Kinematic magnetic resonance imaging of the normal shoulder

Assessment of the labrum and capsule

Etienne Cardinal, Kenneth Buckwalter, Ethan M. Braunstein

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Objective: TO examine the normal shoulder, specifically the labrum and the capsule, with kinematic magnetic resonance imaging (MRI) in asymptomatic volunteers. Subjects and methods: Fourteen asymptomatic volunteers 22 to 53 years of age were studied with a 1.5-T Signa Advantage imager (GE Medical Systems, Milwaukee). Successive static gradient-echo images were obtained in the transverse plane at the mid-glenoid level as the shoulder was successively positioned from full internal to full external rotation. These images were correlated with standard transverse T1-weighted spin-echo images and gradient-echo volume images obtained in the neutral position. Results: The anterior labrum was slightly mobile during rotation in 11 subjects and changed shape from blunted or round to triangular in 8 subjects. A wide variation in morphologic features of the anterior labrum was observed. During rotation, a slight increase in signal intensity was noted in the anterior labrum of five of the subjects. The posterior labrum maintained a relatively stable triangular shape in most cases. Dynamic study allowed assessment of the anterior capsule insertion in all cases. Three subjects had type 1 and 11 had type 2 capsular insertion. No cases of type 3 insertion were identified. Conclusions: Variation in the shape and signal intensity of the anterior labrum observed in normal asymptomatic volunteers during transverse kinematic examination of the shoulder should be taken into account during evaluation of shoulder instability, since this variation may be clinically insignificant. Kinematic MRI allows easy evaluation of the anterior capsule.

Original languageEnglish
Pages (from-to)44-50
Number of pages7
JournalCanadian Association of Radiologists Journal
Volume47
Issue number1
StatePublished - 1996

Fingerprint

Biomechanical Phenomena
Capsules
Magnetic Resonance Imaging
Volunteers
Healthy Volunteers

Keywords

  • Glenoid labrum
  • Joint capsule
  • Kinematic magnetic resonance imaging
  • Shoulder

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Kinematic magnetic resonance imaging of the normal shoulder : Assessment of the labrum and capsule. / Cardinal, Etienne; Buckwalter, Kenneth; Braunstein, Ethan M.

In: Canadian Association of Radiologists Journal, Vol. 47, No. 1, 1996, p. 44-50.

Research output: Contribution to journalArticle

@article{f89436384c6845a08f3bee69c1fca473,
title = "Kinematic magnetic resonance imaging of the normal shoulder: Assessment of the labrum and capsule",
abstract = "Objective: TO examine the normal shoulder, specifically the labrum and the capsule, with kinematic magnetic resonance imaging (MRI) in asymptomatic volunteers. Subjects and methods: Fourteen asymptomatic volunteers 22 to 53 years of age were studied with a 1.5-T Signa Advantage imager (GE Medical Systems, Milwaukee). Successive static gradient-echo images were obtained in the transverse plane at the mid-glenoid level as the shoulder was successively positioned from full internal to full external rotation. These images were correlated with standard transverse T1-weighted spin-echo images and gradient-echo volume images obtained in the neutral position. Results: The anterior labrum was slightly mobile during rotation in 11 subjects and changed shape from blunted or round to triangular in 8 subjects. A wide variation in morphologic features of the anterior labrum was observed. During rotation, a slight increase in signal intensity was noted in the anterior labrum of five of the subjects. The posterior labrum maintained a relatively stable triangular shape in most cases. Dynamic study allowed assessment of the anterior capsule insertion in all cases. Three subjects had type 1 and 11 had type 2 capsular insertion. No cases of type 3 insertion were identified. Conclusions: Variation in the shape and signal intensity of the anterior labrum observed in normal asymptomatic volunteers during transverse kinematic examination of the shoulder should be taken into account during evaluation of shoulder instability, since this variation may be clinically insignificant. Kinematic MRI allows easy evaluation of the anterior capsule.",
keywords = "Glenoid labrum, Joint capsule, Kinematic magnetic resonance imaging, Shoulder",
author = "Etienne Cardinal and Kenneth Buckwalter and Braunstein, {Ethan M.}",
year = "1996",
language = "English",
volume = "47",
pages = "44--50",
journal = "Canadian Association of Radiologists Journal",
issn = "0846-5371",
publisher = "Canadian Medical Association",
number = "1",

