PART A — CT IMAGE DISPLAY PARAMETERS

5-MARK SHORT QUESTIONS

Q1. What is meant by CT image display?

Answer

CT image display is the process of converting CT image information into a form that can be viewed and interpreted by the observer.

The important components include:

1. Display monitors
2. Cameras
3. Window and level settings
4. Different image-display and measurement functions
5. Advanced display functions such as histograms and multiplanar reformatting

The display system assigns different shades of gray to CT numbers/Hounsfield units.

Q2. What are display monitors used for in CT?

Answer

Display monitors are devices used to visualize CT images.

The slides mention:

1. Cathode-ray tube (CRT) monitors.
2. Flat-panel systems such as LCD monitors.
3. CRT monitors have historically been used in CT systems.
4. Newer LCD monitors provide improved image display.
5. LCD/flat-panel monitors can provide higher luminance and spatial resolution.

Q3. What is a camera in CT image display?

Answer

A camera is an output device that transfers the CT image from the computer to another medium.

According to the slides:

1. It transfers the image from the computer.
2. The image can be recorded or reproduced.
3. A film camera may be used for hard-copy images.
4. A camera is an output/display device.
5. Modern systems may use different display/output technologies.

WINDOWING

Q4. What is windowing in CT?

Answer

Windowing is the assignment of CT densities/pixel values to shades of gray according to clinical interest.

Its important features are:

1. It determines how CT numbers are displayed as shades of gray.
2. It improves visualization of tissues of interest.
3. It uses window width and window level.
4. It changes the display appearance without changing the original CT pixel values stored in memory.
5. Window settings can be automatically or manually controlled.

Q5. What is window width?

Answer

Window width (WW) determines the range/quantity of Hounsfield units represented by the gray scale.

1. It determines the range of CT numbers displayed.
2. A wide window represents a larger range of CT numbers.
3. A narrow window represents a smaller range.
4. A narrow window provides greater contrast between tissues within that range.
5. Values outside the selected range are displayed as black or white.

Remember:

Window Width = RANGE

Q6. What is window level?

Answer

Window level (WL) determines the center of the Hounsfield-unit range being displayed.

1. It selects the center of the window.
2. Values higher than the selected window range appear white.
3. Values lower than the selected range appear black.
4. Changing the level shifts the window along the HU scale.
5. It is selected according to the tissue/clinical structure being evaluated.

Remember:

Window Level = CENTER

Q7. Explain the relationship between window width and window level.

Answer

Window width and window level work together.

• Window width determines the range of CT numbers displayed.
• Window level determines the center of that range.

For example, if:

WW = 300 HU
WL = 0 HU

then the displayed range is:

−150 HU to +150 HU

Therefore:

Lower limit = WL − WW/2
Upper limit = WL + WW/2

Q8. What happens when window width is changed?

Answer

Changing window width changes the number of CT values assigned to the gray scale.

1. Narrow width → smaller HU range.
2. Narrow width → greater displayed contrast within that range.
3. Wide width → larger HU range.
4. Wide width → more CT values are represented.
5. The original CT data are not changed; only their display is changed.

Q9. What happens when window level is changed?

Answer

Changing window level moves the displayed HU range up or down.

1. WL is the center of the window.
2. Increasing WL shifts the window toward higher HU values.
3. Decreasing WL shifts it toward lower HU values.
4. Structures within the selected range become optimally displayed.
5. Values outside the range become black or white.

Q10. Give the typical CT window settings shown in the slides.

Answer

The slide gives the following examples:

High-yield point:
Soft-tissue windows are generally narrower, whereas bone/lung windows use wider ranges.

IMAGE DISPLAY OPTIONS

Q11. What is a Region of Interest (ROI)?

Answer

A Region of Interest (ROI) is an area of an image selected by the operator for analysis or measurement.

1. It is defined by the operator.
2. It may be circular, elliptical, square or rectangular.
3. A custom ROI may also be drawn.
4. ROI selection is the first step in many image-display and measurement functions.
5. It can be used to obtain information such as CT numbers and statistics.

