title: In vivo triple quantum filtered twisted projection sodium MRI of human articular cartilage.
abstract: In this work, we present the first triple quantum filtered (TQF) sodium MR images of the human knee joint in vivo. A 3D TQF data set of 16 slices was obtained in 20 min using a TQF pulse sequence preencoded to a twisted projection imaging readout. Images clearly demarcate patellar cartilage and also demonstrate fluid signal suppressed by the triple quantum filter. Biexponential transverse relaxation times were calculated by fitting the TQF free induction decay to a theoretical signal expression. The average values from three healthy volunteers were T(2fall)(*) = 9.59 +/- 0.35 ms and T(2rise)(*) = 0.84 +/- 0.06 ms. Application of TQF imaging in biological tissues is discussed.
authors.affiliation: Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
authors.forename: A
authors.initials: A
authors.lastname: Borthakur
authors.forename: I
authors.initials: I
authors.lastname: Hancu
authors.forename: F E
authors.initials: FE
authors.lastname: Boada
authors.forename: G X
authors.initials: GX
authors.lastname: Shen
authors.forename: E M
authors.initials: EM
authors.lastname: Shapiro
authors.forename: R
authors.initials: R
authors.lastname: Reddy
mesh_terms: D002358:Cartilage, Articular / Q000033:anatomy & histology / Q000737:chemistry*; D006801:Humans; D007719:Knee Joint / Q000033:anatomy & histology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D012964:Sodium / Q000032:analysis*
chemical_list: D012964:Sodium