Comparison of MRI- and CT-based patient-specific guides for total knee arthroplasty

Accuracy of MRI-based vs. CT-based patient-specific instrumentation in total knee arthroplasty: A meta-analysis

“…On the other hand, MRI is able to avoid this radiation exposure, but the scanning process is longer in duration, and more costly. Two previous studies [8,12] have also demonstrated a decreased operative time with MRI-based cutting guides compared to CT-based guides, which may decrease postoperative complications associated with increased operative duration, such as blood loss and deep vein thrombosis. No formal meta-analysis could be performed comparing this parameter, due to the limited number of studies reporting it.…”

“…This provides the surgeon with multiple points of reference to ensure appropriate registration of the cutting guide, allowing the cutting guides to sit more concentrically on patients' native anatomy, producing more accurate cuts [11]. On the other hand, CT-based guides are unable to account for the residual cartilage [8], and therefore, only a limited selection of bony landmarks are used to ensure the appropriate registration of the CT-based cutting guide. Therefore, the cutting guide may sit more eccentrically on patients' bony anatomy compared to MRI-based guides, thus limiting the accuracy of the CT-based PSI.…”

“…Thirdly, tibial component rotation in the axial plane could not be compared, as it was very uncommonly reported-an observation which has been made in another recently published systematic review [22]. Finally, the results of this meta-analysis did not account for several potential confounding factors, including surgeon experience, as well as inter-observer discrepancies when performing radiographic Asada [8] 2014…”

Accuracy of the femoral tunnel position in robot‐assisted anterior cruciate ligament reconstruction using a magnetic resonance imaging‐based navigation system: A preliminary report

“…21 MRI-based orthopaedic surgeries such as computer-assisted spinal surgery using 3D MRI or MRI-based totalknee arthroplasty have also been tried, and good results have been reported. 22,23 Several previous studies have investigated the accuracy of tunnel positioning in ACL reconstruction using a navigation system.…”

Structure-enhanced local phase filtering using L0 gradient minimization for efficient semiautomated knee magnetic resonance imaging segmentation

“…It has recently been suggested that MRI scans of the knee provide results that are comparable to computed tomography scans for patient-specific TKA. [5][6][7][8][9] Nonetheless, MRI has some problems as well, such as low contrast between bone and surrounding tissue, and noise. The development of algorithms that allow for automatic and semiautomatic segmentation of MRIs has, therefore, been the focus of much research.…”