.