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Clinical Trial Summary

The goal of this project is to adapt the super-resolution ultrasound imaging technology motion-model Ultrasound Localization Microscopy (mULM) to clinical application. In this exploratory patient study a scan protocol will be established to subsequently investigate whether mULM allows the assessment of the tumor response to neoadjuvant chemotherapy in participants with a primary breast cancer diagnosis as well as for the differentiation of benign and malignant breast tumors in participants with lesions of unknown dignity.


Clinical Trial Description

This study on the clinical translation of the super-resolution ultrasound imaging technique motion-model ultrasound localization microscopy (mULM) is composed of three parts. First, an ultrasound scan protocol will be developed by providing patients with primary breast carcinoma with an ultrasound scan to assess the size, location, and structure of the tumor. Images in the form of B-mode ultrasound, elastography, and contrast ultrasound will be obtained, and mini-movies of the CEUS examinations will be evaluated in a post-processing step. There, individual microbubbles of the ultrasound contrast agent will be identified and tracked to reconstruct the microvasculature of the tumor lesions. Participants will each receive 2 different doses of the clinically approved ultrasound contrast agent SonoVue®. The morphological and functional parameters obtained through the post-processing with the mULM algorithm are then analyzed and subsequently validated with histological examinations. Finally, the ultrasound examination protocol will be optimized and the corresponding dosage of the ultrasound contrast agent determined. The examination protocol established in the first section will subsequently be applied to patients with primary breast carcinoma receiving neoadjuvant chemotherapy. Contrast-enhanced ultrasonography will be performed at three time points during the chemotherapy cycles and will be performed to assess tumor perfusion through application of the mULM-algorithm. The dosage of contrast agent is based on the dosage found in the previous part of the study. The CEUS examination is followed by the infusion of the chemotherapeutic agent. After completion of neoadjuvant chemotherapy, surgical resection of the tumor and microscopic examination of the tissue are performed according to guidelines. In the final part of the study, patients with suspected breast tumor lesions are examined. They will first receive non-contrast-enhanced diagnostic ultrasound (B-mode and elastography). A contrast-enhanced ultrasound examination is performed on the largest lesion. To further develop the mULM methodology, this is performed as both 2D and 3D acquisition. The dosage of the contrast agent examination is again based on the optimal dosage found in the first study part. This ultrasound procedure is followed by guideline-guided biopsy for histologic clarification of the tumors, assessing dignity, hormone receptor as well as and HER2/neu status, proliferation rate, and vessel density. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05445050
Study type Interventional
Source RWTH Aachen University
Contact Elmar Stickeler, Prof Dr. med
Phone +492418088400
Email estickeler@ukaachen.de
Status Recruiting
Phase N/A
Start date April 26, 2021
Completion date October 1, 2024

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