Quiz Bowl Quiz 2022 - 413

If an IR is underexposed or overexposed, it can still be displayed as acceptable. This is…

Effective energy of the beam is increased by increasing

Which of these fluoroscopy components will reduce exposure to the patient?

All of the following are essentially the same term except

Photoelectric absorption results in an ejected photoelectron and

If we increase distance, what do we need to do to mAs in order to maintain image density?

A device that measures the quantity of radiation that reaches the IR

When a electron interacts with the nuclear field of a tungsten atom, it creates

In digital imaging, as DEL size decreases

Which of the following combinations is most likely to be associated with quantum mottle?

All digital display monitors must be calibrated to the DICOM grayscale standard display function.

CCD technology is more expensive than CMOS.

Most heat generated at the target is a result of

In comparison with 60kv, 90kv will (choose 2)

Increasing the window level of an image will have what affect?

A continuous horizontal white line across a CR cassette would most likely indicate what?

Quantum mottle can be controlled by the radiographer

How efficiently a system converts the x-ray input signal into an output image is known as:

If SID is halved, the receptor exposure..

What effect will a LOW Signal to Noise Ratio have on the appearance of the digital image?

Inherent filtration,aka the tube window, is required to be of what alumium equivalence?

How does the input phosphor differ from the output phosphor of an image intensifier?

The voltage supplied to an x-ray unit from the power company may vary by as much as

High kVp should be associated with a short scale of contrast

Quality Control testing for electronic display resolution is commonly done by:

Decreasing the pixel bit depth will have what effect on the image?

Which of the following devices is prereading?

Resolution in CR increases as: (choose 2)

All of the following are associated with the anode, except...

What device spins at 10,000-12,000 rpm?

What is an LUT used for?

The Z number of Oxygen is 8. How many electrons occupy the outer shell?

X-ray intensity across the beam can vary as much as 45%, describes..

Focal spot and OID affect image sharpness in:

Quantity of radiation exiting the tube is affected by

300 mA was selected. What exposure time would produce 6 mAs?

The main difference between direct capture and indirect capture is that:

Which technique mimics the use of a grid?

What causes the heat build up at the anode?

Which system is responsible for tracking workflow and collecting radiology specific data?

Compared to film-screen systems, digital imaging has which of these? (choose 2)

What material is #2 made of?

The primary function of filtration is to reduce

Rotating anodes allow for electrons to interact with a larger target area, therefore heat is

What is the purpose of shuttering?

Dual-focus x-ray tubes have two

Stray radiation emitted through the tube housing is termed

Pixel pitch refers to the:

Which of the following systems is responsible for storing images?

Which of these will have the least exposure to the image receptor?

Which of the following works on the principle of self induction?

The term pixel is associated with all of the following except:

Which of these systems would produce images with the highest spatial resolution?

In digital imaging, as image matrix size increases:

The light emitted by the PSP is transformed into the image on the monitor by the

Uniform lines across a CR image (Moire) is most likely caused by what?

Less than 1% of electrons striking the anode change kinetic energy into

Which beam characteristic is reduced by adding aluminum filtration?

PACS is what allows communication between medical imaging equipment and computers.

Which waveform has the lowest precentage voltage ripple?

Decreasing the field size from 14x17 to 8x10 with no other changes, will

The high-voltage transformer _____ voltage while _____ current.

Imaging systems operate on 220 V of power. What adjusts incoming voltage to precisely this?

What should be done to increase the number of shades of gray on an image?

Which of these factors will INCREASE signal to a digital IR? (choose 2)

Brems interactions is best described by a/an

Which can be used as an indicator of the x-ray beam quality?

What target interaction involves the ejection of a k-shell electron?

Reduction in photon intensity as it passes through matter is

For the same FOV, spatial resolution will be improved using

How will an image appear when an isufficient amount of light is created during PSP image capture?

The ionization chamber is located______ in an AEC device

To improve the detail/sharpness of an image you could

There are 2 types of AEC, the ionizing chamber is located

Which of these is utilized in direct capture FPDs?

Which term is used to describe the intensity of the x-ray beam?

_________ detectors use a scintillator.

The average effective energy of a k-shell characteristic photon is

What primarily determines detail on a digital radiograph?

With a fixed kVp, an increase in pt thickness of 4-5 cm requires the mAs be increased by 2xs.

A representation of pixel values on a graph is called what?

How are wavelength and energy related?

Which refers to the radiation exiting the tube through the collimator?

Which advanced image manipulation function will allow the radiologist to view several different anatomic planes?

Where should the Image Intensifier be placed in fluoroscopy in order to reduce patient dose?

High-pass filtering is also known as:

A look-up table is used by the technologist to set appropriate kVp and mAs.

The smallest pixels would be seen in which of the following matrix sizes?

Grids help to control the production of scattered radiation

Quantum noise on an image is directly related to what?

A high atomic number increases the probability of

PACS is responsible for which of the following? (choose 2)

Which of the following statements about histograms is/are true?

Total filtration for a general purpose x-ray tube must be

Which of the following is associated with magnification fluoroscopy?

The relationship between the height of a grid's lead strips and the distance between them is:

Offset correction is used to remove inherent signal in a detector.

Why should a tech use a small focal spot when imaging extremities?

Which grid ratio results in the lowest dose to the patient, because less mAs is required?

Which of the following has the greatest impact on contrast in digital imaging?