Butler Flashcards
To increase contrast levels you must:
Double the mAs and reduce the kV by 15%
Half the mAs and increase the kV by 15%
Double the kV and reduce the mAs by 15%
Half the kV and increase the mAs by 15%
Double the mAs and reduce the kV by 15%
What is an alternative method if you don’t have a grid to not lose contrast?
Increase your object to film distance
Increase your film to focus distance
Decrease your object to film distance
Decrease your film to focus distance.
Increase your object to film distance
As from which object width you need to use a grid?
15 cm
20 cm
11 cm
7 cm
11 cm
Intra-articular gas can remain present radiographically until when?
24 hours
36 hours
48 hours
72 hours
48 hours
How fast can osteophytes become present?
1 week
2-3 weeks
3-4 weeks
6 weeks
2-3 weeks
How much decrease of mineralisation is needed before it becomes evident radiographically?
More than 35%
More than 30%
More than 25%
More than 15%
More than 30%
A normal mineral content of an adult horse is;
35% mineral and 65% matrix and cells
65% mineral and 35% matrix and cells
45% mineral and 55% matrix and cells
55% mineral and 45% matrix and cells
65% mineral and 35% matrix and cells
Osteopetrosis can not be caused by the following disease:
Hypervitaminosis A
Fluorine poisoning
Pulmonary silicosis
Maries disease
Maries disease
What is the most commonly affected physis in the horse resulting in physitis?
Distal radius and distal metacarpal/metatarsal
Distal radius and distal tibia
Distal phalanges and distal metacarpal/metatarsal
Distal tibia and distal phalanges
Distal radius and distal metacarpal/metatarsal
Common location for enostosis like lesions are;
Tibia
Radius
Humerus
Femur
Femur
In which case is the dorsolateralpalmaromedial flexed 45 degree view used in a foot radiograph and in which case the 60 degree?
45: focus on the distal interphalangeal joint, 60: focus on the pastern joint
45: focus on the palmar processes, 60: focus on the distal interphalangeal joint
45: focus on the navicular bone, 60: focus on distal phalanx
45: focus on the palmar processes, 60: focus on osteophytes/enthesophytes
45: focus on the palmar processes, 60: focus on the distal interphalangeal joint
In which case it is usefull to obtain the lateral45proximal-mediodistal oblique image?
To skyline the palmar processes
To skyline the articular margins of the distal interphalangeal joint
To obliquely skyline the navicular bone
To skyline the solar margin
To skyline the palmar processes
How long does it take for the distal phalanx to completely ossify, model and enlarge?
12 months
18 months
2 years
3 years
18 months
A fragment seen at the dorsoproximal aspect of the extensor processs can not be;
Dystrophic mineralisation of the common digital extensor tendon
Separate centre of ossification
Fracture
OCD lesion
OCD lesion
Which radiographic signs are not associated with pedal osteitis complex?
Irregular outline and elongation of the palmar processes
Radiolucent zones in the dorsal aspect of the solar margin
Clear remodelling of the solar margin of the distal phalanx
Osseous cyst like lesions of the palmar processes
Clear remodelling of the solar margin of the distal phalanx
What indicates new bone formation at the middle portion of the dorsal compact bone of the distal phalanx?
Abnormal stress on the flexor tendons
Abnormal stress on the suspensory apparatus
Laminitis
Long toe, low-heel syndrome
Abnormal stress on the suspensory apparatus
Which of the following osseous cyst like lesions of the distal phalanx are sometimes incidentally found and/or clinically less important?
Osseous cyst like lesions at or palmar to the collateral fossa of the distal phalanx
Subchondral bone cysts in the midline of the distal phalanx
Cysts located in the lateral or medial border of the distal interphalangeal joint/distal phalanx
Cystic lesions in the distal aspect of the solar margin
Cysts located in the lateral or medial border of the distal interphalangeal joint/distal phalanx
Extensive ossification of the ungular cartilages is often associated with?
