Generating 3D pseudo-healthy knee MR images to support trochleoplasty planning
By
Michael Wehrli
Alicia Durrer
Paul Friedrich
Volodimir Buchakchiyskiy
Marcus Mumme
Edwin Li
Gyozo Lehoczky
Carol C. Hasler
Philippe C. Cattin
March 26, 2025
Clinical Scorecard: Creating 3D Pseudo-Normal Knee MRI Images to Aid in Trochleoplasty Strategy Development
At a Glance
Category Detail
Condition Trochlear dysplasia (TD), an anatomical deformity of the trochlea femoris causing patellar maltracking and instability Key Mechanisms Malformation of the trochlea leads to lateralized patellar tracking, increasing dislocation risk and potential osteoarthritis Target Population Adolescents with anterior knee pain and instability due to trochlear dysplasia Care Setting Orthopedic surgical planning and intervention, primarily preoperative imaging and trochleoplasty surgery
Key Highlights
Trochlear dysplasia causes patellar instability and can lead to osteoarthritis if untreated. Current trochleoplasty outcomes vary due to challenges in achieving correct trochlear shape without cartilage damage. The proposed method generates patient-specific pseudo-healthy MR images to support individualized preoperative planning. Guideline-Based Recommendations
Diagnosis
Use MRI to assess trochlear morphology and sulcus angle for diagnosing TD. Apply the Déjour criterion as the standard clinical diagnostic method for TD. Management
Perform trochleoplasty surgery to correct trochlear malformation and improve patellar tracking. Consider individualized preoperative planning using pseudo-healthy MR images to tailor surgical correction to patient-specific anatomy. Monitoring & Follow-up
Monitor postoperative pain and functional outcomes due to variable patient satisfaction after trochleoplasty. Use imaging follow-up to assess trochlear shape and patellar tracking post-surgery. Risks
Risk of damaging fragile femoral cartilage during trochleoplasty. Potential for persistent pain and dissatisfaction if trochlear shape correction is inadequate. Radiation exposure concerns with CT imaging; MRI preferred for young patients. Patient & Prescribing Data
Adolescents undergoing trochleoplasty for trochlear dysplasia
Preoperative MR imaging is standard; generating pseudo-healthy images may improve surgical planning and outcomes while reducing need for open surgery.
Clinical Best Practices
Utilize MRI-based imaging to avoid radiation exposure in young patients. Incorporate patient-specific anatomical data, including patella shape, into preoperative planning. Employ advanced imaging techniques such as wavelet diffusion models for generating pseudo-healthy images. Mask pathological regions carefully to enable accurate inpainting of healthy trochlear morphology. Aim for minimally invasive surgical approaches supported by detailed preoperative imaging. References
