Deck 7: Basic Instrumentation

Question 1

All of the following are major systems in the basic equipment configuration for computed tomography (CT) except:

A) imaging system.
B) computer system.
C) image display, recording, storage, and communication system.
D) dictation system.

Answer 1

dictation system.

Question 2

The X-ray generator for CT scanners is usually a:

A) single-phase, half-wave rectified unit.
B) high-frequency unit.
C) three-phase, six-pulse generator.
D) three-phase, 12-pulse generator.

Answer 2

high-frequency unit.

Question 3

What classification of CT software builds the CT image from the raw data collected from the detectors?

A) Reconstruction software
B) Reformation software
C) Preprocessing software
D) Image postprocessing software

Answer 3

Reconstruction software

Question 4

The typical matrix size of a typical CT image is:

A) 32 * 32 * 8 bytes deep.
B) 128 * 128* 8 bytes deep.
C) 56 * 256 * 10 bytes deep.
D) 512 * 512 * 8 bytes deep.

Question 5

Which of the following does the computer system perform?

A) Detects radiation
B) Image manipulation
C) Display the output image
D) Provides a hard copy

Question 6

The ideal couch top (table top) of a CT scanner table has all of the following features except:

A) low radiation absorption characteristics.
B) excellent vibration-damping features.
C) carbon fiber design.
D) limited horizontal and vertical movements.

Question 7

The opening in the gantry in which the patient is positioned during scanning is called the:

A) rotating frame.
B) isocenter.
C) gantry aperture.
D) positioning hole.

Question 8

The imaging system components are located in the:

A) scanner room.
B) radiologist viewing area.
C) operator room.
D) computer room.

Question 9

Which of the following is where images are stored in a filmless imaging department?

A) Hospital information system
B) Radiology information system
C) Picture archiving and communications system (PACS)
D) Data acquisition system

Question 10

The purpose of the imaging system is to perform all of the following except:

A) detect and measure the radiation passing through the cross-section.
B) produce X-rays.
C) store images for retrieval.
D) shape and filter the X-ray.

Question 11

What method of image compression results in the loss of no information during the compression process?

A) Irreversible compression
B) Lossy compression
C) Permanent compression
D) Lossless compression

Question 12

The computer system receives _________ data from the data acquisition system.

A) analog
B) digital
C) manipulated
D) hard copy

Question 13

The design that incorporates the high-voltage generator on the rotating frame of the CT gantry eliminates:

A) the need for long high-tension cables.
B) the need for short high-tension cables.
C) the detectors from within the gantry.
D) the need for any cables.

Question 14

Which of the following is part of the imaging system?

A) The CT control console
B) The X-ray tube and detectors
C) The cathode ray tube display device
D) The central processing unit (CPU)

Question 15

All of the following media forms can be used to store CT images except:

A) VHS tapes.
B) magnetic disks.
C) laser optical disks.
D) digital videotape.

Question 16

In general, the tilting range of a CT gantry is about:

A) ±12 degrees to ±30 degrees.
B) ±2 degrees to ±5 degrees.
C) ±5 degrees to ±5 degrees.
D) no tilting of the gantry is possible.

Question 17

The computer system for CT includes all of the following except:

A) detector electronics.
B) input-output devices.
C) the CPU.
D) array processors and back-projector.

Question 18

Which of the following allows the technologist to alter picture contrast?

A) Touch panel
B) Floating keyboard alphanumerical keys
C) Floppy disk drive
D) Window controls

Question 19

All of the following are purposes of the image display, recording, storage, and communication system except:

A) displays the output digital image.
B) provides a hard copy.
C) facilitates storage.
D) enables scanning procedures.

Question 20

Most scanners have a gantry aperture of about:

A) 70 mm.
B) 70 inches.
C) 100 cm.
D) 70 cm.

Question 21

Hardware refers to the instructions or programs written for the computer to solve problems in a specific way.

Question 22

The term pipelining describes a method of processing information with separate computers performing different tasks as combined work.

Question 23

Typical operating modes include priority scan mode and static scan mode.

Question 24

CT workstation computers are classified as supercomputers for their processing capabilities and size.

Question 25

Software modules for CT scanners allow each of the following except:

A) facilitate modification of existing packages.
B) revise existing software.
C) alternate analog signals into digital.
D) update existing software.

Question 26

The CT gantry houses all of the following except:

A) the X-ray tube and generator.
B) the CPU.
C) the detector electronics.
D) collimators.

Question 27

The processing hardware of the computer includes the internal memory and acts as the brain of the computer.

Question 28

Digital Imaging and Communications in Medicine (DICOM) is a standard for connectivity in radiology in order to allow multimodality and multivendor communication.

Question 29

Which information system is responsible for patient registration, exam scheduling, and patient tracking?

A) HIS
B) RIS
C) PACS
D) Voice-recognition direction system

Question 30

Communications refer to electronic networking or connectivity with use of a local-area or wide-area network.

Question 31

The concept of modular design in CT scanner development is intended to:

A) simplify technologist operation.
B) simplify upgrading of scanners.
C) simplify radiologist interpretation of images.
D) make the patient more comfortable.

Question 32

Which room generally houses the gantry and patient couch and should be large enough to accommodate gurneys and emergency equipment?

A) Scanning room
B) Computer room
C) Control room
D) Digital room

Question 33

Hardware modules include all of the following except:

A) back-projectors.
B) array processors.
C) analog to digital conversion cards.
D) application systems packages.

Question 34

Which of the following houses the host computer and other peripheral computing equipment?

A) The computer room
B) The control room
C) The operator and observer room
D) The scanning room

Question 35

The following are accessories for a CT scanner except:

A) axial head holder.
B) knee support pad.
C) array processor.
D) pediatric cradle.

Question 36

The computer room generally houses the film recording equipment.

Question 37

Which of the following supports the patient during a CT examination?

A) Life-support equipment
B) The technologist and radiologist
C) The gantry aperture
D) The CT table or patient couch

Question 38

Quality control (QC) equipment is part of the equipment specifications for CT.

Question 39

LAN networks connect computers separated by large distances.

Question 40

Which of the following allows the technologist to devote more time to the scanning procedure and the needs of the patient?

A) The television monitor
B) Control functions
C) Floppy disks
D) The line printer