Introduction to Radiologic Technology
Final Exam
Course Introduction
Introduction to Radiologic Technology provides students with a foundational understanding of the principles and practices central to the field of medical imaging. The course covers essential topics including the history and evolution of radiologic technology, basic anatomy and physiology as they relate to diagnostic imaging, and the roles and responsibilities of radiologic technologists. Students will explore radiation safety, ethical and legal considerations, patient care techniques, equipment operation, and quality control procedures. Emphasis is placed on developing critical thinking, communication, and professional skills necessary for success in both clinical and laboratory settings. This course prepares students for further study and clinical experience in radiologic sciences.
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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Chapter 1: Digital Radiography: An Overview
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Sample Questions
Q1) For radiography, which of the following is the highest of all the other imaging modalities, and can range from 5 -15 line pairs/mm?
A)spatial resolution
B)film-screen
C)contrast resolution
D)optical range
Answer: A
Q2) A high-end computer is the heart of the PACS system.
A)True
B)False
Answer: True
Q3) While the RIS and HIS handle essentially textual information, specifically dealing with business operations for the entire hospital, the PACS handle images generated by the various ____________________.
Answer: digital imaging modalities
Q4) A major drawback of CR systems is their limited ability to image detail, also known as ____________________.
Answer: spatial resolution
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Chapter 2: Digital Imaging Processing Concepts
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Sample Questions
Q1) There are several operations used in digital image processing to transform an output image into an input image to suit the needs of the human observer.
A)True
B)False
Answer: False
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) ____ is a process whereby the brightness levels obtained from sampling are assigned an integer (zero or a negative or positive number), called a gray level.
A)Quantization
B)Scanning
C)Digitizing
D)Resolution
Answer: A
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Chapter 3: Computed Radiography: Physics and Technology
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Sample Questions
Q1) In general, the greater the bit ____________________, the better the density resolution of the image.
Answer: depth
Q2) In the past, gas lasers such as a helium-neon (He-Ne) laser were used; however, current CR readers use solid-state laser diodes that emit a red laser beam having wavelengths of about 670-690 nm.
A)True
B)False Answer: True
Q3) To render the latent image visible, the PSP must be scanned by a laser beam of a specific wavelength.
A)True
B)False Answer: True
Q4) The smaller the ____________________ size, the better the spatial resolution of the image.
Answer: pixel
Q5) The digital detector used in CR imaging is the ____________________. Answer: imaging plate
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Chapter 4: Effective Use of Computed Radiography
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Sample Questions
Q1) If the exposure is >100% above the optimal signal level, the ALARA principle is violated, and the extra scatter generated will degrade the ____________________.
Q2) In order to visualize the____________________ structures of interest, some initial preprocessing must occur during imaging data extraction.
Q3) The exposure latitude of a digital detector is substantially lower than screen-film.
A)True
B)False
Q4) Currently, each major vendor uses a unique ____________________ indicator whose values indicate the exposure delivered to the plate.
Q5) 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
Q6) With CR, grid cutoff does not result in a light image, due to the automatic ____________________ of the image.
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6
Chapter 5: Flat-Panel Digital Radiography
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Sample Questions
Q1) The purpose of the a-Si photodiode layer is to convert the light from the X-ray detection ____________________ into electrical charges.
Q2) Optimization of the image displayed on monitors for viewing by both technologists and radiologists requires a good working knowledge of not only image processing but also display ____________________ principles and technology.
Q3) ____ refer(s) to the persistence of the image; charge is still being produced after the radiation beam from the X-ray tube has been turned off.
A)Image lag
B)Image artifacts
C)Image flaw
D)Image effect
Q4) Under random conditions it has been shown that the quantum efficiencies (based on the X-ray absorption properties of the detector converter materials) at 70 kV is about 67% for a-Se and 77% for CsI phosphor.
A)True
B)False
Q5) In imaging, the goal is to obtain good ____________________ information in the image.
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Chapter 6: Digital Fluoroscopy
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Sample Questions
Q1) Conventional fluoroscopy with an image intensifier operates in the low mA mode, and therefore the noise level is usually high.
A)True B)False
Q2) DSA has advanced from film-based imaging using image intensifier/video camera technology to imaging with dynamic FPDs.
A)True B)False
Q3) In the case of ____________________ scanning, 262.5 odd lines (one TV field) are first scanned, followed by 262.5 even lines (one TV field).
Q4) The image at the output screen of the image intensifier tube is far too small and too bright to be observed directly by a(n) ____________________.
Q5) The energy subtraction operation is based on subtraction of images taken at different ___________________.
Q6) The ____________________ ratio of an image intensifier tube is the ratio of the image brightness at the periphery to that at the center of the output screen.
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Page 8
Chapter 7: Digital Mammography
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Sample Questions
Q1) Which of the following algorithms enhances the sharpness of the borders of mass lesions, but may make even an indistinct mass appear more circumscribed?
A)peripheral equalization
B)Trex processing
C)unsharp masking
D)manual intensity windowing
Q2) ____ uses the principles of conventional tomography to produce tomographic images that are intended to enhance the conspicuity of lesions by blurring out structures above and below the layer of interest.
A)Digital tomosynthesis
B)CAD systems
C)Quantitation
D)Discriminant analysis
Q3) Film is processed using a chemical processor to render the latent image ____________________.
Q4) The ____________________ is central to a DM imaging system.
Q5) ____________________ finds unique features that can be readily distinguished reliably between a lesion and other normal anatomical structures.
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Chapter 8: Picture Archiving and Communication Systems
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Sample Questions
Q1) The purpose of IHE is to ensure that all digital imaging systems and information systems from different vendors can communicate with each other using communication standards to integrate all ____________________ clinical information for the purpose of viewing such information collectively.
Q2) These definitions imply that PACS is a digital radiology computer-based system or medical device where images acquired from a patient are displayed on monitors for viewing and subsequent digital image ____________________.
Q3) A(n) ____ is a computer-based system that processes data to produce information in a form that can be understood by people using the system in order to solve problems.
A)integration
B)workflow
C)information system
D)firewall
Q4) ____________________ communication involves two devices, one called a user and the other a provider.
Q5) To address this need, radiology departments have created a new job title, the PACS
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Chapter 9: Medical Imaging Informatics: An Overview
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Q1) The lack of a(n) ____________________ in radiology informatics prompted the Society of Imaging Informatics in Medicine (SIIM) to develop one.
Q2) The ____ initiative dates back to 1998 through a joint venture between the Radiological Society of North America (RSNA) and the HIMSS.
A)IHE
B)HIS
C)PACS
D)MIP
Q3) The terms health care information system and hospital information system both refer to a group of systems used within a hospital or enterprise that support and enhance ____________________.
Q4) ____ evolved as the technologies of digital image acquisition, image processing, image display, storage, and communications became widespread and commonplace.
A)Imaging informatics
B)IT security
C)Systems integration
D)Information systems
Q5) Data transmission requires some sort of ____________________ to do the task.
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Chapter 10: Quality Control for Digital Radiography
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Q1) ____ manufacturers have developed a variety of phantoms and automated tests to assist us in assessing performance on a periodic basis.
A)AT
B)QC
C)CR
D)DR
Q2) The period of ____________________ is important in deciding upon which indicators of changes in performance we are going to monitor routinely.
Q3) Each QC system has some sort of registration device that allows direct manual input of demographic and exam information.
A)True
B)False
Q4) A properly calibrated ____________________ indicator could be used to conduct periodic checks of the automatic exposure control (AEC).
Q5) As fewer x-rays are used to produce a DR image, the image appears less and less noisy.
A)True
B)False
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