Enthesophytes of the latero- and mediodistal aspect of the proximal phalanx
Osteophytes of the articular margin of the distal phalanx
Bone trauma of the distal phalanx
Poor demarcation of the compact and spongy bone within the cartilages
All of the above
All of the above
An articular mid sagittal fracture of the distal phalanx is categorized as a type;
Type 1
Type 3
Type 4
Type 5
Type 3
A grade 3 ossification of the collateral cartilages is characterized by;
Ossification up to the level of the lateral or medial margins of the DIPJ
Ossification up to the level of the mid sagittal aspect of the DIPJ
Ossification up to the level of the most proximal aspect of the navicular bone
Ossification up to the level of the midpoint of the middle phalanx
Ossification up to the level of the most proximal aspect of the navicular bone
Which palmar process is most of the times affected in race horses in Australia?
Left lateral
Left medial
Right lateral
Right medial
All equally
Left lateral, Right medial
What is the reference value for horses with laminatis for the thickeness of the dorsal hoof wall and the ratio to the palmar length of the distal phalanx?
>20 mm, 28%
> 25 mm, 27%
<20 mm, 27%
<25 mm, 28%
>20 mm, 28%
What represent a radiolucent line in between the distal phalanx and the dorsal hoof wall or sole?
Keratoma
Necrotic laminar tissue
Serum collected between the dermal and epidermal laminae due to inflammation
Hoof abscess
Necrotic laminar tissue
Serum collected between the dermal and epidermal laminae due to inflammation
In case a laminitic horse has a distal phalanx, which sinks, which aspect goes first?
Medial
Lateral
Dorsal
palmar
Medial
Which of the following below can not be found in horses with laminated performing a venogram?
Altered position of the distal dorsal aspect of the distal phalanx relative to the circumflex vein
Distribution of contrast medium into abnormal sublamellar tissues
Distortion of the circumflex vessel dorsally because of inward growth of solear horn
Increased flow and widening of the vessels of the coronary plexus
Increased flow and widening of the vessels of the coronary plexus
What is abnormal in the below image?
a. 1
b. 2
c. 3
d. nothing
d. nothing
Up to how many lucent zone may be present at the distal border of the navicular bone to still be considered normal?
5
7
9
No number accounted for
7
When does the proximal physis of the proximal and middle phalanx close?
Both at one year of age
Both in between 8-12 months
Proximal phalanx; 1 year, middle phalanx 8-12 months
Proximal phalanx; 8-12 months, middle phalanx; 1 year
Proximal phalanx; 1 year, middle phalanx 8-12 months
In older and larger horses there is often remodelling of the palmar aspect of the proximal phalanx. What is the cause for this?
Enthesopathy of the oblique sesamoid bones
A superimposition of the horizontal distal or proximal row of nutrient foramen
Insertion of the proximal digital annular ligament
Osteophyte formation of the pastern joint
Enthesopathy of the oblique sesamoid bones
In larger horses there is often remodelling of the dorsal mid body of the middle phalanx. What is the cause of this?
Capsule enthesopathy of the proximal interphalangeal joint
Osteophyte formation of the proximal interphalangeal joint
Enthesopathy of the collateral ligaments of the proximal interphalangeal joint
Enthesopathy of the abaxial palmar ligaments of the proximal interphalangeal joint
Enthesopathy of the collateral ligaments of the proximal interphalangeal joint
What may not be an incidental radiographic finding?
Oblique sesamoid ligament mineralisation/fracture/fabellae
Dorsal chip of the fetlock joint
Birkeland fragment (intra vs. extra articular)
Spur formation of the middle phalanx pointing distally
Dorsal chip of the fetlock joint
What may not be an incidental radiographic finding?
Radiolucent depression between the condyles of the proximal phalanx distally
Spur formation dorsally of the proximal interphalangeal joint
Subluxation of the proximal interphalangeal joint
Radiolucent depression eccentrically located in the proximal or middle phalanx distally
Radiolucent depression eccentrically located in the proximal or middle phalanx distally
What can cause a subluxation of the proximal interphalangeal joint?
Injury of the straight sesamoid ligament
Injury of the palmar ligaments
Very poor foot balance (club foot)
Constant contractility of the flexor muscle groups
All of the above
All of the above
What is a less guarded prognosis compared to others?
