Dr. Benjamin Ciske Profile

Dr. Benjamin Ciske

at Univ of Wisconsin-Madison

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 | 8 March 2019 Paper

Dual-modality phantom for evaluating x-ray/echo registration accuracy

Lindsay Bodart, Timothy Hall, Jacob Ellis, Benjamin Ciske, Martin Wagner, Amish Raval, Michael Speidel

Proceedings Volume 10951, 109511V (2019) https://doi.org/10.1117/12.2512908

KEYWORDS: X-rays, Ultrasonography, Image registration, Fluoroscopy, Heart, Visualization, X-ray imaging

Read Abstract +

Transcatheter interventions for structural heart disease demand real-time visualization of catheter devices and their relationship to cardiac anatomy. Co-registration of x-ray fluoroscopy with echocardiography has been proposed to provide the necessary device and soft tissue visualization for these procedures. Development of real-time 3D x-ray/echo registration systems with device tracking has been hampered by the lack of a suitable test model. This study presents a phantom that is compatible with x-ray, CT, transthoracic (TTE), and transesophageal echo (TEE) for testing the feasibility and accuracy of new registration solutions. The phantom consists of a 20.3-cm diameter, 15-cm tall cylindrical shell with acoustic windows for TTE and an access port for a TEE probe. The interior contains 24 dual-modality targets, 5-mm in diameter, suspended in a three-turn helix occupying a volume that is similar to an adult heart. An ultrasound-compatible, tissue-mimicking slurry medium fills the remainder of the phantom. The dual-modality targets are agar based with barium sulfate (BaSO₄) powder and glass beads added to generate contrast in both x-ray and ultrasound. Appropriate concentrations of these additives were determined experimentally with contrast measurements in x-ray, CT, and ultrasound. Selected concentrations were 150 mg/mL BaSO₄ and 100 mg/mL of 53-63 μm diameter glass beads. Average target contrast (± SD) was 16% ± 2% in x-ray fluoroscopy (90 kV) and 1805 ± 99 HU in CT (100 kV). In ultrasound, target CNR was 4.30 ± 0.62 in 2D B-mode and 4.03 ±1.06 in 4D-mode images acquired at a center frequency of 2.8 MHz.

Proceedings Article | 13 March 2018 Paper

Clinical feasibility of x-ray based pose estimation of a transthoracic echo probe using attached fiducials

Lindsay Bodart, Benjamin Ciske, Martin Wagner, Amish Raval, Michael Speidel

Proceedings Volume 10576, 1057626 (2018) https://doi.org/10.1117/12.2293875

KEYWORDS: 3D modeling, X-rays, Sensors, Transducers, X-ray imaging, Heart, 3D image processing, Acoustics, Ultrasonography, 3D acquisition

Read Abstract +

Co-registered display of x-ray fluoroscopy (XRF) and echocardiography during structural heart interventions can provide visualization of both catheter-based devices and soft tissue anatomy. For transesophageal echocardiography (TEE), registration can be achieved by estimating the probe pose in the x-ray image. This work investigated the potential clinical requirements for a similar approach using a transthoracic echocardiography (TTE) probe with attached x-ray-visible fiducials. Clinically, the limited number of acoustic windows for TTE dictates probe positioning on the chest, and the interventional task drives the positioning of the C-arm gantry of the x-ray system. A fiducial apparatus must be compatible with these positions and allow for accurate 3D probe pose estimation. TTE imaging of the aortic and mitral valves was performed on eight healthy subjects to determine typical 3D probe positioning in parasternal and apical acoustic windows. This data was incorporated into software that allowed for the simulation of different 3D configurations of fiducials relative to the probe, patient and x-ray system. Three candidate fiducial designs were identified, each consisting of two 40-mm diameter rings with 16 3-mm diameter spheres. X-ray imaging was simulated for C-arm angles of 30° RAO, PA, and 30° LAO, each with cranial-caudal angles typical of a TAVR procedure. Subjectively graded TTE image quality was highest for the parasternal long axis window. A fiducial configuration for the parasternal long window was identified which yielded median 3D TRE ranging from 0.44 mm to 1.04 mm in simulations. An experimental prototype of this design produced a measured 3D TRE of 1.25±0.19 mm.

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