Use of 1.5 Tesla and 3 Tesla MRI to evaluate femoral head reduction in hip dysplasia

Matthew S. Chin, Allen Shoemaker, Donnie M. Reinhart, Brad W. Betz, Dayle L. Maples, Matthew A. Halanski

Research output: Contribution to journalReview article

4 Citations (Scopus)

Abstract

Background: To date no comparison between 1.5 Tesla (T) and 3 T magnetic resonance imaging (MRI) scans have been performed in assessing hip reduction in patients with hip dysplasia. This study compares the use of these scans in assessing hip reduction. Methods: A retrospective review of 1.5 T and 3 T postreduction pelvic MRIs in developmental dysplasia of the hip patients for scanner time, anesthesia requirement, and subjective image quality scores were performed. Intrareader and interreader agreement of state of hip reduction was assessed. A scoring system was used to objectively compare MRI sequences between the 1.5 T and 3 T scans. Results: Of the 37 MRI scans, scanner time and anesthetic requirement was not significantly different between 1.5 T and 3 T scans (P>0.05). The 3 T scans showed slightly better image quality than 1.5 T scans (5.7 vs. 4.7), but not significant (P=0.08). With regards to state of hip reduction, intrareader Cronbach α was 0.89 with 1.5 T and 0.98 with 3 T, whereas interreader agreement was 0.79 with 1.5 T and 0.95 with 3 T, revealing greater consistency with 3 T. Mean anatomic score comparison of hip anatomic markers show no overall statistical difference between fast hip protocol sequences (f=1.113, sig=0.346) or magnet strength (f=3.817, sig=0.053). Only the coronal T2W fast spin echo demonstrated a statistically higher score on the 3 T versus the 1.5 T (19.3±9.3 vs. 12.2±6.7) scanner. Conclusions: Our study affirms that adequate images are obtainable with fast hip MRI without additional anesthesia. Good agreement was reached on image quality and hip state of reduction between readers for 1.5 T and 3 T scans, with more consistency with 3 T. Level of evidence: Diagnostic Level II.

Original languageEnglish (US)
Pages (from-to)633-637
Number of pages5
JournalJournal of Pediatric Orthopaedics
Volume31
Issue number6
DOIs
StatePublished - Sep 1 2011

Fingerprint

Hip Dislocation
Thigh
Hip
Magnetic Resonance Imaging
Anesthesia
Magnets
Anesthetics

Keywords

  • 1.5 T
  • 3T
  • MRI
  • Tesla
  • dysplasia
  • hip
  • imaging
  • infant
  • reduction

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Orthopedics and Sports Medicine

Cite this

Use of 1.5 Tesla and 3 Tesla MRI to evaluate femoral head reduction in hip dysplasia. / Chin, Matthew S.; Shoemaker, Allen; Reinhart, Donnie M.; Betz, Brad W.; Maples, Dayle L.; Halanski, Matthew A.

In: Journal of Pediatric Orthopaedics, Vol. 31, No. 6, 01.09.2011, p. 633-637.

Research output: Contribution to journalReview article

Chin, Matthew S. ; Shoemaker, Allen ; Reinhart, Donnie M. ; Betz, Brad W. ; Maples, Dayle L. ; Halanski, Matthew A. / Use of 1.5 Tesla and 3 Tesla MRI to evaluate femoral head reduction in hip dysplasia. In: Journal of Pediatric Orthopaedics. 2011 ; Vol. 31, No. 6. pp. 633-637.
@article{f4103ce6b45c4b209e0b49a2d6910cc5,
title = "Use of 1.5 Tesla and 3 Tesla MRI to evaluate femoral head reduction in hip dysplasia",
abstract = "Background: To date no comparison between 1.5 Tesla (T) and 3 T magnetic resonance imaging (MRI) scans have been performed in assessing hip reduction in patients with hip dysplasia. This study compares the use of these scans in assessing hip reduction. Methods: A retrospective review of 1.5 T and 3 T postreduction pelvic MRIs in developmental dysplasia of the hip patients for scanner time, anesthesia requirement, and subjective image quality scores were performed. Intrareader and interreader agreement of state of hip reduction was assessed. A scoring system was used to objectively compare MRI sequences between the 1.5 T and 3 T scans. Results: Of the 37 MRI scans, scanner time and anesthetic requirement was not significantly different between 1.5 T and 3 T scans (P>0.05). The 3 T scans showed slightly better image quality than 1.5 T scans (5.7 vs. 4.7), but not significant (P=0.08). With regards to state of hip reduction, intrareader Cronbach α was 0.89 with 1.5 T and 0.98 with 3 T, whereas interreader agreement was 0.79 with 1.5 T and 0.95 with 3 T, revealing greater consistency with 3 T. Mean anatomic score comparison of hip anatomic markers show no overall statistical difference between fast hip protocol sequences (f=1.113, sig=0.346) or magnet strength (f=3.817, sig=0.053). Only the coronal T2W fast spin echo demonstrated a statistically higher score on the 3 T versus the 1.5 T (19.3±9.3 vs. 12.2±6.7) scanner. Conclusions: Our study affirms that adequate images are obtainable with fast hip MRI without additional anesthesia. Good agreement was reached on image quality and hip state of reduction between readers for 1.5 T and 3 T scans, with more consistency with 3 T. Level of evidence: Diagnostic Level II.",
keywords = "1.5 T, 3T, MRI, Tesla, dysplasia, hip, imaging, infant, reduction",
author = "Chin, {Matthew S.} and Allen Shoemaker and Reinhart, {Donnie M.} and Betz, {Brad W.} and Maples, {Dayle L.} and Halanski, {Matthew A.}",
year = "2011",
month = "9",
day = "1",
doi = "10.1097/BPO.0b013e31821f9071",
language = "English (US)",
volume = "31",
pages = "633--637",
journal = "Journal of Pediatric Orthopaedics",
issn = "0271-6798",
publisher = "Lippincott Williams and Wilkins",
number = "6",

