RADT 3026 Exam 3

Continuous quality improvement (CQI) tends to focus on the people rather than the process

Documentation of non diagnostic images will be carried out primarily by the ___

The __ is often the weakest link in the digital imaging chain

Spatial frequency QUANTIFIES how close lines can be to each other and still be visibly resolved.

Which display station has the highest quality hardware, including the best monitor?

It is strongly recommended that a personal repeat rate log be kept by each technologist

Reduced irradiated water volume…

Four margins = ideal

In general, as mAs increases SNR __

The electric response to the exit beam that represents anatomy

Maintenance of equipment, image acquisition, & processing standards are QC issues that fit into the concept of __

Dynamic range (# of shades of gray), post processing, and SNR affect?

The range of values over which a system can respond

A compilation of health-related info concerning 1 individual that can be managed, and consulted across more than one org

Greater the dynamic range, the ___ the contrast resolution

The __ serves as the central hub that receives all images before they are released to the radiologists

What’s the controlling factor in CR and DR systems?

How the number can be given meaning

__ means how a process is done step by step

Which task group is responsible for acceptance testing and quality control for CR?

Most cross-sectional imaging is read on a __ square monitor

How to have high SNR

Incomplete erasure leads to __ images

What are advantages of a client/server-based system?

What general area defines digital image quality?

1ųGya is ~__days background exposure

The ability to distinguish many shades of gray from black and white

Which compression ratio is preferred?

The person trained to oversee the image viewing and storage system

Which task group is responsible for an exposure indicator for Digital Radiography?

The five luminance measurements should be within __ of one another.

All CR or DR systems have better contrast resolution than film/screen systems

This QC test may be performed by a designated tech, a radiation physicist, or by service personnel hired by HOSPITAL

If FOV remains the same, spatial resolution increases as matrix size __.

The base of the hierarchy and represent observations or symbols of differences in nature

Study this

There are four levels of data in medicine: which level is nonelectric data?

Clean & inspect IRs, Clean air intakes of imaging plate reader, Clean display screen, Clean keyboard & mouse: __ duties

In a __, the acquisition modalities send the images to a designated reading station and possibly to review stations

At low spatial frequencies, the MTF for DR is higher than that for screen-film mammography

Electronic response to anything other than the subject

Allows for visualization of a portion of the dynamic range

Which test pattern is this?

Minimum matrix size is

Reject analysis, Reject reasons, Positioning errors, Marker errors, Equipment malfunction errors: These are __ duties

Interoperability MUST be consistent

What are the advanced functions at the radiologist reading station?

Study this

QA activities are focused on __

With proper use of digital systems, patient dose can be reduced by ___

___ details the tests & reports to be done for PSP systems

To minimize errors, many hospitals allow only certain people the access to change demographics

To image a line pair you need __

Wide window width =

What are the disadvantages of distributed system?

__ DQE is preferred

Contrast-to-noise (CNR) and signal-to-noise (SNR) are the same thing

There are four levels of data in medicine: which level is unstructured viewable electronic data?

Which test pattern is this?

The technologist QC station generally has a __ monitor

The workstation processing speed tests must be done on the same day of the week and the same time

Spatial frequency is expressed in __.

The principal descriptor for contrast resolution is grayscale, more precisely called __

The term used to view images as if they are in a stack

What are the disadvantages of the client/server-based system?

What is the most popular type of monitor used in a radiology department?

Which task group is responsible for ongoing quality control in digital radiography?

Using multiple fields is IMPOSSIBLE with Digital Radiography systems

Which station is a step-down from the radiologist station & has the ability to view current & past reports w/ images?

Information that can be justified as being correct or true

These are the responsibilities of ___

Study

Spatial resolution and contrast resolution are the two most important characteristics of an imaging modality

There are four levels of data in medicine: which is computable electronic data that can be computed by other computers?

Objects with high spatial frequency are more difficult to image than those with low spatial frequency

Inappropriate beam configurations cause Histogram analysis errors

Two margins = OK if part of field covers cassette midline

What are the disadvantages of a web-based server?

A software designed to help clinicians make decisions

Would a 103 lpi or a 178 lpi grid be more likely to cause Moiré?

Based on detector exposure, under exposed rescales __

What eliminates signals outside collimation margins?

Based on detector exposure, overexposed rescales __

Which initial processing area is dependent on the other 2, and is the only one you actually see?

Which display station is used to review images after acquisition but before sending them to the radiologist?

Health care relies on ___

The ideal imaging system would have an MTF equal to __

Most digital projection images are read on at least a __ portrait monitor

Preventative maintenance (PM) typically takes place __

Promotes the adoption and meaningful use (MU) of health information technology (IT)

Determines where to set the value for black

Pixel size, frequency, and MTF affect?

What uses shape of image signal distribution to determine relevant info in exposure field and Exposure index?

What is this?

The human eye has a dynamic range of approximately __

What is the lowest acceptable compression?

___ has highest DQE and lowest patient dose

The ability of the system to accurately represent the imaged object

Dose creep is when you slowly increase __ to try to reduce repeats but actually overexpose patient

Which task group is responsible for acceptance testing and quality control for DI?

What is the first step in creating CR image?

High SNR=

Spatial resolution is more important than contrast resolution

The exposure index is derived from histogram

CR has a dynamic range of __

What’re the advantages of a web-based system?

This QC test may be performed by a designated tech, a radiation physicist, or by service personnel hired by VENDOR

The ACR suggests that QC tasks be performed at least __

What are the advanced functions of the Technologist QC control station?

A term used to describe the transmission of information

There are four levels of data in medicine: which is structured viewable electronic data that can’t be computed by others

Narrow window width =

Typical digital systems respond to exposures as low as 1ųGya and as high as 1mGya

The hardware and software infrastructure of a computer system

The use of knowledge to make sound, intelligent decisions

The __ is the first line of defense in preventing, recognizing, and reporting QC issues.

Whichever place matrix size is determined that has the lowest spatial resolution is what is displayed

The vendor applications personnel are usually on site for ___ during initial installation

No image can image an object smaller than the pixel

A single field is the __

Inspect & clean IRs, Inspect hinge and latch (CR), Erase imaging plates (CR), inspect laser printer: These are __ duties

CT and MRI systems generally have a __ dynamic range

What is a step for image evaluation?

A comprehensive set of activities designed to monitor and maintain systems that produce a product

Determines how many shades to show

A plan for the systematic observation & assessment of the different aspects of a facility to make sure standards are met

Legislation providing data privacy and security for medical information

__ allows radiologist to view images from multiple modalities and multiple vendors

People who are trained on all aspects of the system and are prepared to train others

Small fields…

What are the advantages of a distributed system?

Level of hierarchy that assigns meaning to data

The ability of an imaging system to resolve and render on the image a small high-contrast object

Small objects are harder to image than large objects

The number of gray shades that an imaging system can reproduce

What is this?

The matrix size is determined everywhere EXCEPT?

What is the most interactive part of a MIMPS?

Most QA activities will produce __ data

One hundred percent contrast is?

This QC test will generally be made by service personnel employed by the VENDOR

Which test pattern is this?

The spatial resolution of the eye is considered to be approximately ___.

In a __ , images are sent directly to the archive server after acquisition and are centrally located

What is the main area of Initial Processing?

System training is an important activity that must NEVER stop