Q12. What measurements can be performed using an ROI?

Answer

An ROI can be used to evaluate:

1. CT number/Hounsfield-unit values.
2. Mean CT value.
3. Minimum and maximum values.
4. Standard deviation.
5. Volume/area-related information depending on the software.
6. Histogram of CT numbers within the selected region.

Q13. What is distance measurement in CT image display?

Answer

Distance measurement is a software function that allows the operator to measure distances on a CT image.

1. The operator selects two points.
2. The software calculates the distance between them.
3. It can be used to measure anatomical structures.
4. It can help quantify abnormalities.
5. It is useful in reporting and image analysis.

Q14. What is the importance of image measurement for biopsy or drainage procedures?

Answer

Image measurements are important for planning procedures such as:

1. Biopsy needle placement
2. Drainage apparatus placement
3. Identification of the target lesion.
4. Estimation of the distance to the target.
5. Accurate procedural planning.

Q15. What information can be added using image annotation?

Answer

The software allows the operator to annotate images using:

1. Markers.
2. Arrows.
3. Lines.
4. Specific software markers.
5. Patient and examination information.

The slides also mention information such as patient name/identifier, date, slice number and thickness, pitch, table location, measurement scale, gray scale, right/left and other identifiers.

Q16. What is a reference image?

Answer

A reference image function displays corresponding locations in the slice being examined on another image.

Its uses include:

1. Showing the corresponding anatomical location.
2. Helping localize a lesion.
3. Relating axial images to other image planes.
4. Assisting anatomical orientation.
5. Improving interpretation of multiple CT sections.

Q17. What is image magnification?

Answer

Image magnification enlarges the displayed CT image.

Important point:

Image magnification is NOT the same as decreasing the display field of view.

The slide emphasizes that image magnification simply enlarges the displayed image and does not improve spatial resolution.

Q18. What is multiple image display?

Answer

Multiple image display allows several CT images to be displayed simultaneously.

According to the slide:

1. Four images per frame may be displayed.
2. The number of images per frame varies with the manufacturer.
3. It allows comparison of multiple sections.
4. It facilitates rapid image review.
5. It helps compare adjacent or different anatomical levels.

Q19. What is a histogram in CT image display?

Answer

A histogram is a graphical representation showing the appearance and frequency of a range of CT numbers within an ROI.

It can show:

1. Distribution of CT numbers.
2. Frequency of different CT values.
3. Mean CT value.
4. Standard deviation.
5. Minimum and maximum CT values.

Q20. What is Multiplanar Reformatting (MPR)?

Answer

Multiplanar reformatting (MPR) is an advanced CT display function.

1. It reformats CT data into different planes.
2. It can produce images in multiple anatomical planes.
3. It allows viewing of three-dimensional anatomical relationships.
4. It is useful for lesion localization.
5. It improves visualization of structures that may not be optimally demonstrated in the original plane.

Q21. What are advanced CT image display functions?

Answer

The slides identify advanced display functions such as:

1. Multiplanar reformatting (MPR)
2. Three-dimensional reformatting
3. Histogram analysis
4. Multiple image display
5. Other software-based image manipulation and measurement tools.

15-MARK LONG QUESTIONS — CT

LONG Q1. Explain window width and window level in CT image display.

Answer

CT images consist of pixels assigned numerical values expressed as Hounsfield units (HU). The display processor assigns these CT values to shades of gray.

1. Windowing

Windowing is the assignment of CT densities/pixel values to shades of gray according to clinical interest.

It allows the observer to optimize visualization of particular tissues.

2. Window Width

Window width determines the range of Hounsfield units displayed.

• Wide WW → broad range of HU.
• Narrow WW → narrow range of HU.
• Narrow windows provide greater contrast for tissues within the selected range.

3. Window Level

Window level determines the center of the displayed HU range.

• Increasing WL shifts the window toward higher HU.
• Decreasing WL shifts it toward lower HU.
• Values above the upper limit appear white.
• Values below the lower limit appear black.

