Cover Image
QR Code

MAPIRANJE T2 RELAKSACIJSKEGA ČASA ZDRAVEGA HRUSTANCA KOLENA.

Introduction: T2 mapping is a quantitative MRI (magnetic resonance imaging) method for estimating the degree of knee cartilage damage. It is applied with different values of echo times – TE. Objective: The aim of this study was to define reference values of T2 relaxation time on different ROI (regio...

Full description

Published in:Bulletin: Newsletter of the Society of Radiographers of Slovenia & the Chamber of Radiographers of Slovenia Vol. 35; pp. 29 - 31
Main Authors: Kocet, Laura, Zalokar, Nika, Romarić, Katja
Format: Journal Article
Published: Slovenian Society of Radiographers 2018 Supplement
Online Access:View this record in EBSCOhost
fields @attributes:
  recordID: 1
pdfLink:
plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=134755748&site=ehost-live
header:
  @attributes:
    shortDbName: ccm
    uiTerm: 134755748
    longDbName: CINAHL Complete
    uiTag: AN
  controlInfo:
    bkinfo:
    dissinfo:
    jinfo:
      jid:
        07185551
        95H6
      jtl: Bulletin: Newsletter of the Society of Radiographers of Slovenia & the Chamber of Radiographers of Slovenia
      issn: 07185551
      maglogo: N
    pubinfo:
      dt: 2018 Supplement
      vid: 35
      pid: 56331
      pub: Slovenian Society of Radiographers
    artinfo:
      ui:
        134755748
        134755748
      ppf: 29
      ppct: 2
      formats:
        fmt:
          @attributes:
            type: P
      tig:
        atl: MAPIRANJE T2 RELAKSACIJSKEGA ČASA ZDRAVEGA HRUSTANCA KOLENA.
      aug:
        au:
          Kocet, Laura
          Zalokar, Nika
          Romarić, Katja
        affil: Univerza v Ljubjani, Zdravstvena fakulteta, Zdravstvena pot 5, 1000 Ljubljana.
      sug:
      ab:
        Introduction: T2 mapping is a quantitative MRI (magnetic resonance imaging) method for estimating the degree of knee cartilage damage. It is applied with different values of echo times – TE. Objective: The aim of this study was to define reference values of T2 relaxation time on different ROI (region of interest) of a non-damaged knee-joint cartilage for MR scanner Philips Achieva 3.0 T TX. Methods: 10 patients without any known knee injuries were selected. The T2 mapping pulse sequence in the sagittal plane was used (TR 1000 ms; TE 6 ms, 12 ms, 18 ms, 24 ms, 30 ms, 36 ms, 42 ms, 48 ms; FOV 160 × 160 mm; voxel 0.8 × 0.9 mm; slice thickness 3 mm; matrix 196 × 161; number of averages: 1). Three ROIs of a cartilage region were defined on a parametric map (anterior, central and posterior) of a medial and lateral femur cartilage, medial and lateral tibia cartilage and patella (proximal, central, distal). Mean value was presented as a T2 relaxation time. Results: T2 relaxation time of cartilage (mean ± SD): medial femur cartilage 42.34 ms (4.11 ms); lateral femur cartilage 45.03 ms (6.69 ms); medial tibial cartilage 23.69 ms (2.44 ms); lateral tibial cartilage 20.98 ms (0.90 ms); patella 38.06 ms (3.63 ms). Discussion and conclusion: In the reference literature, the value for T2 relaxation time, which separates the damaged and non-damaged femur cartilage (ICRS grade) is 47.6 ms. There was no significant difference in T2 relaxation time between the sexes. The reference values for a non-damaged knee cartilage were defined for different areas of interest, which could be used in future research.
        Uvod: T2 mapiranje je kvantitativna metoda MR (magnetno resonančnega) slikanja, s katero lahko določimo stopnjo poškodbe hrustanca. Deluje na principu zajemanja signala z različnimi časi odmeva – TE (time of echo). Namen: Namen plakata je prikazati, kako smo določili referenčne vrednosti T2 relaksacijskega časa zdravega hrustanca glede na področje zanimanja (region of interest– ROI) za MR tomograf Philips Achieva 3.0 T TX. Metode: Izbrali smo 10 prostovoljcev, ki niso imeli znane poškodbe kolena. Uporabili smo pulzno zaporedje T2 mapiranje v sagitalni ravnini (TR 1000 ms; TE 6 ms, 12 ms, 18 ms, 24 ms, 30 ms, 36 ms, 42 ms, 48 ms; FOV 160 x 160 mm; voksel 0,8 x 0,9 mm; debelina rezine 3 mm; matrika 196 x 161; število povprečitev 1). Na parametrični mapi smo določili ROI na treh mestih (anteriorno, centralno in posteriorno), na področju medialnega in lateralnega hrustanca stegnenice, medialnega in lateralnega hrustanca golenice in pogačice (proksimalno, centralno, distalno). Povprečno izračunano vrednost smo predstavili kot T2 relaksacijski čas. Rezultati: T2 relaksacijski čas hrustanca (povprečje ± SD): medialni hrustanec stegnenice 42,34 ms (4,11 ms); lateralni hrustanec stegnenice 45,03 ms (6,69 ms); medialni hrustanec golenice 23,69 ms (2,44 ms); lateralni hrustanec golenice 20,98 (0,90 ms); pogačica 38,06 ms (3,63 ms). Razprava in zaključek: V literaturi so avtorji določili T2 relaksacijski čas 47,6 ms, kot tistega, ki loči zdravi hrustanec stegnenice od poškodovanega po ICRS (international cartilage repair) oceni. Razlika med spoloma v T2 relaksacijskem času ni značilna. Določili smo referenčne vrednosti zdravega hrustanca kolena za različna področja, kar nam lahko služi za nadaljnje razlikovanje med zdravim in poškodovanim hrustancem kolena na MR tomografu Philips Achieva 3.0 T TX.
      pubtype: Academic Journal
      doctype: Journal Article
      ougenre: Article
    language: Slovenian
    refInfo:
    holdings:
      @attributes:
        islocal: N