POST GRADUATE SEMINAR
TOPIC:- SPECIAL RADIOLOGICAL VIEWS IN ORTHOPAEDICS.
RADIO-ISOTOPIC BONE SCAN.
DR. BAHARUL ISLAM CHOUDHURY DR. P.
X-rays is produced by firing electrons at high speed onto a
The resulting beam of x-rays is attenuated by the patient’s soft
tissue & bones casting shadows which are displaced as images.
The more dense the tissue, the greater the x-rays attenuation
& therefore the more white the image that is captured.
AP AXIAL OBLIQUE PROJECTION-
The image shows the intervertebral foramina & pedicles.
AP & PA AXIAL PROJECTION-
( FERGUSON METHOD)- L-S joint & S-I joint free of superimposition.
ULTRASOUND IN ORTHOPAEDICS
Tendon rupture or partial tear
Meniscus & ligament injury.
DOPLER ULTRASOUND is used in cases where there is abnormal increase
in blood flow as in the areas of inflamation & aggressive tumours.
& other condition like DVT, Peripheral vascular disease.
RADIO ISOTOPIC BONE SCAN
Radio nuclide compounds are-
> Early detection of osteomyelitis.
> Small bone abscess , osteoid osteoma.
> Stress # & other undisplaced #.
> Loosening & infection around prosthesis.
> Femoral head ischemia & AVN
> Early detection of bone metastasis
>Useful in patient with metallic implants.
> Gives a more physiological picture.
The uptake is related to
> Osteoblastic activity
> Regional blood flow.
It is relatively highly sensitive but non specific.
Increased activity in early phase signifies increased blood flow as in
inflamation, fracture, highly vascular tumour.
Decreased activity in early phase signifies local vascular insufficiency.
Increased activity in delayed bone phase signifies fracture, local tumour,
infection, implant loosening.
Decreased activity in delayed bone phase signifies absent blood supply as in
femoral head after neck #