4. Example

If:

WW = 300 HU
WL = 0 HU

Then:

Lower limit:

0 − 150 = −150 HU

Upper limit:

0 + 150 = +150 HU

Therefore, the displayed gray-scale range is:

−150 to +150 HU.

5. Clinical importance

Different anatomical regions require different window settings.

For example:

• Brain: 100/30
• Lung: 1500/−600
• Mediastinum: 350/50
• Bone: 1800/400

Thus, appropriate window width and level are essential for optimal CT image interpretation.

LONG Q2. Discuss CT image display options and their clinical applications.

Answer

CT image display systems provide several tools for viewing, measuring and analyzing CT images.

1. Region of Interest

An ROI is an operator-defined region that may be:

• Circular
• Elliptical
• Square
• Rectangular
• Custom shaped

It can be used to obtain CT-number measurements and other image statistics.

2. Distance measurement

The software measures the distance between selected points.

It is useful for:

• Lesion measurements
• Anatomical measurements
• Biopsy planning
• Drainage planning

3. Annotation

Images can be annotated using:

• Arrows
• Lines
• Markers

Patient and image information can also be displayed.

4. Reference image

The reference-image function identifies the corresponding anatomical location on another slice/image.

5. Image magnification

Magnification enlarges the displayed image.

It should not be confused with reducing display field of view and does not itself improve spatial resolution.

6. Multiple image display

Several images can be viewed simultaneously, allowing rapid comparison.

7. Histogram

A histogram demonstrates the frequency distribution of CT numbers within an ROI.

8. Advanced display functions

MPR and three-dimensional reformatting allow CT data to be viewed in different planes and provide improved anatomical visualization.

LONG Q3. Explain the different advanced image-analysis functions described in CT.

Answer

The CT display system provides several functions beyond simple image viewing.

ROI

Used to select an anatomical area for quantitative assessment.

Distance measurement

Measures anatomical distances and assists in lesion assessment and procedural planning.

Reference image

Shows corresponding anatomical locations on different images.

Magnification

Enlarges the image for viewing but does not improve spatial resolution.

Multiple image display

Allows multiple CT images to be displayed together for comparison.

Histogram

Provides graphical information about the frequency distribution of CT numbers in an ROI.

MPR

Multiplanar reformatting creates images in different anatomical planes from the CT dataset.

These functions allow CT images to be viewed, measured, compared and analyzed more effectively.

PART B — DICOM

5-MARK SHORT QUESTIONS

Q22. What is DICOM?

Answer

DICOM = Digital Imaging and Communications in Medicine.

It is:

1. A standard for communication and management of medical imaging information.
2. A software integration standard used in medical imaging.
3. A set of specifications and interfaces.
4. Used to transfer, store and display medical imaging information.
5. Designed to provide a diagnostically accurate representation of medical imaging data.

Q23. What is a DICOM file?

Answer

A DICOM file is an outcome of the DICOM standard.

It contains:

1. Medical image data.
2. Patient-related information.
3. Image-related information.
4. Acquisition/imaging information.
5. Structured data allowing images and associated information to remain together.

For example, a chest X-ray DICOM file can contain the patient ID together with the image.

Q24. What are the major functions of DICOM?

Answer

The slides describe five major functions:

1. Transmit and persist images and related data.
2. Query and retrieve files.
3. Perform specific actions such as printing or archiving.
4. Support digital imaging workflows.
5. Provide high-quality images for diagnosis.

Q25. What types of imaging equipment use DICOM?

Answer

DICOM information-object definitions can encode data from:

1. CT
2. MRI
3. Ultrasound
4. X-ray
5. Fluoroscopy
6. Angiography
7. Mammography

DICOM is also implemented in systems such as PACS, image viewers and display stations.

Q26. What are the advantages of DICOM?

Answer

Advantages include:

1. Image and patient details can be transferred together.
2. Improves patient safety by keeping images and data together.
3. Provides a consistent standard between devices.
4. Improves compatibility.
5. Stores acquisition and imaging protocol information.
6. Supports complete scanning and image review.

Q27. What is a disadvantage of DICOM?

Answer

The major disadvantage mentioned is related to data entry.

