title: Potential femoral head osteonecrosis model induced by high-intensity focused ultrasound.
abstract: Osteonecrosis of the femoral head is a common disease that can result in complex hip replacement. To evaluate potential treatments, a model that consistently creates osteonecrosis is needed. We studied and demonstrated the possibility of developing an osteonecrosis model using high-intensity focused ultrasound (HIFU) on canine femora in vitro. To achieve these goals, the temperature in the medullary cavity of the femoral head was measured. A phenomenological model was developed to fit the measured temperature variations with the HIFU parameters for similar HIFU experiments on femoral heads. The average temperature discrepancy between model and measured values was less than 0.83°C. Histology confirmed that the temperature in the medullary cavity can be elevated to a level at which an acute thermal injury is created. HIFU has the potential to be used in a non-invasive model of osteonecrosis.
authors: Department of Computer and Electrical Engineering, Iowa State University, Ames, Iowa, USA.
authors: T
authors: T
authors: Long
authors: J
authors: J
authors: Xu
authors: S R
authors: SR
authors: McClure
authors: V
authors: V
authors: Amin
authors: J
authors: J
authors: Haynes
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D004285:Dogs; D005240:Feasibility Studies; D005269:Femur / Q000503:physiopathology* / Q000528:radiation effects*; D005271:Femur Head Necrosis / Q000209:etiology* / Q000503:physiopathology*; D019220:High-Energy Shock Waves; D057086:High-Intensity Focused Ultrasound Ablation / Q000379:methods*; D006801:Humans; D011829:Radiation Dosage