Question 1

CT numbers are also known as which of the following?

Accepted Answer

A)  Hounsfield units 
B)  Godfrey units 
C)  Attenuation coefficient units 
A)  Hounsfield units 
B)  Godfrey units 
C)  Attenuation coefficient units A

Question 2

The conventional simulator can define treatment fields by using which of the following?

Accepted Answer

A)  Blades 
B)  Wires 
C)  OID 
D)  Collimator assembly 
A)  Blades 
B)  Wires 
C)  OID 
D)  Collimator assembly B

Question 3

A(n)_________ ring allows the CT x-ray tube to rotate in a continuous motion without the concern of cables becoming tangled.

Accepted Answer

A)  spiral 
B)  slip 
C)  aperture 
D)  electrical power 
A)  spiral 
B)  slip 
C)  aperture 
D)  electrical power B

Question 4

The matrix size is determined by the number of ___________.

Accepted Answer

A)  voxels 
B)  Hounsfield units 
C)  detectors on the scanner 
D)  pixels 
A)  voxels 
B)  Hounsfield units 
C)  detectors on the scanner 
D)  pixels

Question 5

___________ takes into consideration how much a machine will run in a normal week.

Accepted Answer

A)  Workload 
B)  Occupancy factor 
C)  Use factor 
D)  Barrier factor 
A)  Workload 
B)  Occupancy factor 
C)  Use factor 
D)  Barrier factor

Question 6

As the field of view increases and the matrix size remains constant, the spatial resolution ____________.

Accepted Answer

A)  increases 
B)  decreases 
C)  stays the same 
A)  increases 
B)  decreases 
C)  stays the same

Question 7

Which of the following represents the path of a photon when it enters the image intensifier?

Accepted Answer

A)  Input phosphor, electrostatic lenses, photocathode, anode, output screen 
B)  Input phosphor, photocathode, electrostatic lenses, anode, output screen 
C)  Input phosphor, anode, electrostatic lenses, photocathode, output screen 
D)  Anode, input phosphor, electrostatic lenses, photocathode, output screen 
A)  Input phosphor, electrostatic lenses, photocathode, anode, output screen 
B)  Input phosphor, photocathode, electrostatic lenses, anode, output screen 
C)  Input phosphor, anode, electrostatic lenses, photocathode, output screen 
D)  Anode, input phosphor, electrostatic lenses, photocathode, output screen

Question 8

The CT number for dense bone is _________.

Accepted Answer

A)  -1000 
B)  -100 
C)  0 
D)  1000 
A)  -1000 
B)  -100 
C)  0 
D)  1000

Question 9

Which of the following details the difference in completing an axial scan as compared to spiral CT?

Accepted Answer

A)  Aperture size is larger in an axial scanner. 
B)  Detector size is larger in the spiral CT scanner. 
C)  Gantry is rotating in a diagonal. 
D)  Table moves for the spiral CT. 
A)  Aperture size is larger in an axial scanner. 
B)  Detector size is larger in the spiral CT scanner. 
C)  Gantry is rotating in a diagonal. 
D)  Table moves for the spiral CT.

Question 10

The CT number for water is _____________.

Accepted Answer

A)  -1000 
B)  -100 
C)  0 
D)  1000 
A)  -1000 
B)  -100 
C)  0 
D)  1000

Question 11

Light photons are produced and transmitted electronically through to a video image at which of the following?

Accepted Answer

A)  Output phosphor 
B)  Tube housing 
C)  Photocathode 
D)  Focusing lenses 
A)  Output phosphor 
B)  Tube housing 
C)  Photocathode 
D)  Focusing lenses

Question 12

The central axis of the beam is ________________________.

Accepted Answer

A)  always located in the center of the treatment field 
B)  the only area that is nondivergent 
C)  aligned with the isocenter 
D)  both a and c 
E)  both b and c
F)a, b, and c 
A)  always located in the center of the treatment field 
B)  the only area that is nondivergent 
C)  aligned with the isocenter 
D)  both a and c 
E)  both b and c
F)a, b, and c

Question 13

The patient couch tabletop is created out of this material, which has a low density and low x-ray absorption.

