Unit 1 Post Exam Questions

Each digital image is two dimensional and is formed by a matrix of:

pixels

Situation: A patient is lying on her back on the X-ray table facing the X-ray tube (supine). The right side of the body is then turned 20 degrees toward the image receptor and a positioning wedge is placed under the left side of her body elevating her left side away from the image receptor. What is this radiographic position?

RPO

Situation: A trauma patient enters the emergency room with a piece of wire in the palm of the hand which is protruding about 3'“ out of the palmar surface of the hand. What is the minimum number of projections required to be taken for this radiographic study?

Two? Three?

A standard that ensures that all digital imaging equipment can communicate with each other is referred to as:

DICOM and HL7

A longitudinal plane that divides the body into equal anterior and posterior parts is the:

midcoronal plane

The study of joints is termed:

arthrology

The radiographer has the responsibility of communicating with the patient to obtain pertinent clinical information

True

PA or AP oblique projection images are displayed on a monitor with the patients right side of the body at the viewers right side

False

What is the term describing the energy/penetrating power of the X-ray photon in digital imaging?

kilovoltage

Which of the following is not one of the cardinal principles of radiation protection?

Filtration

The acronym, PACS, refers to Picture Archiving Connection System

False

Th opposite term for supination is:

pronation

The vertical plane that divides the body into equal right and left halves describes the:

medican or midsaggital plane

When considering technique for an exam, the ____ kv and the __ mAs that will produce a diagnostic images should be used on every examination

lowest; lowest

Situation: A radiograph of the abdomen demonstrates involuntary motion due to bowel peristalsis (involuntary contractions). Which of the following factors will best eliminate this problem during the repeat exposure?

Decrease exposure time

Which of the following patient does categories carries the highest numerical value of all doses?

Entrance skin exposure

The ability of a digital imaging system to distinguish between similar tissues (differences in brightness between light and dark areas of image) is the definition for:

contrast resolution

A random disturbance that obscures or reduces clarity is termed:

noise

What is the metric equivalent of a 14×17 field size?

35×43 cm

Besides the anatomic side marker, what is other required marker to be on all images?

patient identification and date

Which of the following joints is not a synovial joint?

Skull suture

Which of the following positions is often used to insert a rectal enema tip before a barium enema study?

Modified Sims’

The acronym ALARA stands for:

As Low As Reasonably Achievable

Which of the following bones in classified as a long bone?

Humerus

A lateromedial projection is where the lateral aspect of the anatomical part is closet to the image receptor (IR).

False

A position in which the head is lower than the feet is:

Trendelenburg

How many separate bones are found in the adult human body?

206

According to the ARRT Code of Ethics, a radiologic technologist may render a diagnosis during a radiographic examination if requested by the patient.

False

The number of X-ray photons that strike the digital detector can be classified as:

signal

Which of the following is a secondary growth center for endochrondral ossification?

Epiphyses

Which of the following terms describes the sole or inferior aspect of the foot?

Plantar

An upright position with the arms abducted, plans forward, and head forward describes the:

anatomic position

The intensity of light that represents the individual pixels in the image on the monitor defines:

brightness

Exposure time is usually expressed in units of

milliseconds

The radiographic term projection is defined as:

path or direction of the central ray

Which SI unit of radiation measurement is used to describe exposure recorded on a dosimeter/film badge (your exposure as a student radiographer/occupational worker)?

Sievert

Which term describes lying down in any position?

recumbent

Which of the following is not one of the 3 types of touch appropriate in medical imaging?

massage

The numeric value that is representative of the exposure that the IR has received in digital imaging is called the:

exposure indicator

The greater the bit depth of a digital system, the greater the:

contrast resolution

What is the name of the small oval-shaped bones found in tendons?

Sesamoid bones

A deviation Index (DI) of zero indicates no radiation has reached the digital image receptor.

False

Of the following factors, which will most affect radiographic spatial resolution?

Focal spot size

The ___ provides feedback tot he technologist regrading image receptor exposure with ranges from -3 to +3 on most systems.

deviation index

What is the primary center for bone growth termed?

Diaphysis

What is the annual whole body effective dose (ED) for a technologist?

5 rem (50 mSv)

According to the ARRT Code of Ethics, radiologic technologists must participate in continuing education activities throughout their professional career.

True

The term “portrait” describes and image receptor orientation that is aligned ___ to the anatomy

lengthwise

Which of the following radiographic studies would best benefit by applying the anode heel effect?

Thoracic spine

What is the main purpose of a grid in image acquisition?

control scatter radiation

What is the primary controlling factor for radiographic contrast?

mAs

Which SI unit of radiation measurement describes patient dose?

Gray

Increasing the SID will increase distortion of anatomy

False

The four image quality factors of a radiograph

• contrast

• resolution/detail

• distortion

• density

The range of exposure over which an imaging system produces an acceptable image is the:

exposure latitude

It is legally acceptable to type “right or left” on a radiograph if the anatomic side marker is not visible.

False

Which of the following body systems helps to regulate body temperature?

Circulatory? Nervous?

A low SNR is desirable in digital imaging for better image quality.

False

The functional term for a freely movable joint is:

diarthriodial

Which of the following bones is part of the axial skeleton?

Sternum