24
Views
18
CrossRef citations to date
0
Altmetric
Original Article

Temperature artifacts produced by thermocouples used in conjunction with 1 and 3 MHz ultrasound

&
Pages 383-399 | Received 09 Dec 1988, Accepted 12 Jun 1989, Published online: 09 Jul 2009
 

Abstract

The relative temperature artifacts produced by a selection of commercially available thermocouples and catheters were evaluated in radiation bolus and beef phantoms heated by 1 and 3 MHz continuous ultrasound. The thermocouples included a 23 gauge needle microprobe inserted directly into the phantoms, polyurethane-sheathed, Teflon-sheathed, and exposed-tip thermocouples, each inserted into a 19 gauge polyurethane closed-end catheter, a multisensor Teflon-sheathed probe inserted into a 16 gauge polyurethane catheter and a Teflon-sheathed single-sensor probe without a catheter. The needle microprobe and the polyurethane-sheathed thermocouple produce equivalent artifacts. The artifacts produced by the Teflon and exposed-tip thermocouples are 1.4 ± 0.3 times greater, that produced by the multisensor Teflon-sheathed probe is 2.1 ± 0.3 times greater, and that produced by the Teflon-sheathed thermocouple without a catherer is 2.3 ± 0.4 times greater. The results in the beef phantom indicate that the needle microprobe and polyurethane-sheathed thermocouple both produce artifacts of 0.7 ± 0.1 degrees in tissue at an SAR of 100 W/kg.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.