OCLL seen in horses of 6 months of age in the distal condyle of the proximal phalanx
Multiple smaller OCCL seen in young horses, front limb worse than hindlimb
Eccentric middle and proximal phalanx OCLL in the subchondral bone
All of them are equally poor
OCLL seen in horses of 6 months of age in the distal condyle of the proximal phalanx
Proximal P1 subchondral bone lesions are associated with;
Repetitive trauma
Acute cartilage damaging traumatic event
Vertical development of affected subchondral bone
Horizontal development of affected subchondral bone
Repetitive trauma
Vertical development of affected subchondral bone
Distal P1 subchondral bone lesions are associated with;
Repetitive trauma
Acute cartilage damaging traumatic event
Vertical development of affected subchondral bone
Horizontal development of affected subchondral bone
Acute cartilage damaging traumatic event
Horizontal development of affected subchondral bone
A normal DP view of the fetlock is differently taken for a front limb and a hind limb, what is the difference??
DP front limbs: 10 degree angle, DP hind limbs: 15 degree angle
DP hind limbs: 10 degree angle, DP front limbs: 15 degree angle
DP front limbs: 15 degree angle, DP hind limbs: 20 degree angle
There is no difference, it is depanding on the position of the legs.
DP front limbs: 10 degree angle, DP hind limbs: 15 degree angle
The dorsal 45 proximal 45 lateral-palmar distal medial oblique view of the fetlock is used to visualise:
Lateral condyle of the metacarpus/tarsus
Medial condyle of the metacarpus/tarsus
Lateral palmar/plantar process of the proximal phalanx.
Medial palmar/plantar prociess of the proximal phalanx.
Lateral condyle of the metacarpus/tarsus
When evaluating a vertical condylar fracture of the third metacarpus or metatarsus or stress related bone injury of its palmar aspect is best visulised in which view?
Flexed DP view with 0 degree angle
Normal DP vieuw with 10 degree angle proximodistally
Flexed DP view with 10 degree angle distoproximally
Extendend DP view with 15 degree angle distoproximally
Extendend DP view with 15 degree angle distoproximally
The subchondral bone plate of the proximal phalanx and the corresponding condyles of the third metacarpus are sometimes different medially and laterally, what is true? (3X)
The medial condyle of MCIII is wider
The lateral condyle of MCIII is wider
The lateral aspect of the subchondral bone plate of P1 thicker
The medial aspect of the subchondral bone plate of P1 is thicker
This is also seen in the hind limbs
The medial condyle of MCIII is wider
The lateral aspect of the subchondral bone plate of P1 thicker
This is also seen in the hind limbs
What is gas artefact sometimes seen in the fetlock joint?
A sign of vacuum phenonomon (OA)
Overflexion of the joint during imaging
Due to injection of the fetlock joint
All of the above
Overflexion of the joint during imaging
Which of the below decriptions/findings are not used in a familiar grading scheme for proximal sesamoid bones?
Presence or absence of vascular channels
The width of the vascular channels
The divergence of the vascular channels
The presence of entheseoous new bone
Elongation of the bone itself
Abaxial radiolucent areas
The presence of entheseoous new bone
Elongation of the bone itself
Abaxial radiolucent areas
Which of the following ligaments does not insert on the proximal sesamoid bones?
Suspensory ligament
Axial and abaxial palmar ligaments
Palmar annular ligament
Sesamoid ligaments
Axial and abaxial palmar ligaments
Periarticular dystrophic mineralisation at the dorsal aspect of the fetlock joint is often seen in association with?
Degenerative joint disease
Chronic infection
Capsulitis
Chronic tendinitis of the common digital extensor tendon
Chronic infection
Which side of the fetlock joint is commenly first affected by degenerative joint disease?
Dorsolateral
Dorsomedial
Palmar/plantarlateral
Palmar/plantarmedial
Dorsomedial
Which risk factors are associated with dorsal fragments of the proximal aspect of the proximal phalanx and lameness in warmbloods?
Age above 7 years
More than one fragment
Evidence of movement of the fragment
Associated cartilage and synovitis seen arthoscopically
Age above 7 years
More than one fragment