If optional fields are added but are not correctly completed:

1. DICOM image objects may become incomplete.
2. Missing information can cause problems elsewhere.
3. Data quality may be affected.
4. Incorrect metadata can interfere with image management.
5. Proper data entry is therefore important.

PART C — PACS

Q28. What is PACS?

Answer

PACS = Picture Archiving and Communication System.

It is a medical imaging technology that provides:

1. Economical image storage.
2. Convenient access to medical images.
3. Management of images from multiple modalities.
4. Digital transmission of images and reports.
5. Elimination of dependence on traditional film storage.

Q29. What does PACS stand for?

Answer

P — Picture: Digital medical image(s)

A — Archiving: Electronic storage of images

C — Communication: Routing, retrieval, sending and displaying images

S — System: Specialized computer network managing the system

Q30. What are the four main uses of PACS?

Answer

The slides identify four main uses:

1. Hard-copy replacement
2. Remote access
3. Electronic image integration platform
4. Radiology workflow management

Q31. What are the major components of PACS?

Answer

PACS consists of four major components:

1. Imaging modalities
   • CT
   • MRI
   • etc.
2. Secured network
   • Transmits patient information and images.
3. Workstations
   • Used for interpretation and review.
4. Archives
   • Store and retrieve images and reports.

Q32. What are the fundamental parts of PACS?

Answer

The fundamental parts are:

1. Image acquisition
2. Display workstations
3. Archive servers

Together, these provide image acquisition, interpretation/display and storage/retrieval.

Q33. What are the clinical benefits of PACS?

Answer

PACS provides:

1. Increased availability of images.
2. Multiple copies of the same image can be generated.
3. Image processing/manipulation.
4. No lost films.
5. Increased speed and quality of reporting.
6. Transmission between hospitals.
7. Reliability and ease of use.

Q34. What are the advantages of PACS?

Answer

1. Convenient search and retrieval of images.
2. Rapid electronic transfer within the hospital.
3. Easy consultation with outside specialists.
4. Simultaneous viewing at multiple locations.
5. Elimination of misplaced, damaged or missing films.
6. Improved efficiency of reporting using soft-copy images.

Q35. What are the disadvantages of PACS?

Answer

The slides mention:

1. High cost
2. Need for specialized personnel for installation and maintenance.
3. User training requirements.
4. Possibility of system breakdown.
5. Data security issues

15-MARK LONG QUESTION

LONG Q4. Explain DICOM in detail.

Answer

Definition

DICOM stands for Digital Imaging and Communications in Medicine.

It is a standard for the communication and management of medical imaging information and related data.

Purpose

DICOM provides specifications and interfaces for:

• Transfer
• Storage
• Display
• Management
• Communication of medical images

DICOM files

A DICOM file contains image information together with associated patient and imaging data.

For example, patient ID can be stored together with a chest X-ray image.

This reduces the risk of separating the image from its identifying information.

Equipment

DICOM supports:

• CT
• MRI
• Ultrasound
• X-ray
• Fluoroscopy
• Angiography
• Mammography

It is also used by PACS, image viewers and display stations.

Functions

The five main functions are:

1. Transmit and persist images and related data.
2. Query and retrieve files.
3. Perform actions such as printing and archiving.
4. Support digital imaging workflows.
5. Provide high-quality diagnostic images.

Advantages

• Image and patient information travel together.
• Improved patient safety.
• Better compatibility between devices.
• Standardized communication.
• Storage of acquisition/imaging protocol information.
• Supports scanning and image review.

Disadvantage

Incorrect or incomplete entry of optional fields can make image objects incomplete and create problems elsewhere.

LONG Q5. Explain PACS, its components, uses, advantages and disadvantages.

Answer

Definition

PACS stands for Picture Archiving and Communication System.

It is a medical imaging technology providing economical storage and convenient access to images from multiple imaging modalities.

Meaning of PACS

P — Picture: Digital medical images.

A — Archiving: Electronic storage.

C — Communication: Sending, routing, retrieval and display.

S — System: Computer network managing the complete system.

