Ms. Lu Qian Profile

Lu Qian

at Nanjing Univ of Aeronautics and Astronautics

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 19 December 2022 Poster + Paper

Study on the effectiveness of infrared thermal imaging method in evaluating microwave ablation curative effect

Lu Qian, Xiaofei Jin, Zhiyu Qian, Chunxiao Chen

Proceedings Volume 12320, 123201U (2022) https://doi.org/10.1117/12.2642268

KEYWORDS: Thermography, Infrared radiation, Infrared imaging, Microwave radiation, Computer simulations, Liver, Tissues, Image processing, Tumors, Thermal effects

Read Abstract +

Aiming at the problem that in microwave tumor ablation surgery, there is a lack of 2D curative effect evaluation method during and after clinical operations. This article discusses whether the infrared thermal imaging method can be used as an effective 2D evaluation method. This paper conducted two sets of experiments to validate whether the infrared thermal imaging method is effective and whether it can be used in real-time monitoring. In the experiments, microwave ablation system is used to conduct in vitro porcine liver ablation with different times and powers. In the first set, the size and shape of the ablation area are measured after the ablation time is completed, then actual ablation results, infrared thermal imaging results and simulation results are compared. In the second set, the infrared thermal imaging results are captured every minute during the ablation process, then compared with simulation results at each minute. Results show that the size and shape of the ablation area from the actual ablation experiments, the infrared thermal imaging method and the simulation are consistent, also the temperature change and the distinction of the different ablation zones are also consistent. In addition, second set experiment results are consistent with the intraoperative results. These results validate that the infrared thermal imaging method can be used as an effective real-time intraoperative and postoperative curative 2D evaluation method.

Proceedings Article | 9 October 2021 Poster + Paper

Feasibility study of using reduced scattering coefficient as a monitoring and evaluation factor for tumor microwave ablation therapy

Lu Qian, Jinzhe Zhao, Xiaofei Jin, Zhiyu Qian, Chunxiao Chen

Proceedings Volume 11900, 1190034 (2021) https://doi.org/10.1117/12.2602567

KEYWORDS: Tumors, Liver, In vitro testing, Tissue optics, Thermography, Optical properties

Read Abstract +

Finding an effective monitoring and evaluation factor for therapeutic effect of microwave ablation is becoming a research focus. Previous MWA experiments on in vitro porcine liver found that reduced scattering coefficient ( μ'_s ) is an efficient optical evaluation parameter. Results indicated that μ'_s of normal tissue and coagulation tissue is 3-5 cm^-1 and 17-19 cm^-1, respectively, and μ'_s is highly related to the degree of thermal damage. This paper aims to validate if these results from in vitro porcine liver also applies to real tumor. Two sets of experiments were carried out with human liver tumor specimens. In the first experimental set, the tumor specimen was heated by water bath at constant temperature of 80 ℃ for 5 minutes, and μ'_s was obtained before and after the heating process. In the second set, another tumor specimen was heated by MWA with microwave power of 10 W for 5 min, reduced scattering coefficient and temperature changes were measured during ablation. In the first experiment, μ'_s value was 4.10 cm^-1 before heating and increased to 17.16 cm^{- 1} after complete tissue protein coagulation. In the second experiment, μ'_s grew exponentially first and eventually stabilized. μ'_s values are consistent with previous experiments on in vitro porcine liver. These results also validates that the μ'_s values reflect the degree of thermal damage, and be captured in real-time. To sum up, μ'_s is an effective real-time thermal damage monitoring and evaluation factor that can be applied to real tumors.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years