Ivan Maldonado Zambrano

Ivan Maldonado Zambrano
Otto-von-Guericke-Universität Magdeburg | OvGU · Institut für Biometrie und Medizinische Informatik

Master of Science

About

22
Publications
2,540
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
92
Citations
Citations since 2016
22 Research Items
92 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025

Publications

Publications (22)
Article
Full-text available
In robot-assisted procedures, the surgeon controls the surgical instruments from a remote console, while visually monitoring the procedure through the endoscope. There is no haptic feedback available to the surgeon, which impedes the assessment of diseased tissue and the detection of hidden structures beneath the tissue, such as vessels. Only visua...
Conference Paper
Full-text available
In this work we summarize applications of a novel approach for providing complementary information for guiding medical interventional devices (MID) and that have been recently published by our research team. This approach consist of using an audio sensor located in the proximal end of the MID in order to extract meaningful information concerning th...
Article
Full-text available
The location of a puncture needle’s tip and the resistance of tissue against puncture are crucial information for clinicians during a percutaneous procedure. The tip location and needle alignment can be observed by image guidance. Tactile information caused by tissue resistance to rupture, allow clinicians the perception of structural changes durin...
Article
Full-text available
Thermographic imaging is a known technology to detect temperature differences. For medical applications, the patterns of heat distribution are used for diagnosis. It is already tested to visualize blood supply, inflammatory processes, and superficial or more extensive tumors, e.g. in the breast tissue. This method was promoted for breast screening...
Article
Full-text available
Cerebrovascular diseases such as stenosis, atherosclerosis or distention of the carotid artery are accountable for about 1 million death per year across Europe. Diagnostic tools like ultrasound imaging, angiography or magnetic resonance-based imaging require specific hardware and highly depend on the experience of the examining clinician. In contra...
Article
Full-text available
Background: The magnetic resonance imaging (MRI) environment with its high-strength magnetic fields requires specialized and sometimes sophisticated solutions for otherwise simple problems. One of these problems is MR-compatible actuator mechanisms that transfer a signal into an action. Purpose: Normal actuators are based on a magnetic effect (eg,...
Article
Full-text available
Robotic minimally invasive surgery (RMIS) has played an important role in the last decades. In traditional surgery, surgeons rely on palpation using their hands. However, during RMIS, surgeons use the visual-haptics technique to compensate the missing sense of touch. Various sensors have been widely used to retrieve this natural sense, but there ar...
Conference Paper
Full-text available
Digital pathology can be thought of as a model composed of 3 main elements; classification algorithm, Graphical User Interface (GUI) and the pathologists. Currently there is only a one way interaction from the classification algorithm to the pathologist. This paper, proposes an additional backward path which is a new feedback-based method, aimed to...
Conference Paper
Full-text available
Cerebrovascular diseases such as stenosis of the carotid artery are accountable for about 1 million death per year across Europe. Diagnostic tools like US, angiography or MRI require specific hardware and highly depend on the experience of the examining clinician. In contrast auscultation with a stethoscope can be used to screen for bruits - audibl...
Research
Full-text available
Medical Interventional devices (MIDs) such as needles, catheter and guide wires are challenging to use during interventional surgeries due to interrupted visualization and artefacts. Therefore, MIDs need highly efficient accessories to allow targeting and verification simultaneously. Diagnostic imaging devices (CT, Ultrasound, X-rays and MRI) are o...
Article
Full-text available
Robotic surgeries are still limited with respect to the surgeon’s natural senses. The tactile sense is exceptional important in conventional clinical procedures. To identify critical structures inside the tissue, palpation is a commonly used technique in conventional open surgeries. The underlying organ or pathological structures conditions (health...
Article
Full-text available
We propose a new and complementary approach to image guidance for monitoring medical interventional devices (MID) with human tissue interaction and surgery augmentation by acquiring acoustic emission data from the proximal end of the MID outside the patient to extract dynamical characteristics of the interaction between the distal tip and the tissu...
Conference Paper
Auscultation is the acoustic diagnosis of the internal sounds of the body, using a stethoscope. It is performed for examination of the sounds of the circulatory and respiratory systems. Experienced clinicians can hear the flow of blood e.g. in the carotid arteries. We assume that this sound will change over the human life time due to changes inside...
Conference Paper
Full-text available
Non-invasive methodologies for diagnostic and prevention of cardiovascular problems has a special interest in the measurement of blood pressure because of its implications in arterial stiffness, mostly as a consequence of arteriosclerosis. Assuming an established relationship in the literature between the blood pressure and the carotid artery flow...
Conference Paper
Full-text available
Artery guidewire-induced perforation during coronary interventions is an uncommon but potentially serious complication with significant morbidity and mortality rates. For minimizing its impact it is crucial for the surgeon to early detect that a perforation has occurred. However, this is not always easy since perforation sometimes is not characteri...

Network

Cited By

Projects

Projects (2)
Project
In minimally invasive procedures, navigation of Medical Interventional Device (MID) is a challenging task. The clinicians' experience is an essential pre-requirement to complete the procedures without damaging structures or organs. Medical imaging can assist the procedure, which can, however, lead to inaccuracies caused by modality dependent artifacts. Sensor-based solutions have been proposed for improving the accuracy by acquiring additional guidance information from MIDs. This typically requires the sensors to be embedded in the MID tip, leading to direct tissue contact, sterilization issues, and added complexity and cost. Considering these issues, we came up with a new concept for acquiring additional complementary information for guiding MIDs in minimally invasive procedures. This concept is based on using acoustic emission (AE) with a sensor connected at the proximal end of the tool in order to capture information, non-invasively outside the body, concerning the dynamics occurring between the tip of the tool and the tissue. The audio signal resulting from the MID-tissue interactions starting at the tip of the instrument naturally propagates through its shaft so that they can be picked up and detected by an audio sensor located at the proximal end of the instrument. This signal can be then processed in order to extract useful guidance information that can be then mapped into feedback to surgeons during minimally invasive procedures. The main advantage of this novel approach is that no sensor is needed to be placed in direct contact with the patient organs and tissues. The development of an AE guidance solution would allow us to acquire information from conventional MIDs, as a sort of plug-and-play device without the necessity of rebuild specialized instruments and use the already existing ones. This should result in less complicated solutions than the existing one, allowing a faster clinical approval. During the last years, we have tested the SurAG approach with several MIDs such as biopsy needles, guide wires, and laparoscopic and robotic tools, and we have extracted different types of information using advanced signal processing and classification procedures.