Exam 26: Three-Dimensional Digital Imaging

(1)There are CBCT machines that have shortened exposure times of 8-10 seconds.(2)This shortened exposure time results in increased patient cooperation and decreased artifacts caused from patient movement.

Three-dimensional imaging is encoded for handling,storage,and transmission by which of the following?

(1)Contrast resolution and the size of the field of view can both be adjusted on CBCT machines.(2)Spatial resolution cannot be adjusted.

Viewing software allows the practitioner to select the region of interest and to scroll through these images on a computer monitor to create three-dimensional information that will assist in ____________. 1)obtaining insurance reimbursement 2)referrals 3)diagnosis and treatment planning

Common uses of three-dimensional imaging include which of the following? 1)Implant placement 2)Extraction or exposure of impacted teeth 3)Definition of anatomic structures 4)Airway and sinus analysis 5)Evaluation of temporomandibular joint disorders

The image produced on the receptor following exposure to the x-ray beam is

(1)Failure of the dental practitioner to evaluate,interpret,and document observations outside the region of dental interest could result in negative consequences for the patient.(2)It is not the responsibility of the dental practitioner to recognize findings and pathology outside the region of dental interest.

(1)One of the advantages of using DICOM Data is that images among dental professionals,imaging centers,and physicians may be shared.(2)The volume of data produced is similar to medical computed tomography but CBCT uses more radiation to acquire the images.

(1)Three-dimensional imaging provides a more accurate image than traditional two-dimensional imaging.(2)Locations,distances,sizes,and shapes of pathology and anatomic landmarks,including eruption patterns,are more accurately represented with three-dimensional imaging.

Metallic restorations may eliminate or hide the surrounding anatomy with the appearance of

Radiation is stopped and may not reach the receptor when it interacts with an area of high attenuation such as

The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body is called

(1)If the field of view is large,findings or pathology in other regions of the oral and maxillofacial complex may be accidently included.(2)The size of the field of view should not matter if a high-quality machine is used.

The acronym,DICOM,stands for

(1)Cone-beam data is said to have a 1:2 relationship with the anatomy.(2)With CBCT imaging,anatomy can be accurately reproduced,the superimposition of structures is eliminated,and image magnification doesn't occur.

(1)Cone-beam computed tomography utilizes a vertical,narrow x-ray beam,similar to panoramic imaging,to acquire three-dimensional information.(2)The source of radiation in the CBCT machines rotates around the head of the patient.

(1)In preparation for a CBCT scan,you should explain to your patient how she will be positioned and the length of time she will need to be motionless.(2)Your patient will be able to leave her jewelry on but will need to remove her partial denture.

(1)Until recently,three-dimensional imaging has been used primarily for medical image purposes.(2)Cone-beam computed tomography was developed for use in dentistry to evaluate the oral and maxillofacial areas of the head and neck.

The specialized equipment necessary for three-dimensional imaging that accepts the raw data and converts it to a stack of axial images called DICOM images is called the

The number of gray-scale colors available to be chosen for each pixel in the image is called