Deck 13: Other Technical Applications of Computed Tomography Imaging: Basic Principles

Question 1

Which visualization tool is the most frequently used in computed tomographic angiography examinations to display the structure of vessels?

A)interactive cine
B)maximum intensity projection
C)shaded surface display
D)volume rendering

Answer 1

maximum intensity projection

Question 2

The direct conversion flat-panel detector is used in flat-detector computed tomography systems.

Answer 2

False

Question 3

All of the following are steps crucial to performing a computed tomographic angiography examination except:

A)acquisition measures
B)contrast media administration
C)decreased collimation
D)patient preparation

Answer 3

decreased collimation

Question 4

During data acquisition in computed tomography fluoroscopy, the patient remains stationary.

Question 5

Image fusion is computer software that can integrate the image data from computed tomography, magnetic resonance imaging, positron emission tomography, single-photon emissions computed tomography, and ultrasonography.

Question 6

Cardiac computed tomography applications include all of the following except:

A)coronary angiography
B)assessment of pulmonary veins
C)gated stress imaging
D)ventricular function assessment

Question 7

Which of the following are dedicated cardiac computed tomography scanners? I. dual-source
II) dual-slice
III) AquilionONE

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 8

Computed tomographic angiography techniques have proved useful in imaging the following: I. coronary artery disease
II) renal vasculature
III) stroke

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 9

The size of the needle and site of injection are not important during a computed tomographic angiography examination.

Question 10

A virtual simulator is hardware that recreates the treatment machine.

Question 11

The goal of radiation therapy is to kill tumor cells without harming surrounding healthy tissue.

Question 12

Maximum intensity projection can be used to separate all of the following except:

A)cerebral vascular accidents
B)intravascular thrombus
C)lumen thrombus
D)vascular calcifications

Question 13

The table speed can be expressed as:
I. d = R/T
II. d = R + S/t
III. d = S * P/t

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 14

The image reconstruction space refers to the spacing between the center of the slices.

Question 15

The selection of peak kilovoltage and milliamperage used in computed tomographic angiography examinations is usually determined by: I. abnormalities of the area being imaged
II) level of noise in the images
III) patient size

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 16

Which of the following visualization tools reconstructs faster than any other three-dimensional technique?

A)interactive cine
B)multiplanar reconstruction
C)shaded surface display
D)volume rendering

Question 17

All of the following are automated systems used to assist with contrast administration except:

A)CARE Bolus
B)Smart Bolus
C)Smart Prep
D)Sure Start

Question 18

Portable multislice computed tomography scanners can be transported to critically ill patients.

Question 19

Three-dimensional imaging of vascular structures with an intravenous injection of contrast media is called computed tomography angiography.

Question 20

Shaded surface display images are useful in the display of all of the following except:

A)demonstrating tortuous structures
B)surface controls of vessels
C)vascular relationships
D)vessel origins

Question 21

Dedicated hardware components of computed tomography fluoroscopy include: I. back-projection gate array
II) fast arithmetic unit
III) high-speed memory

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 22

Which step in the computed tomography simulation process includes the beam placement and the treatment design that are executed with virtual simulation software?

A)planning of the treatment
B)reconstruction of the images
C)scanning of the patient
D)treatment setup

Question 23

Which volume-rendering parameter refers to the degree that structures close to the user obscure structures that are farther away?

A)accuracy
B)brightness
C)opacity
D)windowing

Question 24

All the following are advantages offered by flat-detector technology in breast computed tomography scanning except:

A)decreased dose
B)excellent linearity
C)high spatial resolution
D)no geometric distortion

Question 25

The basis for continuous computed tomography imaging depends on: I. fast processing algorithm
II) high-speed processing of data
III) slip-ring technology

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 26

Which visualization tool refers to the viewing and evaluation of the images in the axial data set by panning through the set of images?

A)interactive cine
B)maximum intensity projection
C)multiplanar reconstructions
D)volume rendering

Question 27

Flat-detector computed tomography systems are being used in all of the following except:

A)breast computed tomography imaging
B)maxillofacial scanning
C)quantitative computed tomography
D)radiation therapy

Question 28

Technical developments in radiation therapy intended to improve the clinical performance of radiation treatment schemes include all of the following except:

A)accurate localization of tumor volumes
B)dose fractionation values
C)image guidance
D)target delineation

Question 29

The computed tomography simulation process includes: I. scan the patient in the computed tomography scanner
II) plan the treatment and computed tomography simulation
III) treatment setup

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 30

All of the following are fundamental imaging principles involved in real-time computed tomography except:

A)continuous image display
B)fast continuous scanning
C)fast image reconstruction
D)volume-rendering capabilities

Question 31

The computed tomography simulator features all of the following notable components except:

A)flat table top with immobilization devices
B)large gantry aperture
C)smaller detector array
D)registration device

Question 32

Which of the following can reduce the dose to the patient during computed tomography fluoroscopy? I. lower tube currents
II) shorter examination times
III) special x-ray filters

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 33

During the development of computed tomography fluoroscopy, the dose to the ________ of the operator was a concern.

