Features | Partner Sites | Information | LinkXpress
Sign In
ElsMed
Schiller
Ampronix

Quantitative Ultrasound Shown to Optimize Assessment of Long Bone Fracture

By Medimaging International staff writers
Posted on 27 Aug 2014
Image: Fig. 1a and Fig. 1b depict the guided signals in the intact and fractured long bones, respectively. These images shows an (a) intact and (b) 1-mm width 100% depth fracture (Photo courtesy of Science China Press).
Image: Fig. 1a and Fig. 1b depict the guided signals in the intact and fractured long bones, respectively. These images shows an (a) intact and (b) 1-mm width 100% depth fracture (Photo courtesy of Science China Press).
Research has revealed that mode conversion of ultrasonic-guided waves can quantitatively indicate the fracture degree of long cortical bone, which may provide a new way of evaluating long bone fracture and monitor healing.

This study was published July 24, 2014, in the journal SCIENCE CHINA Physica, Mechanica & Astronomica. Prof. T.A. De-an, from School of Information Science and Technology at Fudan University (Shanghai, China) led the study, which quantitatively analyzed the impact of fracture width and depth on the amplitude of guided waves.

Bone fracture is a medical disorder in which bone discontinuity is created by stresses higher than the bone can bear. Statistical studies show that 5%–10% of the fractured patients are suffering healing complications. Fracture healing is a proliferative process, and full recovery can take up to three to five years. The pathology in the healing process is easily overlooked, leading to severe bone loss and secondary damage, impacting the physical condition of the patients. Therefore, early diagnosis of the healing problem is key to ensure the healing process. The accurate diagnosis and dynamic monitoring are essential for prompt treatment.

With the advantages of quantitative ultrasound (QUS), such as portability, inexpensive, and nonionizing radiation, ultrasonic guided waves can also detect the geometry of long cortical bone, (e.g., profile, thickness, and section) and measure the material parameters (e.g., BMD, porosity and Young’s modulus), which has attracted increasing attention. However, due to the little understood nature of ultrasound propagation in long cortical bones, ultrasonic-guided wave technology has not been widely applied to the clinical practice of the long bone fracture evaluation.

Numeric simulations are performed to analyze the guided waves propagation in the fractured long bone. The novelty of this study is the use of narrowband low-frequency ultrasound to avoid the multimode overlap. Only two fundamental guided modes, symmetric S0 and asymmetric A0, are excited, which simplifies the mode separation and quantitative determination. The impact of fracture width and depth on the amplitudes of each guided modes were quantitatively discussed in the article. The amplitude of the A0 mode is very sensitive to the width and depth variation. The ratio between the amplitudes of S0 and A0 is further proposed to be used in the evaluation of the fracture degree.

The mode conversion of the ultrasonic-guided waves can, therefore, characterize the changes in the fracture depth and fracture width and provide quantitative parameters fracture evaluation. The study may also be helpful to the ultrasound monitoring of long bone healing, according to the researchers.

Related Links:

Fudan University



Channels

Radiography

view channel

Analysis Tool Shows Proton Therapy Less Expensive Than IMRT for Advanced Head and Neck Cancers

The episodic cost of care using intensity-modulated proton therapy (IMPT) in advanced stage head and neck cancer is less expensive than intensity-modulated radiotherapy (IMRT), according to new findings. The new proof-of-concept study uses a cost analysis tool that can be used to outline the value of competing healthcare... Read more

MRI

view channel

Dyslexic Patients Shown to Have Disordered Network Connections in the Brain

Scientists conducted a whole-brain functional connectivity analysis of dyslexia using functional magnetic resonance imaging (fMRI), and revealed how brain activity is disordered in dyslexic patients. Dyslexia is a neurologic reading disability that occurs when the regions of the brain that process written language do... Read more

Nuclear medicine

view channel

PET Imaging Reveals Brain Benefits from Weight Loss After Bariatric Surgery

Imaging studies revealed that weight loss surgery has been found to suppress changes in brain metabolism associated with obesity and improve cognitive function involved in planning, strategizing, and organizing. Therefore, researchers have hypothesized that a specific surgical procedure could reduce risk of Alzheimer’s... Read more

General/Advanced Imaging

view channel
Image: From left, Guy Genin, PhD, John Boyle and Stavros Thomopoulos, PhD, watch as a sample is exposed to stress and force. They have developed algorithms that may lead to the ability to identify weak spots in tendons, muscles and bones (Photo courtesy of Washington University in St. Louis).

Image Analysis Algorithms Devised to Find Weak Spots in Muscles, Tendons, and Bones prone to Tearing, Breaking

Researchers have developed algorithms to detect weak spots in muscles, tendons, and bones predisposed to tearing or breaking. The technology, which needs to be further refined before it is used in patients,... Read more

Imaging IT

view channel

Interactive Dashboard and Visualization Tool Designed for Oncologists

A new tool has been developed to help users of an information system for radiation oncology to analyze data and use metrics to help make more informed decisions. Varian Medical Systems (Palo Alto CA, USA), a developer of cancer treatment technology and informatics software for managing comprehensive cancer clinics, will... Read more

Industry News

view channel

USD 12 Billion Out of Total Spent on Medical Imaging Squandered in the US

The United States wastes close to USD 12 billion on unnecessary medical imaging yearly, according to a new survey of 196 hospital leaders. Smart data company peer60 (American Fork, UT, USA) surveyed 196 healthcare leaders about medical imaging in less than two weeks and found a number of reasons for the squandered resources.... Read more
 
Copyright © 2000-2014 Globetech Media. All rights reserved.