}

TY - JOUR

T1 - Use of 1.5 Tesla and 3 Tesla MRI to evaluate femoral head reduction in hip dysplasia

AU - Chin, Matthew S.

AU - Shoemaker, Allen

AU - Reinhart, Donnie M.

AU - Betz, Brad W.

AU - Maples, Dayle L.

AU - Halanski, Matthew A.

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Background: To date no comparison between 1.5 Tesla (T) and 3 T magnetic resonance imaging (MRI) scans have been performed in assessing hip reduction in patients with hip dysplasia. This study compares the use of these scans in assessing hip reduction. Methods: A retrospective review of 1.5 T and 3 T postreduction pelvic MRIs in developmental dysplasia of the hip patients for scanner time, anesthesia requirement, and subjective image quality scores were performed. Intrareader and interreader agreement of state of hip reduction was assessed. A scoring system was used to objectively compare MRI sequences between the 1.5 T and 3 T scans. Results: Of the 37 MRI scans, scanner time and anesthetic requirement was not significantly different between 1.5 T and 3 T scans (P>0.05). The 3 T scans showed slightly better image quality than 1.5 T scans (5.7 vs. 4.7), but not significant (P=0.08). With regards to state of hip reduction, intrareader Cronbach α was 0.89 with 1.5 T and 0.98 with 3 T, whereas interreader agreement was 0.79 with 1.5 T and 0.95 with 3 T, revealing greater consistency with 3 T. Mean anatomic score comparison of hip anatomic markers show no overall statistical difference between fast hip protocol sequences (f=1.113, sig=0.346) or magnet strength (f=3.817, sig=0.053). Only the coronal T2W fast spin echo demonstrated a statistically higher score on the 3 T versus the 1.5 T (19.3±9.3 vs. 12.2±6.7) scanner. Conclusions: Our study affirms that adequate images are obtainable with fast hip MRI without additional anesthesia. Good agreement was reached on image quality and hip state of reduction between readers for 1.5 T and 3 T scans, with more consistency with 3 T. Level of evidence: Diagnostic Level II.

AB - Background: To date no comparison between 1.5 Tesla (T) and 3 T magnetic resonance imaging (MRI) scans have been performed in assessing hip reduction in patients with hip dysplasia. This study compares the use of these scans in assessing hip reduction. Methods: A retrospective review of 1.5 T and 3 T postreduction pelvic MRIs in developmental dysplasia of the hip patients for scanner time, anesthesia requirement, and subjective image quality scores were performed. Intrareader and interreader agreement of state of hip reduction was assessed. A scoring system was used to objectively compare MRI sequences between the 1.5 T and 3 T scans. Results: Of the 37 MRI scans, scanner time and anesthetic requirement was not significantly different between 1.5 T and 3 T scans (P>0.05). The 3 T scans showed slightly better image quality than 1.5 T scans (5.7 vs. 4.7), but not significant (P=0.08). With regards to state of hip reduction, intrareader Cronbach α was 0.89 with 1.5 T and 0.98 with 3 T, whereas interreader agreement was 0.79 with 1.5 T and 0.95 with 3 T, revealing greater consistency with 3 T. Mean anatomic score comparison of hip anatomic markers show no overall statistical difference between fast hip protocol sequences (f=1.113, sig=0.346) or magnet strength (f=3.817, sig=0.053). Only the coronal T2W fast spin echo demonstrated a statistically higher score on the 3 T versus the 1.5 T (19.3±9.3 vs. 12.2±6.7) scanner. Conclusions: Our study affirms that adequate images are obtainable with fast hip MRI without additional anesthesia. Good agreement was reached on image quality and hip state of reduction between readers for 1.5 T and 3 T scans, with more consistency with 3 T. Level of evidence: Diagnostic Level II.

KW - 1.5 T

KW - 3T

KW - MRI

KW - Tesla

KW - dysplasia

KW - hip

KW - imaging

KW - infant

KW - reduction

UR - http://www.scopus.com/inward/record.url?scp=80051970916&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80051970916&partnerID=8YFLogxK

U2 - 10.1097/BPO.0b013e31821f9071

DO - 10.1097/BPO.0b013e31821f9071

M3 - Review article

C2 - 21841437

AN - SCOPUS:80051970916

VL - 31

SP - 633

EP - 637

JO - Journal of Pediatric Orthopaedics

JF - Journal of Pediatric Orthopaedics

SN - 0271-6798

IS - 6

ER -