Principles of Imaging Flashcards
bone tries to form new bone to make up for the destruction
Involucrum (vs Sequestrum w/c is more white)
abnormal displacement of articulating surfaces such that the surfaces are not in contact (total disarticulation)
Dislocation (Vs sublaxation which is incomplete diarticulation)
Appearance of Cervical spine during bacterial or Tuberculous infection in XR
Squarish Vertebral bodies
Above the abnormal wedge-shaped vertebra is where the infection is
appear whiter
Most affected vertebrae in Bacterial TB
t11 and t12
Bone and joint involvement
Csused by trauma or aging
Arthritides
Bone formations from traction effects at the sites of capsule attachments
Osteopjhyte formation seen in OA or Degenerative Joint Disease
Requirement for diagnosis of OA
Joint space not maintaned
5 Radiographic changes in OA
- ASsymetric Joint Space Narrowing
- Subchondral Sclerosis
- Osteophyte Formation
4 Subchondral cyst formation
5 Intercondylar Eminence
Differentiate DJD from RA
RA = Bilateral, symmetrical in the non-weight-bearing joints
EArly radiologic findings in Sclerosis
PEriarticular Osteoporosos
-Hypertvasculization
-REsorption og bone calcium deposits
Fusiform tissue Swelling
Late Radiologic findings in sclerosis
Extensive cartilage destruction, Bone eriosions and ankylosis
Modt common Primary bone tumor
odteocytome/ -sarcoma, Multiple myeloma
XR: Elderyly pt presents with Big mass on Pelvis, CAnnot walk, primary Differential
Chondrosarcoma, If young,think osteosarcoma
Sunburst appearance is a pathognomic sign of?
OSTEOSARCOMA, but not all will present with sunburst appearance
Suburst appearance happens when the tumor is growing too fast and bone comepensation cannto catch up resulting in abnormal pattern of growth (Scattered Bone Formation)
Most common site of osteosarcoma
Knee joint
1. Distal femur
2 Proximal tibia
3 proximal humerus
Popcorn like appearance
Chondrosarcoma
Bone lucencies in XR with blood dyscracia
Multiple Myeloma
Common indications for ultrasound
/trauma, Overuse syndromes, Soft tissue masses, Infections/Effusions
Painful condition affecting tendon on the radial aspect of the wrist
De Quervain’s TEnosynovitis
Black Fluid in UTZ and White solid lines in UTZ
Ganglion Cyst, Lipoma
Modality to use for Hairline Fracture
CT scan
Painful spine area that moves forward or backward from the expected line, pushing/pulling the nerves as well
Listhesis
Mgt for Osteosarcoma
Disarticulate up to the next higher joint
Alwaysa go for lim salvaging
Limb salvage, Chemo, radio
moda for ruling out Ligamentous Injury
MRI
specaial pracution for renal and pregnant patients
MRI
imaging modality of choice for soft tissues, joints and bone marrow
Magnetic REsonance Imaging
for cortical Bone evaluation
CT scan
fastest modality
CT scan (needs only 2 secs) compared to MRI 30 mins
modality for bulging disks (disk spaces)
spinal MRI
Honeycomb pattern in MRI
Probably Giant CEll tumor, if there is fluid, then it is GCT
what are hot spots in Skeletal Scintigraphy
Blacker AReas which represent high metabolic activity
Modality that detects glucose
Positive Emission Tomographic Scan
Post Treatment diagnostic Tool
PET-CT
Tracer isotope used in Positive Emission Tomographic Scan
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