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Tri 6 - Tumors > Roentgen Signs > Flashcards

Flashcards in Roentgen Signs Deck (66)
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1

5 Radiographic Densities

– Air
– Fat
– Water
– Bone
– Metal

2

______ determines if further imaging
is indicated

Plain film radiography

3

Need at least ______ decarse in bone density to see lesion in Conventional Radiography

30-50%

4

Need a lesion at least _____ in size to detect
Conventional Radiography

1-5cm

5

Time until a lesion is seen by plain film radiography

Radiographic Latent Period

6

Osteomyelitis in peripheral bone radiographic latent period

10-14 days

7

Spinal osteomyelitis radiographic latent period

21 days

8

Aggressive tumors radiographic latent period

4-6 weeks

9

– Trauma – Unexplained weight loss – Night pain – Motor deficit – Malignancy

red flag

10

– Inflammatory arthritis – Fever of unknown origin – Abnormal blood results – Deformity

red flag

11

– Failure to respond to therapy – Medicolegal concerns

red flag

12

– >50 yo – Drug or alcohol abuse – Corticosteroid use – Old or lost previous x rays – Research

yellow flag

13

– Systemic disease – Recent immigration – Rule out contraindications – Therapeutic response

yellow flag

14

– Patient education – Routine screening – Habit – Discharge status assessment – Routine biomechanical analysis – Pre-employment status

non indicators

15

– Physical limitations of patient – Inadequate equipment – Non-trained personnel – Financial gain – Recent high-level radiation exposure – Pregnancy

non indicators

16

evidence-based guidelines to assist referring
physicians and other providers in making the
most appropriate imaging or treatment decision for a specific clinical condition.

The ACR Appropriateness Criteria

17

Injection of water soluble iodinated contrast into IVD’s nucleus
pulposus via fluoroscopic control in order to determine pain
generator

Discography

18

Radionuclide Imaging

Bone Scan

19

used to identify pars fractures (gymnastic athletes)

SPECT Scan
"Single-Photon Emission Computed Tomography"

20

detects:
Metastatic disease
Tumors Infection Arthritis Fracture (occult, stress, recent fx) Avascular Necrosis (AVN)

bone scan

21

– Detects as little as 3-5% bone destruction/production
– 10x more sensitive than plain film radiography
– Great for early detection of many disease processes

bone scan

22

No uptake in Multiple Myeloma unless pathological
fracture

bone scan

23

vascular dz
msk disorders
abdominal and pelvic imaging

diagnostic ultrasound

24

high level of radiation dose
excellent bone detail

Computed Tomography (CT)

25

Mathematical Data from Axial Images is Reformatted rendering Sagittal Lumbar Spine Image

Computed Tomography (CT)

26

excellent for soft tissue resolution
very sensitive for detecting bone marrow dz
great for spinal dz, especially disc dz

MR

27

Model of bone structure formed by condensed mesenchymal cells after which bone is formed
• Skull
• Clavicles
• Mandible

Intramembranous Ossification

28

Controls width of long bones via activity of periosteum

Appositional Bone Growth

29

– Osteoblasts transform cartilage template into bone
• Tubular bones
• Vertebrae
– Chondroblasts and chondrocytes form and produce a
cartilage cast of the definitive bone

Enchondral Ossification

30

surrounds bone except at ends of bone

Periosteum