Radiologic Sciences
Final Exam
Course Introduction
Radiologic Sciences is a multidisciplinary course that explores the fundamental principles, techniques, and clinical applications of medical imaging used in the diagnosis and treatment of diseases. The curriculum covers key topics such as anatomy, radiation physics, imaging modalities (including X-ray, CT, MRI, ultrasound, and nuclear medicine), patient care, radiation safety, and ethical considerations. Students gain a comprehensive understanding of image acquisition, interpretation, and the critical role radiologic technologists play within the healthcare team, preparing them for both clinical practice and future advancements in the field.
Recommended Textbook
Digital Radiography An Introduction 1st Edition by Euclid Seeram
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10 Chapters
500 Verified Questions
500 Flashcards
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Page 2
Chapter 1: Digital Radiography: An Overview
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Sample Questions
Q1) The term ____, as used in this book, refers to projection radiography, whereby computers process data collected from patients using special electronic detectors that have replaced the X-ray film cassette.
A)filmless imaging
B)digital radiography
C)film-screen radiography
D)digital mammography
Answer: B
Q2) One of the major problems with the ____________________ process is poor image quality if the initial radiation exposure has not been accurately determined. Answer: radiographic imaging
Q3) Film-based imaging is limited in its ____________________. Answer: contrast resolution
Q4) Direct conversion digital radiography systems use detectors that convert X-rays directly into ____________________. Answer: electrical signals
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Chapter 2: Digital Imaging Processing Concepts
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50 Flashcards
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Sample Questions
Q1) Where do MRIs acquire data from the patient?
A)spatial frequency domain
B)horizontal location domain
C)horizontal frequency domain
D)spatial location domain
Answer: A
Q2) What can be located using the X-Y coordinate system?
A)X-axis
B)pixel
C)Y-axis
D)spatial location
Answer: B
Q3) Which of the following is now a routine activity in digital medical imaging, and also an essential tool in the PACS environment?
A)image pre-processing
B)global processing
C)image post-processing
D)low-pass filtering
Answer: C
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Page 4
Chapter 3: Computed Radiography: Physics and Technology
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Sample Questions
Q1) Once the fixed stationary IP is exposed, the ____________________ image is acquired using a scanning technology appropriate to the system.
Answer: patent
Q2) Photostimulable phosphors have the property of creating and storing a(n) ____________________ when exposed to X-rays.
Answer: latent image
Q3) A(n) ____________________ indicator is a numerical parameter used to monitor the radiation exposure to the IP in CR imaging.
Answer: exposure
Q4) Which term refers to the time it takes for a latent image to disappear?
A)fading
B)absorption
C)conduction
D)imaging
Answer: A
Q5) In general, the greater the bit ____________________, the better the density resolution of the image.
Answer: depth
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Chapter 4: Effective Use of Computed Radiography
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Sample Questions
Q1) _____________________ means that the photon intensity reaching the receptor is higher than that required to produce an optimal image.
Q2) The lack of ____________________ generates more scatter that reduces the contrast.
Q3) With cassette-based PSP systems (CR), ____________________ resolution becomes a bit more complicated.
Q4) What results in flattening of the luminance from the plate and loss of contrast?
A)scatter radiation
B)incorrect beam
C)grid cutoff
D)rescaling error
Q5) ____ are much more susceptible to fogging than are conventional film-screen systems.
A)PSP plates
B)image plates
C)IP plates
D)plate margins
Q6) Because of their wide dynamic range, PSP plates are much more susceptible to ____________________ than are conventional film-screen systems.
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Chapter 5: Flat-Panel Digital Radiography
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Sample Questions
Q1) The flat-panel TFT digital detector is designed as a matrix of detector elements, each of which can be regarded as a(n) ____________________.
Q2) Which of the following describes the ability of the imaging system to resolve fine details present in an object?
A)spatial resolution
B)modulation transfer function
C)dynamic range
D)ghosting
Q3) Flaws in the various components that make up a panel can lead to image lag.