A)eyes
B)hands
C)skin
D)thyroid

Question 34

Which visualization technique uses all of the information in the axial data set to display internal structures?

A)interactive cine
B)maximum intensity projection
C)multiplanar reconstructions
D)volume rendering

Question 35

The procedure that describes a geometric simulation process that provides beam arrangements and treatment fields without any dosimetric information is:

A)computed tomography fluoroscopy
B)computed tomography simulation
C)quantitative computed tomography
D)virtual reality computed tomography

Question 36

Protective apparel must be __________ lead equivalent.

A)0.5 mm
B)1.0 mm
C)1.5 mm
D)2.0 mm

Question 37

Image quality parameters in computed tomography fluoroscopy include all of the following except:

A)artifacts
B)contrast resolution
C)density resolution
D)spatial resolution

Question 38

The control console for computed tomography fluoroscopy allows the operator to have control of: I. table height
II) table movement
III) detector selection

A)I and II
B)II and III
C)I and III
D)I, II, and III

Question 39

Operators standing in the computed tomography room during the procedure must wear all of the following except:

A)lead aprons
B)lead glasses
C)sterile gowns
D)thyroid shields

Question 40

The maximum fluoroscopy time for continuous imaging is:

A)50 seconds
B)100 seconds
C)150 seconds
D)200 seconds

Question 41

Please match the following computed tomography applications. All answer selections will be used just once.

Computed tomography fluoroscopy

A)Used in radiation oncology departments
B)Used to measure bone mineral density
C)Imaging of vascular structures with the use of intravenous contrast
D)Real-time computed tomography
E)Used to image critically ill patients
F)Used to image asymptomatic patients

Question 42

Computed tomography screening has been used in all of the following except:

A)breast screening
B)colon screening
C)lung cancer screening
D)whole-body screening of healthy patients

Question 43

All of the following are problems associated with transporting patients to a fixed computed tomography scanner except:

A)cost of staff involved in the transport
B)inconvenience to the patient's family
C)maintenance of nurse-to-patient ratio
D)risk of transporting unstable patients

Question 44

Please match the following computed tomography applications. All answer selections will be used just once.

Computed tomography screening

A)Used in radiation oncology departments
B)Used to measure bone mineral density
C)Imaging of vascular structures with the use of intravenous contrast
D)Real-time computed tomography
E)Used to image critically ill patients
F)Used to image asymptomatic patients

Question 45

The use of any medical technology for early detection of disease in asymptomatic patients is referred to as:

A)maintenance
B)prevention
C)screening
D)treatment

Question 46

Please match the following computed tomography applications. All answer selections will be used just once.

Computed tomographic angiography

A)Used in radiation oncology departments
B)Used to measure bone mineral density
C)Imaging of vascular structures with the use of intravenous contrast
D)Real-time computed tomography
E)Used to image critically ill patients
F)Used to image asymptomatic patients

Question 47

Please match the following computed tomography applications. All answer selections will be used just once.

Computed tomography simulation

A)Used in radiation oncology departments
B)Used to measure bone mineral density
C)Imaging of vascular structures with the use of intravenous contrast
D)Real-time computed tomography
E)Used to image critically ill patients
F)Used to image asymptomatic patients

Question 48

Which of the following is the most sensitive of all x-ray techniques for measurement of bone mineral density?

A)bone densitometry
B)dual x-ray absorptiometry
C)quantitative computed tomography
D)trabecular magnetic resonance imaging

Question 49

Please match the following computed tomography applications. All answer selections will be used just once.

Portable multislice computed tomography

A)Used in radiation oncology departments
B)Used to measure bone mineral density
C)Imaging of vascular structures with the use of intravenous contrast
D)Real-time computed tomography
E)Used to image critically ill patients
F)Used to image asymptomatic patients

Question 50

Please match the following computed tomography applications. All answer selections will be used just once.

Quantitative computed tomography

A)Used in radiation oncology departments
B)Used to measure bone mineral density
C)Imaging of vascular structures with the use of intravenous contrast
D)Real-time computed tomography
E)Used to image critically ill patients
F)Used to image asymptomatic patients