Chapter 26: Three-Dimensional Digital Imaging

Chapter 26: Three-Dimensional Digital Imaging

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. (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.

 

 

ANS:  A

These geometric characteristics limit the accurate interpretation of traditional two-dimensional images. The dental practitioner, therefore, may not have the ability to evaluate pathology (e.g., bony and soft tissue), distances to critical anatomic landmarks (e.g., maxillary sinus, mandibular canal), locations of impacted teeth, eruption patterns, or other concerns of the oral and maxillofacial complex. Three-dimensional imaging provides more detailed information allowing for a more accurate interpretation.

 

DIF:    Comprehension                               REF:   Page 299        OBJ:   2

TOP:   CDA, RHS, I.B.1.c.iii. Demonstrate basic understanding of CBCT (cone-beam computed tomography)      MSC:           NBDHE, 2.5 General

 

2. 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

 

 

ANS:  B

Cone-beam computed tomography (CBCT) is the term used to describe computer-assisted digital imaging in dentistry. The universal format for handling, storing, and transmitting three-dimensional images is called Digital Imaging and Communications in Medicine. Voxel refers to the smallest element of a three-dimensional image. Spatial resolution is a measurement of pixel size in multiplanar reconstruction.

 

DIF:    Comprehension                               REF:   Page 299        OBJ:   2

TOP:   CDA, RHS, I.B.1.c.iii. Demonstrate basic understanding of CBCT (cone-beam computed tomography)      MSC:           NBDHE, 2.5 General

 

3. 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.

 

 

ANS:  A

The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body is called multiplanar reconstruction. Axial plane is a horizontal plane that divides the body into superior and inferior parts. Coronal plane is a vertical plane that divides the body into anterior and posterior sides. Sagittal plane is a vertical plane that divides the body into right and left sides.

 

DIF:    Recall             REF:   Page 299        OBJ:   1 | 2

TOP:   CDA, RHS, I.B.1.c.iii. Demonstrate basic understanding of CBCT (cone-beam computed tomography)      MSC:           NBDHE, 2.5 General

 

4. 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.

 

 

ANS:  D

The number of gray-scale colors available to be chosen for each pixel in the image is called contrast resolution. Three-dimensional volume rendering is a three-dimensional shape that is created from two-dimensional images. Spatial resolution is a measurement of pixel size in multiplanar reconstruction.

 

DIF:    Recall             REF:   Page 299        OBJ:   2

TOP:   CDA, RHS, I.B.1.c.iii. Demonstrate basic understanding of CBCT (cone-beam computed tomography)      MSC:           NBDHE, 2.5 General