Producing diffuse ultrasound reflections from medical instruments using a quadratic residue diffuser.

Huang, J; Dupont, P; Undurti, A; Triedman, J; Cleveland, R

Journal article

Producing diffuse ultrasound reflections from medical instruments using a quadratic residue diffuser.

Abstract:: Simultaneous visualization of tissue and surgical instruments is necessary during ultrasound-guided medical procedures. Standard minimally invasive instruments are typically metallic and act as strong specular scatterers. As a result, such instruments saturate the image or disappear according to the angle of incidence, obscuring nearby tissue and making it difficult to determine the instrument's precise location. The objective of this study was to produce diffusive reflections from the surface of surgical instruments for improved visualization in ultrasound. A surface profile based on a 2D quadratic residue diffuser (QRD) was employed, which has been demonstrated to reduce specular reflection in other acoustic applications. The backscattered echo amplitude from the diffusive surface at various angles of insonation was measured and compared to that from unmodified metal surfaces and heart tissue surfaces. The QRD resulted in an 8 dB reduction of the specular signal. Furthermore, the dynamic range for angles up to 75 degrees was less than 20 dB for the QRD and more than 65 dB for a flat surface. The QRD surface produces two beneficial results for the simultaneous imaging of instruments and tissue. First, the conspicuity of diffusive surfaces in ultrasound images is markedly improved in comparison with unmodified metal surfaces. Secondly, the echo amplitude of diffusive metal surfaces differs in mean and standard deviation from that of tissue facilitating image enhancement and segmentation.

Publication status:: Published

Actions

Email

Email this record

Send the bibliographic details of this record to your email address.

Your Email
Please enter the email address that the record information will be sent to.

-
Your message (optional)
Please add any additional information to be included within the email.
Share
Cite

Cite this record

APA Style

Huang, J., Dupont, P., Undurti, A., Triedman, J., & Cleveland, R. (2006). Producing diffuse ultrasound reflections from medical instruments using a quadratic residue diffuser. Ultrasound in Medicine and Biology, 32(5), 721–727.

MLA Style

Huang, J, et al. “Producing Diffuse Ultrasound Reflections from Medical Instruments Using a Quadratic Residue Diffuser.” Ultrasound in Medicine and Biology, vol. 32, no. 5, 2006, pp. 721–27.

Chicago Style

Huang, J, P Dupont, A Undurti, J Triedman, and R Cleveland. 2006. “Producing Diffuse Ultrasound Reflections from Medical Instruments Using a Quadratic Residue Diffuser.” Ultrasound in Medicine and Biology 32 (5): 721–27.
Print