Accepted Answer

A)  Plastic carbonate 
B)  Carbon fiber 
C)  Steel 
D)  Polystyrene 
A)  Plastic carbonate 
B)  Carbon fiber 
C)  Steel 
D)  Polystyrene

Question 14

Where are positioning lasers located?
I.Side (lateral)
II.Overhead
III.Sagittal
IV.Coronal

Accepted Answer

A)  I and II 
B)  I, II, and III 
C)  II and III 
D)  All of the above 
A)  I and II 
B)  I, II, and III 
C)  II and III 
D)  All of the above

Question 15

Most computed tomography (CT)scanners today are _______-generation imaging systems.

Accepted Answer

A)  first 
B)  second 
C)  third 
D)  fourth 
A)  first 
B)  second 
C)  third 
D)  fourth

Question 16

Conventional simulators are designed to simulate the ____________, geometric, and optical properties of a variety of treatment units.

Accepted Answer

A)  x-ray 
B)  mechanical 
C)  comfort 
D)  linear design 
A)  x-ray 
B)  mechanical 
C)  comfort 
D)  linear design

Question 17

__________ takes into consideration how an area on the other side of an irradiated wall is going to be used.

Accepted Answer

A)  Workload 
B)  Occupancy factor 
C)  Use factor 
D)  Barrier factor 
A)  Workload 
B)  Occupancy factor 
C)  Use factor 
D)  Barrier factor

Question 18

In the conventional simulator, the _____________ represent(s)the radiation field.

Accepted Answer

A)  blades 
B)  wires 
C)  OID 
D)  collimator assembly 
A)  blades 
B)  wires 
C)  OID 
D)  collimator assembly

Question 19

The Hounsfield unit for fat would be _________________.

Accepted Answer

A)  +1000 
B)  -500 
C)  -100 
D)  100 
A)  +1000 
B)  -500 
C)  -100 
D)  100

Exam 21: Simulator Design

CT numbers are also known as which of the following?

The conventional simulator can define treatment fields by using which of the following?

A(n)_________ ring allows the CT x-ray tube to rotate in a continuous motion without the concern of cables becoming tangled.

The matrix size is determined by the number of ___________.

___________ takes into consideration how much a machine will run in a normal week.

As the field of view increases and the matrix size remains constant, the spatial resolution ____________.

Which of the following represents the path of a photon when it enters the image intensifier?

The CT number for dense bone is _________.

Which of the following details the difference in completing an axial scan as compared to spiral CT?

The CT number for water is _____________.

Light photons are produced and transmitted electronically through to a video image at which of the following?

The central axis of the beam is ________________________.

The patient couch tabletop is created out of this material, which has a low density and low x-ray absorption.

Where are positioning lasers located? I.Side (lateral) II.Overhead III.Sagittal IV.Coronal

Most computed tomography (CT)scanners today are _______-generation imaging systems.

Conventional simulators are designed to simulate the ____________, geometric, and optical properties of a variety of treatment units.

__________ takes into consideration how an area on the other side of an irradiated wall is going to be used.

In the conventional simulator, the _____________ represent(s)the radiation field.

The Hounsfield unit for fat would be _________________.

Cancer: An Overview

The Ethics and Legal Considerations of Cancer Management

Principles of Pathology

Overview of Radiobiology

Detection and Diagnosis

Medical Imaging

Treatment Delivery Equipment

Treatment Procedures

Infection Control in Radiation Oncology Facilities

Patient Assessment

Pharmacology and Drug Administration

Applied Mathematics Review

Introduction to Radiation Therapy Physics

Aspects of Brachytherapy

Special Procedures

Particle Therapy

Radiation Safety and Protection

Patient Safety in Radiation Oncology

Quality Improvement in Radiation Oncology

Surface and Sectional Anatomy

Computed Tomography Simulation

Photon Dosimetry Concepts and Calculations

Photon Dose Distributions

Electron Beams in Radiation Therapy

Electronic Charting and Image Management

Bone, Cartilage, and Soft Tissue Sarcomas

Lymphoreticular System Tumors

Endocrine System Tumors

Respiratory System Tumors

Head and Neck Cancers

Central Nervous System Tumors

Digestive System Tumors

Gynecological Tumors

Male Reproductive and Genitourinary Tumors

Breast Cancer

Pediatric Solid Tumors

Skin Cancers and Melanoma

Filters