A)True
B)False
Q4) With indirect flat-panel TFT digital detectors, what is used to first convert X-ray photons into light photons?
A)scintillator layer
B)k-edge characteristic
C)electrical charge
D)photoconductor
Q5) Flat-panel digital detectors are complex devices and pose numerous challenges in the ____________________ process.
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Chapter 6: Digital Fluoroscopy
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Sample Questions
Q1) A(n) ____ couples the video camera to the television monitor by means of a coaxial cable and control electronics.
A)X-ray tube and generator
B)closed-circuit X-ray television
C)grid-controlled X-ray tube
D)X-ray beam
Q2) Dynamic FPD detectors were first used in GI tract fluoroscopy and then later in angiography.
A)True
B)False
Q3) The range of the numbers in FPDs is defined as the window level and the center of the range is defined as the window width.
A)True
B)False
Q4) The purpose of ____________________ frame averaging is to reduce the noise present in an image by continuously displaying an image that is created by averaging the current frame with one or more previous frames of digital fluoroscopic image data.
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8
Chapter 7: Digital Mammography
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Sample Questions
Q1) Peripheral equalization displays lesion details well and preserves the peripheral information in the surrounding breast, but there may be a flattening of the image contrast in the ____________________ portions of the image.
Q2) Image processing is designed to optimize the quality of the output, but it should be remembered that sub-optimal image processing and display has the potential to result in image degradation and ____________________.
Q3) The CsI phosphor is deposited on top of the a-Si TFT array in a needle-like fashion (to reduce lateral dispersion of light in order to improve image detail) and converts X-rays into images.
A)True
B)False
Q4) The detector system consists of a thin layer of a(n) ____________________, a-Se, deposited onto a readout layer of electronics.
Q5) The overall diagnostic accuracy of digital and film mammography as a means of screening for breast cancer is similar, but ____________________ mammography is more accurate in women under the age of 50 years, women with radiographically dense breasts, and premenopausal or perimenopausal women.
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Page 9
Chapter 8: Picture Archiving and Communication Systems
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Sample Questions
Q1) ____ refers to storage devices that must be retrieved by an individual and loaded into a drive for access to images.
A)Online storage
B)Nearline storage
C)Long-term storage
D)Offline storage
Q2) Which of the following offers the specification of strict requirements on the contents of the image header and the form of the pixel data itself for each type of modality, thereby improving interoperability?
A)ACR
B)DICOM
C)TCP/IP
D)COTS
Q3) Which of the following is another type of network based on TCP/IP and used within a single organization, such as the radiology department?
A)network security
B)Internet
C)bandwidth
D)intranet
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Chapter 9: Medical Imaging Informatics: An Overview
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Sample Questions
Q1) Hardware is the physical components used to process data and software is the computer programs that direct all hardware components to solve problems and thus derive useful practical solutions.
A)True
B)False
Q2) The major components of PACS include digital image acquisition modalities, a computer network database server, an archival system, and a soft-copy display
Q3) ____ involves the use of two major technologies, computer technology and communications technology, to solve problems in society.
A)CR
B)DM
C)DR
D)IT
Q4) The early interfaces in imaging informatics were known as point-to-point interfaces because they allowed two systems to ____________________ with each other.
Q5) A(n) ____________________ allows several devices to be connected together to utilize data and information.
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Chapter 10: Quality Control for Digital Radiography
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Sample Questions
Q1) The tendency to increase exposure by using higher technique factors than indicated on the technique guide for manual exams and by using plus density settings on AEC exams is an example of ____.
A)range-of-adjustment
B)overexposure
C)rescaling
D)exposure factor creep
Q2) Since a key aspect of QA is a visual inspection of the DR image, it is important to consider the capabilities of the QC workstation where we are making decisions.
A)True
B)False
Q3) A properly calibrated ____________________ indicator could be used to conduct periodic checks of the automatic exposure control (AEC).
Q4) The one test that can and should be done for every DR image is a(n) ____________________ assessment of image quality before release.
Q5) If the operator interface to the machine is extremely complex, ____________________ errors will increase exponentially.
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