Term
what are the indications of a CT scan? (6) |
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Definition
- Calcaneal Fracture,
- Articular disorders,
- tarsel Coalition,
- foreign body localisation,
- infection
- congential disorders,
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Term
What are 3 contraindications of CT scan |
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Definition
- Pregancy and
- contrast allergy,
- renal failure
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Term
what are 4 advantages of Ct |
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Definition
- easily absorbed,
- fast scan time,
- good resolution and detail,
- image manipulation (can get 3d images etc)
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Term
what are 4 CT Disadvantages? |
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Definition
- Dose is high,
- Motion can cause beam hardening and streaks, weight,
- poor soft tissue contrast, expensive,
not portable |
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Term
what is 3 advantages of film digitisation? |
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Definition
- Image is converted to digital,
- data can be manipulated.
- can be send to radiologist for reporting
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Term
What are 2 disadvantages of Digitisation of films? |
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Definition
- Inefficent
- limited data manipulation
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Term
what are 4 advantages of CR? |
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Definition
- good image quality
- storage phosphors react to a rnage of xray exposures
- reduced need for repeat exposures
- abvle to print if req
- less space, time, money for chemicals etc
- allows post processing image manipulation
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Term
what are 4 disadvantages of CR? |
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Definition
- cost of equipment
- new phosphor plates are $1500 each
- cost of converting old images
- scatter control is more important
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Term
what are 4 advantages of DR? |
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Definition
- images are processed in seconds
- images are better quality than cr and film
- saves on film cost
- most practical for high volume departments
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Term
what are 4 disadvantages of DR? |
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Definition
- need and entire new xray system
- costs about 500,000 for one detector
- detector plates are 150,000
- might need anm accessory CR system for mobile theatre work
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Term
What are 4 advantages of the PACS system |
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Definition
- cost -increased efficiency
- productivity
- improved patient care
- remote access
- long term archiving
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Term
what are the disadantages of PACS system |
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Definition
- equipment costs
- in transition need 2 systems
- potential systenm failure
- reduced interdepartmental consultation
- widespread training required
- quality of image depends on workstation your using.
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Term
What is 4 indications for angiography? |
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Definition
- athersclerosis
- ischaemic Disease
- Dissection
- Stenosis
- Thrombus
- Chronic Occlusion
- Traumatic rupture/occlusion
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Term
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Definition
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Term
PTA used which radiographic technique? what does it stand for/ |
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Definition
- DSA - digital substraction Angiography
- percutaneous Transluminal angioplasty
- used for suspected occlusions stenosis, avm, haemangioma
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Term
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Definition
- Pregnancy
- Allergy to contrast
- renal impairment
- unstable Patient
- Inability to lie flat
- recent barium procedure
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Term
name 4 advantages of DSA? |
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Definition
- allows therapeutic catherisation of specific blood vessles therapeutic procedure may be performed that makes surgery unneccesary |
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Term
What are disadvantages of DSA? |
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Definition
- high radiation to pt and staff
- possible nephrotoxity to contrast
- blood product exposure
- invasive procedure
- expensive
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Term
what are the 2 types of nuclear medicine investigations? |
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Definition
- PET - Positron Emission Tomography
- SPECT - Single Photon Emission
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Term
what are 4 indications nuclear medicine may be benifical/ |
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Definition
- cancerof breas, prostrate, and others that can spread to bone
- trauma not visibleon xray
- stress fracture
- shin splint
- osteomyelitis
- atypical bone pain
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Term
what are 4 contraindications of Nuclear medicine? |
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Definition
trick question! there are 2! - pregnancy
- breast feeding
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Term
Advantages of Nuclear medicine |
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Definition
- high sensitivity for ealry detection
- low risk of allergic response
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Term
Disadvantage of nuclear medicine |
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Definition
- low resolutio images
- not specific
- takes about4 hours
- NM are highly specialised departments
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Term
what are 4 indications of MRI technology/ |
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Definition
Soft tissue pathology.... - ligament damage
- tendonitis
- Masses, cysts, tumour
- musculoskeletal #
- compartment syndrome
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Term
Contraindications of MRI? name at least 4 |
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Definition
- metallic fragments behind eye
- pacemakers
- aneurysm clips
- recent orthopaedic and dental hardware
- claustrophic
- fat patients
- cochlear eye implants
- spinal stimualtion
- inserted pumps
- some artificial valves
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Term
What are the major advantages of MRI/(5) |
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Definition
- NO ionising radiation is used
- superior soft tissue contrast
- can scan in any plane
- can tailor parameter to suite a specific q
- can image blood flood in nealry any part of body wo/ injection of contrast
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Term
What are the disadvantages of MRI? |
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Definition
- 5% of pts are claustrophobic
- some ots may be c.i with implants
- cant scan fat people
- motion artefacts
- very expensive scan (400-600)
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Term
what is tomography used for? |
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Definition
blur structures which are in front or behind of area of interest |
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Term
what do xrays land on in fluroscopy? |
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Definition
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Term
what is a major advantage of fluroscopy/ |
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Definition
- dynamic images that permits accurate position prior to conventional radiograph
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Term
what is a disadvantage of fluroscopy |
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Definition
image quality is not as good as conventional xray, so usuing this is done as well |
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Term
in arthrography what the 2 distinctions, and waht makes them different |
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Definition
- single contrast - just radio-opaque material (usually iodine based) is injected into joint
- double contrast - radio-opaque and air are injected
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Term
what are some indications for arthrography? |
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Definition
- ligament injury
- soft tissue trauma
- adhesive capsulitis
- evualte cartilage
- loose bodies in joint
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Term
what are 3 contraindications of arthrography? |
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Definition
- Pregnancy
- allergry to contrast
- infection
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Term
What are possible complicatiosn with arthography |
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Definition
- infection, local tissue damage, contrast reaction
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Term
what is a major problem with lymphangiography? |
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Definition
- long and technically difficult
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Term
name 2 indications for lymphangiography |
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Definition
- investigation of primary and secondary lymphoedema
- evaluate metastic involvemnt of lymph
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Term
what are 4 contraindications of lymphangiography... |
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Definition
- pregnancy
- allergy to contrast
- local sepsis
- poor renal function
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Term
name 4 indications of venography |
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Definition
- DVT
- assess distribution of varicosities prior to surgery
- demonstrate communication between deep vessels
- reccurent varicosities
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Term
what are some contraindications of venography |
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Definition
- poor renal function
- pregnancy
- local sepsis
- contrast allergy
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Term
name 5 possible complicatiosn with venography? |
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Definition
- infection,
- contrast reaction
- extravasation
- haematoma
- pulmonary embolus
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