3D CT KNEE JOINT

Introduction 

3D CT scans (Computed Tomography) of the knee join represent state-of-the-art procedures that give precise three-dimensional visualization of the bony structures, cartilage, and the joints of the knee. It is extremely useful for surgical planning, trauma assessment, evaluation of degenerative changes, and assessment of some congenital anomalies. 

What is a 3D CT Knee Joint? 

This scan can be modified to produce cross-sectional views or slices which can be reconstructed three dimensionally using computerized software. These images help in assessing the anatomy of the bones, joints, alignment, and other structures constituting the knee joint. 

• Rotation and translation of the prosthetic knee joint  
• Position of the knee joint  
• Joint surfaces separation and intra-articular space measurement  
• Condition of surrounding soft tissues including osteophyte and degeneration quantification  

• Evaluating trauma to the articular surface or surrounding soft tissues in detail  
• Evaluating complications related to prosthetic devices  
• Malalignment of joints and dislocation diagnosis  
• Stage bone tumours or lesions for treatment  
• Planning rotational and translational osteotomies or other surgical intervention 

When and Who Needs a 3D CT Knee Joint Scan? 

Indications: 

• Traumatic knee injuries with possible fractures  
• Evaluation before performing a total knee arthroplasty  
• Assessment of chronic knee joint pain or stiffness  
• Suspected tumours or infections in bone  
• Assessment of congenital deformities of the knee joint  

Patient Demographics: 

• Osteoarthritic patients aged 65 and above  
• Athletes with chronic knee injuries  
• Patients undergoing primary or revision knee replacement surgeries  
• Paediatric patients with congenital skeletal malformations  

Benefits of Taking the Test

• Precise 3D diagnostic imaging tailored to the patient's requirement 
• Aids in strategizing extremely intricate surgical operations. 
• Prompt and non-invasive 
• Specialized imaging detects complex fractures that are not visible on X-ray images 

Conditions Diagnosed

• Fractures of the tibial plateau 
• Femur fractures at their distal end 
• Osteoarthritis and decreased cartilage 
• Osteochondritis dissecans 
• Tumour and bones infections 

• Do not wear clothing containing metals 
• Bring previous images or surgeries 
• Fasting not required unless contrast will be used 

Pre-requisites 

• Must include physician referral 
• Should declare allergy, kidney functions concerning the use of contrast dye 

Best Time to take the test 

• In accordance with urgency and the surgical timeline 
• In surgery, preferably morning hours for early results 

Eligibility 

• Most patients are fine 
• Do not use contrast in case of total renal failure 

Procedure for taking the test 

The patient reclines on the CT scanning table with the knee in the desired position and aligned correctly 

• The patient’s leg is casted to prevent any movement of the limb 
• Duration of scanning takes about five to ten minutes 
• If required, dye may be injected 
• The 3D reconstruction is performed using specific computer programs relevant to the patient’s data 

Caution before taking the test 

• Avoid blurring images by remaining stationary for the duration of scanning 
• Must inform the Technologist of any implants, pregnancy, allergies