}

TY - JOUR

T1 - Kinematic magnetic resonance imaging of the normal shoulder

T2 - Assessment of the labrum and capsule

AU - Cardinal, Etienne

AU - Buckwalter, Kenneth

AU - Braunstein, Ethan M.

PY - 1996

Y1 - 1996

N2 - Objective: TO examine the normal shoulder, specifically the labrum and the capsule, with kinematic magnetic resonance imaging (MRI) in asymptomatic volunteers. Subjects and methods: Fourteen asymptomatic volunteers 22 to 53 years of age were studied with a 1.5-T Signa Advantage imager (GE Medical Systems, Milwaukee). Successive static gradient-echo images were obtained in the transverse plane at the mid-glenoid level as the shoulder was successively positioned from full internal to full external rotation. These images were correlated with standard transverse T1-weighted spin-echo images and gradient-echo volume images obtained in the neutral position. Results: The anterior labrum was slightly mobile during rotation in 11 subjects and changed shape from blunted or round to triangular in 8 subjects. A wide variation in morphologic features of the anterior labrum was observed. During rotation, a slight increase in signal intensity was noted in the anterior labrum of five of the subjects. The posterior labrum maintained a relatively stable triangular shape in most cases. Dynamic study allowed assessment of the anterior capsule insertion in all cases. Three subjects had type 1 and 11 had type 2 capsular insertion. No cases of type 3 insertion were identified. Conclusions: Variation in the shape and signal intensity of the anterior labrum observed in normal asymptomatic volunteers during transverse kinematic examination of the shoulder should be taken into account during evaluation of shoulder instability, since this variation may be clinically insignificant. Kinematic MRI allows easy evaluation of the anterior capsule.

AB - Objective: TO examine the normal shoulder, specifically the labrum and the capsule, with kinematic magnetic resonance imaging (MRI) in asymptomatic volunteers. Subjects and methods: Fourteen asymptomatic volunteers 22 to 53 years of age were studied with a 1.5-T Signa Advantage imager (GE Medical Systems, Milwaukee). Successive static gradient-echo images were obtained in the transverse plane at the mid-glenoid level as the shoulder was successively positioned from full internal to full external rotation. These images were correlated with standard transverse T1-weighted spin-echo images and gradient-echo volume images obtained in the neutral position. Results: The anterior labrum was slightly mobile during rotation in 11 subjects and changed shape from blunted or round to triangular in 8 subjects. A wide variation in morphologic features of the anterior labrum was observed. During rotation, a slight increase in signal intensity was noted in the anterior labrum of five of the subjects. The posterior labrum maintained a relatively stable triangular shape in most cases. Dynamic study allowed assessment of the anterior capsule insertion in all cases. Three subjects had type 1 and 11 had type 2 capsular insertion. No cases of type 3 insertion were identified. Conclusions: Variation in the shape and signal intensity of the anterior labrum observed in normal asymptomatic volunteers during transverse kinematic examination of the shoulder should be taken into account during evaluation of shoulder instability, since this variation may be clinically insignificant. Kinematic MRI allows easy evaluation of the anterior capsule.

KW - Glenoid labrum

KW - Joint capsule

KW - Kinematic magnetic resonance imaging

KW - Shoulder

UR - http://www.scopus.com/inward/record.url?scp=0029928388&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029928388&partnerID=8YFLogxK

M3 - Article

VL - 47

SP - 44

EP - 50

JO - Canadian Association of Radiologists Journal

JF - Canadian Association of Radiologists Journal

SN - 0846-5371

IS - 1

ER -