Which of the following projections results in a "natural" air gap

Which of the following are true about the Air Gap Technique? (select all that apply)

The number of bits per pixel, which identifies grayscale values

A bit is a unit of digital information. It takes ___# of bits to create a byte

A bit is considered the smallest unit of computer data

Number of pixels in an XY direction making up a digital image

In many cases, digital fluoroscopy eliminates which of the following?

In digital fluoroscopy, the image must be turned into digital form by what device?

What is atomic mass?

The law stating that the outer shell of an atom can contain no more than eight electrons is called

As distance decreases, the intensity of the x-ray beam

Types of particulate radiation (select all that apply)

Self-induction is used in the operation of what device?

Electricity is supplied to the imaging department by

The electricity provided to the radiology department operates at

A variable transformer that is used to select kVp for the Xray circuit is the

Mathematical codes used to generate the digital image are called?

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

The best scatter cleanup is achieved with the use of

In digital radiography, inappropriate collimation causes

To reduce patient dose, exposure technique in digital imaging should be adjusted by

What organization mandates a quality control program

The collimator/light field to radiation field alignment must be accurate to within __% of the SID

The Effective focal spot size should be within ___% of the size state in the equipment specification

The kVp must be accurate to within __% of the kVp indicated

Exposure linearity: Adjacent mA stations should be within ___% of one another

The fluoroscopy exposure rate: Tested with a digital dosimeter; dose should not be more than ___mGy per minute

The range of exposures that may be captured by a dector

A CR plate should be erased at least every

How often should a CR reader be calibrated?

Histogram of pixel values from image acquisition that can be used to correct or enhance luminance values

As window level increases, image brightness ____

As window width narrows, contrast ____?

Vertical or horizontal lines across a CR image may be due to?

A light area on an CR image may be caused by?

Incorrectly oriented grides may cause ____on the image.

Occupational Exposure: Annual effective dose limit

Occupational exposure: Lens of the eye

Occupational Exposure: Annual equivalent dose for skin, hands, & feet

Students older than the age of 18- Annual effective dose limit

General public - Annual effective dose limit for frequent exposure

Level of negligible risk

Who publishes the annual dose limits?

Effective dose limit for the embryo or fetus for all of gestation

Embryo-fetus- equivalent dose limit per month

Can randomly occur in nature

Become more severe at high levels of radiation but do not occur below a certain threshold dose

A lead apron of at least ___mm lead equivalent must be worn during exposure to scatter radiation

If the exposure is 5 mGy at a distance of 3 feet, stepping back to a distance of 6 feet causes the exposure to decrease to?

Fixed Fluoroscopes must maintain a minimum of ___inches Source to tabletop

In portable radiography, the source to skin distance must be a minimum of

The fluoroscopy timer must sound an alarm after ___ mins of beam-on time

Which of the following is known as coherent scattering?

Which of the following is responsible for creating the conditions for contrast on the image

Which of the following produces scatter radiation that exits the patient and may fog the image?

Which of the following primarily involves loosely bound outer-shell electrons?

Which of the following may result in occupational exposure for a radiographer?

which of the following sets of exposure factors would result in the lowest dose to the patient

Lead aprons used in fluoroscopy must be at least

The lowest intensity of scatter radiation from the patient is located

Dropping a CR Cassette could cause (select all that apply)

All of the following are parts of the Image Intensifier (select all that apply)

Changing alternating current to direct current

With changes in SID, the _____ is used to calculate a new mAs