Standardized Knee MRI Protocol

MRI was performed using a dedicated knee coil in a 1.5T system (Philips, Medical Systems, Best, The Netherlands). Our standardised scanning protocol consisted of1 (link) Coronal proton density (PD) turbo spin echo (TSE), repetition time (TR)/echo time (TE) 2335/35 ms; echo train length (ETL) 6,2 (link) coronal frequency selective fat-suppressed PD TSE (TR/TE 2334/35 ms; ETL 6, 3 mm slice thickness);3 (link) sagittal PD TSE (TR/TE 2338/35; ETL 6; 3.5 mm slice thickness);4 (link) sagittal frequency selective fat-suppressed T1-weighted three-dimensional gradient echo sequence (TR/TE 11/5.5; 25° flip angle; 150 mm field of view, 272×512 acquisition matrix, 2 mm slice thickness with a 1 mm overlap between images);5 (link) axial frequency selective fat-suppressed PD TSE (TR/TE 3225/15; ETL 6, 4 mm slice thickness). In all TSE sequences, we used a 150–160 mm field of view and a 304×512 acquisition matrix. Total acquisition time, including the initial survey sequence, was 30 min.

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Visser A.W., Mertens B., Reijnierse M., Bloem J.L., de Mutsert R., le Cessie S., Rosendaal F.R, & Kloppenburg M. (2016). Bakers' cyst and tibiofemoral abnormalities are more distinctive MRI features of symptomatic osteoarthritis than patellofemoral abnormalities. RMD Open, 2(1), e000234.

Publication 2016

1.5T system

A a 1 Echo Knee Proton Tr 35

Corresponding Organization : Leiden University Medical Center

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Variable analysis

independent variables

Magnetic field strength (1.5T)

dependent variables

Coronal proton density (PD) turbo spin echo (TSE) imaging
Coronal frequency selective fat-suppressed PD TSE imaging
Sagittal PD TSE imaging
Sagittal frequency selective fat-suppressed T1-weighted three-dimensional gradient echo imaging
Axial frequency selective fat-suppressed PD TSE imaging

control variables

Dedicated knee coil
Repetition time (TR) and echo time (TE) parameters for each imaging sequence
Echo train length (ETL) for each TSE sequence
Slice thickness for each imaging sequence
Field of view (FOV) and acquisition matrix for all TSE sequences
Flip angle for sagittal frequency selective fat-suppressed T1-weighted three-dimensional gradient echo sequence

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