Modalities

PACS can manage images from:

• CT
• MRI
• Ultrasound
• Plain X-rays
• Other imaging systems

Components

Four major components are:

1. Imaging modalities.
2. Secured network.
3. Workstations.
4. Archives.

Main uses

1. Hard-copy replacement.
2. Remote access.
3. Electronic image integration.
4. Radiology workflow management.

Advantages

• Convenient retrieval.
• Rapid electronic transfer.
• Remote specialist consultation.
• Simultaneous viewing.
• No misplaced films.
• Improved reporting efficiency.

Disadvantages

• Cost.
• Specialized maintenance personnel.
• Training requirements.
• System breakdown.
• Data-security issues.

PART D — CLINICAL DECISION SUPPORT SYSTEM (CDSS)

5-MARK QUESTIONS

Q36. What is a Clinical Decision Support System?

Answer

A Clinical Decision Support System (CDSS) is an application that analyzes patient data to help healthcare providers make decisions and improve patient care.

It:

1. Analyzes patient data.
2. Provides clinical advice.
3. Assists healthcare practitioners.
4. Uses knowledge management or computational methods.
5. Helps formulate better-informed clinical decisions.

Q37. What information can CDSS provide?

Answer

CDSS can provide:

1. Patient-specific information.
2. Patient history.
3. Alerts.
4. Reminders.
5. Discharge summaries.
6. Other tools that assist clinical decision-making.

Q38. What are the two types of CDSS?

Answer

The two major types are:

1. Knowledge-based CDSS
2. Non-knowledge-based CDSS

Q39. Explain knowledge-based CDSS.

Answer

A knowledge-based CDSS:

1. Uses a knowledge base.
2. Applies programmed rules to patient data.
3. Uses an inference engine.
4. Produces an output/action.
5. Uses a communication mechanism to present the result to the user.

The rules are commonly expressed as IF–THEN statements.

Example:

IF drug X is taken AND drug Y is taken → THEN alert the user.

Q40. What are the components of knowledge-based CDSS?

Answer

The system contains:

1. Knowledge base
2. Inference engine
3. Communication mechanism

The knowledge base contains rules.

The inference engine applies the rules to patient data.

The communication mechanism presents the result to the healthcare professional.

Q41. What is non-knowledge-based CDSS?

Answer

Non-knowledge-based CDSS does not use a traditional knowledge base.

Instead, it uses:

1. Artificial intelligence.
2. Machine learning.
3. Statistical pattern recognition.
4. Patient data.
5. Algorithms that identify patterns.

These systems are often called black boxes because their internal decision-making may not be easily understood by human inspection.

Q42. Differentiate knowledge-based and non-knowledge-based CDSS.

Answer

Q43. What are the advantages of CDSS?

Answer

CDSS can:

1. Minimize medication errors.
2. Lower the risk of misdiagnosis.
3. Improve healthcare practitioner efficiency.
4. Improve quality of healthcare services.
5. Improve quality of care and health outcomes.
6. Help avoid errors and adverse events.
7. Improve provider and patient satisfaction.

Q44. What are the disadvantages of CDSS?

Answer

1. Not all alerts are necessarily correct.
2. Excessive alerts can produce alert fatigue.
3. Low-value prompts may occur.
4. Incorrect implementation can fail to identify medication errors.
5. Poorly functioning systems may therefore introduce risks.

Q45. What is the purpose of CDSS?

Answer

The purpose is to:

1. Assist healthcare providers.
2. Analyze patient data.
3. Support diagnosis.
4. Improve patient care.
5. Improve clinical documentation.
6. Support coding, procedure/test ordering and patient triage.
7. Reduce unnecessary testing and improve efficiency.

Q46. Give examples of CDSS.

Answer

The slides list:

• First Databank
• Medi-Span
• Allscripts
• Cerner
• Elsevier

15-MARK LONG QUESTION

LONG Q6. Explain Clinical Decision Support Systems, their types, components, advantages and disadvantages.

Answer

Definition

CDSS is an application that analyzes patient data to assist healthcare providers in making clinical decisions and improving patient care.

