Ms. Joeana N. Cambranis Romero Profile

Joeana N. Cambranis Romero

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Publications (4)

Proceedings Article | 3 April 2023 Presentation + Paper

Towards virtual displays in the interventional radiology suite: a feasibility study

Daniel Allen, Nadia Cattari, Joeana Cambranis, Terry Peters, Elvis C. Chen

Proceedings Volume 12466, 124661A (2023) https://doi.org/10.1117/12.2654267

KEYWORDS: Visualization, Augmented reality, Liver, Image-guided intervention, Virtual reality, Image quality, Ablation, Light sources and illumination

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Proceedings Article | 4 April 2022 Poster + Paper

Development of a multi-modal liver phantom with flow for the validation and training of focal ablation procedures

Noa Chazot, Joeana Cambranis Romero, Terry Peters, Adam Rankin, Elvis C. Chen

Proceedings Volume 12034, 120342R (2022) https://doi.org/10.1117/12.2611919

KEYWORDS: Liver, Tumors, Computed tomography, Speckle, Ultrasonography, Tissues, Fourier transforms, Silicon, Veins, Manufacturing

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Proceedings Article | 4 April 2022 Poster + Paper

Development of a mini stereotactic guidance system for percutaneous focal liver tumor ablation

Joeana Cambranis Romero, Terry Peters, Elvis C. Chen

Proceedings Volume 12034, 120342F (2022) https://doi.org/10.1117/12.2611524

KEYWORDS: Tumors, Calibration, Sensors, Error analysis, Visualization, Liver, 3D modeling, Navigation systems, Ultrasonography, Surgery

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Percutaneous ablation is a viable treatment option for patients with early-stage hepatocellular carcinoma (HCC) who are not candidates for surgical resection or liver transplantation,1 but the efficacy of this procedure depends heavily on the surgeon’s ability to place the ablation probe accurately into the target tumor. This paper introduces a surgical navigation system for guiding an ablation needle percutaneously, using an electromagnetic tracking system and a mini-stereotactic aiming device. A clamp to attach an EM sensor was designed to attach to the a patient-attached needle guider. The pose information from the guider sensor after calibration was used to project a virtual line that follows the needle guider movements, and shows the applicator path before insertion. A surgical navigation application was developed in the 3D Slicer platform and a pose calibration technique was incorporated to ensure that the virtual needle path that is projected from the needle guider aligns with the physical needle once a needle is inserted into the guider. The estimated ablation zone, based on manufacturer’s guidelines, is displayed at the tip of the virtual path to help the user ensure total tumor coverage. The guidance software allows updating the estimated ablation zone in real-time depending on the treatment specifications. The ablation zone is displayed as a 3D model and as an ellipse overlaid on the 2D ultrasound video. A rotation analysis to obtain the angular error between two virtual lines (guider and a pre-calibrated needle) was performed in two different setups. The first was the ideal setup without anything that could bend the pre-calibrated needle, and the second used a Polyvinyl Alcohol cryogel Phantom. The results for the rotation analysis, mean and STD, for the ideal setup, was (0.33 ± 0.29)°; while using the PVA-c phantom the results (2.70 ± 0.07)°. These results suggest that the disposable mini-stereotactic needle guider has the potential to assist the surgeons in the accurate placement of the ablation needle in the clinical setting.

Proceedings Article | 4 April 2022 Presentation + Paper

Intra-procedural evaluation of tumor coverage using 3D US images for percutaneous focal liver thermal ablation

Shuwei Xing, Joeana Cambranis Romero, Derek Cool, Amol Mujoomdar, Leandro Cardarelli Leite, Elvis C. Chen, Terry Peters, Aaron Fenster

Proceedings Volume 12034, 120340P (2022) https://doi.org/10.1117/12.2611864

KEYWORDS: Tumors, 3D image processing, Liver, Safety, Tissues, Visualization, Visibility, Radiofrequency ablation, Medical research, Clinical trials

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