Tech Skills Intro

Front 1

Define posteroanterior (PA)

Back 1

Pt’s chest is pressed against cassette. Beam emanating from pt’s backside.

Front 2

Define anteroposterior (AP)

Back 2

Pt’s back is pressed against cassette. Bema emanating from pt’s front.

Front 3

How does the following film density show up on a radiographic image? 1. Air 2. Fat 3. Bone 4. soft tissue

Back 3

1. air = black 2. fat = black 3. bone = white 4. soft tissue = shades of gray

Front 4

Name the 4 types of densities

Back 4

air, fat, bone, soft tissue

Front 5

What are the 3 most common radiographic views

Back 5

1. AP 2. PA 3. Lateral

Front 6

What are 3 less common radiographic views

Back 6

1. AP Chest 2. Apical lordodic 3. Expiratory chest

Front 7

When would you want an AP Chest view

Back 7

Usually in ER or hospital when pt is non-ambulatory. Heart appears larger in this view because it is farther away

Front 8

What is the benefit of an expiratory chest view

Back 8

can help find pneumothorax or unilateral diaphragm paralysis

Front 9

Define digital radiographic image:

Back 9

computed radiography. Special phosphor plate instead of film is used. Uses laser beam that causes light to be released from phosphor plate

Front 10

Define contrast media:

Back 10

injected IV to enhance organs and other soft tissues. It increases their density

Front 11

Define Angiography:

Back 11

injection of contrast media directly into a vein or artery

Front 12

What are commonly used contrast agents

Back 12

barium sulfate, high/low osmolar iodinated compounds, iar and gadolinium

Front 13

Define sagittal/coronal/axial anatomic planes:

Back 13

Sectional, cross sectional and transverse views of the body

Front 14

Define helical or spiral CT:

Back 14

pt continuously moves thru gantry while x-ray tube continuously encircles pt. Results in spiral configuration.

Front 15

Define magnetic resonance:

Back 15

hydrogen protons absorb the broadcast radio wave energy and become energized or resonate

Front 16

Define magnetic resonance angiography:

Back 16

image vessels without using needles, caths, or iodinated contrast media

Front 17

Define Ultrasonography:

Back 17

noninvasive and doesn’t use x-rays or radiation. Uses sectional anatomy and emits high-frequency sound waves

Front 18

Define sound waves:

Back 18

When a sound wave encounters an acoustic interface or boundary, the sound is absorbed, deflected or reflected then digitized

Front 19

Define homogeneous echo pattern HEP:

Back 19

Having increased or more internal echoes. Solid organs have HEP, where fluid-filled organs and masses have fewer internal echoes

Front 20

Be able to describe the basic theory behind each of the diagnostic imaging modalities: CT

Back 20

Computed tomography was developed in 1970’s by the Beatles. Images are produced by x-rays, detectors and computers

Front 21

Be able to describe the basic theory behind each of the diagnostic imaging modalities: Ultrasound

Back 21

images are produced by high-frequency sound waves, transducers and computers

Front 22

Be able to describe the basic theory behind each of the diagnostic imaging modalities: MRI

Back 22

Magnetic resonance imaging is produced by magnetic fields, radio-frequency waves and computers

Front 23

Name some indications for ultrasound

Back 23

OB
Pediatric brain
Testicle and prostate,
Female pelvis, Chest for pleural fluid drainage, Abd Vascular disease

Front 24

Name some indications for CT

Back 24

Trauma, Intracranial hemorrhage, ABD injuries, Fracture detection and eval, Spine alignment, Detect FB, Dx of primary or secondary neoplasms, Tumor staging

Front 25

What are the contraindications for MRI

Back 25

Pregancy, Cerebralaneurysms, Cardiac pacemakers, Inner ear implants, Metallic FB in and around eyes

Front 26

Know the circumstances under which you would order a CT or MRI with or without contrast, and what structures you are trying to evaluate.

Back 26

Contrast is used to evaluate soft tissues, angiography, myelography (spinal subarachnoid space, urinary tract, GI. Always check kidney function first!

Front 27

TECH SKILLS: INTRO INTO RADIOLOGY: RADIOGRAPHIC IMAGING, CT, MRI

Back 27

TECH SKILLS: INTRO INTO RADIOLOGY: RADIOGRAPHIC IMAGING, CT, MRI

Front 28

What is T1 in MRI used for

Back 28

tend to have excellent resolution and are used to procure anatomic information.

Front 29

What is T2 in MRI used for

Back 29

better contrast than T1 and cause water to light up. Used when searching for pathology which contains more water

Front 30

Compare and contrast CT and MRI

Back 30

CT has high resolution for imagin anatomy. MRI has high soft tissue contrast that makes it better for soft tissue imaging