Purpose

CDSS helps clinicians:

• Analyze patient records.
• Formulate diagnoses.
• Receive clinical advice.
• Improve quality of care.
• Improve clinical documentation.
• Support coding and ordering.
• Assist patient triage.

Types

1. Knowledge-based CDSS

Uses:

• Knowledge base
• Rules
• Inference engine
• Communication mechanism

Rules are often written as IF–THEN statements.

Example:

IF drug X + drug Y → THEN alert clinician.

2. Non-knowledge-based CDSS

Uses:

• Artificial intelligence
• Machine learning
• Statistical pattern recognition

It learns patterns from clinical data rather than relying entirely on explicitly programmed medical rules.

Advantages

• Reduces medication errors.
• May reduce misdiagnosis.
• Improves efficiency.
• Improves healthcare quality.
• Improves health outcomes.
• Reduces adverse events.
• Can improve satisfaction.

Disadvantages

• Incorrect alerts.
• Alert fatigue.
• Low-value prompts.
• Potential medication-error detection failures.
• Reliability/accountability concerns with black-box systems.

PART E — TERMINOLOGY MANAGEMENT SYSTEM (TMS)

5-MARK QUESTIONS

Q47. What is terminology?

Answer

Terminology is the language used to describe a specific thing or the specialized language used within a particular field.

For example, scientists use specialized scientific terminology.

Q48. What is terminology management?

Answer

Terminology management is a set of activities that ensures that correct terms are used consistently.

It includes:

1. Collecting terminology.
2. Developing terminology.
3. Storing terminology.
4. Reviewing terminology.
5. Harmonizing terminology.
6. Updating terminology.
7. Distributing terminology data.

Q49. What is a Terminology Management System?

Answer

A Terminology Management System (TMS) is software designed to:

1. Collect terminology data.
2. Maintain terminology data.
3. Store terminology.
4. Access terminology.
5. Support consistent use of terms.

It can be used by translators, terminologists, technical writers and other users.

Q50. What is a termbase?

Answer

A termbase is a terminology database in which terminology data are stored.

It can contain:

1. Source-language terms.
2. Source-language definitions.
3. Grammatical information.
4. Target-language terms.
5. Target-language definitions.

A terminologist manages the terminology database.

Q51. What are the benefits of TMS?

Answer

Benefits include:

1. High-quality translations.
2. Efficient communication in multilingual organizations.
3. Automated glossary creation.
4. Customized terminology solutions.
5. Retrieval of appropriate information with less noise.
6. Increased customer satisfaction.

Q52. What information is recorded in a termbase?

Answer

The slide lists:

1. Term in source language.
2. Definition in source language.
3. Grammatical information.
4. Term in target language.
5. Definition in target language.

Q53. Name tools used in terminology management.

Answer

The slides list:

• crossTerm
• MemoQ
• qTerm
• SDL MultiTerm
• TermWeb
• TermWiki Pro

 15-MARK LONG QUESTION

LONG Q7. Explain Terminology Management Systems and their importance.

Answer

Definition of terminology

Terminology is specialized language used to describe concepts within a specific field.

Terminology management

Terminology management ensures that correct terms are used consistently.

Activities include:

• Collection
• Development
• Storage
• Review
• Harmonization
• Updating
• Distribution

TMS

A Terminology Management System is software used to collect, maintain and access terminology data.

Termbase

Terminology data are stored in a terminology database called a termbase.

Information includes:

• Source-language term.
• Source definition.
• Grammatical information.
• Target-language term.
• Target definition.

Benefits

TMS provides:

1. Higher-quality translations.
2. Better communication.
3. Automated glossary creation.
4. Customized terminology solutions.
5. Better information retrieval.
6. Increased customer satisfaction.

Applications

TMS is useful for:

• Translation projects.
• Multilingual organizations.
• Terminography.
• Term extraction.
• Term analysis.

PART F — COMPUTER-AIDED TRANSLATION (CAT)

5-MARK QUESTIONS

Q54. What is Computer-Aided Translation?

