Dr. SACHIN BABANAGAR DNB (RADIODIAGNOSIS) D. Y PATIL MEDICAL COLLEGE, KOLHAPUR
1. BONE & JOINT IMAGING
(CT & MRI)
DR. SACHIN BABANAGAR
DNB (RADIODIAGNOSIS)
D. Y PATIL MEDICAL COLLEGE
KOLHAPUR
2. Indications of CT and MRI
Differences between normal and abnormal tissue is often clearer on an MRI
image than a CT.
Trauma
Infections
Neoplasms
Degeneration
16. (A) Initial AP view shows AO type B1 femoral shaft fracture. (B)
Postoperative AP view, (C) lateral view, (D) preoperative 3D CT image
(E) postoperative 3D CT image show bursting fracture of proximal
38. CT Imaging
Not part of routine work-up use limited to
specific circumstances
Used to evaluate areas with focal exam findings
and negative plane films
Chronic osteomyelitis of the tibia in a 57 y/o man.
‘A’ and ‘B’ are axial CT’s of the tibia-fibula showing hypertrophic expanded new
bone (involucrum( around the central dead bones (sequestra). Note the cortical
break anteriorly at the fistula tract (cloaca).
39. Subacute MRI Findings
Brodie’s abscess
(intraosseous abscess, internal wall covered by granulation tissue)
16 y/o with Brodie’s
abscess. T1 weighted
image of the knee (A)
demonstrates the double
line effect, a focal area of
low signal with alternating
bands of high and low
signal. Axial T2 weighted
image of the proximal tibia
at the same level (B)
demonstrates a region of
high-intensity surrounded
by alternating bands of
low signal and high signal.
Subacute osteo is often confused with tumor
(osteosarcoma, Ewing)
Fig. 9. Sixteen-year-old male patient with history of six weeks of pain in the right knee with fever consistent with Brodie abscess. T1 weighted image of the knee (A) demonstrates the double line effect, a focal area of low signal with alternating bands of high and low signal. Axial T2 weighted image of the proximal tibia at the same level (B) demonstrates a region of high-intensity surrounded by alternating bands of low signal and high signal.
