Normal Anatomy Flashcards
Which gauss line (isomagnetic contour) must be contained within the controlled area of a high field magnet?
5 gauss line
How does gadolinium contrast media work?
It shortens T1 (spin-lattice) relaxation time making tissues brighter on T1w images.
The Impar ligament and DDFT distal to the navicular bone are susceptible to magic angle on high or low field systems?
High field
What is represented by the letter C and what four structures does it attach to (4)?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/378/403/q_image_thumb.png?1654971336)
C = chondocoronal ligament
Attaches to the colateral cartialge, middle phalanx, common digital extensor tendon and chondrosesamoidean ligament.
Dorsal to the stright sesamoidean ligament what is the circular area of low signal intensity
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/378/674/q_image_thumb.png?1654971618)
The accessory ligament of the SSL
The impar ligament may appear heterogenous because?
It is filled with fluid fill pockets of synovium from the DIPj
In images obtainted with B0 perpendicualr to the limb which collateral ligament of the DIPj is suseptible to magic angle
Lateral
What shape is the SSL in cross section?
Triangular proximally, oval in the body and round distally.
How does the insertion of the SSL appear?
It can have a bulbous appearance and may have a focal central triangular area of higher signal intensity close to the insertion
Identify structures B, C, D, F, H
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/379/673/q_image_thumb.png?1654972390)
B - Sublamellar dermis and vascualr plexus
C - Solar dermis and vascular plexus
D - Circumflex vessels
F - Lamellar interface (formed by the interdigitating permal and epidermal lamellae)
H - Hoof wall
Using a magnet with B0 perpendicualr to the limb (e.g. low feild standing) are the OSLs suseptibel to magic angle?
Proximal aspect of the medial (related to the variabel fibre pattern in this region.
What is the signal intensoty of the SDFT in the pastern region.
Superficial digital flexor tendon (SDFT) has a uniformly low signal intensity until close to its insertion, where it becomes more heterogeneous.
Which aspect of the manica flexoria is thicker?
Proximal aspect
What is indicated by the black arrow in these images?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/380/701/q_image_thumb.png?1654973735)
A Gibb’s or truncation artefact
In sound horses what regions of the sagittal ridge of MC3 and MT3 are has thicker subchondral bone?
Dorsal third
What is represent by the white arrows?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/381/494/q_image_thumb.png?1654974349)
Either side of the sagittal ridge of MC/T3 a small number of vascualr channels may be present wthin the condyles.
What type of bone is cortical bone?
Woven bone
The magic angle effect is most obvious when a structure is?
is at 55 degrees to the static magnetic field.
Is the appearance of the SL branch normal?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/381/734/q_image_thumb.png?1654974559)
In a sagittal plane, at the palmar/plantar aspect of the branches of the SL, level with the MCP/MTP joint, there is often a region of diffuse, high SI, which continues distally to the insertion onto the proximal sesamoid bone
Should the superficial collateral ligaments of the fetlock appear symetrical in size?
Some mild asym- metry in thickness between lateral and medial superficial collateral liga- ments is a normal variation. The superficial components are thicker and longer than the deeper oblique components. The deep and superficial com- ponents of the collateral ligaments may be separated by synovial fluid
Why is there often a linera intermediate SI band within the dorsal aspect of the DDFT at the level of the fetlock joint?
This is attributed to structural change within the DDFT secondary to compression against the palmar/plantar aspect of the MCP/MTP joint.
At the level of the fetlock what is present between the SDFT and DDFT?
On transverse images, the palmar/plantar surface of the DDFT is con- nected at midline by fascia to the dorsal border of the SDFT, and these surfaces of the tendons may have a thicker paratenon compared with the dorsal surface of the DDFT and the palmar/plantar surface of the SDFT.
Why do the OSLs have a heterogenous appearacne comapred to the DDFt and SDFT?
![](https://s3.amazonaws.com/brainscape-prod/system/cm/387/382/258/q_image_thumb.png?1654975072)
Due to the fascicular nature of these ligaments
What is the normal signal intensity of the intersesamoidean ligament
heterogeneous, intermediate SI, with small, focal areas of intermediate to high SI on T2*-weighted images
How thick is the normal PAL
<2mm
Do the OSLs have symetrical size.
There is often some asymetry of size, no spesific side.