Deck 26: Three-Dimensional Digital Imaging

Question 1

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Answer 1

Both statements are true.

Question 2

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Answer 2

The first statement is true;the second statement is false.

Question 3

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

A)two-dimensional volume rendering.
B)three-dimensional volume rendering.
C)spatial resolution.
D)contrast resolution.

Answer 3

contrast resolution.

Question 4

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

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 5

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

A)computer analysis.
B)image.
C)raw data.
D)DICOM data.

Question 6

When viewed together,the axial,coronal,and sagittal images are referred to as

A)three-dimensional digital imaging.
B)multiplanar reconstructed images.
C)cone-beam computed tomography.
D)cone-beam volume tomography.

Question 7

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

A)computer.
B)control panel.
C)imaging hardware.
D)CBCT machine.

Question 8

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 9

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 10

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 11

The acronym,DICOM,stands for

A)Digital Imaging and Communication in Medicine.
B)Direct Imaging and Cone-beam Modality.
C)Distance Imaging and Communications in Medicine.
D)Divergent Images and Cone-beam Modus.

Question 12

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

A)1
B)2
C)3
D)1,2,3

Question 13

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 14

With CBCT,the divergent rays exit the machine and some of the radiation is attenuated by the patient.In this statement,attenuated means

A)to dilute.
B)to amplify.
C)to increase the strength of.
D)to intensify.

Question 15

Your patient is concerned about the amount of radiation she is receiving from the dental x-rays she has been receiving.You will be taking a CBCT scan.Based on evidence-based research,you can share with your patient that the CBCT scan is equal to which of the following?

A)Three or four panoramic images
B)Three or four full-mouth series of intraoral images
C)A CT procedure of the head and neck
D)A set of bite-wing images

Question 16

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 17

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

A)multiplanar reconstruction.
B)axial plane.
C)coronal plane.
D)sagittal plane.

Question 18

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 19

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

A)Cone-beam computed tomography
B)Digital Imaging and Communications in Medicine
C)Voxel
D)Spatial resolution

Question 20

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

A)1,2,3,4,5
B)2,4,5
C)1,2,3
D)3,4

Question 21

(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.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 22

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

A)high density.
B)fogged film.
C)streak artifacts.
D)blank images.

Question 23

(1)Many dental professionals who incorporate CBCT into their practices have not had the training required to interpret anatomy beyond the maxilla and mandible.(2)The AAOMR recommends that CBCT and implant imaging be interpreted only by a board certified oral and maxillofacial radiologist or a dentist with adequate training and/or experience.

A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.

Question 24

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

A)soft tissue.
B)large amalgam restorations.
C)periodontal abscess.
D)normal anatomic structures.