Practical Imaging Informatics Flashcards

Describe the advantages of a PACS archive with ''native'' support Forenterprise image distribution.

Answer: Able to deliver via the web client all images that reside within the PACS archive the enterprise user can be given a complete, comprehensive view of the patient's medical image history with some vendors, the enterprise user also shares a common view with respect to annotations, presentation states, etc.

This choice highlights the primary advantages of a PACS with native support for enterprise image distribution. It ensures seamless delivery of images via web clients, eliminating the need for prefetching or persistent storage logic. Users have a comprehensive view of the patient's medical image history, and shared annotations and presentation states enhance collaboration and diagnostic accuracy.

Tissue characteristics exploited by MRI to manipulate tissue contrast:

Answer: T1- T2,Proton density, Blood flow, Perfusion- Diffusion

These are the primary characteristics used in MRI to create contrast between different types of tissues. T1 and T2 refer to relaxation times, proton density refers to the concentration of hydrogen protons, blood flow can be visualized with specific techniques, perfusion measures the flow of blood to tissues, and diffusion measures the movement of water molecules within tissues.

What are the components located in a CT gantry?

Answer: High power X-ray tube- Collimators- Linear array of detectors

These are the main components of a CT gantry. The high power X-ray tube generates the X-rays needed for imaging, collimators shape and control the X-ray beam, and the linear array of detectors captures the X-rays after they pass through the patient, converting them into data for image reconstruction.

The image matrix size of a computed tomography image is?

Answer: 512 x 512 x 12 bits

This option indicates a high-resolution image matrix with 512 rows and 512 columns, each pixel encoded with 12 bits.This is the standard matrix size and bit depth for CT images, allowing for high-quality, detailed images.

hardware extensions that allow humans (or other devices) to interact with a computer:

Answer: Input/output devices

Input/output (I/O) devices are hardware extensions that enable humans or other devices to interact with a computer.devices facilitate the input of data to the computer and the output of data from the computer.

Any component of the image that is extraneous to the representation of tissue structures, can be caused by a technique, technology, hardware, or software error.

Answer: Artifact

An artifact in medical imaging refers to any distortion or error in the image that is extraneous to the actual representation of the tissue structures.Artifacts can arise from various sources including patient movement, technical issues with the imaging equipment, or software processing errors.

What is the source in projection radiography?

Answer: X-rays; ionizing radiation; part of the electromagnetic spectrum emitted as a result of bombardment of a tungsten anode by free electrons from a cathode.

In projection radiography, the source is X-rays, which are a form of ionizing radiation. These X-rays are produced when free electrons emitted from a cathode strike a tungsten anode.This interaction results in the emission of X-rays, which pass through the body to create an image based on the varying densities of tissues.

When shopping for a new healthcare information system, what is the most important document for which to ask?

Answer: IHE integration statement

The IHE (Integrating the Healthcare Enterprise) integration statement indicates that the system complies with IHE profiles, ensuring interoperability with other systems.This document is important but typically follows after ensuring basic compatibility and standards compliance.

How do reconstruction filters define/emphasis image contrast?

Answer: Distinguish between "soft tissue" vs. spatial resolution ("bone or detail") filter

Reconstruction filters in imaging modalities like CT are designed to enhance specific image characteristics.Filters can be tailored to emphasize soft tissue contrast or spatial resolution to visualize bone or fine detail.The choice of filter affects the overall appearance and diagnostic quality of the reconstructed images.

How is memory different than a CPU (central processing unit)?

Answer: Locate exams- Track studies- Provide images to patients and physicians requesting access- Ensure all data necessary for the accurate interpretation of an exam are provided for the radiologist

This describes the functions of a Picture Archiving and Communication System (PACS), which is used for managing medical images, not the difference between memory and CPU.

What surface in the reading room has the greatest influence on sound transmission?

Answer: The ceiling

The ceiling's material and design greatly affect sound transmission within a room. Sound waves can bounce off or be absorbed by the ceiling, influencing the overall acoustics of the space.A hard, smooth ceiling can reflect sound, while a soft or textured ceiling can absorb sound, reducing echoes and reverberations. Additionally, the height and shape of the ceiling can impact how sound travels within the room.