Answer

Computer-Aided Translation (CAT) refers to software used to assist a human translator.

It is also called:

• Machine-assisted translation (MAT)
• Machine-aided human translation (MAHT)

Important points:

1. The translation is created by a human.
2. Software facilitates parts of the translation process.
3. CAT tools support submitting, editing, managing and storing translations.
4. Text is divided into smaller segments.
5. Translations are stored in a translation memory.

Q55. How does a CAT tool work?

Answer

A CAT tool:

1. Receives the source text.
2. Extracts translatable content.
3. Divides the text into translation units/segments.
4. Displays source and target fields side by side.
5. The translator enters the translation.
6. The source and translation are stored together in translation memory.
7. Previous translations can be reused.

Q56. What is translation memory?

Answer

Translation memory is a database containing pairs of:

Source text + corresponding translation

Its advantages are:

1. Previous translations can be reused.
2. Repetitive content can be translated faster.
3. Translation consistency improves.
4. Productivity increases.
5. The more content translated, the more matches become available.

Q57. What are common features of modern CAT tools?

Answer

The slides identify:

1. Translation memory
2. Term base/translation glossary
3. Real-time collaborative teamwork
4. Quality assurance functionality

Q58. What are the advantages of CAT tools?

Answer

According to the slides:

1. Save time.
2. Allow large texts to be processed quickly.
3. Convenient for repetitive text.
4. Useful for specialized subject areas.
5. Can support translation into multiple languages.
6. Improve consistency and productivity.

Q59. What are the disadvantages/problems of CAT tools?

Answer

The slides mention:

1. Accuracy can be a problem.
2. Software may provide literal/word-for-word translations.
3. It may fail to understand context.
4. It may fail to resolve ambiguity.
5. Confidentiality may be an issue when sensitive information is entered into web-based tools.
6. Translation errors can range from minor to serious or safety-critical.

 15-MARK LONG QUESTION

LONG Q8. Explain Computer-Aided Translation, its working, features, advantages and disadvantages.

Answer

Definition

Computer-Aided Translation (CAT) is the use of software to assist a human translator in translating text.

The translation remains a human-created translation, while software facilitates different stages of the process.

Working

The CAT tool:

1. Opens the source document.
2. Extracts translatable content.
3. Removes/non-displays non-translatable elements such as images.
4. Divides the text into translation units.
5. Displays source and target fields side by side.
6. The translator enters the target-language translation.
7. Source and translated segments are saved together.
8. The pair is stored in translation memory.
9. Previous translations can later be reused.

Common features

• Translation memory.
• Termbase.
• Collaborative teamwork.
• Quality assurance.

Advantages

• Saves time.
• Improves productivity.
• Handles repetitive text efficiently.
• Supports consistency.
• Can reduce time and effort.
• Can produce cost savings.

Disadvantages

• Accuracy problems.
• Literal translation.
• Poor handling of context.
• Difficulty with ambiguity.
• Confidentiality concerns.
• Potential translation errors.

 INTEGRATED LONG QUESTION: DICOM + PACS

LONG Q9. Explain DICOM and PACS and discuss their relationship in medical imaging.

Answer

DICOM

DICOM stands for Digital Imaging and Communications in Medicine.

It provides a standard for:

• Medical image communication.
• Image storage.
• Image retrieval.
• Image display.
• Associated patient/imaging data.
• Digital imaging workflow.

DICOM supports modalities such as CT, MRI, ultrasound, X-ray, fluoroscopy, angiography and mammography.

PACS

PACS stands for Picture Archiving and Communication System.

It provides:

• Image storage.
• Image retrieval.
• Image communication.
• Image viewing.
• Workflow management.

Relationship

DICOM provides the standardized format and communication framework, while PACS provides the system/environment for storing, retrieving, transmitting and viewing medical images.

PACS components

1. Imaging modalities.
2. Secure network.
3. Workstations.
4. Archives.

Advantages

• Rapid image transfer.
• Remote access.
• Multiple-location viewing.
• Elimination of lost films.
• Better reporting efficiency.
• Integration of imaging information.

