Radiation dose reduction in thoracic and lumbar spine instrumentation using navigation based on an intraoperative cone beam CT imaging system: a prospective randomized clinical trial.

Purpose: Spine surgery still remains a challenge for every spine surgeon, aware of the potential serious outcomes of misplaced instrumentation. Though many studies have highlighted that using intraoperative cone beam CT imaging and navigation systems provides higher accuracy than conventional freehand methods for placement of pedicle screws in spine surgery, few studies are concerned about how to reduce radiation exposure for patients with the use of such technology. One of the main focuses of this study is based on the ALARA principle (as low as reasonably achievable).

Surgical Treatment of Intra-articular Knee Venous Malformations: When and How?

Background: To assess the efficacy of surgical treatment of intra-articular knee venous malformations (VM).

Methods: Between 1998 and 2010, 8 children (mean age: 12.3 y) underwent surgical resection of their vascular malformation (7 venous and 1 capillary venous) involving the knee joint.

Fracture risk in unicameral bone cyst. Is magnetic resonance imaging a better predictor than plain radiography?

The classical indication for treating a simple bone cyst is usually the risk of fracture, which can be predicted based on three parameters: the bone cyst index, the bone cyst diameter, and the minimal cortical thickness. A retrospective review was carried out based on imaging of 35 simple bone cysts (30 humeral and 5 femoral). The three parameters were measured on standard radiographs, and on T1-weighted and T2-weighted MRI.