Abstract
Article: The Emerging Role of Elastography in Cancer: Diagnostic Value in Detecting and Assessing Therapeutic Response to Treatment
Author: Tia Mapes-Gonnella, BS, RDMS
Category: General/Abdominal Sonography
Credit: 1.0 SDMS CME Credit
Objectives: After studying the article entitled “The Emerging Role of Elastography in Cancer: Diagnostic Value in Detecting and Assessing Therapeutic Response to Treatment,” you will be able to:
Describe the different types of elastography imaging
Determine appropriate applications for elastography imaging
Describe the limitations of elastography imaging
Quasistatic elastography is an imaging technique that applies stress to tissue and then measures the resulting tissue Pressure Strain Force Velocity
Shear wave elastography determines tissue stiffness by creating shear waves and measuring their Pressure Strain Displacement Velocity
Acoustic radiation force impulse elastography uses a short burst of focused ultrasound to cause and then measure tissue Pressure Force Displacement Velocity
Typically, the most elastic tissue of those shown below is Normal tissue Malignant tissue Fibrotic tissue Inflammatory tissue
The type of cancer that would be most reliably detected by elastography is Papillary cancer Ductal Medullary cancer Pancreatic cancer
In general, the cancer type for which elastography has been reported to show the lowest sensitivity has been Pancreatic cancer Liver cancer Prostate cancer Breast cancer
When comparing elastography results, the sensitivity of low-quality images compared with high-quality images is lower by approximately 10% 20% 30% 40%
Failure or inaccuracy of elastography to differentiate benign from malignant lesions in the abdomen is considered primarily to be a result of Patient age Obesity Ethnicity Lesion size
Much of the variability in the reported accuracy of elastography to characterize lesions is considered to be caused by Lack of standardized technique, scoring, and interpretation Equipment Tumor stage Tumor size
For lesions in dense breasts, the positive predictive value of real-time elastography compared with B-mode ultrasonography has been reported to be higher by approximately 35% 25% 15% 5%
Footnotes