MOST IMPORTANT 5-MARK QUESTIONS

CT

1. What is windowing?
2. Define window width.
3. Define window level.
4. Differentiate window width and window level.
5. Give typical CT window settings.
6. What is ROI?
7. What is histogram?
8. What is MPR?
9. What is image magnification?
10. What is reference image?
11. What is multiple image display?
12. What are advanced CT display functions?

DICOM

13. Define DICOM.
14. What are the five main DICOM functions?
15. What is a DICOM file?
16. What equipment uses DICOM?
17. Advantages of DICOM.
18. Disadvantage of DICOM.

PACS

19. Define PACS.
20. Explain P-A-C-S.
21. Four main uses of PACS.
22. Components of PACS.
23. Fundamental parts of PACS.
24. Clinical benefits of PACS.
25. Advantages of PACS.
26. Disadvantages of PACS.

CDSS

27. Define CDSS.
28. Types of CDSS.
29. Knowledge-based CDSS.
30. Non-knowledge-based CDSS.
31. Components of knowledge-based CDSS.
32. Advantages of CDSS.
33. Disadvantages of CDSS.
34. Purpose of CDSS.
35. Examples of CDSS.

TMS

36. Define terminology.
37. What is terminology management?
38. Define TMS.
39. What is a termbase?
40. Benefits of TMS.
41. Information recorded in a termbase.
42. Tools of TMS.

CAT

43. Define CAT.
44. How does CAT work?
45. What is translation memory?
46. Features of CAT tools.
47. Advantages of CAT.
48. Disadvantages of CAT.

 MOST PROBABLE / HIGH-YIELD 15-MARK QUESTIONS

1.

Explain window width and window level in CT image display, with examples and typical clinical window settings.

 2.

Discuss CT image display options and their clinical applications.

 3.

Explain DICOM, its functions, applications, advantages and disadvantages.

 4.

Explain PACS, its components, uses, advantages and disadvantages.

 5.

Explain the relationship between DICOM and PACS in medical imaging.

 6.

Explain Clinical Decision Support Systems, their types, components, advantages and disadvantages.

 7.

Explain Terminology Management Systems, termbases, benefits and applications.

 8.

Explain Computer-Aided Translation, its working, translation memory, advantages and disadvantages.

 TWO-DAY MEMORIZATION STRATEGY

For example:

Windowing

Remember:

Windowing → Width + Level

Then:

Width = RANGE
Level = CENTER

Then remember the example:

300 width + 0 level → −150 to +150 HU

That’s much easier than memorizing a paragraph.

DICOM

Remember:

DICOM = Standard

Then:

Transmit → Retrieve → Action → Workflow → Diagnosis

PACS

Remember:

P = Picture
A = Archiving
C = Communication
S = System

Then:

Modalities → Network → Workstation → Archive

CDSS

Remember:

Two types → Knowledge-based + Non-knowledge-based

Knowledge-based:

Knowledge base → Inference engine → Communication

Non-knowledge-based:

AI → Machine Learning → Pattern Recognition

TMS

Remember:

Terminology → Management → Termbase → Benefits

Termbase:

Source term → Source definition → Grammar → Target term → Target definition

CAT

Remember:

Source → Segments → Translation → Translation Memory → Reuse

YOUR BEST EXAM STRATEGY

First priority — 15 marks

Memorize these 8 long answers:

1. CT window width/level
2. CT image display options
3. DICOM
4. PACS
5. DICOM + PACS relationship
6. CDSS
7. TMS
8. CAT

Second priority — 5 marks

Learn the short questions as definitions + 4–5 bullet points.

Third priority — tables/numbers

Especially memorize:

CT

• WW/WL concepts
• Brain: 100/30
• Lung: 1500/−600
• Mediastinum: 350/50
• Bone: 1800/400
• WW 300 + WL 0 → −150 to +150

DICOM

• 5 main functions

PACS

• 4 main uses
• 4 major components

CDSS

• 2 types
• 3 components of knowledge-based CDSS

TMS

• 5 types of information in a termbase

CAT

• Translation memory + termbase + collaboration + QA