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Abstract

The added gradient echo pulse sequence technique: application to imaging of fluid in the temporomandibular joint.

K A Bell, J P Jones, K D Miller and D al-Refal
American Journal of Neuroradiology March 1993, 14 (2) 375-381;
K A Bell
Department of Radiology, Alton Ochsner Medical Foundation, New Orleans, LA 70121.
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J P Jones
Department of Radiology, Alton Ochsner Medical Foundation, New Orleans, LA 70121.
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K D Miller
Department of Radiology, Alton Ochsner Medical Foundation, New Orleans, LA 70121.
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D al-Refal
Department of Radiology, Alton Ochsner Medical Foundation, New Orleans, LA 70121.
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Abstract

PURPOSE To assess the value of an added gradient echo in the same pulse sequence with a T1-weighted spin echo for determining the presence of an abnormal fluid collection in the temporomandibular joint with no additional imaging time.

MATERIALS AND METHODS Using a standard T1-weighted sequence used in cine temporomandibular joint imaging, a readout gradient reversal was added and the resulting gradient echo collected. This image was compared with standard T1- and T2-weighted sequences, a short inversion recovery imaging sequence, and a small flip angle fast low-angle shot gradient-echo sequence.

RESULTS The T1-weighted spin echo preceding the added gradient echo is not affected by the gradient reversal, but the additional gradient echo adds T2* contrast information that displays fluid as bright as and compares favorably with other fluid detection sequences.

CONCLUSION The added gradient-echo technique adds sensitivity for the detection of an abnormal increase in fluid in the temporomandibular joint without adding to the overall imaging time of a routine T1-weighted sequence.

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American Journal of Neuroradiology
Vol. 14, Issue 2
1 Mar 1993
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The added gradient echo pulse sequence technique: application to imaging of fluid in the temporomandibular joint.
K A Bell, J P Jones, K D Miller, D al-Refal
American Journal of Neuroradiology Mar 1993, 14 (2) 375-381;

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The added gradient echo pulse sequence technique: application to imaging of fluid in the temporomandibular joint.
K A Bell, J P Jones, K D Miller, D al-Refal
American Journal of Neuroradiology Mar 1993, 14 (2) 375-381;
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