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Stress fracture of pars interarticularis

Case Study
Connell, David, M.D. Imaging @ Olympic Park • Australia

Patient history

16-year-old female with lower back pain without obvious cause presented for an MR examination.

MR examination

Achieva 3.0T X-series with 15-channel SENSE Spine coil.

T1 THRIVE (T1-weighted high resolution 3D TFE) with reconstructed to voxel size 0.53 x 0.53 x 1.00 mm, scan time 4:32 minutes.
 Reformatted T1 THRIVE
Reformatted T1 THRIVE

Oblique reconstruction of T1 THRIVE data through the pars interarticularis shows the classic “scotty dog appearance”. Note the fracture through the neck of the pars. These stress fractures generally occur in teenagers and previously required an additional CT with or without a nuclear medicine scan, both of which expose the developing body to high radiation doses.


Stress fracture of pars interarticularis.

Clinical impact of using Achieva 3.0T in sports medicine

Our MSK images show far more detail than comparable images taken on 1.5T. The higher signal at 3.0T allows to image with much thinner slices and higher resolution with no compromise on scanning speed. Achieva 3.0T is more sensitive than ultrasound in visualizing and quantifying small muscle tears and strains.

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Nov 17, 2011

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Case Study
Achieva 3.0T, Achieva 3.0T X-series
Musculoskeletal, pars interarticularis, SENSE Spine coil, stress fracture

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