Density may be defined as:

The Radiographic image is formed by:

The Primary controlling factors of density are:

Which of the following describes the relationship between mAs and density?

The number of electrons boiled off the cathode and consequently the number of x-rays produced are controlled by:

The law stating that any combinations of mA and time that produce the same mAs value will produce the same radiographic density is the:

The active portion of a CR IP is :

mAs directly controls:

Differences in densities on a radiograph describe:

The primary controlling factor of contrast is :

The relationship between kVp and density may be described as:

The 15% rule states that:

Which of the following sttements are true concerning the role of kVp in radiographical production?

1. As kVp is increased , penetrating ability of x-rays increases
2. 2.As kVp is increased, more x-rays exit the patient to strike the IR
3. 3.As kVp is decreased, wavelength and density decrease
4. 4. As kVp is increases, radiographic density increases
5. As kVp is decreases, radiographic density remains constant because mAs controls density.

Given an original technique of 30mAs and 80KVp, which of the following would produce a radiograph with double the density?

Which of the following governs the relationship between SID and density?

If SID is doubled , what may be said about radiographic density?

If SID is reduced by one-half, what must be done to mAs to maintain a constant density?

Poorer recorded detail may be caused by which of the following factors?

1.Long SID

2. Long OID

3. Large focal spot

4. Small focal spot

5. Patient motion

6. Magnification

In digital fluroscopy, what equipment should be used to view the image?

A primary advantage to digital fluroscopy is:

Which of the following describes the relationship between radiographic density and use of grids?

The use of filtration

As beam restriction increases(becomes tighter)

Which of the following affects radiographic density?

The variation of x-ray intensity along the longitudinal axis of the x-ray beam describes:

The thicker part of anatomy should be placed under which aspect of the x-ray tube?

The function of contrast is to:

A radiographer with few gray tones,primarily exhibiting black and white,would be described as having what type of contrast?

1. Long scale
2. 2. Short scale
3. Low
4. High

Poorer recorded detail may be caused by which of the following factors?

High kVp produces which of the following

1.High contrast

2.Long scale contrast

3.short scale contrast

4.Low contrast

5.Many gray tones

High kVp produces which of the following

1.High contrast

2. Few gray tones

3.Long scale contrast

4.short scale contrast

5.Low contrast

6.Many gray tones

More uniform penetration of anatomical structures occurs when what level of kVp is used?

Differential absorption of x-ray beam is a function of:

What effect does beam interaction have on contrast?

The adujustment in technical factors required when using beam restriction is:

What effect does the use of radiographic grids have on contrast?

As the amount of beam filtration is increased:

The portion of contrast that is caused by variations the anatomy or is secondary to pathological change is called

Recorded detail is

Better recorded detail may be caused by which of the following factors?

1.Long SID

2.Long OID

3.Short SID

4.Short OID

5.Large focal spot

6. Small focal spot

Optimal recorded detail may be created using which of the following factors?

TFT is

Distortion may be described as

Elongation and foreshortening are examples of:

Magnificatuion is caused by:

1.Short SID

2. Long SID

3. Short OID

4. Long OID

Distortion that occurs when the x-ray beam is angles against the long axis of a part is:

Distortion that occurs when the x-ray beam is angles along the long axis of a part is:

The actual patient dose as measured by a meter embeded in the collimator is:

Quality assurance and maintenance of CR cassettes includes erasing plates at least:

Quality assurance of digital imaging requires the uniformity of processing codes to ensure:

Quality assurance and maintainence of CR cassettes includeserasing plates at least

A software function that evens the brightnessdisplayed in the image field is called:

Beam – part receptor alignment latitude describes:

Exposure technique in digital imaging may be adjusted by:

Digital imaging is more sensitive to:

Inappropriate collimation causes

The apperance of images on technologists monitors is:

Digital imaging is driven by:

Digital systems operate at what speed class?

An artificial increase in display contrast at an edge of the image is:

As speed class increases:

As speed class decreases:

Smoothing software may result in:

Excessive processing of the digital image may:

A high SNR provides an image with:

Quantum noise limits ability to see:

If the exposure field is not accurately recognized,the histogram will contain data:

Grid ratio is defined as:

Grid frequency is defined as:

Which of the following statements concerning grids are true?

1. Contrast improvement factor is the measure of the ability of a grid to enhance contrast.
2. 2 Grid selectivity is the ratio of primary radiation transmitted through the grid to secondary radiation transmitted through the grid
3. 3. Grids are used when part thickness is less than 10cm
4. 4. GCF is the amount of increase in kVp necessary when converting from nongrid to grid technique
5. 5. The primary purpose of grid is radiation protection
6. 6.The main function of grid is to prevent compton scatter from reaching the film.
7. 7. Grids prevent the production of scatter

A grid with lead strips and aluminium interspacers that are angled to coincide with the divergence of the x-ray beam is calleda:

The range of SIDs that may be used with a focused grid is called:

The best scatter cleanup is achieved with the use of:

Grid cutoff may be described as:

When a nongrid technique using 10mAs and 75kVp is changed to a 12:1 grid using 75kvp, what new mAs must be used to maintain the same density as the original film?

Use of airgap technique?

Use of technique charts?

When AEc is used, increasing the kVp:

Materials that make flat panel detectors possible are:

Undesirable fluctuations in brightness are called:

The number of pixels making up the digital image is the:

The expression of image quality provide by a detector is called:

Which of the following terms describes the highest spatial frequency that can be recorded by a digital detector?

What converts light into a charge?

The smallest area represented in the digital image is the:

The number of pixels/mm in an image is called:

The space from the center of a pixel to the center of the adjacent pixel is called:

Mathematical code used to generate the digital image are called:

The process of assigning a value to each pixel to represent a gray tone is called:

A material that absorbs x-rays energy and emits part of that energy as visible light is called:

Bit depth is equal to:

Which of the following maintains image brightness over a wide range of exposure?

The available gray scale of an imaging system is determined by:

The smaller exposure change able to be captured by a detector is called:

An indicator of the dose level needed to acquire a optimal image is:

The usual image acquisition of an area of an image receptor is:

The smallest resolvable area in a digital imaging device is:

What allows more anatomical structures to be captured during an exposure?

The range of receptor exposures that provides a quality image is called:

Which of the following is a graphical representation of pixel values?